/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/queue-add-3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 18:09:59,702 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 18:09:59,704 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 18:09:59,738 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-21 18:09:59,738 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-21 18:09:59,742 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-21 18:09:59,743 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-21 18:09:59,748 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-21 18:09:59,750 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-21 18:09:59,754 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-21 18:09:59,755 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-21 18:09:59,755 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-21 18:09:59,756 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-21 18:09:59,756 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-21 18:09:59,757 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-21 18:09:59,757 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-21 18:09:59,758 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-21 18:09:59,758 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-21 18:09:59,759 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-21 18:09:59,760 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-21 18:09:59,761 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-21 18:09:59,764 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-21 18:09:59,767 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-21 18:09:59,769 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-21 18:09:59,774 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-21 18:09:59,776 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-21 18:09:59,776 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-21 18:09:59,777 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-21 18:09:59,777 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-21 18:09:59,778 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-21 18:09:59,778 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-21 18:09:59,778 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-21 18:09:59,779 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-21 18:09:59,779 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 18:09:59,779 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 18:09:59,780 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 18:09:59,784 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 18:09:59,813 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 18:09:59,813 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 18:09:59,817 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 18:09:59,817 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 18:09:59,817 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 18:09:59,818 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 18:09:59,818 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 18:09:59,818 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 18:09:59,818 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 18:09:59,818 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 18:09:59,818 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 18:09:59,819 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 18:09:59,827 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 18:09:59,827 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 18:09:59,827 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 18:09:59,827 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 18:09:59,827 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 18:09:59,828 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 18:09:59,828 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 18:09:59,828 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 18:09:59,828 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 18:09:59,828 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 18:09:59,828 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 18:09:59,828 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 18:09:59,828 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 18:09:59,828 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 18:09:59,828 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 18:09:59,829 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 18:09:59,829 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 18:09:59,829 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-21 18:09:59,829 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 18:10:00,124 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 18:10:00,141 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 18:10:00,143 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 18:10:00,144 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 18:10:00,147 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 18:10:00,147 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/queue-add-3.wvr.bpl [2021-08-21 18:10:00,147 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/queue-add-3.wvr.bpl' [2021-08-21 18:10:00,179 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 18:10:00,181 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 18:10:00,181 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 18:10:00,182 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 18:10:00,182 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 18:10:00,192 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:10:00" (1/1) ... [2021-08-21 18:10:00,199 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:10:00" (1/1) ... [2021-08-21 18:10:00,206 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 18:10:00,207 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 18:10:00,208 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 18:10:00,208 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 18:10:00,215 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:10:00" (1/1) ... [2021-08-21 18:10:00,216 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:10:00" (1/1) ... [2021-08-21 18:10:00,217 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:10:00" (1/1) ... [2021-08-21 18:10:00,217 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:10:00" (1/1) ... [2021-08-21 18:10:00,219 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:10:00" (1/1) ... [2021-08-21 18:10:00,222 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:10:00" (1/1) ... [2021-08-21 18:10:00,222 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:10:00" (1/1) ... [2021-08-21 18:10:00,223 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 18:10:00,224 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 18:10:00,224 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 18:10:00,224 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 18:10:00,227 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:10:00" (1/1) ... [2021-08-21 18:10:00,231 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 18:10:00,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:00,246 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 18:10:00,267 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 18:10:00,275 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 18:10:00,275 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 18:10:00,275 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 18:10:00,275 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 18:10:00,275 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 18:10:00,275 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 18:10:00,276 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 18:10:00,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 18:10:00,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 18:10:00,276 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-21 18:10:00,276 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-21 18:10:00,276 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-21 18:10:00,277 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 18:10:00,522 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 18:10:00,522 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-21 18:10:00,524 INFO L202 PluginConnector]: Adding new model queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:10:00 BoogieIcfgContainer [2021-08-21 18:10:00,524 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 18:10:00,525 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 18:10:00,525 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 18:10:00,527 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 18:10:00,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:10:00" (1/2) ... [2021-08-21 18:10:00,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16aa87fb and model type queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:10:00, skipping insertion in model container [2021-08-21 18:10:00,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:10:00" (2/2) ... [2021-08-21 18:10:00,528 INFO L111 eAbstractionObserver]: Analyzing ICFG queue-add-3.wvr.bpl [2021-08-21 18:10:00,531 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 18:10:00,531 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 18:10:00,531 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 18:10:00,532 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 18:10:00,594 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-21 18:10:00,655 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 18:10:00,660 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 18:10:00,661 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-21 18:10:00,853 INFO L276 IsEmpty]: Start isEmpty. Operand has 659 states, 525 states have (on average 1.4057142857142857) internal successors, (738), 658 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:00,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 18:10:00,882 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:00,883 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] [2021-08-21 18:10:00,883 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:10:00,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:00,887 INFO L82 PathProgramCache]: Analyzing trace with hash -765207609, now seen corresponding path program 1 times [2021-08-21 18:10:00,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:00,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396266693] [2021-08-21 18:10:00,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:00,897 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:00,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:01,008 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 18:10:01,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:01,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396266693] [2021-08-21 18:10:01,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396266693] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:10:01,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:10:01,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:10:01,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482342306] [2021-08-21 18:10:01,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 18:10:01,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:01,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 18:10:01,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:10:01,025 INFO L87 Difference]: Start difference. First operand has 659 states, 525 states have (on average 1.4057142857142857) internal successors, (738), 658 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:01,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:01,057 INFO L93 Difference]: Finished difference Result 730 states and 816 transitions. [2021-08-21 18:10:01,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 18:10:01,058 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 18:10:01,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:01,064 INFO L225 Difference]: With dead ends: 730 [2021-08-21 18:10:01,064 INFO L226 Difference]: Without dead ends: 32 [2021-08-21 18:10:01,065 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:10:01,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-08-21 18:10:01,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-08-21 18:10:01,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:01,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2021-08-21 18:10:01,108 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 21 [2021-08-21 18:10:01,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:01,108 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2021-08-21 18:10:01,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:01,108 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2021-08-21 18:10:01,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:10:01,110 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:01,110 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, 1, 1] [2021-08-21 18:10:01,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 18:10:01,110 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:10:01,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:01,113 INFO L82 PathProgramCache]: Analyzing trace with hash 198929687, now seen corresponding path program 1 times [2021-08-21 18:10:01,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:01,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565549710] [2021-08-21 18:10:01,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:01,114 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:01,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:01,150 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 18:10:01,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:01,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565549710] [2021-08-21 18:10:01,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565549710] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:10:01,151 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:10:01,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:10:01,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603241836] [2021-08-21 18:10:01,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 18:10:01,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:01,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 18:10:01,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:10:01,153 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:01,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:01,159 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2021-08-21 18:10:01,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 18:10:01,159 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:10:01,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:01,160 INFO L225 Difference]: With dead ends: 33 [2021-08-21 18:10:01,160 INFO L226 Difference]: Without dead ends: 33 [2021-08-21 18:10:01,160 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:10:01,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-08-21 18:10:01,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-08-21 18:10:01,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.09375) internal successors, (35), 32 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 18:10:01,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-08-21 18:10:01,162 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 26 [2021-08-21 18:10:01,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:01,163 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-08-21 18:10:01,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:01,163 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-08-21 18:10:01,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:10:01,163 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:01,163 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, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:01,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 18:10:01,164 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:10:01,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:01,164 INFO L82 PathProgramCache]: Analyzing trace with hash -336484428, now seen corresponding path program 1 times [2021-08-21 18:10:01,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:01,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203885863] [2021-08-21 18:10:01,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:01,164 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:01,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:01,390 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 18:10:01,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:01,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203885863] [2021-08-21 18:10:01,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203885863] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:01,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950718353] [2021-08-21 18:10:01,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:01,391 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:01,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:01,392 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 18:10:01,393 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 18:10:01,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:01,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 18:10:01,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:01,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:10:01,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950718353] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:01,749 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:01,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2021-08-21 18:10:01,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704857120] [2021-08-21 18:10:01,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:10:01,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:01,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:10:01,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:10:01,751 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:02,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:02,099 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2021-08-21 18:10:02,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 18:10:02,099 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 18:10:02,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:02,100 INFO L225 Difference]: With dead ends: 104 [2021-08-21 18:10:02,100 INFO L226 Difference]: Without dead ends: 94 [2021-08-21 18:10:02,101 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 360.1ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 18:10:02,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-08-21 18:10:02,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 51. [2021-08-21 18:10:02,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.1) internal successors, (55), 50 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:02,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2021-08-21 18:10:02,105 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 30 [2021-08-21 18:10:02,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:02,105 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2021-08-21 18:10:02,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:02,105 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2021-08-21 18:10:02,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:10:02,106 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:02,106 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:02,126 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 18:10:02,322 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 18:10:02,323 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:10:02,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:02,324 INFO L82 PathProgramCache]: Analyzing trace with hash 350588639, now seen corresponding path program 1 times [2021-08-21 18:10:02,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:02,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977399264] [2021-08-21 18:10:02,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:02,324 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:02,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:02,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:10:02,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:02,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977399264] [2021-08-21 18:10:02,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977399264] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:02,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397788044] [2021-08-21 18:10:02,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:02,364 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:02,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:02,365 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 18:10:02,366 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 18:10:02,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:02,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:10:02,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:02,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:10:02,518 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:10:02,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397788044] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:02,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:02,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:10:02,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770875160] [2021-08-21 18:10:02,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:10:02,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:02,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:10:02,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:10:02,520 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:02,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:02,558 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2021-08-21 18:10:02,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:10:02,559 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:10:02,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:02,559 INFO L225 Difference]: With dead ends: 58 [2021-08-21 18:10:02,559 INFO L226 Difference]: Without dead ends: 58 [2021-08-21 18:10:02,560 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 19.0ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:10:02,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-08-21 18:10:02,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2021-08-21 18:10:02,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 55 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:02,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2021-08-21 18:10:02,562 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 33 [2021-08-21 18:10:02,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:02,562 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2021-08-21 18:10:02,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:02,563 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2021-08-21 18:10:02,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 18:10:02,563 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:02,563 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, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:02,581 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 18:10:02,780 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 18:10:02,781 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:10:02,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:02,781 INFO L82 PathProgramCache]: Analyzing trace with hash 184503249, now seen corresponding path program 2 times [2021-08-21 18:10:02,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:02,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917482574] [2021-08-21 18:10:02,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:02,781 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:02,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:02,837 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:10:02,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:02,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917482574] [2021-08-21 18:10:02,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917482574] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:02,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403029020] [2021-08-21 18:10:02,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:10:02,838 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:02,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:02,853 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 18:10:02,887 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 18:10:02,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:10:02,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:10:02,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-21 18:10:02,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:03,022 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:10:03,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403029020] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:03,023 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:03,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 4 [2021-08-21 18:10:03,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123389549] [2021-08-21 18:10:03,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:10:03,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:03,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:10:03,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:10:03,024 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 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 18:10:03,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:03,030 INFO L93 Difference]: Finished difference Result 74 states and 78 transitions. [2021-08-21 18:10:03,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 18:10:03,030 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 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 34 [2021-08-21 18:10:03,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:03,031 INFO L225 Difference]: With dead ends: 74 [2021-08-21 18:10:03,031 INFO L226 Difference]: Without dead ends: 65 [2021-08-21 18:10:03,031 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.0ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:10:03,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-08-21 18:10:03,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 61. [2021-08-21 18:10:03,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0833333333333333) internal successors, (65), 60 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:03,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2021-08-21 18:10:03,033 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 34 [2021-08-21 18:10:03,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:03,034 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2021-08-21 18:10:03,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 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 18:10:03,034 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2021-08-21 18:10:03,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 18:10:03,034 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:03,034 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 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 18:10:03,054 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 18:10:03,251 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 18:10:03,252 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:10:03,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:03,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1210412057, now seen corresponding path program 2 times [2021-08-21 18:10:03,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:03,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025765588] [2021-08-21 18:10:03,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:03,252 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:03,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:03,325 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:10:03,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:03,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025765588] [2021-08-21 18:10:03,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025765588] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:03,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412970648] [2021-08-21 18:10:03,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:10:03,326 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:03,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:03,332 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 18:10:03,333 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 18:10:03,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:10:03,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:10:03,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 18:10:03,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:03,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-21 18:10:03,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:10:03,649 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:10:03,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412970648] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:03,649 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:03,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-08-21 18:10:03,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858354228] [2021-08-21 18:10:03,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 18:10:03,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:03,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 18:10:03,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:10:03,650 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:03,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:03,738 INFO L93 Difference]: Finished difference Result 69 states and 73 transitions. [2021-08-21 18:10:03,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 18:10:03,739 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 18:10:03,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:03,739 INFO L225 Difference]: With dead ends: 69 [2021-08-21 18:10:03,739 INFO L226 Difference]: Without dead ends: 69 [2021-08-21 18:10:03,739 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 54.1ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:10:03,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-08-21 18:10:03,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 42. [2021-08-21 18:10:03,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 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 18:10:03,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2021-08-21 18:10:03,741 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 38 [2021-08-21 18:10:03,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:03,742 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2021-08-21 18:10:03,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:03,742 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2021-08-21 18:10:03,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:10:03,742 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:03,742 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:03,759 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-08-21 18:10:03,959 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 18:10:03,959 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:10:03,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:03,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1600806017, now seen corresponding path program 3 times [2021-08-21 18:10:03,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:03,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286973075] [2021-08-21 18:10:03,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:03,960 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:03,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:04,000 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 18:10:04,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:04,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286973075] [2021-08-21 18:10:04,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286973075] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:04,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961537287] [2021-08-21 18:10:04,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:10:04,001 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:04,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:04,002 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 18:10:04,003 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 18:10:04,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:10:04,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:10:04,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-21 18:10:04,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:04,203 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 18:10:04,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961537287] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:10:04,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-21 18:10:04,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-08-21 18:10:04,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348296871] [2021-08-21 18:10:04,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:10:04,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:04,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:10:04,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:10:04,205 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 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 18:10:04,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:04,213 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2021-08-21 18:10:04,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 18:10:04,213 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 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 39 [2021-08-21 18:10:04,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:04,213 INFO L225 Difference]: With dead ends: 59 [2021-08-21 18:10:04,213 INFO L226 Difference]: Without dead ends: 48 [2021-08-21 18:10:04,214 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.5ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:10:04,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-08-21 18:10:04,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2021-08-21 18:10:04,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 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 18:10:04,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2021-08-21 18:10:04,215 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 39 [2021-08-21 18:10:04,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:04,216 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2021-08-21 18:10:04,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 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 18:10:04,216 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2021-08-21 18:10:04,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 18:10:04,216 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:04,216 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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 18:10:04,235 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 18:10:04,433 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 18:10:04,433 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:10:04,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:04,433 INFO L82 PathProgramCache]: Analyzing trace with hash -448768586, now seen corresponding path program 3 times [2021-08-21 18:10:04,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:04,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048530349] [2021-08-21 18:10:04,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:04,434 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:04,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:04,702 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:10:04,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:04,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048530349] [2021-08-21 18:10:04,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048530349] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:04,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756137114] [2021-08-21 18:10:04,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:10:04,703 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:04,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:04,703 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 18:10:04,704 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 18:10:04,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:10:04,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:10:04,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 18:10:04,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:05,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:10:05,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-21 18:10:05,385 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:10:05,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756137114] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:05,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:05,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2021-08-21 18:10:05,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775867609] [2021-08-21 18:10:05,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:10:05,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:05,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:10:05,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:10:05,386 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 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 18:10:05,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:05,628 INFO L93 Difference]: Finished difference Result 83 states and 87 transitions. [2021-08-21 18:10:05,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:10:05,628 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 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) Word has length 42 [2021-08-21 18:10:05,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:05,629 INFO L225 Difference]: With dead ends: 83 [2021-08-21 18:10:05,629 INFO L226 Difference]: Without dead ends: 78 [2021-08-21 18:10:05,629 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 358.1ms TimeCoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-08-21 18:10:05,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-08-21 18:10:05,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 68. [2021-08-21 18:10:05,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 67 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:05,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2021-08-21 18:10:05,632 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 42 [2021-08-21 18:10:05,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:05,632 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2021-08-21 18:10:05,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 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 18:10:05,632 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2021-08-21 18:10:05,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-21 18:10:05,633 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:05,633 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:05,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-21 18:10:05,849 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 18:10:05,849 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:10:05,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:05,850 INFO L82 PathProgramCache]: Analyzing trace with hash -2070686623, now seen corresponding path program 4 times [2021-08-21 18:10:05,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:05,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351775233] [2021-08-21 18:10:05,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:05,850 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:05,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:05,928 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 18:10:05,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:05,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351775233] [2021-08-21 18:10:05,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351775233] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:05,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643722192] [2021-08-21 18:10:05,928 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:10:05,928 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:05,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:05,929 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 18:10:05,930 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 18:10:06,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:10:06,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:10:06,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 18:10:06,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:06,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-21 18:10:06,232 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 18:10:06,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643722192] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:06,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:06,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-08-21 18:10:06,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114050345] [2021-08-21 18:10:06,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:10:06,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:06,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:10:06,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:10:06,234 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:06,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:06,319 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2021-08-21 18:10:06,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 18:10:06,319 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-21 18:10:06,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:06,320 INFO L225 Difference]: With dead ends: 76 [2021-08-21 18:10:06,320 INFO L226 Difference]: Without dead ends: 76 [2021-08-21 18:10:06,320 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 84.8ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:10:06,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-08-21 18:10:06,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2021-08-21 18:10:06,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0694444444444444) internal successors, (77), 72 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:06,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2021-08-21 18:10:06,323 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 45 [2021-08-21 18:10:06,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:06,323 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2021-08-21 18:10:06,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:06,323 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2021-08-21 18:10:06,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-21 18:10:06,323 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:06,323 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 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 18:10:06,343 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 18:10:06,540 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 18:10:06,540 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:10:06,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:06,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1097017555, now seen corresponding path program 5 times [2021-08-21 18:10:06,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:06,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39524450] [2021-08-21 18:10:06,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:06,541 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:06,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:06,592 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:10:06,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:06,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39524450] [2021-08-21 18:10:06,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39524450] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:06,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204627485] [2021-08-21 18:10:06,593 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:10:06,593 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:06,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:06,594 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 18:10:06,594 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 18:10:06,810 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:10:06,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:10:06,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 18:10:06,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:06,932 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:10:06,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204627485] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:06,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:06,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-21 18:10:06,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543437459] [2021-08-21 18:10:06,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:10:06,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:06,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:10:06,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:10:06,933 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:06,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:06,942 INFO L93 Difference]: Finished difference Result 95 states and 99 transitions. [2021-08-21 18:10:06,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:10:06,942 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-08-21 18:10:06,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:06,942 INFO L225 Difference]: With dead ends: 95 [2021-08-21 18:10:06,942 INFO L226 Difference]: Without dead ends: 82 [2021-08-21 18:10:06,943 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 22.0ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:10:06,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-08-21 18:10:06,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2021-08-21 18:10:06,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.0649350649350648) internal successors, (82), 77 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:06,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2021-08-21 18:10:06,945 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 46 [2021-08-21 18:10:06,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:06,946 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2021-08-21 18:10:06,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:06,946 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2021-08-21 18:10:06,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-21 18:10:06,946 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:06,946 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:06,979 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 18:10:07,179 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 18:10:07,181 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:10:07,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:07,182 INFO L82 PathProgramCache]: Analyzing trace with hash -886788623, now seen corresponding path program 6 times [2021-08-21 18:10:07,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:07,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214329372] [2021-08-21 18:10:07,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:07,182 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:07,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:07,280 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 18:10:07,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:07,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214329372] [2021-08-21 18:10:07,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214329372] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:07,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71753019] [2021-08-21 18:10:07,280 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:10:07,281 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:07,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:07,297 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 18:10:07,318 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 18:10:07,515 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 18:10:07,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:10:07,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 18:10:07,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:07,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:10:07,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:10:07,848 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:10:07,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71753019] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:07,848 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:07,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 19 [2021-08-21 18:10:07,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363206528] [2021-08-21 18:10:07,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 18:10:07,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:07,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 18:10:07,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:10:07,849 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand has 20 states, 20 states have (on average 4.5) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:08,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:08,133 INFO L93 Difference]: Finished difference Result 93 states and 97 transitions. [2021-08-21 18:10:08,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 18:10:08,134 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.5) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-08-21 18:10:08,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:08,134 INFO L225 Difference]: With dead ends: 93 [2021-08-21 18:10:08,134 INFO L226 Difference]: Without dead ends: 93 [2021-08-21 18:10:08,135 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 244.6ms TimeCoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:10:08,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-08-21 18:10:08,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 52. [2021-08-21 18:10:08,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 51 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:08,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2021-08-21 18:10:08,137 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 50 [2021-08-21 18:10:08,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:08,137 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2021-08-21 18:10:08,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.5) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:08,137 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2021-08-21 18:10:08,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-21 18:10:08,137 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:08,137 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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 18:10:08,156 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 18:10:08,354 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 18:10:08,355 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:10:08,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:08,355 INFO L82 PathProgramCache]: Analyzing trace with hash 802298329, now seen corresponding path program 7 times [2021-08-21 18:10:08,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:08,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966567198] [2021-08-21 18:10:08,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:08,355 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:08,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:08,391 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-21 18:10:08,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:08,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966567198] [2021-08-21 18:10:08,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966567198] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:08,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803051418] [2021-08-21 18:10:08,391 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:10:08,391 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:08,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:08,392 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 18:10:08,393 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 18:10:08,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:08,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 18:10:08,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:08,759 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-21 18:10:08,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803051418] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:08,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:08,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-21 18:10:08,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746962113] [2021-08-21 18:10:08,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:10:08,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:08,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:10:08,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:10:08,761 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 5 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 18:10:08,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:08,772 INFO L93 Difference]: Finished difference Result 76 states and 79 transitions. [2021-08-21 18:10:08,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:10:08,772 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 5 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 51 [2021-08-21 18:10:08,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:08,772 INFO L225 Difference]: With dead ends: 76 [2021-08-21 18:10:08,772 INFO L226 Difference]: Without dead ends: 60 [2021-08-21 18:10:08,773 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 9.8ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:10:08,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-08-21 18:10:08,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2021-08-21 18:10:08,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 54 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:08,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2021-08-21 18:10:08,774 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 51 [2021-08-21 18:10:08,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:08,775 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2021-08-21 18:10:08,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 5 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 18:10:08,775 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2021-08-21 18:10:08,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-08-21 18:10:08,775 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:08,775 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:08,817 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 18:10:08,992 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 18:10:08,993 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:10:08,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:08,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1889201038, now seen corresponding path program 8 times [2021-08-21 18:10:08,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:08,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367235234] [2021-08-21 18:10:08,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:08,993 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:09,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:09,563 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:10:09,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:09,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367235234] [2021-08-21 18:10:09,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367235234] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:09,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978096505] [2021-08-21 18:10:09,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:10:09,564 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:09,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:09,565 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 18:10:09,566 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 18:10:09,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:10:09,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:10:09,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-08-21 18:10:09,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:10,322 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-21 18:10:10,323 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 37 treesize of output 17 [2021-08-21 18:10:10,705 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-21 18:10:10,705 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 29 treesize of output 13 [2021-08-21 18:10:10,945 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:10:10,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978096505] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:10,946 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:10,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 35 [2021-08-21 18:10:10,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256508780] [2021-08-21 18:10:10,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-21 18:10:10,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:10,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-21 18:10:10,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1163, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 18:10:10,948 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand has 36 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 35 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:11,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:11,605 INFO L93 Difference]: Finished difference Result 104 states and 108 transitions. [2021-08-21 18:10:11,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 18:10:11,606 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 35 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-08-21 18:10:11,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:11,608 INFO L225 Difference]: With dead ends: 104 [2021-08-21 18:10:11,608 INFO L226 Difference]: Without dead ends: 99 [2021-08-21 18:10:11,608 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 1029.2ms TimeCoverageRelationStatistics Valid=158, Invalid=1822, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 18:10:11,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-08-21 18:10:11,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 85. [2021-08-21 18:10:11,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0595238095238095) internal successors, (89), 84 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:11,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2021-08-21 18:10:11,614 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 54 [2021-08-21 18:10:11,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:11,614 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2021-08-21 18:10:11,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 35 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:11,615 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2021-08-21 18:10:11,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 18:10:11,615 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:11,615 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:11,648 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 18:10:11,829 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 18:10:11,829 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:10:11,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:11,830 INFO L82 PathProgramCache]: Analyzing trace with hash 2049360313, now seen corresponding path program 9 times [2021-08-21 18:10:11,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:11,830 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094904772] [2021-08-21 18:10:11,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:11,830 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:11,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:11,954 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-21 18:10:11,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:11,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094904772] [2021-08-21 18:10:11,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094904772] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:11,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022031796] [2021-08-21 18:10:11,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:10:11,955 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:11,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:11,956 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 18:10:11,957 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 18:10:12,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 18:10:12,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:10:12,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 18:10:12,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:12,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:10:12,512 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-21 18:10:12,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022031796] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:12,512 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:12,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-21 18:10:12,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901025252] [2021-08-21 18:10:12,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 18:10:12,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:12,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 18:10:12,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:10:12,513 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 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 18:10:12,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:12,650 INFO L93 Difference]: Finished difference Result 93 states and 97 transitions. [2021-08-21 18:10:12,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 18:10:12,650 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 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 57 [2021-08-21 18:10:12,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:12,651 INFO L225 Difference]: With dead ends: 93 [2021-08-21 18:10:12,651 INFO L226 Difference]: Without dead ends: 93 [2021-08-21 18:10:12,651 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 116.1ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:10:12,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-08-21 18:10:12,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 90. [2021-08-21 18:10:12,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0561797752808988) internal successors, (94), 89 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:12,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2021-08-21 18:10:12,654 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 57 [2021-08-21 18:10:12,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:12,654 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2021-08-21 18:10:12,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 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 18:10:12,654 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2021-08-21 18:10:12,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-08-21 18:10:12,655 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:12,655 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:12,673 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 18:10:12,873 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 18:10:12,873 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:10:12,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:12,873 INFO L82 PathProgramCache]: Analyzing trace with hash -816901461, now seen corresponding path program 10 times [2021-08-21 18:10:12,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:12,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300898260] [2021-08-21 18:10:12,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:12,874 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:12,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:12,915 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 28 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 18:10:12,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:12,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300898260] [2021-08-21 18:10:12,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300898260] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:12,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525975883] [2021-08-21 18:10:12,915 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:10:12,916 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:12,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:12,941 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 18:10:13,012 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 18:10:13,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:10:13,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:10:13,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:10:13,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:13,519 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 28 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 18:10:13,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525975883] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:13,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:13,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-21 18:10:13,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590388189] [2021-08-21 18:10:13,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:10:13,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:13,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:10:13,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:10:13,521 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:13,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:13,530 INFO L93 Difference]: Finished difference Result 116 states and 120 transitions. [2021-08-21 18:10:13,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:10:13,530 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-08-21 18:10:13,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:13,531 INFO L225 Difference]: With dead ends: 116 [2021-08-21 18:10:13,531 INFO L226 Difference]: Without dead ends: 99 [2021-08-21 18:10:13,531 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 13.5ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:10:13,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-08-21 18:10:13,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2021-08-21 18:10:13,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.053191489361702) internal successors, (99), 94 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:13,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2021-08-21 18:10:13,533 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 58 [2021-08-21 18:10:13,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:13,534 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2021-08-21 18:10:13,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:13,534 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2021-08-21 18:10:13,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 18:10:13,534 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:13,534 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:13,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-21 18:10:13,752 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 18:10:13,752 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:10:13,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:13,752 INFO L82 PathProgramCache]: Analyzing trace with hash -502783821, now seen corresponding path program 11 times [2021-08-21 18:10:13,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:13,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844849344] [2021-08-21 18:10:13,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:13,753 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:13,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:14,028 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:10:14,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:14,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844849344] [2021-08-21 18:10:14,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844849344] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:14,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328890003] [2021-08-21 18:10:14,028 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:10:14,028 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:14,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:14,045 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 18:10:14,045 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 18:10:14,458 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 18:10:14,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:10:14,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 18:10:14,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:14,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:10:14,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:10:14,883 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:10:14,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328890003] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:14,884 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:14,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 16 [2021-08-21 18:10:14,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238697226] [2021-08-21 18:10:14,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 18:10:14,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:14,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 18:10:14,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:10:14,886 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:15,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:15,173 INFO L93 Difference]: Finished difference Result 114 states and 119 transitions. [2021-08-21 18:10:15,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:10:15,174 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 18:10:15,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:15,174 INFO L225 Difference]: With dead ends: 114 [2021-08-21 18:10:15,174 INFO L226 Difference]: Without dead ends: 114 [2021-08-21 18:10:15,175 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 57 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 253.1ms TimeCoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:10:15,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-08-21 18:10:15,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 64. [2021-08-21 18:10:15,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 63 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:15,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2021-08-21 18:10:15,176 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 62 [2021-08-21 18:10:15,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:15,177 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2021-08-21 18:10:15,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:15,177 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2021-08-21 18:10:15,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-08-21 18:10:15,177 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:15,177 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:15,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-21 18:10:15,388 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 18:10:15,389 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:10:15,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:15,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1083686117, now seen corresponding path program 12 times [2021-08-21 18:10:15,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:15,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989388254] [2021-08-21 18:10:15,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:15,389 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:15,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:15,428 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 34 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-08-21 18:10:15,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:15,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989388254] [2021-08-21 18:10:15,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989388254] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:15,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929861321] [2021-08-21 18:10:15,429 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:10:15,429 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:15,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:15,429 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 18:10:15,473 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 18:10:15,887 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 18:10:15,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:10:15,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:10:15,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:16,039 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 34 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-08-21 18:10:16,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929861321] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:16,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:16,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-21 18:10:16,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334681304] [2021-08-21 18:10:16,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:10:16,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:16,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:10:16,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:10:16,040 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:16,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:16,053 INFO L93 Difference]: Finished difference Result 93 states and 96 transitions. [2021-08-21 18:10:16,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:10:16,053 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-08-21 18:10:16,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:16,053 INFO L225 Difference]: With dead ends: 93 [2021-08-21 18:10:16,053 INFO L226 Difference]: Without dead ends: 72 [2021-08-21 18:10:16,054 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 13.7ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:10:16,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-08-21 18:10:16,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 67. [2021-08-21 18:10:16,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 66 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 18:10:16,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2021-08-21 18:10:16,055 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 63 [2021-08-21 18:10:16,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:16,055 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2021-08-21 18:10:16,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:16,055 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2021-08-21 18:10:16,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-08-21 18:10:16,056 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:16,056 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:16,075 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 18:10:16,275 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 18:10:16,276 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:10:16,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:16,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1356649136, now seen corresponding path program 13 times [2021-08-21 18:10:16,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:16,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4356975] [2021-08-21 18:10:16,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:16,277 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:16,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:17,355 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:10:17,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:17,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4356975] [2021-08-21 18:10:17,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4356975] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:17,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776027746] [2021-08-21 18:10:17,356 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:10:17,356 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:17,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:17,357 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 18:10:17,402 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 18:10:17,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:17,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 72 conjunts are in the unsatisfiable core [2021-08-21 18:10:17,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:18,810 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-08-21 18:10:18,811 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 51 treesize of output 27 [2021-08-21 18:10:19,422 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-08-21 18:10:19,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 18 [2021-08-21 18:10:19,725 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:10:19,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776027746] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:19,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:19,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 26] total 45 [2021-08-21 18:10:19,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374654300] [2021-08-21 18:10:19,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-08-21 18:10:19,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:19,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-08-21 18:10:19,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1948, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 18:10:19,727 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand has 46 states, 46 states have (on average 2.217391304347826) internal successors, (102), 45 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:21,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:21,073 INFO L93 Difference]: Finished difference Result 125 states and 129 transitions. [2021-08-21 18:10:21,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 18:10:21,074 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.217391304347826) internal successors, (102), 45 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-08-21 18:10:21,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:21,074 INFO L225 Difference]: With dead ends: 125 [2021-08-21 18:10:21,074 INFO L226 Difference]: Without dead ends: 120 [2021-08-21 18:10:21,075 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 46 SyntacticMatches, 7 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 1851.5ms TimeCoverageRelationStatistics Valid=201, Invalid=3105, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 18:10:21,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-08-21 18:10:21,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 102. [2021-08-21 18:10:21,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.0495049504950495) internal successors, (106), 101 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:21,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2021-08-21 18:10:21,077 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 66 [2021-08-21 18:10:21,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:21,077 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2021-08-21 18:10:21,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.217391304347826) internal successors, (102), 45 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:21,078 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2021-08-21 18:10:21,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-08-21 18:10:21,078 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:21,078 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:21,098 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 18:10:21,288 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 18:10:21,289 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:10:21,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:21,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1470110459, now seen corresponding path program 14 times [2021-08-21 18:10:21,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:21,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147051479] [2021-08-21 18:10:21,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:21,290 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:21,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:21,437 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-08-21 18:10:21,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:21,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147051479] [2021-08-21 18:10:21,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147051479] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:21,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115617470] [2021-08-21 18:10:21,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:10:21,437 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:21,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:21,438 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 18:10:21,439 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 18:10:22,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:10:22,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:10:22,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 18:10:22,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:22,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:10:22,280 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-08-21 18:10:22,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115617470] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:22,280 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:22,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-08-21 18:10:22,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292066249] [2021-08-21 18:10:22,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:10:22,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:22,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:10:22,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:10:22,281 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:22,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:22,483 INFO L93 Difference]: Finished difference Result 110 states and 114 transitions. [2021-08-21 18:10:22,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 18:10:22,483 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-08-21 18:10:22,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:22,484 INFO L225 Difference]: With dead ends: 110 [2021-08-21 18:10:22,484 INFO L226 Difference]: Without dead ends: 110 [2021-08-21 18:10:22,484 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 170.5ms TimeCoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:10:22,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-08-21 18:10:22,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2021-08-21 18:10:22,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.0471698113207548) internal successors, (111), 106 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:22,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2021-08-21 18:10:22,486 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 69 [2021-08-21 18:10:22,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:22,486 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2021-08-21 18:10:22,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:22,486 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2021-08-21 18:10:22,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-08-21 18:10:22,486 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:22,486 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:22,504 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 18:10:22,689 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 18:10:22,689 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:10:22,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:22,690 INFO L82 PathProgramCache]: Analyzing trace with hash 679256941, now seen corresponding path program 15 times [2021-08-21 18:10:22,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:22,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45242083] [2021-08-21 18:10:22,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:22,690 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:22,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:22,755 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 45 proven. 34 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-21 18:10:22,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:22,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45242083] [2021-08-21 18:10:22,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45242083] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:22,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395663627] [2021-08-21 18:10:22,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:10:22,756 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:22,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:22,775 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 18:10:22,776 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 18:10:23,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 18:10:23,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:10:23,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 18:10:23,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:23,615 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 45 proven. 34 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-21 18:10:23,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395663627] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:23,616 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:23,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-21 18:10:23,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626845686] [2021-08-21 18:10:23,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:10:23,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:23,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:10:23,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:10:23,617 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:23,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:23,653 INFO L93 Difference]: Finished difference Result 137 states and 141 transitions. [2021-08-21 18:10:23,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:10:23,654 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-08-21 18:10:23,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:23,654 INFO L225 Difference]: With dead ends: 137 [2021-08-21 18:10:23,655 INFO L226 Difference]: Without dead ends: 116 [2021-08-21 18:10:23,656 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:10:23,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-08-21 18:10:23,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 112. [2021-08-21 18:10:23,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.045045045045045) internal successors, (116), 111 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:23,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2021-08-21 18:10:23,659 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 70 [2021-08-21 18:10:23,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:23,659 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2021-08-21 18:10:23,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:23,659 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2021-08-21 18:10:23,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-08-21 18:10:23,659 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:23,659 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:23,680 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 18:10:23,872 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 18:10:23,873 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:10:23,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:23,873 INFO L82 PathProgramCache]: Analyzing trace with hash -251663157, now seen corresponding path program 16 times [2021-08-21 18:10:23,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:23,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701938955] [2021-08-21 18:10:23,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:23,873 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:23,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:23,995 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 1 proven. 82 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-08-21 18:10:23,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:23,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701938955] [2021-08-21 18:10:23,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701938955] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:23,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659781061] [2021-08-21 18:10:23,995 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:10:23,995 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:23,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:23,996 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 18:10:23,998 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 18:10:24,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:10:24,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:10:24,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 18:10:24,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:24,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-08-21 18:10:24,949 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-08-21 18:10:24,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659781061] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:24,950 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:24,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-08-21 18:10:24,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260406596] [2021-08-21 18:10:24,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:10:24,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:24,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:10:24,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:10:24,951 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 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 18:10:25,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:25,148 INFO L93 Difference]: Finished difference Result 132 states and 136 transitions. [2021-08-21 18:10:25,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:10:25,148 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 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) Word has length 74 [2021-08-21 18:10:25,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:25,149 INFO L225 Difference]: With dead ends: 132 [2021-08-21 18:10:25,149 INFO L226 Difference]: Without dead ends: 132 [2021-08-21 18:10:25,149 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 200.6ms TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:10:25,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-08-21 18:10:25,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 76. [2021-08-21 18:10:25,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.04) internal successors, (78), 75 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:25,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2021-08-21 18:10:25,150 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 74 [2021-08-21 18:10:25,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:25,151 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2021-08-21 18:10:25,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 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 18:10:25,151 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2021-08-21 18:10:25,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-21 18:10:25,151 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:25,151 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:25,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-21 18:10:25,369 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 18:10:25,370 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:10:25,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:25,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1490741939, now seen corresponding path program 17 times [2021-08-21 18:10:25,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:25,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023095683] [2021-08-21 18:10:25,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:25,370 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:25,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:25,425 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 55 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-08-21 18:10:25,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:25,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023095683] [2021-08-21 18:10:25,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023095683] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:25,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558748827] [2021-08-21 18:10:25,425 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:10:25,425 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:25,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:25,426 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 18:10:25,493 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 18:10:26,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 18:10:26,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:10:26,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 18:10:26,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:26,294 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 55 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-08-21 18:10:26,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558748827] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:26,295 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:26,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-21 18:10:26,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680060547] [2021-08-21 18:10:26,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:10:26,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:26,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:10:26,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:10:26,295 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand has 8 states, 8 states have (on average 8.25) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:26,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:26,310 INFO L93 Difference]: Finished difference Result 110 states and 113 transitions. [2021-08-21 18:10:26,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:10:26,310 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-21 18:10:26,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:26,310 INFO L225 Difference]: With dead ends: 110 [2021-08-21 18:10:26,311 INFO L226 Difference]: Without dead ends: 84 [2021-08-21 18:10:26,311 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 17.3ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:10:26,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-08-21 18:10:26,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 79. [2021-08-21 18:10:26,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.0384615384615385) internal successors, (81), 78 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:26,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2021-08-21 18:10:26,312 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 75 [2021-08-21 18:10:26,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:26,312 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2021-08-21 18:10:26,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:26,312 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2021-08-21 18:10:26,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-08-21 18:10:26,313 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:26,313 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:26,332 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 18:10:26,531 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 18:10:26,531 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:10:26,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:26,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1498993304, now seen corresponding path program 18 times [2021-08-21 18:10:26,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:26,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53332160] [2021-08-21 18:10:26,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:26,532 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:26,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:27,879 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:10:27,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:27,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53332160] [2021-08-21 18:10:27,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53332160] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:27,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038669097] [2021-08-21 18:10:27,880 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:10:27,880 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:27,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:27,881 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 18:10:27,883 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 18:10:28,572 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 18:10:28,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:10:28,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 86 conjunts are in the unsatisfiable core [2021-08-21 18:10:28,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:29,960 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 18:10:29,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 35 [2021-08-21 18:10:30,980 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 18:10:30,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-21 18:10:31,282 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:10:31,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038669097] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:31,282 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:31,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 32] total 54 [2021-08-21 18:10:31,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465118795] [2021-08-21 18:10:31,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-08-21 18:10:31,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:31,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-08-21 18:10:31,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2827, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 18:10:31,284 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand has 55 states, 55 states have (on average 2.1818181818181817) internal successors, (120), 54 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:32,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:32,929 INFO L93 Difference]: Finished difference Result 145 states and 149 transitions. [2021-08-21 18:10:32,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 18:10:32,929 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.1818181818181817) internal successors, (120), 54 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-08-21 18:10:32,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:32,930 INFO L225 Difference]: With dead ends: 145 [2021-08-21 18:10:32,930 INFO L226 Difference]: Without dead ends: 140 [2021-08-21 18:10:32,931 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 53 SyntacticMatches, 8 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 2692.8ms TimeCoverageRelationStatistics Valid=240, Invalid=4590, Unknown=0, NotChecked=0, Total=4830 [2021-08-21 18:10:32,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-08-21 18:10:32,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 119. [2021-08-21 18:10:32,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.0423728813559323) internal successors, (123), 118 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:32,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 123 transitions. [2021-08-21 18:10:32,933 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 123 transitions. Word has length 78 [2021-08-21 18:10:32,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:32,933 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 123 transitions. [2021-08-21 18:10:32,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.1818181818181817) internal successors, (120), 54 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:32,933 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 123 transitions. [2021-08-21 18:10:32,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-08-21 18:10:32,934 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:32,934 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:32,986 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 18:10:33,152 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 18:10:33,153 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:10:33,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:33,153 INFO L82 PathProgramCache]: Analyzing trace with hash 330166931, now seen corresponding path program 19 times [2021-08-21 18:10:33,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:33,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790091586] [2021-08-21 18:10:33,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:33,154 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:33,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:33,313 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-08-21 18:10:33,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:33,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790091586] [2021-08-21 18:10:33,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790091586] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:33,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642966287] [2021-08-21 18:10:33,313 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:10:33,313 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:33,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:33,314 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 18:10:33,315 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 18:10:34,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:34,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 18:10:34,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:34,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-21 18:10:34,408 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-08-21 18:10:34,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642966287] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:34,409 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:34,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-08-21 18:10:34,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921918071] [2021-08-21 18:10:34,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 18:10:34,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:34,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 18:10:34,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:10:34,410 INFO L87 Difference]: Start difference. First operand 119 states and 123 transitions. Second operand has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:34,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:34,692 INFO L93 Difference]: Finished difference Result 127 states and 131 transitions. [2021-08-21 18:10:34,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 18:10:34,692 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-08-21 18:10:34,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:34,693 INFO L225 Difference]: With dead ends: 127 [2021-08-21 18:10:34,693 INFO L226 Difference]: Without dead ends: 127 [2021-08-21 18:10:34,693 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 260.7ms TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:10:34,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-08-21 18:10:34,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 124. [2021-08-21 18:10:34,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.0406504065040652) internal successors, (128), 123 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:34,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 128 transitions. [2021-08-21 18:10:34,695 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 128 transitions. Word has length 81 [2021-08-21 18:10:34,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:34,695 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 128 transitions. [2021-08-21 18:10:34,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:34,696 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 128 transitions. [2021-08-21 18:10:34,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-08-21 18:10:34,696 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:34,696 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:34,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-21 18:10:34,914 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 18:10:34,915 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:10:34,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:34,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1085089915, now seen corresponding path program 20 times [2021-08-21 18:10:34,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:34,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017451661] [2021-08-21 18:10:34,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:34,915 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:34,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:34,970 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-08-21 18:10:34,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:34,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017451661] [2021-08-21 18:10:34,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017451661] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:34,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185866481] [2021-08-21 18:10:34,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:10:34,970 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:34,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:34,971 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 18:10:34,972 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 18:10:35,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:10:35,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:10:35,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 18:10:35,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:36,122 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-08-21 18:10:36,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185866481] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:36,123 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:36,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-21 18:10:36,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133756008] [2021-08-21 18:10:36,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 18:10:36,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:36,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 18:10:36,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:10:36,124 INFO L87 Difference]: Start difference. First operand 124 states and 128 transitions. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:36,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:36,137 INFO L93 Difference]: Finished difference Result 158 states and 162 transitions. [2021-08-21 18:10:36,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:10:36,137 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-08-21 18:10:36,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:36,144 INFO L225 Difference]: With dead ends: 158 [2021-08-21 18:10:36,144 INFO L226 Difference]: Without dead ends: 133 [2021-08-21 18:10:36,144 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 22.5ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:10:36,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-08-21 18:10:36,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 129. [2021-08-21 18:10:36,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.0390625) internal successors, (133), 128 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:36,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 133 transitions. [2021-08-21 18:10:36,146 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 133 transitions. Word has length 82 [2021-08-21 18:10:36,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:36,146 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 133 transitions. [2021-08-21 18:10:36,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:36,146 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 133 transitions. [2021-08-21 18:10:36,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-08-21 18:10:36,146 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:36,146 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:36,165 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 18:10:36,365 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 18:10:36,365 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:10:36,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:36,365 INFO L82 PathProgramCache]: Analyzing trace with hash -738516147, now seen corresponding path program 21 times [2021-08-21 18:10:36,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:36,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714547095] [2021-08-21 18:10:36,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:36,367 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:36,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:36,857 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:10:36,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:36,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714547095] [2021-08-21 18:10:36,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714547095] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:36,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448697386] [2021-08-21 18:10:36,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:10:36,858 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:36,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:36,873 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 18:10:36,901 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 18:10:37,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 18:10:37,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:10:37,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-21 18:10:37,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:38,631 INFO L354 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2021-08-21 18:10:38,632 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 23 treesize of output 20 [2021-08-21 18:10:38,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-21 18:10:38,902 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:10:38,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448697386] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:38,903 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:38,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 39 [2021-08-21 18:10:38,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691180783] [2021-08-21 18:10:38,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 18:10:38,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:38,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 18:10:38,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1467, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:10:38,904 INFO L87 Difference]: Start difference. First operand 129 states and 133 transitions. Second operand has 40 states, 40 states have (on average 3.575) internal successors, (143), 39 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 18:10:39,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:39,555 INFO L93 Difference]: Finished difference Result 152 states and 156 transitions. [2021-08-21 18:10:39,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 18:10:39,556 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.575) internal successors, (143), 39 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) Word has length 86 [2021-08-21 18:10:39,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:39,557 INFO L225 Difference]: With dead ends: 152 [2021-08-21 18:10:39,557 INFO L226 Difference]: Without dead ends: 152 [2021-08-21 18:10:39,557 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 989.9ms TimeCoverageRelationStatistics Valid=134, Invalid=2122, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 18:10:39,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-08-21 18:10:39,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 88. [2021-08-21 18:10:39,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.0344827586206897) internal successors, (90), 87 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:39,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2021-08-21 18:10:39,559 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 86 [2021-08-21 18:10:39,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:39,559 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2021-08-21 18:10:39,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.575) internal successors, (143), 39 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 18:10:39,559 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2021-08-21 18:10:39,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-08-21 18:10:39,560 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:39,560 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:39,588 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 18:10:39,760 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 18:10:39,760 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:10:39,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:39,761 INFO L82 PathProgramCache]: Analyzing trace with hash 774010805, now seen corresponding path program 22 times [2021-08-21 18:10:39,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:39,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741635229] [2021-08-21 18:10:39,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:39,761 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:39,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:39,815 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 81 proven. 22 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-08-21 18:10:39,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:39,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741635229] [2021-08-21 18:10:39,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741635229] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:39,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103475386] [2021-08-21 18:10:39,818 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:10:39,818 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:39,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:39,820 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 18:10:39,821 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 18:10:40,824 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:10:40,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:10:40,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 18:10:40,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:40,996 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 81 proven. 22 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-08-21 18:10:40,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103475386] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:40,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:40,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-21 18:10:40,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676499375] [2021-08-21 18:10:40,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 18:10:40,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:40,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 18:10:40,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:10:40,998 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:41,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:41,045 INFO L93 Difference]: Finished difference Result 127 states and 130 transitions. [2021-08-21 18:10:41,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:10:41,046 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-08-21 18:10:41,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:41,046 INFO L225 Difference]: With dead ends: 127 [2021-08-21 18:10:41,046 INFO L226 Difference]: Without dead ends: 96 [2021-08-21 18:10:41,046 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 22.0ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:10:41,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-08-21 18:10:41,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 91. [2021-08-21 18:10:41,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.0333333333333334) internal successors, (93), 90 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:41,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2021-08-21 18:10:41,048 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 87 [2021-08-21 18:10:41,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:41,048 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2021-08-21 18:10:41,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:41,048 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2021-08-21 18:10:41,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-08-21 18:10:41,048 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:41,049 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:41,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-08-21 18:10:41,268 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 18:10:41,269 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:10:41,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:41,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1807789334, now seen corresponding path program 23 times [2021-08-21 18:10:41,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:41,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009114024] [2021-08-21 18:10:41,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:41,269 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:41,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:43,278 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 179 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:10:43,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:43,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009114024] [2021-08-21 18:10:43,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009114024] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:43,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933404981] [2021-08-21 18:10:43,278 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:10:43,278 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:43,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:43,279 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 18:10:43,281 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 18:10:44,283 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 18:10:44,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:10:44,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 106 conjunts are in the unsatisfiable core [2021-08-21 18:10:44,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:46,001 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-21 18:10:46,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 81 treesize of output 45 [2021-08-21 18:10:47,220 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-21 18:10:47,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 26 [2021-08-21 18:10:47,594 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 179 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:10:47,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933404981] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:47,594 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:47,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 38] total 65 [2021-08-21 18:10:47,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344774342] [2021-08-21 18:10:47,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-08-21 18:10:47,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:47,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-08-21 18:10:47,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=4119, Unknown=0, NotChecked=0, Total=4290 [2021-08-21 18:10:47,596 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand has 66 states, 66 states have (on average 2.1363636363636362) internal successors, (141), 65 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:49,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:49,626 INFO L93 Difference]: Finished difference Result 166 states and 170 transitions. [2021-08-21 18:10:49,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 18:10:49,626 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.1363636363636362) internal successors, (141), 65 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-08-21 18:10:49,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:49,627 INFO L225 Difference]: With dead ends: 166 [2021-08-21 18:10:49,627 INFO L226 Difference]: Without dead ends: 161 [2021-08-21 18:10:49,628 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 60 SyntacticMatches, 9 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1287 ImplicationChecksByTransitivity, 3614.8ms TimeCoverageRelationStatistics Valid=287, Invalid=6685, Unknown=0, NotChecked=0, Total=6972 [2021-08-21 18:10:49,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-08-21 18:10:49,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 136. [2021-08-21 18:10:49,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.037037037037037) internal successors, (140), 135 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:49,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 140 transitions. [2021-08-21 18:10:49,631 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 140 transitions. Word has length 90 [2021-08-21 18:10:49,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:49,632 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 140 transitions. [2021-08-21 18:10:49,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.1363636363636362) internal successors, (141), 65 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:49,632 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 140 transitions. [2021-08-21 18:10:49,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-08-21 18:10:49,632 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:49,632 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:49,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-21 18:10:49,851 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 18:10:49,851 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:10:49,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:49,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1941393515, now seen corresponding path program 24 times [2021-08-21 18:10:49,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:49,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503590704] [2021-08-21 18:10:49,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:49,852 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:49,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:49,992 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-08-21 18:10:49,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:49,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503590704] [2021-08-21 18:10:49,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503590704] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:49,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966645812] [2021-08-21 18:10:49,993 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:10:49,993 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:49,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:49,994 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 18:10:49,996 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 18:10:51,357 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 18:10:51,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:10:51,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 18:10:51,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:51,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:10:51,643 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-08-21 18:10:51,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966645812] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:51,643 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:51,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-08-21 18:10:51,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480393037] [2021-08-21 18:10:51,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:10:51,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:51,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:10:51,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:10:51,644 INFO L87 Difference]: Start difference. First operand 136 states and 140 transitions. Second operand has 16 states, 16 states have (on average 4.5625) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:51,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:51,968 INFO L93 Difference]: Finished difference Result 144 states and 148 transitions. [2021-08-21 18:10:51,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 18:10:51,968 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.5625) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-08-21 18:10:51,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:51,968 INFO L225 Difference]: With dead ends: 144 [2021-08-21 18:10:51,968 INFO L226 Difference]: Without dead ends: 144 [2021-08-21 18:10:51,969 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 288.1ms TimeCoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:10:51,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-08-21 18:10:51,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 141. [2021-08-21 18:10:51,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.0357142857142858) internal successors, (145), 140 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:51,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 145 transitions. [2021-08-21 18:10:51,971 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 145 transitions. Word has length 93 [2021-08-21 18:10:51,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:51,971 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 145 transitions. [2021-08-21 18:10:51,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.5625) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:51,971 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 145 transitions. [2021-08-21 18:10:51,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-08-21 18:10:51,971 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:51,971 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:52,011 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 18:10:52,172 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 18:10:52,172 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:10:52,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:52,172 INFO L82 PathProgramCache]: Analyzing trace with hash 829975559, now seen corresponding path program 25 times [2021-08-21 18:10:52,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:52,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575456036] [2021-08-21 18:10:52,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:52,173 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:52,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:52,235 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 91 proven. 81 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-08-21 18:10:52,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:52,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575456036] [2021-08-21 18:10:52,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575456036] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:52,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554927240] [2021-08-21 18:10:52,236 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:10:52,236 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:52,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:52,237 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 18:10:52,255 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 18:10:53,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:53,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 18:10:53,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:53,757 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 91 proven. 81 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-08-21 18:10:53,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554927240] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:53,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:53,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 18:10:53,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509045760] [2021-08-21 18:10:53,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 18:10:53,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:53,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 18:10:53,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:10:53,758 INFO L87 Difference]: Start difference. First operand 141 states and 145 transitions. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 9 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 18:10:53,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:53,773 INFO L93 Difference]: Finished difference Result 179 states and 183 transitions. [2021-08-21 18:10:53,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 18:10:53,773 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 9 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) Word has length 94 [2021-08-21 18:10:53,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:53,774 INFO L225 Difference]: With dead ends: 179 [2021-08-21 18:10:53,774 INFO L226 Difference]: Without dead ends: 150 [2021-08-21 18:10:53,774 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 27.7ms TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:10:53,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-08-21 18:10:53,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 146. [2021-08-21 18:10:53,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.0344827586206897) internal successors, (150), 145 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:53,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 150 transitions. [2021-08-21 18:10:53,776 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 150 transitions. Word has length 94 [2021-08-21 18:10:53,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:53,776 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 150 transitions. [2021-08-21 18:10:53,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 9 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 18:10:53,776 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 150 transitions. [2021-08-21 18:10:53,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-08-21 18:10:53,777 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:53,777 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:53,796 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 18:10:53,996 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 18:10:53,996 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:10:53,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:53,997 INFO L82 PathProgramCache]: Analyzing trace with hash -463394395, now seen corresponding path program 26 times [2021-08-21 18:10:53,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:53,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096428592] [2021-08-21 18:10:53,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:53,997 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:54,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:54,622 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 226 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:10:54,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:54,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096428592] [2021-08-21 18:10:54,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096428592] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:54,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312196651] [2021-08-21 18:10:54,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:10:54,622 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:54,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:54,631 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 18:10:54,631 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 18:10:55,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:10:55,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:10:55,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 56 conjunts are in the unsatisfiable core [2021-08-21 18:10:55,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:56,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-21 18:10:56,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:10:56,520 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 226 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:10:56,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312196651] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:56,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:56,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2021-08-21 18:10:56,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372932352] [2021-08-21 18:10:56,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 18:10:56,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:56,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 18:10:56,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2021-08-21 18:10:56,521 INFO L87 Difference]: Start difference. First operand 146 states and 150 transitions. Second operand has 28 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 27 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:57,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:57,090 INFO L93 Difference]: Finished difference Result 173 states and 177 transitions. [2021-08-21 18:10:57,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 18:10:57,091 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 27 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-08-21 18:10:57,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:57,091 INFO L225 Difference]: With dead ends: 173 [2021-08-21 18:10:57,092 INFO L226 Difference]: Without dead ends: 173 [2021-08-21 18:10:57,092 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 94 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 578.9ms TimeCoverageRelationStatistics Valid=89, Invalid=1243, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 18:10:57,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-08-21 18:10:57,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 100. [2021-08-21 18:10:57,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.0303030303030303) internal successors, (102), 99 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:57,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2021-08-21 18:10:57,094 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 98 [2021-08-21 18:10:57,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:57,094 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2021-08-21 18:10:57,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 27 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:57,094 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2021-08-21 18:10:57,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-08-21 18:10:57,094 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:57,094 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:57,129 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 18:10:57,295 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 18:10:57,295 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:10:57,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:57,295 INFO L82 PathProgramCache]: Analyzing trace with hash -952256115, now seen corresponding path program 27 times [2021-08-21 18:10:57,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:57,295 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466959303] [2021-08-21 18:10:57,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:57,296 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:57,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:57,379 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 112 proven. 35 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-08-21 18:10:57,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:57,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466959303] [2021-08-21 18:10:57,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466959303] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:57,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743397299] [2021-08-21 18:10:57,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:10:57,379 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:57,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:57,380 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 18:10:57,411 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 18:10:58,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-21 18:10:58,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:10:58,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 18:10:58,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:58,953 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 112 proven. 35 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-08-21 18:10:58,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743397299] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:58,953 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:58,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 18:10:58,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717925092] [2021-08-21 18:10:58,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 18:10:58,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:58,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 18:10:58,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:10:58,954 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand has 10 states, 10 states have (on average 8.2) internal successors, (82), 9 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:58,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:58,974 INFO L93 Difference]: Finished difference Result 144 states and 147 transitions. [2021-08-21 18:10:58,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 18:10:58,974 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.2) internal successors, (82), 9 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-08-21 18:10:58,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:58,975 INFO L225 Difference]: With dead ends: 144 [2021-08-21 18:10:58,975 INFO L226 Difference]: Without dead ends: 108 [2021-08-21 18:10:58,975 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 27.9ms TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:10:58,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-08-21 18:10:58,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 103. [2021-08-21 18:10:58,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.0294117647058822) internal successors, (105), 102 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:58,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2021-08-21 18:10:58,976 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 99 [2021-08-21 18:10:58,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:58,976 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2021-08-21 18:10:58,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.2) internal successors, (82), 9 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:58,977 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2021-08-21 18:10:58,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-08-21 18:10:58,977 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:58,977 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:58,998 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 18:10:59,197 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 18:10:59,198 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:10:59,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:59,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1527409986, now seen corresponding path program 28 times [2021-08-21 18:10:59,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:59,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047078141] [2021-08-21 18:10:59,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:59,198 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:59,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:11:01,876 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 251 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:11:01,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:11:01,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047078141] [2021-08-21 18:11:01,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047078141] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:01,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955349303] [2021-08-21 18:11:01,877 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:11:01,877 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:01,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:11:01,878 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 18:11:01,939 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 18:11:03,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:11:03,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:11:03,336 WARN L261 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 130 conjunts are in the unsatisfiable core [2021-08-21 18:11:03,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:11:06,139 INFO L354 Elim1Store]: treesize reduction 180, result has 0.6 percent of original size [2021-08-21 18:11:06,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 103 treesize of output 55 [2021-08-21 18:11:07,815 INFO L354 Elim1Store]: treesize reduction 180, result has 0.6 percent of original size [2021-08-21 18:11:07,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 30 [2021-08-21 18:11:08,213 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 251 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:11:08,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955349303] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:08,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:11:08,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 44] total 76 [2021-08-21 18:11:08,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178072146] [2021-08-21 18:11:08,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-08-21 18:11:08,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:11:08,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-08-21 18:11:08,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=5653, Unknown=0, NotChecked=0, Total=5852 [2021-08-21 18:11:08,216 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand has 77 states, 77 states have (on average 2.103896103896104) internal successors, (162), 76 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:11,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:11:11,062 INFO L93 Difference]: Finished difference Result 187 states and 191 transitions. [2021-08-21 18:11:11,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-21 18:11:11,063 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.103896103896104) internal successors, (162), 76 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2021-08-21 18:11:11,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:11:11,063 INFO L225 Difference]: With dead ends: 187 [2021-08-21 18:11:11,063 INFO L226 Difference]: Without dead ends: 182 [2021-08-21 18:11:11,065 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 67 SyntacticMatches, 10 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1749 ImplicationChecksByTransitivity, 5201.7ms TimeCoverageRelationStatistics Valid=334, Invalid=9172, Unknown=0, NotChecked=0, Total=9506 [2021-08-21 18:11:11,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-08-21 18:11:11,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 153. [2021-08-21 18:11:11,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.0328947368421053) internal successors, (157), 152 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:11,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 157 transitions. [2021-08-21 18:11:11,070 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 157 transitions. Word has length 102 [2021-08-21 18:11:11,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:11:11,070 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 157 transitions. [2021-08-21 18:11:11,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.103896103896104) internal successors, (162), 76 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:11,070 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 157 transitions. [2021-08-21 18:11:11,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-08-21 18:11:11,070 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:11:11,070 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:11:11,092 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 18:11:11,286 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 18:11:11,286 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:11:11,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:11:11,286 INFO L82 PathProgramCache]: Analyzing trace with hash -177266323, now seen corresponding path program 29 times [2021-08-21 18:11:11,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:11:11,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389051168] [2021-08-21 18:11:11,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:11:11,287 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:11:11,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:11:11,492 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-08-21 18:11:11,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:11:11,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389051168] [2021-08-21 18:11:11,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389051168] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:11,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108139184] [2021-08-21 18:11:11,492 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:11:11,492 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:11,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:11:11,493 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 18:11:11,494 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 18:11:13,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-21 18:11:13,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:11:13,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 18:11:13,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:11:13,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:11:13,559 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-08-21 18:11:13,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108139184] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:13,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:11:13,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-08-21 18:11:13,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255736395] [2021-08-21 18:11:13,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:11:13,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:11:13,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:11:13,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:11:13,560 INFO L87 Difference]: Start difference. First operand 153 states and 157 transitions. Second operand has 18 states, 18 states have (on average 4.5) internal successors, (81), 17 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:13,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:11:13,993 INFO L93 Difference]: Finished difference Result 161 states and 165 transitions. [2021-08-21 18:11:13,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 18:11:13,996 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.5) internal successors, (81), 17 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-08-21 18:11:13,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:11:13,997 INFO L225 Difference]: With dead ends: 161 [2021-08-21 18:11:13,997 INFO L226 Difference]: Without dead ends: 161 [2021-08-21 18:11:13,998 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 432.0ms TimeCoverageRelationStatistics Valid=186, Invalid=1004, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 18:11:13,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-08-21 18:11:13,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 158. [2021-08-21 18:11:14,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.0318471337579618) internal successors, (162), 157 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:14,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 162 transitions. [2021-08-21 18:11:14,000 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 162 transitions. Word has length 105 [2021-08-21 18:11:14,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:11:14,000 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 162 transitions. [2021-08-21 18:11:14,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.5) internal successors, (81), 17 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:14,000 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 162 transitions. [2021-08-21 18:11:14,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-08-21 18:11:14,000 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:11:14,001 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:11:14,023 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 18:11:14,216 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 18:11:14,217 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:11:14,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:11:14,217 INFO L82 PathProgramCache]: Analyzing trace with hash 234789471, now seen corresponding path program 30 times [2021-08-21 18:11:14,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:11:14,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794804560] [2021-08-21 18:11:14,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:11:14,217 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:11:14,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:11:14,348 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 120 proven. 112 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-08-21 18:11:14,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:11:14,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794804560] [2021-08-21 18:11:14,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794804560] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:14,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259503511] [2021-08-21 18:11:14,348 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:11:14,348 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:14,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:11:14,349 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 18:11:14,350 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 18:11:16,146 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-08-21 18:11:16,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:11:16,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 18:11:16,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:11:16,388 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 120 proven. 112 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-08-21 18:11:16,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259503511] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:16,389 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:11:16,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 18:11:16,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903035808] [2021-08-21 18:11:16,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 18:11:16,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:11:16,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 18:11:16,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:11:16,390 INFO L87 Difference]: Start difference. First operand 158 states and 162 transitions. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:16,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:11:16,407 INFO L93 Difference]: Finished difference Result 200 states and 204 transitions. [2021-08-21 18:11:16,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 18:11:16,407 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-08-21 18:11:16,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:11:16,408 INFO L225 Difference]: With dead ends: 200 [2021-08-21 18:11:16,408 INFO L226 Difference]: Without dead ends: 167 [2021-08-21 18:11:16,408 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 37.4ms TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:11:16,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-08-21 18:11:16,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 163. [2021-08-21 18:11:16,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.0308641975308641) internal successors, (167), 162 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:16,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 167 transitions. [2021-08-21 18:11:16,410 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 167 transitions. Word has length 106 [2021-08-21 18:11:16,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:11:16,410 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 167 transitions. [2021-08-21 18:11:16,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:16,410 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 167 transitions. [2021-08-21 18:11:16,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-08-21 18:11:16,411 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:11:16,411 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:11:16,446 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 18:11:16,626 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 18:11:16,627 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:11:16,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:11:16,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1740737561, now seen corresponding path program 31 times [2021-08-21 18:11:16,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:11:16,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608258979] [2021-08-21 18:11:16,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:11:16,628 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:11:16,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:11:16,933 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 1 proven. 238 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-08-21 18:11:16,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:11:16,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608258979] [2021-08-21 18:11:16,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608258979] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:16,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887074553] [2021-08-21 18:11:16,934 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:11:16,934 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:16,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:11:16,935 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 18:11:16,935 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 18:11:18,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:11:18,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 18:11:18,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:11:19,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-08-21 18:11:19,169 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 0 proven. 239 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-08-21 18:11:19,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887074553] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:19,169 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:11:19,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-08-21 18:11:19,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904467405] [2021-08-21 18:11:19,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 18:11:19,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:11:19,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 18:11:19,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:11:19,170 INFO L87 Difference]: Start difference. First operand 163 states and 167 transitions. Second operand has 21 states, 21 states have (on average 4.476190476190476) internal successors, (94), 20 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:19,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:11:19,580 INFO L93 Difference]: Finished difference Result 195 states and 199 transitions. [2021-08-21 18:11:19,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 18:11:19,580 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.476190476190476) internal successors, (94), 20 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-08-21 18:11:19,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:11:19,581 INFO L225 Difference]: With dead ends: 195 [2021-08-21 18:11:19,581 INFO L226 Difference]: Without dead ends: 195 [2021-08-21 18:11:19,581 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 106 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 431.0ms TimeCoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:11:19,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-08-21 18:11:19,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 112. [2021-08-21 18:11:19,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.027027027027027) internal successors, (114), 111 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:19,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2021-08-21 18:11:19,583 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 110 [2021-08-21 18:11:19,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:11:19,583 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2021-08-21 18:11:19,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.476190476190476) internal successors, (94), 20 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:19,583 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2021-08-21 18:11:19,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-08-21 18:11:19,583 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:11:19,584 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:11:19,604 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 18:11:19,801 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 18:11:19,801 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:11:19,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:11:19,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1826159183, now seen corresponding path program 32 times [2021-08-21 18:11:19,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:11:19,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156166520] [2021-08-21 18:11:19,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:11:19,802 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:11:19,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:11:19,874 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 148 proven. 51 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-08-21 18:11:19,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:11:19,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156166520] [2021-08-21 18:11:19,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156166520] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:19,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944735969] [2021-08-21 18:11:19,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:11:19,875 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:19,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:11:19,901 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 18:11:19,929 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 18:11:21,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:11:21,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:11:21,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 18:11:21,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:11:22,034 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 148 proven. 51 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-08-21 18:11:22,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944735969] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:22,034 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:11:22,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 18:11:22,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424110038] [2021-08-21 18:11:22,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 18:11:22,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:11:22,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 18:11:22,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:11:22,035 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand has 11 states, 11 states have (on average 8.181818181818182) internal successors, (90), 10 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:22,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:11:22,058 INFO L93 Difference]: Finished difference Result 161 states and 164 transitions. [2021-08-21 18:11:22,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 18:11:22,059 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 8.181818181818182) internal successors, (90), 10 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-08-21 18:11:22,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:11:22,059 INFO L225 Difference]: With dead ends: 161 [2021-08-21 18:11:22,059 INFO L226 Difference]: Without dead ends: 120 [2021-08-21 18:11:22,059 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 33.4ms TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:11:22,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-08-21 18:11:22,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 115. [2021-08-21 18:11:22,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.0263157894736843) internal successors, (117), 114 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:22,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2021-08-21 18:11:22,061 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 111 [2021-08-21 18:11:22,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:11:22,061 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2021-08-21 18:11:22,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.181818181818182) internal successors, (90), 10 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:22,061 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2021-08-21 18:11:22,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-08-21 18:11:22,061 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:11:22,061 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:11:22,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-21 18:11:22,283 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 18:11:22,283 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:11:22,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:11:22,283 INFO L82 PathProgramCache]: Analyzing trace with hash -288045436, now seen corresponding path program 33 times [2021-08-21 18:11:22,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:11:22,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213659226] [2021-08-21 18:11:22,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:11:22,283 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:11:22,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:11:25,898 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:11:25,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:11:25,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213659226] [2021-08-21 18:11:25,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213659226] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:25,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306133449] [2021-08-21 18:11:25,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:11:25,899 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:25,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:11:25,899 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 18:11:25,900 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 18:11:27,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-08-21 18:11:27,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:11:27,782 WARN L261 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 155 conjunts are in the unsatisfiable core [2021-08-21 18:11:27,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:11:31,390 INFO L354 Elim1Store]: treesize reduction 240, result has 0.4 percent of original size [2021-08-21 18:11:31,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 117 treesize of output 65 [2021-08-21 18:11:34,899 INFO L354 Elim1Store]: treesize reduction 320, result has 0.9 percent of original size [2021-08-21 18:11:34,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 103 treesize of output 52 [2021-08-21 18:11:35,354 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:35,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306133449] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:35,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:11:35,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 52] total 91 [2021-08-21 18:11:35,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438207332] [2021-08-21 18:11:35,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-08-21 18:11:35,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:11:35,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-08-21 18:11:35,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=8127, Unknown=0, NotChecked=0, Total=8372 [2021-08-21 18:11:35,356 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand has 92 states, 92 states have (on average 2.130434782608696) internal successors, (196), 91 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:40,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:11:40,677 INFO L93 Difference]: Finished difference Result 249 states and 254 transitions. [2021-08-21 18:11:40,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-08-21 18:11:40,677 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.130434782608696) internal successors, (196), 91 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-08-21 18:11:40,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:11:40,678 INFO L225 Difference]: With dead ends: 249 [2021-08-21 18:11:40,678 INFO L226 Difference]: Without dead ends: 244 [2021-08-21 18:11:40,679 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 71 SyntacticMatches, 10 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3534 ImplicationChecksByTransitivity, 8794.4ms TimeCoverageRelationStatistics Valid=517, Invalid=16513, Unknown=0, NotChecked=0, Total=17030 [2021-08-21 18:11:40,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-08-21 18:11:40,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 170. [2021-08-21 18:11:40,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.029585798816568) internal successors, (174), 169 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:40,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 174 transitions. [2021-08-21 18:11:40,682 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 174 transitions. Word has length 114 [2021-08-21 18:11:40,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:11:40,682 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 174 transitions. [2021-08-21 18:11:40,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.130434782608696) internal successors, (196), 91 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:40,682 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 174 transitions. [2021-08-21 18:11:40,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-08-21 18:11:40,682 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:11:40,682 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:11:40,709 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 18:11:40,883 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 18:11:40,883 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:11:40,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:11:40,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1137545775, now seen corresponding path program 34 times [2021-08-21 18:11:40,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:11:40,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719578493] [2021-08-21 18:11:40,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:11:40,884 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:11:40,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:11:41,260 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-08-21 18:11:41,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:11:41,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719578493] [2021-08-21 18:11:41,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719578493] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:41,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950194190] [2021-08-21 18:11:41,261 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:11:41,261 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:41,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:11:41,285 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 18:11:41,312 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 18:11:43,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:11:43,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:11:43,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-21 18:11:43,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:11:43,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:11:44,017 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-08-21 18:11:44,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950194190] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:44,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:11:44,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-08-21 18:11:44,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670748945] [2021-08-21 18:11:44,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 18:11:44,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:11:44,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 18:11:44,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:11:44,019 INFO L87 Difference]: Start difference. First operand 170 states and 174 transitions. Second operand has 20 states, 20 states have (on average 4.45) internal successors, (89), 19 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:44,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:11:44,535 INFO L93 Difference]: Finished difference Result 178 states and 182 transitions. [2021-08-21 18:11:44,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 18:11:44,535 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.45) internal successors, (89), 19 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-08-21 18:11:44,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:11:44,536 INFO L225 Difference]: With dead ends: 178 [2021-08-21 18:11:44,536 INFO L226 Difference]: Without dead ends: 178 [2021-08-21 18:11:44,536 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 115 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 566.5ms TimeCoverageRelationStatistics Valid=222, Invalid=1260, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 18:11:44,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-08-21 18:11:44,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 175. [2021-08-21 18:11:44,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.028735632183908) internal successors, (179), 174 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:44,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 179 transitions. [2021-08-21 18:11:44,538 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 179 transitions. Word has length 117 [2021-08-21 18:11:44,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:11:44,538 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 179 transitions. [2021-08-21 18:11:44,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.45) internal successors, (89), 19 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:44,538 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 179 transitions. [2021-08-21 18:11:44,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-08-21 18:11:44,539 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:11:44,539 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:11:44,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-21 18:11:44,739 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 18:11:44,739 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:11:44,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:11:44,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1768521055, now seen corresponding path program 35 times [2021-08-21 18:11:44,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:11:44,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951191082] [2021-08-21 18:11:44,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:11:44,740 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:11:44,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:11:44,828 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 153 proven. 148 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-08-21 18:11:44,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:11:44,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951191082] [2021-08-21 18:11:44,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951191082] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:44,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627580828] [2021-08-21 18:11:44,828 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:11:44,828 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:44,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:11:44,829 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 18:11:44,830 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 18:11:47,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-08-21 18:11:47,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:11:47,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 18:11:47,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:11:47,566 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 153 proven. 148 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-08-21 18:11:47,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627580828] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:47,566 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:11:47,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 18:11:47,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561267158] [2021-08-21 18:11:47,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:11:47,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:11:47,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:11:47,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:11:47,567 INFO L87 Difference]: Start difference. First operand 175 states and 179 transitions. Second operand has 12 states, 12 states have (on average 9.666666666666666) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:47,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:11:47,589 INFO L93 Difference]: Finished difference Result 221 states and 225 transitions. [2021-08-21 18:11:47,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 18:11:47,589 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 9.666666666666666) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2021-08-21 18:11:47,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:11:47,590 INFO L225 Difference]: With dead ends: 221 [2021-08-21 18:11:47,590 INFO L226 Difference]: Without dead ends: 184 [2021-08-21 18:11:47,590 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 40.6ms TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:11:47,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-08-21 18:11:47,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 180. [2021-08-21 18:11:47,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.0279329608938548) internal successors, (184), 179 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:47,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 184 transitions. [2021-08-21 18:11:47,592 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 184 transitions. Word has length 118 [2021-08-21 18:11:47,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:11:47,592 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 184 transitions. [2021-08-21 18:11:47,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.666666666666666) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:47,592 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 184 transitions. [2021-08-21 18:11:47,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-08-21 18:11:47,593 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:11:47,593 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:11:47,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-08-21 18:11:47,808 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 18:11:47,808 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:11:47,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:11:47,808 INFO L82 PathProgramCache]: Analyzing trace with hash -2017696641, now seen corresponding path program 36 times [2021-08-21 18:11:47,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:11:47,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390549327] [2021-08-21 18:11:47,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:11:47,808 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:11:47,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:11:48,231 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 1 proven. 308 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-08-21 18:11:48,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:11:48,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390549327] [2021-08-21 18:11:48,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390549327] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:48,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190953809] [2021-08-21 18:11:48,231 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:11:48,231 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:48,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:11:48,245 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 18:11:48,296 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 18:11:50,771 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-08-21 18:11:50,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:11:50,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 78 conjunts are in the unsatisfiable core [2021-08-21 18:11:50,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:11:51,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:11:52,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:11:52,498 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 0 proven. 401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:52,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190953809] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:52,499 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:11:52,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 37] total 56 [2021-08-21 18:11:52,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669426608] [2021-08-21 18:11:52,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-08-21 18:11:52,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:11:52,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-08-21 18:11:52,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=3041, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 18:11:52,500 INFO L87 Difference]: Start difference. First operand 180 states and 184 transitions. Second operand has 57 states, 57 states have (on average 3.789473684210526) internal successors, (216), 56 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:54,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:11:54,372 INFO L93 Difference]: Finished difference Result 223 states and 228 transitions. [2021-08-21 18:11:54,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-08-21 18:11:54,372 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.789473684210526) internal successors, (216), 56 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2021-08-21 18:11:54,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:11:54,373 INFO L225 Difference]: With dead ends: 223 [2021-08-21 18:11:54,373 INFO L226 Difference]: Without dead ends: 223 [2021-08-21 18:11:54,374 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1674 ImplicationChecksByTransitivity, 1703.2ms TimeCoverageRelationStatistics Valid=279, Invalid=6201, Unknown=0, NotChecked=0, Total=6480 [2021-08-21 18:11:54,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-08-21 18:11:54,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 124. [2021-08-21 18:11:54,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.024390243902439) internal successors, (126), 123 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:54,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2021-08-21 18:11:54,376 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 122 [2021-08-21 18:11:54,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:11:54,376 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2021-08-21 18:11:54,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.789473684210526) internal successors, (216), 56 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:54,376 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2021-08-21 18:11:54,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-08-21 18:11:54,377 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:11:54,377 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:11:54,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-21 18:11:54,584 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 18:11:54,585 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:11:54,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:11:54,585 INFO L82 PathProgramCache]: Analyzing trace with hash -361855385, now seen corresponding path program 37 times [2021-08-21 18:11:54,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:11:54,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405050330] [2021-08-21 18:11:54,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:11:54,585 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:11:54,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:11:54,676 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 189 proven. 70 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-08-21 18:11:54,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:11:54,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405050330] [2021-08-21 18:11:54,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405050330] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:54,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316742192] [2021-08-21 18:11:54,676 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:11:54,676 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:54,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:11:54,677 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 18:11:54,721 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 18:11:57,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:11:57,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 18:11:57,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:11:57,524 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 189 proven. 70 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-08-21 18:11:57,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316742192] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:57,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:11:57,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 18:11:57,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063897331] [2021-08-21 18:11:57,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:11:57,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:11:57,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:11:57,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:11:57,545 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand has 12 states, 12 states have (on average 8.166666666666666) internal successors, (98), 11 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 18:11:57,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:11:57,585 INFO L93 Difference]: Finished difference Result 178 states and 181 transitions. [2021-08-21 18:11:57,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 18:11:57,586 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.166666666666666) internal successors, (98), 11 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) Word has length 123 [2021-08-21 18:11:57,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:11:57,586 INFO L225 Difference]: With dead ends: 178 [2021-08-21 18:11:57,586 INFO L226 Difference]: Without dead ends: 132 [2021-08-21 18:11:57,586 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 41.1ms TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:11:57,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-08-21 18:11:57,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 127. [2021-08-21 18:11:57,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.0238095238095237) internal successors, (129), 126 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:57,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2021-08-21 18:11:57,588 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 123 [2021-08-21 18:11:57,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:11:57,588 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2021-08-21 18:11:57,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.166666666666666) internal successors, (98), 11 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 18:11:57,588 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2021-08-21 18:11:57,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-08-21 18:11:57,588 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:11:57,589 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:11:57,613 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 18:11:57,789 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 18:11:57,789 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:11:57,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:11:57,789 INFO L82 PathProgramCache]: Analyzing trace with hash 372812572, now seen corresponding path program 38 times [2021-08-21 18:11:57,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:11:57,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498259595] [2021-08-21 18:11:57,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:11:57,790 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:11:57,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:12:02,198 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 0 proven. 431 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:12:02,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:12:02,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498259595] [2021-08-21 18:12:02,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498259595] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:02,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903863332] [2021-08-21 18:12:02,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:12:02,199 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:12:02,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:12:02,200 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 18:12:02,201 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 18:12:04,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:12:04,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:12:04,642 WARN L261 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 170 conjunts are in the unsatisfiable core [2021-08-21 18:12:04,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:12:09,607 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-08-21 18:12:09,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 139 treesize of output 75 [2021-08-21 18:12:13,039 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-08-21 18:12:13,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 102 treesize of output 38 [2021-08-21 18:12:13,534 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 0 proven. 431 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:12:13,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903863332] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:13,534 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:12:13,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 56] total 98 [2021-08-21 18:12:13,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823390859] [2021-08-21 18:12:13,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-08-21 18:12:13,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:12:13,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-08-21 18:12:13,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=9447, Unknown=0, NotChecked=0, Total=9702 [2021-08-21 18:12:13,536 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand has 99 states, 99 states have (on average 2.0606060606060606) internal successors, (204), 98 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:12:19,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:12:19,685 INFO L93 Difference]: Finished difference Result 229 states and 233 transitions. [2021-08-21 18:12:19,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-08-21 18:12:19,685 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.0606060606060606) internal successors, (204), 98 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2021-08-21 18:12:19,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:12:19,693 INFO L225 Difference]: With dead ends: 229 [2021-08-21 18:12:19,693 INFO L226 Difference]: Without dead ends: 224 [2021-08-21 18:12:19,709 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 81 SyntacticMatches, 12 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2886 ImplicationChecksByTransitivity, 9931.6ms TimeCoverageRelationStatistics Valid=428, Invalid=15322, Unknown=0, NotChecked=0, Total=15750 [2021-08-21 18:12:19,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-08-21 18:12:19,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 187. [2021-08-21 18:12:19,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 1.0268817204301075) internal successors, (191), 186 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:12:19,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 191 transitions. [2021-08-21 18:12:19,712 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 191 transitions. Word has length 126 [2021-08-21 18:12:19,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:12:19,714 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 191 transitions. [2021-08-21 18:12:19,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.0606060606060606) internal successors, (204), 98 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:12:19,714 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 191 transitions. [2021-08-21 18:12:19,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-08-21 18:12:19,714 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:12:19,714 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:12:19,740 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 18:12:19,928 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 18:12:19,929 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:12:19,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:12:19,929 INFO L82 PathProgramCache]: Analyzing trace with hash -287420857, now seen corresponding path program 39 times [2021-08-21 18:12:19,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:12:19,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754265561] [2021-08-21 18:12:19,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:12:19,929 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:12:19,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:12:20,282 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-08-21 18:12:20,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:12:20,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754265561] [2021-08-21 18:12:20,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754265561] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:20,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031996073] [2021-08-21 18:12:20,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:12:20,283 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:12:20,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:12:20,283 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 18:12:20,284 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 18:12:23,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-08-21 18:12:23,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:12:23,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-21 18:12:23,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:12:23,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:12:23,798 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-08-21 18:12:23,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031996073] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:23,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:12:23,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2021-08-21 18:12:23,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869918108] [2021-08-21 18:12:23,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:12:23,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:12:23,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:12:23,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:12:23,800 INFO L87 Difference]: Start difference. First operand 187 states and 191 transitions. Second operand has 22 states, 22 states have (on average 4.409090909090909) internal successors, (97), 21 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:12:24,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:12:24,429 INFO L93 Difference]: Finished difference Result 195 states and 199 transitions. [2021-08-21 18:12:24,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 18:12:24,429 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.409090909090909) internal successors, (97), 21 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2021-08-21 18:12:24,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:12:24,430 INFO L225 Difference]: With dead ends: 195 [2021-08-21 18:12:24,430 INFO L226 Difference]: Without dead ends: 195 [2021-08-21 18:12:24,430 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 623.7ms TimeCoverageRelationStatistics Valid=261, Invalid=1545, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 18:12:24,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-08-21 18:12:24,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 192. [2021-08-21 18:12:24,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 1.0261780104712042) internal successors, (196), 191 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:12:24,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 196 transitions. [2021-08-21 18:12:24,433 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 196 transitions. Word has length 129 [2021-08-21 18:12:24,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:12:24,433 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 196 transitions. [2021-08-21 18:12:24,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.409090909090909) internal successors, (97), 21 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:12:24,433 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 196 transitions. [2021-08-21 18:12:24,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-08-21 18:12:24,433 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:12:24,433 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:12:24,460 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 18:12:24,643 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 18:12:24,644 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:12:24,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:12:24,644 INFO L82 PathProgramCache]: Analyzing trace with hash -372876487, now seen corresponding path program 40 times [2021-08-21 18:12:24,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:12:24,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835369851] [2021-08-21 18:12:24,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:12:24,644 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:12:24,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:12:24,754 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 190 proven. 189 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-08-21 18:12:24,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:12:24,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835369851] [2021-08-21 18:12:24,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835369851] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:24,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441950308] [2021-08-21 18:12:24,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:12:24,755 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:12:24,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:12:24,756 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 18:12:24,792 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 18:12:27,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:12:27,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:12:27,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 18:12:27,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:12:28,229 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 190 proven. 189 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-08-21 18:12:28,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441950308] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:28,230 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:12:28,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 18:12:28,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811738563] [2021-08-21 18:12:28,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:12:28,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:12:28,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:12:28,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:12:28,230 INFO L87 Difference]: Start difference. First operand 192 states and 196 transitions. Second operand has 13 states, 13 states have (on average 9.615384615384615) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:12:28,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:12:28,256 INFO L93 Difference]: Finished difference Result 242 states and 246 transitions. [2021-08-21 18:12:28,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 18:12:28,256 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 9.615384615384615) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-08-21 18:12:28,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:12:28,257 INFO L225 Difference]: With dead ends: 242 [2021-08-21 18:12:28,257 INFO L226 Difference]: Without dead ends: 201 [2021-08-21 18:12:28,257 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 54.1ms TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:12:28,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-08-21 18:12:28,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 197. [2021-08-21 18:12:28,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.0255102040816326) internal successors, (201), 196 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:12:28,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 201 transitions. [2021-08-21 18:12:28,259 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 201 transitions. Word has length 130 [2021-08-21 18:12:28,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:12:28,259 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 201 transitions. [2021-08-21 18:12:28,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.615384615384615) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:12:28,259 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 201 transitions. [2021-08-21 18:12:28,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-08-21 18:12:28,260 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:12:28,260 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:12:28,309 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 18:12:28,473 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 18:12:28,473 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:12:28,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:12:28,473 INFO L82 PathProgramCache]: Analyzing trace with hash 697438849, now seen corresponding path program 41 times [2021-08-21 18:12:28,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:12:28,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680417974] [2021-08-21 18:12:28,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:12:28,474 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:12:28,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:12:28,832 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 1 proven. 387 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-08-21 18:12:28,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:12:28,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680417974] [2021-08-21 18:12:28,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680417974] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:28,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817331223] [2021-08-21 18:12:28,832 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:12:28,832 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:12:28,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:12:28,835 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 18:12:28,837 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 18:12:32,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-08-21 18:12:32,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:12:32,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 80 conjunts are in the unsatisfiable core [2021-08-21 18:12:32,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:12:33,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:12:33,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:12:33,929 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 0 proven. 502 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:12:33,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817331223] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:33,929 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:12:33,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 39] total 60 [2021-08-21 18:12:33,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564929648] [2021-08-21 18:12:33,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-08-21 18:12:33,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:12:33,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-08-21 18:12:33,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=3502, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 18:12:33,930 INFO L87 Difference]: Start difference. First operand 197 states and 201 transitions. Second operand has 61 states, 61 states have (on average 3.8524590163934427) internal successors, (235), 60 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:12:35,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:12:35,743 INFO L93 Difference]: Finished difference Result 239 states and 243 transitions. [2021-08-21 18:12:35,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-08-21 18:12:35,743 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 3.8524590163934427) internal successors, (235), 60 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2021-08-21 18:12:35,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:12:35,744 INFO L225 Difference]: With dead ends: 239 [2021-08-21 18:12:35,744 INFO L226 Difference]: Without dead ends: 239 [2021-08-21 18:12:35,745 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1838 ImplicationChecksByTransitivity, 1829.7ms TimeCoverageRelationStatistics Valid=288, Invalid=7022, Unknown=0, NotChecked=0, Total=7310 [2021-08-21 18:12:35,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-08-21 18:12:35,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 136. [2021-08-21 18:12:35,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.0222222222222221) internal successors, (138), 135 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 18:12:35,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2021-08-21 18:12:35,747 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 134 [2021-08-21 18:12:35,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:12:35,747 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2021-08-21 18:12:35,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 3.8524590163934427) internal successors, (235), 60 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:12:35,747 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2021-08-21 18:12:35,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-08-21 18:12:35,747 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:12:35,747 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:12:35,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-21 18:12:35,956 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 18:12:35,957 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:12:35,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:12:35,957 INFO L82 PathProgramCache]: Analyzing trace with hash 2102119145, now seen corresponding path program 42 times [2021-08-21 18:12:35,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:12:35,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524927560] [2021-08-21 18:12:35,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:12:35,957 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:12:35,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:12:36,060 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 235 proven. 92 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-08-21 18:12:36,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:12:36,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524927560] [2021-08-21 18:12:36,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524927560] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:36,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071047874] [2021-08-21 18:12:36,061 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:12:36,061 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:12:36,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:12:36,061 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 18:12:36,102 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 18:12:39,289 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-08-21 18:12:39,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:12:39,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 18:12:39,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:12:39,603 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 235 proven. 92 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-08-21 18:12:39,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071047874] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:39,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:12:39,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 18:12:39,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660097293] [2021-08-21 18:12:39,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:12:39,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:12:39,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:12:39,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:12:39,604 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand has 13 states, 13 states have (on average 8.153846153846153) internal successors, (106), 12 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:12:39,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:12:39,631 INFO L93 Difference]: Finished difference Result 195 states and 198 transitions. [2021-08-21 18:12:39,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 18:12:39,631 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 8.153846153846153) internal successors, (106), 12 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-08-21 18:12:39,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:12:39,632 INFO L225 Difference]: With dead ends: 195 [2021-08-21 18:12:39,632 INFO L226 Difference]: Without dead ends: 144 [2021-08-21 18:12:39,632 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 51.0ms TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:12:39,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-08-21 18:12:39,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 139. [2021-08-21 18:12:39,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.0217391304347827) internal successors, (141), 138 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:12:39,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 141 transitions. [2021-08-21 18:12:39,634 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 141 transitions. Word has length 135 [2021-08-21 18:12:39,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:12:39,634 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 141 transitions. [2021-08-21 18:12:39,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.153846153846153) internal successors, (106), 12 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:12:39,634 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 141 transitions. [2021-08-21 18:12:39,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-08-21 18:12:39,634 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:12:39,634 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:12:39,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-08-21 18:12:39,852 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 18:12:39,853 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:12:39,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:12:39,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1503889438, now seen corresponding path program 43 times [2021-08-21 18:12:39,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:12:39,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855722037] [2021-08-21 18:12:39,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:12:39,853 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:12:39,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:12:45,620 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 539 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:12:45,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:12:45,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855722037] [2021-08-21 18:12:45,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855722037] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:45,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863735245] [2021-08-21 18:12:45,620 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:12:45,620 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:12:45,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:12:45,621 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 18:12:45,628 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 18:12:48,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:12:48,870 WARN L261 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 190 conjunts are in the unsatisfiable core [2021-08-21 18:12:48,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:12:54,446 INFO L354 Elim1Store]: treesize reduction 432, result has 0.2 percent of original size [2021-08-21 18:12:54,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 157 treesize of output 85 [2021-08-21 18:12:57,774 INFO L354 Elim1Store]: treesize reduction 432, result has 0.2 percent of original size [2021-08-21 18:12:57,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 114 treesize of output 42 [2021-08-21 18:12:58,183 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 539 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:12:58,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863735245] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:58,183 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:12:58,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 62] total 110 [2021-08-21 18:12:58,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153545390] [2021-08-21 18:12:58,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2021-08-21 18:12:58,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:12:58,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2021-08-21 18:12:58,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=11923, Unknown=0, NotChecked=0, Total=12210 [2021-08-21 18:12:58,185 INFO L87 Difference]: Start difference. First operand 139 states and 141 transitions. Second operand has 111 states, 111 states have (on average 2.027027027027027) internal successors, (225), 110 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:13:04,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:13:04,769 INFO L93 Difference]: Finished difference Result 250 states and 254 transitions. [2021-08-21 18:13:04,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-08-21 18:13:04,770 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.027027027027027) internal successors, (225), 110 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 138 [2021-08-21 18:13:04,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:13:04,774 INFO L225 Difference]: With dead ends: 250 [2021-08-21 18:13:04,774 INFO L226 Difference]: Without dead ends: 245 [2021-08-21 18:13:04,776 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 88 SyntacticMatches, 13 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3731 ImplicationChecksByTransitivity, 11471.6ms TimeCoverageRelationStatistics Valid=480, Invalid=19260, Unknown=0, NotChecked=0, Total=19740 [2021-08-21 18:13:04,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-08-21 18:13:04,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 204. [2021-08-21 18:13:04,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.0246305418719213) internal successors, (208), 203 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:13:04,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 208 transitions. [2021-08-21 18:13:04,778 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 208 transitions. Word has length 138 [2021-08-21 18:13:04,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:13:04,778 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 208 transitions. [2021-08-21 18:13:04,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.027027027027027) internal successors, (225), 110 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:13:04,779 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 208 transitions. [2021-08-21 18:13:04,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-08-21 18:13:04,779 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:13:04,779 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:13:04,805 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 18:13:05,005 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 18:13:05,005 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:13:05,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:13:05,005 INFO L82 PathProgramCache]: Analyzing trace with hash -538000695, now seen corresponding path program 44 times [2021-08-21 18:13:05,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:13:05,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229513094] [2021-08-21 18:13:05,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:13:05,005 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:13:05,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:13:05,308 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-08-21 18:13:05,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:13:05,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229513094] [2021-08-21 18:13:05,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229513094] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:05,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508611365] [2021-08-21 18:13:05,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:13:05,309 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:13:05,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:13:05,309 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 18:13:05,348 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 18:13:09,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:13:09,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:13:09,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-21 18:13:09,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:13:09,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:13:09,623 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-08-21 18:13:09,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508611365] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:09,624 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:13:09,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-08-21 18:13:09,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801766202] [2021-08-21 18:13:09,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:13:09,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:13:09,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:13:09,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:13:09,626 INFO L87 Difference]: Start difference. First operand 204 states and 208 transitions. Second operand has 24 states, 24 states have (on average 4.375) internal successors, (105), 23 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:13:10,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:13:10,234 INFO L93 Difference]: Finished difference Result 212 states and 216 transitions. [2021-08-21 18:13:10,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 18:13:10,239 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.375) internal successors, (105), 23 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-08-21 18:13:10,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:13:10,240 INFO L225 Difference]: With dead ends: 212 [2021-08-21 18:13:10,240 INFO L226 Difference]: Without dead ends: 212 [2021-08-21 18:13:10,240 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 139 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 619.2ms TimeCoverageRelationStatistics Valid=303, Invalid=1859, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 18:13:10,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-08-21 18:13:10,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 209. [2021-08-21 18:13:10,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 1.0240384615384615) internal successors, (213), 208 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:13:10,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 213 transitions. [2021-08-21 18:13:10,243 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 213 transitions. Word has length 141 [2021-08-21 18:13:10,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:13:10,243 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 213 transitions. [2021-08-21 18:13:10,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.375) internal successors, (105), 23 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:13:10,243 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 213 transitions. [2021-08-21 18:13:10,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-08-21 18:13:10,243 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:13:10,243 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:13:10,273 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 18:13:10,464 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 18:13:10,465 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:13:10,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:13:10,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1835604165, now seen corresponding path program 45 times [2021-08-21 18:13:10,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:13:10,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242622452] [2021-08-21 18:13:10,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:13:10,465 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:13:10,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:13:10,577 INFO L134 CoverageAnalysis]: Checked inductivity of 583 backedges. 231 proven. 235 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-08-21 18:13:10,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:13:10,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242622452] [2021-08-21 18:13:10,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242622452] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:10,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977143062] [2021-08-21 18:13:10,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:13:10,578 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:13:10,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:13:10,579 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 18:13:10,580 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 18:13:14,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-08-21 18:13:14,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:13:14,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 18:13:14,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:13:14,952 INFO L134 CoverageAnalysis]: Checked inductivity of 583 backedges. 231 proven. 235 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-08-21 18:13:14,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977143062] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:14,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:13:14,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 18:13:14,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002943385] [2021-08-21 18:13:14,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 18:13:14,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:13:14,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 18:13:14,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:13:14,953 INFO L87 Difference]: Start difference. First operand 209 states and 213 transitions. Second operand has 14 states, 14 states have (on average 9.571428571428571) internal successors, (134), 13 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:13:14,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:13:14,976 INFO L93 Difference]: Finished difference Result 263 states and 267 transitions. [2021-08-21 18:13:14,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 18:13:14,976 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 9.571428571428571) internal successors, (134), 13 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2021-08-21 18:13:14,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:13:14,977 INFO L225 Difference]: With dead ends: 263 [2021-08-21 18:13:14,977 INFO L226 Difference]: Without dead ends: 218 [2021-08-21 18:13:14,977 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 55.0ms TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:13:14,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-08-21 18:13:14,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 214. [2021-08-21 18:13:14,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 1.0234741784037558) internal successors, (218), 213 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:13:14,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 218 transitions. [2021-08-21 18:13:14,979 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 218 transitions. Word has length 142 [2021-08-21 18:13:14,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:13:14,980 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 218 transitions. [2021-08-21 18:13:14,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.571428571428571) internal successors, (134), 13 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:13:14,980 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 218 transitions. [2021-08-21 18:13:14,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-08-21 18:13:14,980 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:13:14,980 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:13:15,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-08-21 18:13:15,209 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 18:13:15,209 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:13:15,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:13:15,210 INFO L82 PathProgramCache]: Analyzing trace with hash -653943463, now seen corresponding path program 46 times [2021-08-21 18:13:15,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:13:15,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482408767] [2021-08-21 18:13:15,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:13:15,210 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:13:15,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:13:15,688 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 1 proven. 475 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-08-21 18:13:15,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:13:15,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482408767] [2021-08-21 18:13:15,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482408767] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:15,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479001723] [2021-08-21 18:13:15,688 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:13:15,688 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:13:15,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:13:15,700 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 18:13:15,701 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 18:13:19,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:13:19,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:13:19,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-21 18:13:19,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:13:20,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-08-21 18:13:20,152 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 0 proven. 476 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-08-21 18:13:20,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479001723] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:20,152 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:13:20,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2021-08-21 18:13:20,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967518822] [2021-08-21 18:13:20,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 18:13:20,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:13:20,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 18:13:20,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=700, Unknown=0, NotChecked=0, Total=756 [2021-08-21 18:13:20,153 INFO L87 Difference]: Start difference. First operand 214 states and 218 transitions. Second operand has 28 states, 28 states have (on average 4.392857142857143) internal successors, (123), 27 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:13:20,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:13:20,763 INFO L93 Difference]: Finished difference Result 258 states and 262 transitions. [2021-08-21 18:13:20,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 18:13:20,763 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.392857142857143) internal successors, (123), 27 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2021-08-21 18:13:20,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:13:20,764 INFO L225 Difference]: With dead ends: 258 [2021-08-21 18:13:20,764 INFO L226 Difference]: Without dead ends: 258 [2021-08-21 18:13:20,764 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 142 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 652.6ms TimeCoverageRelationStatistics Valid=121, Invalid=1601, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 18:13:20,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-08-21 18:13:20,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 148. [2021-08-21 18:13:20,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.0204081632653061) internal successors, (150), 147 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:13:20,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 150 transitions. [2021-08-21 18:13:20,766 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 150 transitions. Word has length 146 [2021-08-21 18:13:20,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:13:20,766 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 150 transitions. [2021-08-21 18:13:20,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.392857142857143) internal successors, (123), 27 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:13:20,766 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 150 transitions. [2021-08-21 18:13:20,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-08-21 18:13:20,767 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:13:20,767 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:13:20,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-08-21 18:13:20,976 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 18:13:20,977 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:13:20,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:13:20,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1923002047, now seen corresponding path program 47 times [2021-08-21 18:13:20,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:13:20,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992934355] [2021-08-21 18:13:20,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:13:20,977 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:13:20,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:13:21,120 INFO L134 CoverageAnalysis]: Checked inductivity of 634 backedges. 286 proven. 117 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-08-21 18:13:21,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:13:21,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992934355] [2021-08-21 18:13:21,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992934355] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:21,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499762786] [2021-08-21 18:13:21,121 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:13:21,121 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:13:21,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:13:21,122 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 18:13:21,123 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 18:13:25,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-08-21 18:13:25,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:13:25,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 18:13:25,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:13:25,587 INFO L134 CoverageAnalysis]: Checked inductivity of 634 backedges. 286 proven. 117 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-08-21 18:13:25,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499762786] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:25,588 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:13:25,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 18:13:25,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54971691] [2021-08-21 18:13:25,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 18:13:25,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:13:25,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 18:13:25,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:13:25,589 INFO L87 Difference]: Start difference. First operand 148 states and 150 transitions. Second operand has 14 states, 14 states have (on average 8.142857142857142) internal successors, (114), 13 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:13:25,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:13:25,619 INFO L93 Difference]: Finished difference Result 212 states and 215 transitions. [2021-08-21 18:13:25,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 18:13:25,619 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 8.142857142857142) internal successors, (114), 13 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2021-08-21 18:13:25,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:13:25,620 INFO L225 Difference]: With dead ends: 212 [2021-08-21 18:13:25,620 INFO L226 Difference]: Without dead ends: 156 [2021-08-21 18:13:25,620 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 82.6ms TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:13:25,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-08-21 18:13:25,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 151. [2021-08-21 18:13:25,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.02) internal successors, (153), 150 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:13:25,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2021-08-21 18:13:25,622 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 147 [2021-08-21 18:13:25,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:13:25,622 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2021-08-21 18:13:25,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.142857142857142) internal successors, (114), 13 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:13:25,622 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2021-08-21 18:13:25,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-08-21 18:13:25,622 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:13:25,622 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:13:25,653 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 18:13:25,844 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 18:13:25,844 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:13:25,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:13:25,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1138366730, now seen corresponding path program 48 times [2021-08-21 18:13:25,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:13:25,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546092937] [2021-08-21 18:13:25,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:13:25,845 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:13:25,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:13:33,007 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 0 proven. 659 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:13:33,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:13:33,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546092937] [2021-08-21 18:13:33,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546092937] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:33,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183466485] [2021-08-21 18:13:33,007 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:13:33,007 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:13:33,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:13:33,008 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 18:13:33,009 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 18:13:37,102 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-08-21 18:13:37,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:13:37,105 WARN L261 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 212 conjunts are in the unsatisfiable core [2021-08-21 18:13:37,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:13:44,890 INFO L354 Elim1Store]: treesize reduction 522, result has 0.2 percent of original size [2021-08-21 18:13:44,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 171 treesize of output 95 [2021-08-21 18:13:51,974 INFO L354 Elim1Store]: treesize reduction 618, result has 0.5 percent of original size [2021-08-21 18:13:51,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 138 treesize of output 65 [2021-08-21 18:13:52,723 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 0 proven. 662 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:13:52,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183466485] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:52,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:13:52,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 70] total 125 [2021-08-21 18:13:52,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880958660] [2021-08-21 18:13:52,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2021-08-21 18:13:52,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:13:52,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2021-08-21 18:13:52,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=15417, Unknown=0, NotChecked=0, Total=15750 [2021-08-21 18:13:52,725 INFO L87 Difference]: Start difference. First operand 151 states and 153 transitions. Second operand has 126 states, 126 states have (on average 2.0555555555555554) internal successors, (259), 125 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:14:04,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:14:04,858 INFO L93 Difference]: Finished difference Result 324 states and 329 transitions. [2021-08-21 18:14:04,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-08-21 18:14:04,859 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 2.0555555555555554) internal successors, (259), 125 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-08-21 18:14:04,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:14:04,860 INFO L225 Difference]: With dead ends: 324 [2021-08-21 18:14:04,860 INFO L226 Difference]: Without dead ends: 319 [2021-08-21 18:14:04,861 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 92 SyntacticMatches, 13 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6752 ImplicationChecksByTransitivity, 19502.4ms TimeCoverageRelationStatistics Valid=711, Invalid=31509, Unknown=0, NotChecked=0, Total=32220 [2021-08-21 18:14:04,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-08-21 18:14:04,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 221. [2021-08-21 18:14:04,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.0227272727272727) internal successors, (225), 220 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:14:04,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 225 transitions. [2021-08-21 18:14:04,863 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 225 transitions. Word has length 150 [2021-08-21 18:14:04,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:14:04,864 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 225 transitions. [2021-08-21 18:14:04,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 2.0555555555555554) internal successors, (259), 125 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:14:04,864 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 225 transitions. [2021-08-21 18:14:04,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-08-21 18:14:04,864 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:14:04,864 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:14:04,894 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 18:14:05,072 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 18:14:05,073 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:14:05,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:14:05,073 INFO L82 PathProgramCache]: Analyzing trace with hash 720337185, now seen corresponding path program 49 times [2021-08-21 18:14:05,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:14:05,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124574351] [2021-08-21 18:14:05,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:14:05,073 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:14:05,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:14:05,505 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-08-21 18:14:05,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:14:05,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124574351] [2021-08-21 18:14:05,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124574351] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:14:05,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520654573] [2021-08-21 18:14:05,505 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:14:05,506 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:14:05,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:14:05,506 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 18:14:05,507 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 18:14:10,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:14:10,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-21 18:14:10,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:14:10,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:14:10,603 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-08-21 18:14:10,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520654573] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:14:10,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:14:10,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-08-21 18:14:10,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257403683] [2021-08-21 18:14:10,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 18:14:10,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:14:10,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 18:14:10,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:14:10,604 INFO L87 Difference]: Start difference. First operand 221 states and 225 transitions. Second operand has 26 states, 26 states have (on average 4.346153846153846) internal successors, (113), 25 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:14:11,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:14:11,336 INFO L93 Difference]: Finished difference Result 229 states and 233 transitions. [2021-08-21 18:14:11,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 18:14:11,336 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.346153846153846) internal successors, (113), 25 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 153 [2021-08-21 18:14:11,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:14:11,337 INFO L225 Difference]: With dead ends: 229 [2021-08-21 18:14:11,337 INFO L226 Difference]: Without dead ends: 229 [2021-08-21 18:14:11,337 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 151 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 824.6ms TimeCoverageRelationStatistics Valid=348, Invalid=2202, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 18:14:11,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-08-21 18:14:11,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 226. [2021-08-21 18:14:11,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.0222222222222221) internal successors, (230), 225 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:14:11,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 230 transitions. [2021-08-21 18:14:11,353 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 230 transitions. Word has length 153 [2021-08-21 18:14:11,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:14:11,353 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 230 transitions. [2021-08-21 18:14:11,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.346153846153846) internal successors, (113), 25 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:14:11,353 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 230 transitions. [2021-08-21 18:14:11,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-08-21 18:14:11,354 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:14:11,354 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:14:11,421 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 18:14:11,588 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 18:14:11,589 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:14:11,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:14:11,589 INFO L82 PathProgramCache]: Analyzing trace with hash 480123411, now seen corresponding path program 50 times [2021-08-21 18:14:11,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:14:11,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342011803] [2021-08-21 18:14:11,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:14:11,589 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:14:11,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:14:11,788 INFO L134 CoverageAnalysis]: Checked inductivity of 707 backedges. 276 proven. 286 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-08-21 18:14:11,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:14:11,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342011803] [2021-08-21 18:14:11,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342011803] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:14:11,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570661812] [2021-08-21 18:14:11,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:14:11,788 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:14:11,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:14:11,789 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 18:14:11,790 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 18:14:16,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:14:16,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:14:16,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 18:14:16,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:14:17,137 INFO L134 CoverageAnalysis]: Checked inductivity of 707 backedges. 276 proven. 286 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-08-21 18:14:17,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570661812] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:14:17,137 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:14:17,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 18:14:17,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650066438] [2021-08-21 18:14:17,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:14:17,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:14:17,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:14:17,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:14:17,138 INFO L87 Difference]: Start difference. First operand 226 states and 230 transitions. Second operand has 15 states, 15 states have (on average 9.533333333333333) internal successors, (143), 14 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 18:14:17,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:14:17,164 INFO L93 Difference]: Finished difference Result 284 states and 288 transitions. [2021-08-21 18:14:17,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 18:14:17,164 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 9.533333333333333) internal successors, (143), 14 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) Word has length 154 [2021-08-21 18:14:17,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:14:17,165 INFO L225 Difference]: With dead ends: 284 [2021-08-21 18:14:17,165 INFO L226 Difference]: Without dead ends: 235 [2021-08-21 18:14:17,165 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 79.7ms TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:14:17,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-08-21 18:14:17,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 231. [2021-08-21 18:14:17,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 1.0217391304347827) internal successors, (235), 230 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:14:17,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 235 transitions. [2021-08-21 18:14:17,167 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 235 transitions. Word has length 154 [2021-08-21 18:14:17,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:14:17,167 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 235 transitions. [2021-08-21 18:14:17,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 9.533333333333333) internal successors, (143), 14 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 18:14:17,167 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 235 transitions. [2021-08-21 18:14:17,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-08-21 18:14:17,168 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:14:17,168 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:14:17,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-08-21 18:14:17,392 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 18:14:17,393 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:14:17,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:14:17,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1664483099, now seen corresponding path program 51 times [2021-08-21 18:14:17,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:14:17,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835829534] [2021-08-21 18:14:17,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:14:17,393 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:14:17,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:14:18,008 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 1 proven. 572 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-08-21 18:14:18,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:14:18,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835829534] [2021-08-21 18:14:18,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835829534] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:14:18,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535284061] [2021-08-21 18:14:18,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:14:18,008 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:14:18,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:14:18,025 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 18:14:18,069 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 18:14:23,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-08-21 18:14:23,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:14:23,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 98 conjunts are in the unsatisfiable core [2021-08-21 18:14:23,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:14:24,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:14:25,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-21 18:14:25,466 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 0 proven. 746 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:14:25,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535284061] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:14:25,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:14:25,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 47] total 72 [2021-08-21 18:14:25,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109940722] [2021-08-21 18:14:25,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-08-21 18:14:25,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:14:25,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-08-21 18:14:25,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=5066, Unknown=0, NotChecked=0, Total=5256 [2021-08-21 18:14:25,467 INFO L87 Difference]: Start difference. First operand 231 states and 235 transitions. Second operand has 73 states, 73 states have (on average 3.7945205479452055) internal successors, (277), 72 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:14:27,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:14:27,816 INFO L93 Difference]: Finished difference Result 281 states and 285 transitions. [2021-08-21 18:14:27,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-08-21 18:14:27,817 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 3.7945205479452055) internal successors, (277), 72 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 158 [2021-08-21 18:14:27,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:14:27,817 INFO L225 Difference]: With dead ends: 281 [2021-08-21 18:14:27,817 INFO L226 Difference]: Without dead ends: 281 [2021-08-21 18:14:27,818 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2627 ImplicationChecksByTransitivity, 2441.0ms TimeCoverageRelationStatistics Valid=340, Invalid=9962, Unknown=0, NotChecked=0, Total=10302 [2021-08-21 18:14:27,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-08-21 18:14:27,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 160. [2021-08-21 18:14:27,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.0188679245283019) internal successors, (162), 159 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:14:27,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2021-08-21 18:14:27,821 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 158 [2021-08-21 18:14:27,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:14:27,821 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2021-08-21 18:14:27,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 3.7945205479452055) internal successors, (277), 72 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:14:27,821 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2021-08-21 18:14:27,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-08-21 18:14:27,822 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:14:27,822 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:14:27,880 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 18:14:28,022 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 18:14:28,022 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:14:28,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:14:28,023 INFO L82 PathProgramCache]: Analyzing trace with hash 29026691, now seen corresponding path program 52 times [2021-08-21 18:14:28,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:14:28,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819950144] [2021-08-21 18:14:28,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:14:28,023 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:14:28,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:14:28,159 INFO L134 CoverageAnalysis]: Checked inductivity of 763 backedges. 342 proven. 145 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-08-21 18:14:28,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:14:28,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819950144] [2021-08-21 18:14:28,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819950144] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:14:28,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716517154] [2021-08-21 18:14:28,160 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:14:28,160 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:14:28,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:14:28,161 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 18:14:28,161 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 18:14:33,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:14:33,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:14:33,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 18:14:33,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:14:33,623 INFO L134 CoverageAnalysis]: Checked inductivity of 763 backedges. 342 proven. 145 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-08-21 18:14:33,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716517154] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:14:33,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:14:33,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 18:14:33,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988452450] [2021-08-21 18:14:33,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:14:33,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:14:33,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:14:33,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:14:33,624 INFO L87 Difference]: Start difference. First operand 160 states and 162 transitions. Second operand has 15 states, 15 states have (on average 8.133333333333333) internal successors, (122), 14 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:14:33,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:14:33,657 INFO L93 Difference]: Finished difference Result 229 states and 232 transitions. [2021-08-21 18:14:33,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 18:14:33,657 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 8.133333333333333) internal successors, (122), 14 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 159 [2021-08-21 18:14:33,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:14:33,658 INFO L225 Difference]: With dead ends: 229 [2021-08-21 18:14:33,658 INFO L226 Difference]: Without dead ends: 168 [2021-08-21 18:14:33,658 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 69.0ms TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:14:33,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-08-21 18:14:33,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 163. [2021-08-21 18:14:33,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.0185185185185186) internal successors, (165), 162 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:14:33,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 165 transitions. [2021-08-21 18:14:33,659 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 165 transitions. Word has length 159 [2021-08-21 18:14:33,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:14:33,659 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 165 transitions. [2021-08-21 18:14:33,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.133333333333333) internal successors, (122), 14 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:14:33,660 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 165 transitions. [2021-08-21 18:14:33,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-08-21 18:14:33,660 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:14:33,660 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:14:33,693 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 18:14:33,880 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 18:14:33,880 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:14:33,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:14:33,880 INFO L82 PathProgramCache]: Analyzing trace with hash 267098040, now seen corresponding path program 53 times [2021-08-21 18:14:33,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:14:33,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521955965] [2021-08-21 18:14:33,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:14:33,881 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:14:33,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:14:42,523 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 0 proven. 791 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:14:42,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:14:42,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521955965] [2021-08-21 18:14:42,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521955965] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:14:42,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622045266] [2021-08-21 18:14:42,523 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:14:42,524 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:14:42,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:14:42,524 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 18:14:42,525 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 18:14:47,438 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-08-21 18:14:47,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:14:47,441 WARN L261 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 228 conjunts are in the unsatisfiable core [2021-08-21 18:14:47,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:14:56,230 INFO L354 Elim1Store]: treesize reduction 640, result has 0.2 percent of original size [2021-08-21 18:14:56,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 189 treesize of output 105 [2021-08-21 18:15:01,722 INFO L354 Elim1Store]: treesize reduction 640, result has 0.2 percent of original size [2021-08-21 18:15:01,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 134 treesize of output 50 [2021-08-21 18:15:02,377 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 0 proven. 791 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:15:02,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622045266] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:02,377 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:15:02,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 76] total 134 [2021-08-21 18:15:02,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454502664] [2021-08-21 18:15:02,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2021-08-21 18:15:02,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:15:02,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2021-08-21 18:15:02,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=17735, Unknown=0, NotChecked=0, Total=18090 [2021-08-21 18:15:02,379 INFO L87 Difference]: Start difference. First operand 163 states and 165 transitions. Second operand has 135 states, 135 states have (on average 1.9777777777777779) internal successors, (267), 134 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:15,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:15:15,594 INFO L93 Difference]: Finished difference Result 292 states and 296 transitions. [2021-08-21 18:15:15,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-08-21 18:15:15,594 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 1.9777777777777779) internal successors, (267), 134 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 162 [2021-08-21 18:15:15,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:15:15,595 INFO L225 Difference]: With dead ends: 292 [2021-08-21 18:15:15,595 INFO L226 Difference]: Without dead ends: 287 [2021-08-21 18:15:15,596 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 100 SyntacticMatches, 15 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5567 ImplicationChecksByTransitivity, 19772.5ms TimeCoverageRelationStatistics Valid=588, Invalid=28482, Unknown=0, NotChecked=0, Total=29070 [2021-08-21 18:15:15,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-08-21 18:15:15,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 238. [2021-08-21 18:15:15,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 1.021097046413502) internal successors, (242), 237 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:15,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 242 transitions. [2021-08-21 18:15:15,599 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 242 transitions. Word has length 162 [2021-08-21 18:15:15,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:15:15,599 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 242 transitions. [2021-08-21 18:15:15,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 1.9777777777777779) internal successors, (267), 134 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:15,599 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 242 transitions. [2021-08-21 18:15:15,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-08-21 18:15:15,599 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:15:15,599 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:15:15,636 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 18:15:15,812 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 18:15:15,813 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:15:15,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:15:15,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1659650403, now seen corresponding path program 54 times [2021-08-21 18:15:15,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:15:15,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075993176] [2021-08-21 18:15:15,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:15:15,813 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:15:15,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:15:16,391 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-08-21 18:15:16,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:15:16,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075993176] [2021-08-21 18:15:16,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075993176] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:16,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397549005] [2021-08-21 18:15:16,392 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:15:16,392 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:15:16,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:15:16,393 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 18:15:16,395 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 18:15:22,655 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-08-21 18:15:22,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:15:22,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-21 18:15:22,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:15:23,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:15:23,122 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-08-21 18:15:23,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397549005] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:23,123 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:15:23,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2021-08-21 18:15:23,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623867215] [2021-08-21 18:15:23,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 18:15:23,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:15:23,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 18:15:23,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2021-08-21 18:15:23,123 INFO L87 Difference]: Start difference. First operand 238 states and 242 transitions. Second operand has 28 states, 28 states have (on average 4.321428571428571) internal successors, (121), 27 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:24,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:15:24,083 INFO L93 Difference]: Finished difference Result 246 states and 250 transitions. [2021-08-21 18:15:24,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 18:15:24,083 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.321428571428571) internal successors, (121), 27 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-08-21 18:15:24,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:15:24,084 INFO L225 Difference]: With dead ends: 246 [2021-08-21 18:15:24,084 INFO L226 Difference]: Without dead ends: 246 [2021-08-21 18:15:24,084 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 163 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 1081.7ms TimeCoverageRelationStatistics Valid=396, Invalid=2574, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 18:15:24,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-08-21 18:15:24,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 243. [2021-08-21 18:15:24,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 1.0206611570247934) internal successors, (247), 242 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:24,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 247 transitions. [2021-08-21 18:15:24,086 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 247 transitions. Word has length 165 [2021-08-21 18:15:24,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:15:24,086 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 247 transitions. [2021-08-21 18:15:24,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.321428571428571) internal successors, (121), 27 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:24,087 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 247 transitions. [2021-08-21 18:15:24,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-08-21 18:15:24,087 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:15:24,087 INFO L512 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:15:24,123 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 18:15:24,296 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 18:15:24,297 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:15:24,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:15:24,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1061578283, now seen corresponding path program 55 times [2021-08-21 18:15:24,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:15:24,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084168571] [2021-08-21 18:15:24,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:15:24,297 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:15:24,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:15:24,471 INFO L134 CoverageAnalysis]: Checked inductivity of 843 backedges. 325 proven. 342 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-08-21 18:15:24,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:15:24,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084168571] [2021-08-21 18:15:24,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084168571] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:24,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448306255] [2021-08-21 18:15:24,471 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:15:24,471 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:15:24,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:15:24,472 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 18:15:24,473 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 18:15:30,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:15:30,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 18:15:30,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:15:31,154 INFO L134 CoverageAnalysis]: Checked inductivity of 843 backedges. 325 proven. 342 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-08-21 18:15:31,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448306255] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:31,154 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:15:31,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-21 18:15:31,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640300028] [2021-08-21 18:15:31,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:15:31,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:15:31,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:15:31,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:15:31,155 INFO L87 Difference]: Start difference. First operand 243 states and 247 transitions. Second operand has 16 states, 16 states have (on average 9.5) internal successors, (152), 15 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:31,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:15:31,185 INFO L93 Difference]: Finished difference Result 305 states and 309 transitions. [2021-08-21 18:15:31,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 18:15:31,186 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 9.5) internal successors, (152), 15 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 166 [2021-08-21 18:15:31,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:15:31,186 INFO L225 Difference]: With dead ends: 305 [2021-08-21 18:15:31,187 INFO L226 Difference]: Without dead ends: 252 [2021-08-21 18:15:31,187 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 90.7ms TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:15:31,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-08-21 18:15:31,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 248. [2021-08-21 18:15:31,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.0202429149797572) internal successors, (252), 247 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:31,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 252 transitions. [2021-08-21 18:15:31,189 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 252 transitions. Word has length 166 [2021-08-21 18:15:31,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:15:31,189 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 252 transitions. [2021-08-21 18:15:31,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.5) internal successors, (152), 15 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:31,189 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 252 transitions. [2021-08-21 18:15:31,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-08-21 18:15:31,190 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:15:31,190 INFO L512 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:15:31,234 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 18:15:31,415 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 18:15:31,415 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:15:31,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:15:31,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1850682317, now seen corresponding path program 56 times [2021-08-21 18:15:31,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:15:31,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085311534] [2021-08-21 18:15:31,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:15:31,416 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:15:31,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:15:33,123 INFO L134 CoverageAnalysis]: Checked inductivity of 889 backedges. 0 proven. 886 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:15:33,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:15:33,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085311534] [2021-08-21 18:15:33,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085311534] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:33,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513849176] [2021-08-21 18:15:33,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:15:33,123 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:15:33,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:15:33,124 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 18:15:33,125 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 18:15:39,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:15:39,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:15:39,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 104 conjunts are in the unsatisfiable core [2021-08-21 18:15:39,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:15:40,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-21 18:15:40,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:15:40,434 INFO L134 CoverageAnalysis]: Checked inductivity of 889 backedges. 0 proven. 886 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:15:40,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513849176] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:40,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:15:40,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2021-08-21 18:15:40,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893906674] [2021-08-21 18:15:40,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-08-21 18:15:40,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:15:40,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-08-21 18:15:40,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 18:15:40,435 INFO L87 Difference]: Start difference. First operand 248 states and 252 transitions. Second operand has 52 states, 52 states have (on average 3.230769230769231) internal successors, (168), 51 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:42,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:15:42,231 INFO L93 Difference]: Finished difference Result 299 states and 303 transitions. [2021-08-21 18:15:42,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-08-21 18:15:42,231 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.230769230769231) internal successors, (168), 51 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-08-21 18:15:42,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:15:42,232 INFO L225 Difference]: With dead ends: 299 [2021-08-21 18:15:42,232 INFO L226 Difference]: Without dead ends: 299 [2021-08-21 18:15:42,232 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 166 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1913.0ms TimeCoverageRelationStatistics Valid=161, Invalid=4261, Unknown=0, NotChecked=0, Total=4422 [2021-08-21 18:15:42,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-08-21 18:15:42,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 172. [2021-08-21 18:15:42,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.0175438596491229) internal successors, (174), 171 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:42,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 174 transitions. [2021-08-21 18:15:42,234 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 174 transitions. Word has length 170 [2021-08-21 18:15:42,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:15:42,234 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 174 transitions. [2021-08-21 18:15:42,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.230769230769231) internal successors, (168), 51 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:42,234 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 174 transitions. [2021-08-21 18:15:42,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-08-21 18:15:42,235 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:15:42,235 INFO L512 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:15:42,270 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-08-21 18:15:42,435 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 18:15:42,436 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:15:42,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:15:42,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1988762139, now seen corresponding path program 57 times [2021-08-21 18:15:42,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:15:42,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302394938] [2021-08-21 18:15:42,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:15:42,437 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:15:42,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:15:42,681 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 403 proven. 176 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-08-21 18:15:42,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:15:42,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302394938] [2021-08-21 18:15:42,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302394938] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:42,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557606764] [2021-08-21 18:15:42,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:15:42,682 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:15:42,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:15:42,682 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 18:15:42,683 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 18:15:49,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-08-21 18:15:49,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:15:49,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 18:15:49,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:15:49,407 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 403 proven. 176 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-08-21 18:15:49,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557606764] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:49,407 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:15:49,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-21 18:15:49,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111778644] [2021-08-21 18:15:49,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:15:49,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:15:49,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:15:49,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:15:49,408 INFO L87 Difference]: Start difference. First operand 172 states and 174 transitions. Second operand has 16 states, 16 states have (on average 8.125) internal successors, (130), 15 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:49,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:15:49,446 INFO L93 Difference]: Finished difference Result 246 states and 249 transitions. [2021-08-21 18:15:49,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 18:15:49,447 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.125) internal successors, (130), 15 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 171 [2021-08-21 18:15:49,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:15:49,447 INFO L225 Difference]: With dead ends: 246 [2021-08-21 18:15:49,447 INFO L226 Difference]: Without dead ends: 180 [2021-08-21 18:15:49,448 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 112.1ms TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:15:49,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-08-21 18:15:49,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 175. [2021-08-21 18:15:49,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.0172413793103448) internal successors, (177), 174 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:49,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2021-08-21 18:15:49,449 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 171 [2021-08-21 18:15:49,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:15:49,449 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2021-08-21 18:15:49,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.125) internal successors, (130), 15 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:49,451 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2021-08-21 18:15:49,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-08-21 18:15:49,451 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:15:49,451 INFO L512 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:15:49,488 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 18:15:49,672 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 18:15:49,673 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:15:49,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:15:49,673 INFO L82 PathProgramCache]: Analyzing trace with hash 742793424, now seen corresponding path program 58 times [2021-08-21 18:15:49,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:15:49,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289573986] [2021-08-21 18:15:49,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:15:49,673 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:15:49,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:15:59,472 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 0 proven. 935 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:15:59,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:15:59,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289573986] [2021-08-21 18:15:59,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289573986] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:59,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159335745] [2021-08-21 18:15:59,473 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:15:59,473 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:15:59,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:15:59,474 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 18:15:59,475 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 18:16:05,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:16:05,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:16:05,513 WARN L261 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 252 conjunts are in the unsatisfiable core [2021-08-21 18:16:05,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:16:17,060 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-08-21 18:16:17,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 211 treesize of output 115 [2021-08-21 18:16:24,169 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-08-21 18:16:24,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 150 treesize of output 54 [2021-08-21 18:16:24,715 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 0 proven. 935 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:16:24,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159335745] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:16:24,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:16:24,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 80] total 143 [2021-08-21 18:16:24,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627949899] [2021-08-21 18:16:24,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 144 states [2021-08-21 18:16:24,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:16:24,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2021-08-21 18:16:24,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=20221, Unknown=0, NotChecked=0, Total=20592 [2021-08-21 18:16:24,718 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand has 144 states, 144 states have (on average 2.0) internal successors, (288), 143 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:16:38,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:16:38,081 INFO L93 Difference]: Finished difference Result 313 states and 317 transitions. [2021-08-21 18:16:38,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-08-21 18:16:38,082 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 144 states have (on average 2.0) internal successors, (288), 143 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2021-08-21 18:16:38,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:16:38,083 INFO L225 Difference]: With dead ends: 313 [2021-08-21 18:16:38,083 INFO L226 Difference]: Without dead ends: 308 [2021-08-21 18:16:38,084 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 109 SyntacticMatches, 16 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6236 ImplicationChecksByTransitivity, 22927.2ms TimeCoverageRelationStatistics Valid=621, Invalid=32685, Unknown=0, NotChecked=0, Total=33306 [2021-08-21 18:16:38,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-08-21 18:16:38,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 255. [2021-08-21 18:16:38,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.0196850393700787) internal successors, (259), 254 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:16:38,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 259 transitions. [2021-08-21 18:16:38,086 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 259 transitions. Word has length 174 [2021-08-21 18:16:38,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:16:38,086 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 259 transitions. [2021-08-21 18:16:38,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 144 states, 144 states have (on average 2.0) internal successors, (288), 143 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:16:38,086 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 259 transitions. [2021-08-21 18:16:38,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-08-21 18:16:38,087 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:16:38,087 INFO L512 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:16:38,123 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 18:16:38,287 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 18:16:38,288 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:16:38,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:16:38,288 INFO L82 PathProgramCache]: Analyzing trace with hash -803823109, now seen corresponding path program 59 times [2021-08-21 18:16:38,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:16:38,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320006089] [2021-08-21 18:16:38,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:16:38,288 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:16:38,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:16:38,879 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-08-21 18:16:38,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:16:38,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320006089] [2021-08-21 18:16:38,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320006089] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:16:38,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697587861] [2021-08-21 18:16:38,879 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:16:38,880 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:16:38,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:16:38,880 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 18:16:38,881 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 18:16:46,233 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-08-21 18:16:46,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:16:46,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 60 conjunts are in the unsatisfiable core [2021-08-21 18:16:46,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:16:46,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:16:46,860 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-08-21 18:16:46,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697587861] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:16:46,860 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:16:46,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30] total 30 [2021-08-21 18:16:46,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090657203] [2021-08-21 18:16:46,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 18:16:46,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:16:46,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 18:16:46,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=870, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:16:46,861 INFO L87 Difference]: Start difference. First operand 255 states and 259 transitions. Second operand has 31 states, 31 states have (on average 4.290322580645161) internal successors, (133), 30 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:16:48,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:16:48,008 INFO L93 Difference]: Finished difference Result 267 states and 272 transitions. [2021-08-21 18:16:48,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 18:16:48,008 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.290322580645161) internal successors, (133), 30 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 177 [2021-08-21 18:16:48,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:16:48,009 INFO L225 Difference]: With dead ends: 267 [2021-08-21 18:16:48,009 INFO L226 Difference]: Without dead ends: 267 [2021-08-21 18:16:48,009 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 174 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1243.2ms TimeCoverageRelationStatistics Valid=468, Invalid=3192, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 18:16:48,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-08-21 18:16:48,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 260. [2021-08-21 18:16:48,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 1.0193050193050193) internal successors, (264), 259 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:16:48,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 264 transitions. [2021-08-21 18:16:48,011 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 264 transitions. Word has length 177 [2021-08-21 18:16:48,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:16:48,012 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 264 transitions. [2021-08-21 18:16:48,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.290322580645161) internal successors, (133), 30 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:16:48,012 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 264 transitions. [2021-08-21 18:16:48,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-08-21 18:16:48,012 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:16:48,012 INFO L512 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:16:48,052 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 18:16:48,224 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 18:16:48,225 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:16:48,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:16:48,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1409689875, now seen corresponding path program 60 times [2021-08-21 18:16:48,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:16:48,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592866247] [2021-08-21 18:16:48,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:16:48,225 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:16:48,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:16:48,488 INFO L134 CoverageAnalysis]: Checked inductivity of 991 backedges. 378 proven. 403 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-08-21 18:16:48,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:16:48,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592866247] [2021-08-21 18:16:48,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592866247] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:16:48,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094648893] [2021-08-21 18:16:48,489 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:16:48,489 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:16:48,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:16:48,489 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 18:16:48,490 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 18:16:56,006 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-08-21 18:16:56,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:16:56,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 18:16:56,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:16:56,498 INFO L134 CoverageAnalysis]: Checked inductivity of 991 backedges. 378 proven. 403 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-08-21 18:16:56,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094648893] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:16:56,498 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:16:56,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-08-21 18:16:56,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049788265] [2021-08-21 18:16:56,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 18:16:56,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:16:56,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 18:16:56,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:16:56,499 INFO L87 Difference]: Start difference. First operand 260 states and 264 transitions. Second operand has 17 states, 17 states have (on average 9.470588235294118) internal successors, (161), 16 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:16:56,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:16:56,532 INFO L93 Difference]: Finished difference Result 326 states and 330 transitions. [2021-08-21 18:16:56,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 18:16:56,532 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 9.470588235294118) internal successors, (161), 16 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 178 [2021-08-21 18:16:56,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:16:56,533 INFO L225 Difference]: With dead ends: 326 [2021-08-21 18:16:56,533 INFO L226 Difference]: Without dead ends: 269 [2021-08-21 18:16:56,533 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 95.3ms TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:16:56,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-08-21 18:16:56,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 265. [2021-08-21 18:16:56,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 1.018939393939394) internal successors, (269), 264 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:16:56,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 269 transitions. [2021-08-21 18:16:56,535 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 269 transitions. Word has length 178 [2021-08-21 18:16:56,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:16:56,536 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 269 transitions. [2021-08-21 18:16:56,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 9.470588235294118) internal successors, (161), 16 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:16:56,536 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 269 transitions. [2021-08-21 18:16:56,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-08-21 18:16:56,536 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:16:56,536 INFO L512 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:16:56,577 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 18:16:56,764 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 18:16:56,765 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:16:56,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:16:56,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1625962933, now seen corresponding path program 61 times [2021-08-21 18:16:56,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:16:56,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944387871] [2021-08-21 18:16:56,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:16:56,765 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:16:56,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:16:58,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1041 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:16:58,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:16:58,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944387871] [2021-08-21 18:16:58,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944387871] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:16:58,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143268295] [2021-08-21 18:16:58,733 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:16:58,733 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:16:58,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:16:58,734 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 18:16:58,734 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 18:17:05,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:17:05,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 60 conjunts are in the unsatisfiable core [2021-08-21 18:17:05,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:17:06,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-08-21 18:17:08,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-08-21 18:17:08,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1041 backedges. 0 proven. 794 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-08-21 18:17:08,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143268295] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:17:08,187 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:17:08,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 31] total 84 [2021-08-21 18:17:08,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180585059] [2021-08-21 18:17:08,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-08-21 18:17:08,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:17:08,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-08-21 18:17:08,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=6920, Unknown=0, NotChecked=0, Total=7140 [2021-08-21 18:17:08,188 INFO L87 Difference]: Start difference. First operand 265 states and 269 transitions. Second operand has 85 states, 85 states have (on average 3.7529411764705882) internal successors, (319), 84 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:17:12,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:17:12,689 INFO L93 Difference]: Finished difference Result 323 states and 327 transitions. [2021-08-21 18:17:12,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-08-21 18:17:12,690 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 3.7529411764705882) internal successors, (319), 84 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2021-08-21 18:17:12,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:17:12,690 INFO L225 Difference]: With dead ends: 323 [2021-08-21 18:17:12,690 INFO L226 Difference]: Without dead ends: 323 [2021-08-21 18:17:12,691 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 4861.6ms TimeCoverageRelationStatistics Valid=407, Invalid=14113, Unknown=0, NotChecked=0, Total=14520 [2021-08-21 18:17:12,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-08-21 18:17:12,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 184. [2021-08-21 18:17:12,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 1.0163934426229508) internal successors, (186), 183 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:17:12,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 186 transitions. [2021-08-21 18:17:12,693 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 186 transitions. Word has length 182 [2021-08-21 18:17:12,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:17:12,693 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 186 transitions. [2021-08-21 18:17:12,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 3.7529411764705882) internal successors, (319), 84 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:17:12,694 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 186 transitions. [2021-08-21 18:17:12,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-08-21 18:17:12,694 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:17:12,694 INFO L512 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:17:12,732 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-08-21 18:17:12,912 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 18:17:12,913 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:17:12,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:17:12,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1662626275, now seen corresponding path program 62 times [2021-08-21 18:17:12,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:17:12,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701634002] [2021-08-21 18:17:12,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:17:12,913 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:17:12,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:17:13,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 469 proven. 210 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-08-21 18:17:13,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:17:13,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701634002] [2021-08-21 18:17:13,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701634002] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:17:13,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471804137] [2021-08-21 18:17:13,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:17:13,126 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:17:13,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:17:13,127 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 18:17:13,128 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 18:17:20,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:17:20,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:17:20,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 18:17:20,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:17:21,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 469 proven. 210 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-08-21 18:17:21,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471804137] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:17:21,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:17:21,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-08-21 18:17:21,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213724051] [2021-08-21 18:17:21,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 18:17:21,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:17:21,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 18:17:21,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:17:21,093 INFO L87 Difference]: Start difference. First operand 184 states and 186 transitions. Second operand has 17 states, 17 states have (on average 8.117647058823529) internal successors, (138), 16 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 18:17:21,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:17:21,134 INFO L93 Difference]: Finished difference Result 263 states and 266 transitions. [2021-08-21 18:17:21,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 18:17:21,134 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 8.117647058823529) internal successors, (138), 16 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) Word has length 183 [2021-08-21 18:17:21,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:17:21,135 INFO L225 Difference]: With dead ends: 263 [2021-08-21 18:17:21,135 INFO L226 Difference]: Without dead ends: 192 [2021-08-21 18:17:21,135 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 96.3ms TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:17:21,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-08-21 18:17:21,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 187. [2021-08-21 18:17:21,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 1.0161290322580645) internal successors, (189), 186 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:17:21,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 189 transitions. [2021-08-21 18:17:21,137 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 189 transitions. Word has length 183 [2021-08-21 18:17:21,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:17:21,137 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 189 transitions. [2021-08-21 18:17:21,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 8.117647058823529) internal successors, (138), 16 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 18:17:21,137 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 189 transitions. [2021-08-21 18:17:21,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-08-21 18:17:21,137 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:17:21,137 INFO L512 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:17:21,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-08-21 18:17:21,364 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 18:17:21,365 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:17:21,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:17:21,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1298986322, now seen corresponding path program 63 times [2021-08-21 18:17:21,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:17:21,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250768140] [2021-08-21 18:17:21,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:17:21,365 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:17:21,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:17:31,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1094 backedges. 0 proven. 1091 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:17:31,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:17:31,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250768140] [2021-08-21 18:17:31,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250768140] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:17:31,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422540008] [2021-08-21 18:17:31,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:17:31,185 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:17:31,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:17:31,186 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 18:17:31,186 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 18:17:38,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-08-21 18:17:38,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:17:38,643 WARN L261 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 272 conjunts are in the unsatisfiable core [2021-08-21 18:17:38,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:17:52,127 INFO L354 Elim1Store]: treesize reduction 912, result has 0.1 percent of original size [2021-08-21 18:17:52,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 225 treesize of output 125 [2021-08-21 18:18:02,444 INFO L354 Elim1Store]: treesize reduction 912, result has 0.1 percent of original size [2021-08-21 18:18:02,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 158 treesize of output 58 [2021-08-21 18:18:03,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1094 backedges. 0 proven. 1091 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:18:03,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422540008] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:18:03,186 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:18:03,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 90] total 158 [2021-08-21 18:18:03,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389843686] [2021-08-21 18:18:03,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 159 states [2021-08-21 18:18:03,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:18:03,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2021-08-21 18:18:03,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=24699, Unknown=0, NotChecked=0, Total=25122 [2021-08-21 18:18:03,188 INFO L87 Difference]: Start difference. First operand 187 states and 189 transitions. Second operand has 159 states, 159 states have (on average 1.9433962264150944) internal successors, (309), 158 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:18:20,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:18:20,727 INFO L93 Difference]: Finished difference Result 334 states and 338 transitions. [2021-08-21 18:18:20,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-08-21 18:18:20,727 INFO L78 Accepts]: Start accepts. Automaton has has 159 states, 159 states have (on average 1.9433962264150944) internal successors, (309), 158 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 186 [2021-08-21 18:18:20,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:18:20,728 INFO L225 Difference]: With dead ends: 334 [2021-08-21 18:18:20,728 INFO L226 Difference]: Without dead ends: 329 [2021-08-21 18:18:20,730 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 112 SyntacticMatches, 17 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7779 ImplicationChecksByTransitivity, 27579.2ms TimeCoverageRelationStatistics Valid=696, Invalid=39504, Unknown=0, NotChecked=0, Total=40200 [2021-08-21 18:18:20,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-08-21 18:18:20,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 272. [2021-08-21 18:18:20,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 1.018450184501845) internal successors, (276), 271 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:18:20,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 276 transitions. [2021-08-21 18:18:20,732 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 276 transitions. Word has length 186 [2021-08-21 18:18:20,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:18:20,732 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 276 transitions. [2021-08-21 18:18:20,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 159 states, 159 states have (on average 1.9433962264150944) internal successors, (309), 158 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:18:20,733 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 276 transitions. [2021-08-21 18:18:20,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-08-21 18:18:20,733 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:18:20,733 INFO L512 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:18:20,773 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2021-08-21 18:18:20,960 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 18:18:20,961 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:18:20,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:18:20,961 INFO L82 PathProgramCache]: Analyzing trace with hash -813298179, now seen corresponding path program 64 times [2021-08-21 18:18:20,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:18:20,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834524706] [2021-08-21 18:18:20,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:18:20,961 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:18:21,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:18:21,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-08-21 18:18:21,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:18:21,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834524706] [2021-08-21 18:18:21,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834524706] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:18:21,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998053159] [2021-08-21 18:18:21,736 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:18:21,736 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:18:21,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:18:21,737 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 18:18:21,738 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 18:18:30,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:18:30,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:18:30,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 62 conjunts are in the unsatisfiable core [2021-08-21 18:18:30,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:18:30,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-21 18:18:30,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-08-21 18:18:30,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998053159] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:18:30,683 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:18:30,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-08-21 18:18:30,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623636352] [2021-08-21 18:18:30,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 18:18:30,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:18:30,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 18:18:30,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:18:30,684 INFO L87 Difference]: Start difference. First operand 272 states and 276 transitions. Second operand has 32 states, 32 states have (on average 4.28125) internal successors, (137), 31 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:18:31,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:18:31,979 INFO L93 Difference]: Finished difference Result 280 states and 284 transitions. [2021-08-21 18:18:31,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 18:18:31,979 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.28125) internal successors, (137), 31 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 189 [2021-08-21 18:18:31,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:18:31,980 INFO L225 Difference]: With dead ends: 280 [2021-08-21 18:18:31,980 INFO L226 Difference]: Without dead ends: 280 [2021-08-21 18:18:31,980 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 187 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 1410.5ms TimeCoverageRelationStatistics Valid=501, Invalid=3405, Unknown=0, NotChecked=0, Total=3906 [2021-08-21 18:18:31,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-08-21 18:18:31,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 277. [2021-08-21 18:18:31,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 1.0181159420289856) internal successors, (281), 276 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:18:31,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 281 transitions. [2021-08-21 18:18:31,989 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 281 transitions. Word has length 189 [2021-08-21 18:18:31,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:18:31,989 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 281 transitions. [2021-08-21 18:18:31,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.28125) internal successors, (137), 31 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:18:31,989 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 281 transitions. [2021-08-21 18:18:31,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-08-21 18:18:31,990 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:18:31,990 INFO L512 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:18:32,039 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 18:18:32,208 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 18:18:32,209 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:18:32,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:18:32,209 INFO L82 PathProgramCache]: Analyzing trace with hash 2092866159, now seen corresponding path program 65 times [2021-08-21 18:18:32,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:18:32,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141748651] [2021-08-21 18:18:32,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:18:32,209 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:18:32,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:18:32,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1151 backedges. 435 proven. 469 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-08-21 18:18:32,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:18:32,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141748651] [2021-08-21 18:18:32,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141748651] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:18:32,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4581264] [2021-08-21 18:18:32,549 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:18:32,550 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:18:32,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:18:32,565 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 18:18:32,605 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 18:18:41,507 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-08-21 18:18:41,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:18:41,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 18:18:41,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:18:41,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1151 backedges. 435 proven. 469 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-08-21 18:18:41,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4581264] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:18:41,866 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:18:41,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-08-21 18:18:41,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776272642] [2021-08-21 18:18:41,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:18:41,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:18:41,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:18:41,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:18:41,867 INFO L87 Difference]: Start difference. First operand 277 states and 281 transitions. Second operand has 18 states, 18 states have (on average 9.444444444444445) internal successors, (170), 17 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:18:41,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:18:41,907 INFO L93 Difference]: Finished difference Result 347 states and 351 transitions. [2021-08-21 18:18:41,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 18:18:41,920 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 9.444444444444445) internal successors, (170), 17 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-08-21 18:18:41,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:18:41,921 INFO L225 Difference]: With dead ends: 347 [2021-08-21 18:18:41,921 INFO L226 Difference]: Without dead ends: 286 [2021-08-21 18:18:41,921 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 77.6ms TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:18:41,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-08-21 18:18:41,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 282. [2021-08-21 18:18:41,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 1.0177935943060499) internal successors, (286), 281 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:18:41,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 286 transitions. [2021-08-21 18:18:41,924 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 286 transitions. Word has length 190 [2021-08-21 18:18:41,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:18:41,924 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 286 transitions. [2021-08-21 18:18:41,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 9.444444444444445) internal successors, (170), 17 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:18:41,924 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 286 transitions. [2021-08-21 18:18:41,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-08-21 18:18:41,924 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:18:41,925 INFO L512 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:18:41,988 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 18:18:42,125 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 18:18:42,125 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:18:42,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:18:42,125 INFO L82 PathProgramCache]: Analyzing trace with hash -961410803, now seen corresponding path program 66 times [2021-08-21 18:18:42,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:18:42,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890765076] [2021-08-21 18:18:42,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:18:42,126 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:18:42,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:18:42,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1205 backedges. 1 proven. 917 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2021-08-21 18:18:42,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:18:42,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890765076] [2021-08-21 18:18:42,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890765076] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:18:42,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217470342] [2021-08-21 18:18:42,878 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:18:42,878 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:18:42,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:18:42,889 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 18:18:42,932 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 18:18:52,025 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-08-21 18:18:52,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:18:52,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 118 conjunts are in the unsatisfiable core [2021-08-21 18:18:52,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:18:54,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:18:55,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:18:55,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1205 backedges. 0 proven. 1202 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:18:55,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217470342] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:18:55,373 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:18:55,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 59] total 90 [2021-08-21 18:18:55,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675427612] [2021-08-21 18:18:55,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2021-08-21 18:18:55,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:18:55,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-08-21 18:18:55,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=7952, Unknown=0, NotChecked=0, Total=8190 [2021-08-21 18:18:55,374 INFO L87 Difference]: Start difference. First operand 282 states and 286 transitions. Second operand has 91 states, 91 states have (on average 3.7362637362637363) internal successors, (340), 90 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:18:58,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:18:58,914 INFO L93 Difference]: Finished difference Result 344 states and 348 transitions. [2021-08-21 18:18:58,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-08-21 18:18:58,914 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 3.7362637362637363) internal successors, (340), 90 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 194 [2021-08-21 18:18:58,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:18:58,915 INFO L225 Difference]: With dead ends: 344 [2021-08-21 18:18:58,915 INFO L226 Difference]: Without dead ends: 344 [2021-08-21 18:18:58,916 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4073 ImplicationChecksByTransitivity, 3491.7ms TimeCoverageRelationStatistics Valid=418, Invalid=15332, Unknown=0, NotChecked=0, Total=15750 [2021-08-21 18:18:58,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-08-21 18:18:58,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 196. [2021-08-21 18:18:58,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.0153846153846153) internal successors, (198), 195 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:18:58,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 198 transitions. [2021-08-21 18:18:58,918 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 198 transitions. Word has length 194 [2021-08-21 18:18:58,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:18:58,919 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 198 transitions. [2021-08-21 18:18:58,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 3.7362637362637363) internal successors, (340), 90 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:18:58,919 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 198 transitions. [2021-08-21 18:18:58,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-08-21 18:18:58,919 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:18:58,919 INFO L512 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:18:58,961 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 18:18:59,140 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 18:18:59,141 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:18:59,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:18:59,141 INFO L82 PathProgramCache]: Analyzing trace with hash 131916021, now seen corresponding path program 67 times [2021-08-21 18:18:59,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:18:59,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612245095] [2021-08-21 18:18:59,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:18:59,141 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:18:59,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:18:59,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1222 backedges. 540 proven. 247 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-08-21 18:18:59,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:18:59,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612245095] [2021-08-21 18:18:59,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612245095] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:18:59,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089733320] [2021-08-21 18:18:59,539 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:18:59,539 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:18:59,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:18:59,540 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 18:18:59,541 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 18:19:08,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:19:08,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 18:19:08,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:19:08,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1222 backedges. 540 proven. 247 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-08-21 18:19:08,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089733320] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:19:08,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:19:08,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-08-21 18:19:08,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838894116] [2021-08-21 18:19:08,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:19:08,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:19:08,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:19:08,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:19:08,711 INFO L87 Difference]: Start difference. First operand 196 states and 198 transitions. Second operand has 18 states, 18 states have (on average 8.11111111111111) internal successors, (146), 17 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:19:08,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:19:08,756 INFO L93 Difference]: Finished difference Result 280 states and 283 transitions. [2021-08-21 18:19:08,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 18:19:08,756 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 8.11111111111111) internal successors, (146), 17 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-08-21 18:19:08,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:19:08,757 INFO L225 Difference]: With dead ends: 280 [2021-08-21 18:19:08,757 INFO L226 Difference]: Without dead ends: 204 [2021-08-21 18:19:08,757 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 281.6ms TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:19:08,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-08-21 18:19:08,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 199. [2021-08-21 18:19:08,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.0151515151515151) internal successors, (201), 198 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:19:08,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 201 transitions. [2021-08-21 18:19:08,759 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 201 transitions. Word has length 195 [2021-08-21 18:19:08,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:19:08,759 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 201 transitions. [2021-08-21 18:19:08,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 8.11111111111111) internal successors, (146), 17 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:19:08,759 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 201 transitions. [2021-08-21 18:19:08,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-08-21 18:19:08,759 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:19:08,761 INFO L512 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:19:08,801 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 18:19:08,988 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 18:19:08,989 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:19:08,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:19:08,989 INFO L82 PathProgramCache]: Analyzing trace with hash -510830422, now seen corresponding path program 68 times [2021-08-21 18:19:08,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:19:08,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2929596] [2021-08-21 18:19:08,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:19:08,989 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:19:09,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:19:23,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1262 backedges. 0 proven. 1259 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:19:23,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:19:23,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2929596] [2021-08-21 18:19:23,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2929596] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:19:23,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783184042] [2021-08-21 18:19:23,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:19:23,022 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:19:23,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:19:23,023 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 18:19:23,024 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 18:19:31,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:19:31,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:19:31,877 WARN L261 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 290 conjunts are in the unsatisfiable core [2021-08-21 18:19:31,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:19:46,804 INFO L354 Elim1Store]: treesize reduction 1092, result has 0.1 percent of original size [2021-08-21 18:19:46,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 247 treesize of output 135 [2021-08-21 18:19:58,401 INFO L354 Elim1Store]: treesize reduction 1092, result has 0.1 percent of original size [2021-08-21 18:19:58,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 174 treesize of output 62 [2021-08-21 18:19:59,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1262 backedges. 0 proven. 1259 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:19:59,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783184042] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:19:59,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:19:59,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 92] total 164 [2021-08-21 18:19:59,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946450927] [2021-08-21 18:19:59,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 165 states [2021-08-21 18:19:59,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:19:59,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 165 interpolants. [2021-08-21 18:19:59,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=26637, Unknown=0, NotChecked=0, Total=27060 [2021-08-21 18:19:59,227 INFO L87 Difference]: Start difference. First operand 199 states and 201 transitions. Second operand has 165 states, 165 states have (on average 2.0) internal successors, (330), 164 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:19,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:20:19,589 INFO L93 Difference]: Finished difference Result 355 states and 359 transitions. [2021-08-21 18:20:19,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-08-21 18:20:19,590 INFO L78 Accepts]: Start accepts. Automaton has has 165 states, 165 states have (on average 2.0) internal successors, (330), 164 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 198 [2021-08-21 18:20:19,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:20:19,590 INFO L225 Difference]: With dead ends: 355 [2021-08-21 18:20:19,590 INFO L226 Difference]: Without dead ends: 350 [2021-08-21 18:20:19,592 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 123 SyntacticMatches, 18 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8001 ImplicationChecksByTransitivity, 34215.0ms TimeCoverageRelationStatistics Valid=710, Invalid=43180, Unknown=0, NotChecked=0, Total=43890 [2021-08-21 18:20:19,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-08-21 18:20:19,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 289. [2021-08-21 18:20:19,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.0173611111111112) internal successors, (293), 288 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:19,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 293 transitions. [2021-08-21 18:20:19,595 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 293 transitions. Word has length 198 [2021-08-21 18:20:19,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:20:19,595 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 293 transitions. [2021-08-21 18:20:19,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 165 states, 165 states have (on average 2.0) internal successors, (330), 164 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:19,595 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 293 transitions. [2021-08-21 18:20:19,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-08-21 18:20:19,595 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:20:19,596 INFO L512 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:20:19,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-08-21 18:20:19,796 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 18:20:19,796 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:20:19,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:20:19,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1605908267, now seen corresponding path program 69 times [2021-08-21 18:20:19,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:20:19,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806842973] [2021-08-21 18:20:19,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:20:19,797 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:20:20,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:20,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1305 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-08-21 18:20:20,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:20:20,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806842973] [2021-08-21 18:20:20,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806842973] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:20,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337860896] [2021-08-21 18:20:20,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:20:20,731 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:20,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:20:20,749 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 18:20:20,750 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 18:20:30,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-08-21 18:20:30,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:20:30,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 66 conjunts are in the unsatisfiable core [2021-08-21 18:20:30,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:20:31,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:20:31,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1305 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-08-21 18:20:31,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337860896] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:31,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:20:31,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-08-21 18:20:31,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241673796] [2021-08-21 18:20:31,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-21 18:20:31,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:20:31,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-21 18:20:31,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 18:20:31,604 INFO L87 Difference]: Start difference. First operand 289 states and 293 transitions. Second operand has 34 states, 34 states have (on average 4.264705882352941) internal successors, (145), 33 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:33,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:20:33,006 INFO L93 Difference]: Finished difference Result 297 states and 301 transitions. [2021-08-21 18:20:33,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 18:20:33,006 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.264705882352941) internal successors, (145), 33 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 201 [2021-08-21 18:20:33,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:20:33,007 INFO L225 Difference]: With dead ends: 297 [2021-08-21 18:20:33,007 INFO L226 Difference]: Without dead ends: 297 [2021-08-21 18:20:33,007 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 199 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 1702.7ms TimeCoverageRelationStatistics Valid=558, Invalid=3864, Unknown=0, NotChecked=0, Total=4422 [2021-08-21 18:20:33,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-08-21 18:20:33,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 294. [2021-08-21 18:20:33,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 1.0170648464163823) internal successors, (298), 293 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:33,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 298 transitions. [2021-08-21 18:20:33,010 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 298 transitions. Word has length 201 [2021-08-21 18:20:33,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:20:33,010 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 298 transitions. [2021-08-21 18:20:33,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.264705882352941) internal successors, (145), 33 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:33,010 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 298 transitions. [2021-08-21 18:20:33,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-08-21 18:20:33,010 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:20:33,011 INFO L512 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:20:33,061 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 18:20:33,232 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 18:20:33,233 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:20:33,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:20:33,233 INFO L82 PathProgramCache]: Analyzing trace with hash 2026738119, now seen corresponding path program 70 times [2021-08-21 18:20:33,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:20:33,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040641934] [2021-08-21 18:20:33,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:20:33,233 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:20:33,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:33,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1323 backedges. 496 proven. 540 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2021-08-21 18:20:33,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:20:33,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040641934] [2021-08-21 18:20:33,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040641934] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:33,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035336914] [2021-08-21 18:20:33,619 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:20:33,619 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:33,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:20:33,620 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 18:20:33,621 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 18:20:43,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:20:43,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:20:43,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 18:20:43,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:20:44,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1323 backedges. 496 proven. 540 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2021-08-21 18:20:44,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035336914] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:44,371 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:20:44,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-08-21 18:20:44,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103458172] [2021-08-21 18:20:44,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 18:20:44,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:20:44,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 18:20:44,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:20:44,372 INFO L87 Difference]: Start difference. First operand 294 states and 298 transitions. Second operand has 19 states, 19 states have (on average 9.421052631578947) internal successors, (179), 18 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:44,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:20:44,411 INFO L93 Difference]: Finished difference Result 368 states and 372 transitions. [2021-08-21 18:20:44,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 18:20:44,411 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 9.421052631578947) internal successors, (179), 18 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 202 [2021-08-21 18:20:44,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:20:44,412 INFO L225 Difference]: With dead ends: 368 [2021-08-21 18:20:44,412 INFO L226 Difference]: Without dead ends: 303 [2021-08-21 18:20:44,412 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 160.2ms TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:20:44,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-08-21 18:20:44,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 299. [2021-08-21 18:20:44,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 1.016778523489933) internal successors, (303), 298 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:44,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 303 transitions. [2021-08-21 18:20:44,415 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 303 transitions. Word has length 202 [2021-08-21 18:20:44,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:20:44,415 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 303 transitions. [2021-08-21 18:20:44,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 9.421052631578947) internal successors, (179), 18 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:44,415 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 303 transitions. [2021-08-21 18:20:44,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-08-21 18:20:44,424 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:20:44,425 INFO L512 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:20:44,474 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 18:20:44,627 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 18:20:44,628 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:20:44,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:20:44,628 INFO L82 PathProgramCache]: Analyzing trace with hash -554778033, now seen corresponding path program 71 times [2021-08-21 18:20:44,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:20:44,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176556228] [2021-08-21 18:20:44,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:20:44,628 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:20:44,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:45,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1381 backedges. 1 proven. 1050 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-08-21 18:20:45,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:20:45,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176556228] [2021-08-21 18:20:45,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176556228] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:45,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123606727] [2021-08-21 18:20:45,529 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:20:45,530 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:45,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:20:45,530 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 18:20:45,531 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 18:20:55,991 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-08-21 18:20:55,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:20:55,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 126 conjunts are in the unsatisfiable core [2021-08-21 18:20:55,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:20:58,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:20:59,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:20:59,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1381 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:20:59,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123606727] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:59,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:20:59,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 63] total 96 [2021-08-21 18:20:59,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985212413] [2021-08-21 18:20:59,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-08-21 18:20:59,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:20:59,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-08-21 18:20:59,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=9058, Unknown=0, NotChecked=0, Total=9312 [2021-08-21 18:20:59,605 INFO L87 Difference]: Start difference. First operand 299 states and 303 transitions. Second operand has 97 states, 97 states have (on average 3.7216494845360826) internal successors, (361), 96 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:03,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:21:03,497 INFO L93 Difference]: Finished difference Result 365 states and 369 transitions. [2021-08-21 18:21:03,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-08-21 18:21:03,497 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 3.7216494845360826) internal successors, (361), 96 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 206 [2021-08-21 18:21:03,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:21:03,498 INFO L225 Difference]: With dead ends: 365 [2021-08-21 18:21:03,498 INFO L226 Difference]: Without dead ends: 365 [2021-08-21 18:21:03,500 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4625 ImplicationChecksByTransitivity, 3991.7ms TimeCoverageRelationStatistics Valid=444, Invalid=17378, Unknown=0, NotChecked=0, Total=17822 [2021-08-21 18:21:03,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-08-21 18:21:03,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 208. [2021-08-21 18:21:03,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 1.0144927536231885) internal successors, (210), 207 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:03,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 210 transitions. [2021-08-21 18:21:03,502 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 210 transitions. Word has length 206 [2021-08-21 18:21:03,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:21:03,502 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 210 transitions. [2021-08-21 18:21:03,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 3.7216494845360826) internal successors, (361), 96 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:03,502 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 210 transitions. [2021-08-21 18:21:03,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-08-21 18:21:03,503 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:21:03,503 INFO L512 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:21:03,551 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 18:21:03,703 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 18:21:03,703 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:21:03,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:21:03,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1376653495, now seen corresponding path program 72 times [2021-08-21 18:21:03,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:21:03,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427648874] [2021-08-21 18:21:03,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:21:03,704 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:21:03,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:21:04,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1399 backedges. 616 proven. 287 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-08-21 18:21:04,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:21:04,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427648874] [2021-08-21 18:21:04,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427648874] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:04,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166358620] [2021-08-21 18:21:04,068 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:21:04,068 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:04,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:21:04,069 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 18:21:04,069 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 18:21:14,539 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-08-21 18:21:14,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:21:14,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 18:21:14,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:21:14,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1399 backedges. 616 proven. 287 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-08-21 18:21:14,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166358620] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:14,976 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:21:14,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-08-21 18:21:14,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014410672] [2021-08-21 18:21:14,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 18:21:14,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:21:14,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 18:21:14,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:21:14,977 INFO L87 Difference]: Start difference. First operand 208 states and 210 transitions. Second operand has 19 states, 19 states have (on average 8.105263157894736) internal successors, (154), 18 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:15,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:21:15,020 INFO L93 Difference]: Finished difference Result 297 states and 300 transitions. [2021-08-21 18:21:15,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 18:21:15,021 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 8.105263157894736) internal successors, (154), 18 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 207 [2021-08-21 18:21:15,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:21:15,021 INFO L225 Difference]: With dead ends: 297 [2021-08-21 18:21:15,021 INFO L226 Difference]: Without dead ends: 216 [2021-08-21 18:21:15,021 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 155.2ms TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:21:15,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-08-21 18:21:15,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 211. [2021-08-21 18:21:15,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 1.0142857142857142) internal successors, (213), 210 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:15,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 213 transitions. [2021-08-21 18:21:15,023 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 213 transitions. Word has length 207 [2021-08-21 18:21:15,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:21:15,023 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 213 transitions. [2021-08-21 18:21:15,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 8.105263157894736) internal successors, (154), 18 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:15,023 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 213 transitions. [2021-08-21 18:21:15,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-08-21 18:21:15,024 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:21:15,024 INFO L512 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:21:15,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2021-08-21 18:21:15,238 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 18:21:15,239 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:21:15,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:21:15,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1368940308, now seen corresponding path program 73 times [2021-08-21 18:21:15,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:21:15,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862141602] [2021-08-21 18:21:15,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:21:15,239 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:21:15,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:21:30,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1442 backedges. 0 proven. 1439 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:21:30,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:21:30,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862141602] [2021-08-21 18:21:30,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862141602] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:30,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720276474] [2021-08-21 18:21:30,610 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:21:30,610 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:30,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:21:30,611 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 18:21:30,612 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 18:21:41,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:21:41,311 WARN L261 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 312 conjunts are in the unsatisfiable core [2021-08-21 18:21:41,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:21:59,834 INFO L354 Elim1Store]: treesize reduction 1260, result has 0.1 percent of original size [2021-08-21 18:21:59,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 265 treesize of output 145 [2021-08-21 18:22:11,825 INFO L354 Elim1Store]: treesize reduction 1260, result has 0.1 percent of original size [2021-08-21 18:22:11,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 186 treesize of output 66 [2021-08-21 18:22:12,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1442 backedges. 0 proven. 1439 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:22:12,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720276474] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:12,751 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:22:12,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 98] total 175 [2021-08-21 18:22:12,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427563357] [2021-08-21 18:22:12,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 176 states [2021-08-21 18:22:12,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:22:12,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2021-08-21 18:22:12,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=451, Invalid=30349, Unknown=0, NotChecked=0, Total=30800 [2021-08-21 18:22:12,754 INFO L87 Difference]: Start difference. First operand 211 states and 213 transitions. Second operand has 176 states, 176 states have (on average 1.9943181818181819) internal successors, (351), 175 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:36,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:22:36,019 INFO L93 Difference]: Finished difference Result 376 states and 380 transitions. [2021-08-21 18:22:36,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-08-21 18:22:36,020 INFO L78 Accepts]: Start accepts. Automaton has has 176 states, 176 states have (on average 1.9943181818181819) internal successors, (351), 175 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 210 [2021-08-21 18:22:36,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:22:36,021 INFO L225 Difference]: With dead ends: 376 [2021-08-21 18:22:36,021 INFO L226 Difference]: Without dead ends: 371 [2021-08-21 18:22:36,023 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 130 SyntacticMatches, 19 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9102 ImplicationChecksByTransitivity, 38219.9ms TimeCoverageRelationStatistics Valid=757, Invalid=49195, Unknown=0, NotChecked=0, Total=49952 [2021-08-21 18:22:36,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-08-21 18:22:36,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 306. [2021-08-21 18:22:36,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 1.0163934426229508) internal successors, (310), 305 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:36,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 310 transitions. [2021-08-21 18:22:36,032 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 310 transitions. Word has length 210 [2021-08-21 18:22:36,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:22:36,032 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 310 transitions. [2021-08-21 18:22:36,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 176 states, 176 states have (on average 1.9943181818181819) internal successors, (351), 175 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:36,032 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 310 transitions. [2021-08-21 18:22:36,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-08-21 18:22:36,036 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:22:36,037 INFO L512 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:22:36,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-08-21 18:22:36,237 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 18:22:36,237 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:22:36,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:22:36,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1996740457, now seen corresponding path program 74 times [2021-08-21 18:22:36,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:22:36,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141593318] [2021-08-21 18:22:36,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:22:36,238 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:22:36,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:22:37,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1488 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-08-21 18:22:37,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:22:37,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141593318] [2021-08-21 18:22:37,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141593318] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:37,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947908398] [2021-08-21 18:22:37,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:22:37,169 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:22:37,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:22:37,185 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 18:22:37,186 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 18:22:48,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:22:48,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:22:48,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 68 conjunts are in the unsatisfiable core [2021-08-21 18:22:48,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:22:49,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:22:49,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1488 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-08-21 18:22:49,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947908398] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:49,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:22:49,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-08-21 18:22:49,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754667320] [2021-08-21 18:22:49,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-21 18:22:49,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:22:49,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-21 18:22:49,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 18:22:49,482 INFO L87 Difference]: Start difference. First operand 306 states and 310 transitions. Second operand has 36 states, 36 states have (on average 4.25) internal successors, (153), 35 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:50,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:22:50,628 INFO L93 Difference]: Finished difference Result 314 states and 318 transitions. [2021-08-21 18:22:50,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 18:22:50,629 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.25) internal successors, (153), 35 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 213 [2021-08-21 18:22:50,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:22:50,630 INFO L225 Difference]: With dead ends: 314 [2021-08-21 18:22:50,630 INFO L226 Difference]: Without dead ends: 314 [2021-08-21 18:22:50,630 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 211 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 1504.4ms TimeCoverageRelationStatistics Valid=618, Invalid=4352, Unknown=0, NotChecked=0, Total=4970 [2021-08-21 18:22:50,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-08-21 18:22:50,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 311. [2021-08-21 18:22:50,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 1.0161290322580645) internal successors, (315), 310 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:50,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 315 transitions. [2021-08-21 18:22:50,633 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 315 transitions. Word has length 213 [2021-08-21 18:22:50,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:22:50,633 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 315 transitions. [2021-08-21 18:22:50,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.25) internal successors, (153), 35 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:50,633 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 315 transitions. [2021-08-21 18:22:50,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-08-21 18:22:50,634 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:22:50,634 INFO L512 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:22:50,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-08-21 18:22:50,860 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 18:22:50,861 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:22:50,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:22:50,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1122363657, now seen corresponding path program 75 times [2021-08-21 18:22:50,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:22:50,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498464726] [2021-08-21 18:22:50,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:22:50,861 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:22:50,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:22:51,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1507 backedges. 561 proven. 616 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-08-21 18:22:51,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:22:51,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498464726] [2021-08-21 18:22:51,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498464726] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:51,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220867577] [2021-08-21 18:22:51,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:22:51,108 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:22:51,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:22:51,110 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 18:22:51,111 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 18:23:03,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-08-21 18:23:03,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:23:03,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 18:23:03,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:23:03,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1507 backedges. 561 proven. 616 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-08-21 18:23:03,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220867577] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:23:03,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:23:03,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 19 [2021-08-21 18:23:03,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961510219] [2021-08-21 18:23:03,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 18:23:03,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:23:03,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 18:23:03,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:23:03,696 INFO L87 Difference]: Start difference. First operand 311 states and 315 transitions. Second operand has 20 states, 20 states have (on average 9.4) internal successors, (188), 19 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:23:03,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:23:03,734 INFO L93 Difference]: Finished difference Result 389 states and 393 transitions. [2021-08-21 18:23:03,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 18:23:03,735 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 9.4) internal successors, (188), 19 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 214 [2021-08-21 18:23:03,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:23:03,735 INFO L225 Difference]: With dead ends: 389 [2021-08-21 18:23:03,735 INFO L226 Difference]: Without dead ends: 320 [2021-08-21 18:23:03,735 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 114.8ms TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:23:03,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-08-21 18:23:03,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 316. [2021-08-21 18:23:03,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 1.0158730158730158) internal successors, (320), 315 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:23:03,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 320 transitions. [2021-08-21 18:23:03,738 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 320 transitions. Word has length 214 [2021-08-21 18:23:03,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:23:03,738 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 320 transitions. [2021-08-21 18:23:03,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 9.4) internal successors, (188), 19 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:23:03,738 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 320 transitions. [2021-08-21 18:23:03,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-08-21 18:23:03,739 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:23:03,739 INFO L512 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:23:03,795 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 18:23:03,964 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 18:23:03,964 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:23:03,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:23:03,964 INFO L82 PathProgramCache]: Analyzing trace with hash -2005058585, now seen corresponding path program 76 times [2021-08-21 18:23:03,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:23:03,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219426735] [2021-08-21 18:23:03,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:23:03,965 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:23:04,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:23:04,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1569 backedges. 1 proven. 1192 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-08-21 18:23:04,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:23:04,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219426735] [2021-08-21 18:23:04,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219426735] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:23:04,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302640493] [2021-08-21 18:23:04,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:23:04,814 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:23:04,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:23:04,815 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 18:23:04,816 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 18:23:16,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:23:16,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:23:16,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 70 conjunts are in the unsatisfiable core [2021-08-21 18:23:16,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:23:17,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-08-21 18:23:17,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1569 backedges. 0 proven. 1193 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-08-21 18:23:17,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302640493] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:23:17,698 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:23:17,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-08-21 18:23:17,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428419574] [2021-08-21 18:23:17,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-21 18:23:17,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:23:17,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-21 18:23:17,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1405, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 18:23:17,699 INFO L87 Difference]: Start difference. First operand 316 states and 320 transitions. Second operand has 39 states, 39 states have (on average 4.487179487179487) internal successors, (175), 38 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:23:18,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:23:18,910 INFO L93 Difference]: Finished difference Result 384 states and 388 transitions. [2021-08-21 18:23:18,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-08-21 18:23:18,910 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.487179487179487) internal successors, (175), 38 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 218 [2021-08-21 18:23:18,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:23:18,911 INFO L225 Difference]: With dead ends: 384 [2021-08-21 18:23:18,911 INFO L226 Difference]: Without dead ends: 384 [2021-08-21 18:23:18,912 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 214 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 1159.3ms TimeCoverageRelationStatistics Valid=164, Invalid=3258, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 18:23:18,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-08-21 18:23:18,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 220. [2021-08-21 18:23:18,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 1.0136986301369864) internal successors, (222), 219 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:23:18,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 222 transitions. [2021-08-21 18:23:18,914 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 222 transitions. Word has length 218 [2021-08-21 18:23:18,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:23:18,914 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 222 transitions. [2021-08-21 18:23:18,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 4.487179487179487) internal successors, (175), 38 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:23:18,914 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 222 transitions. [2021-08-21 18:23:18,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-08-21 18:23:18,915 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:23:18,915 INFO L512 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:23:18,968 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 18:23:19,124 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 18:23:19,125 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:23:19,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:23:19,125 INFO L82 PathProgramCache]: Analyzing trace with hash -556948017, now seen corresponding path program 77 times [2021-08-21 18:23:19,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:23:19,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188154375] [2021-08-21 18:23:19,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:23:19,125 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:23:19,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:23:19,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1588 backedges. 697 proven. 330 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2021-08-21 18:23:19,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:23:19,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188154375] [2021-08-21 18:23:19,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188154375] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:23:19,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22488679] [2021-08-21 18:23:19,407 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:23:19,407 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:23:19,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:23:19,408 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 18:23:19,409 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 18:23:31,775 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-08-21 18:23:31,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:23:31,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 18:23:31,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:23:32,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1588 backedges. 697 proven. 330 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2021-08-21 18:23:32,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22488679] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:23:32,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:23:32,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 19 [2021-08-21 18:23:32,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743767530] [2021-08-21 18:23:32,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 18:23:32,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:23:32,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 18:23:32,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:23:32,271 INFO L87 Difference]: Start difference. First operand 220 states and 222 transitions. Second operand has 20 states, 20 states have (on average 8.1) internal successors, (162), 19 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:23:32,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:23:32,319 INFO L93 Difference]: Finished difference Result 314 states and 317 transitions. [2021-08-21 18:23:32,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 18:23:32,319 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 8.1) internal successors, (162), 19 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 219 [2021-08-21 18:23:32,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:23:32,320 INFO L225 Difference]: With dead ends: 314 [2021-08-21 18:23:32,320 INFO L226 Difference]: Without dead ends: 228 [2021-08-21 18:23:32,320 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 141.8ms TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:23:32,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-08-21 18:23:32,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 223. [2021-08-21 18:23:32,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.0135135135135136) internal successors, (225), 222 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:23:32,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 225 transitions. [2021-08-21 18:23:32,322 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 225 transitions. Word has length 219 [2021-08-21 18:23:32,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:23:32,322 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 225 transitions. [2021-08-21 18:23:32,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 8.1) internal successors, (162), 19 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:23:32,322 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 225 transitions. [2021-08-21 18:23:32,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-08-21 18:23:32,322 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:23:32,323 INFO L512 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:23:32,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-08-21 18:23:32,548 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 18:23:32,549 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:23:32,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:23:32,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1838182780, now seen corresponding path program 78 times [2021-08-21 18:23:32,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:23:32,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098750564] [2021-08-21 18:23:32,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:23:32,549 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:23:32,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:23:49,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1634 backedges. 0 proven. 1631 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:23:49,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:23:49,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098750564] [2021-08-21 18:23:49,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098750564] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:23:49,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125658814] [2021-08-21 18:23:49,785 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:23:49,785 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:23:49,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:23:49,786 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 18:23:49,787 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 18:24:02,063 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-08-21 18:24:02,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:24:02,067 WARN L261 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 334 conjunts are in the unsatisfiable core [2021-08-21 18:24:02,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2021-08-21 18:24:15,684 WARN L223 SmtUtils]: Removed 29 from assertion stack [2021-08-21 18:24:15,691 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 18:24:15,701 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 18:24:15,701 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 18:24:15,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-08-21 18:24:15,891 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 18:24:15,892 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 223 with TraceHistMax 17,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 103 for 18ms.. [2021-08-21 18:24:15,893 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 18:24:15,893 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 18:24:15,893 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-21 18:24:15,896 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 18:24:15,896 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 18:24:15,897 INFO L202 PluginConnector]: Adding new model queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 06:24:15 BasicIcfg [2021-08-21 18:24:15,897 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 18:24:15,897 INFO L168 Benchmark]: Toolchain (without parser) took 855716.84 ms. Allocated memory was 190.8 MB in the beginning and 2.7 GB in the end (delta: 2.5 GB). Free memory was 171.9 MB in the beginning and 771.0 MB in the end (delta: -599.1 MB). Peak memory consumption was 1.9 GB. Max. memory is 8.0 GB. [2021-08-21 18:24:15,897 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 190.8 MB. Free memory is still 173.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 18:24:15,897 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.07 ms. Allocated memory is still 190.8 MB. Free memory was 171.9 MB in the beginning and 170.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-08-21 18:24:15,897 INFO L168 Benchmark]: Boogie Preprocessor took 15.76 ms. Allocated memory is still 190.8 MB. Free memory was 170.4 MB in the beginning and 169.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 18:24:15,898 INFO L168 Benchmark]: RCFGBuilder took 300.42 ms. Allocated memory is still 190.8 MB. Free memory was 169.3 MB in the beginning and 174.3 MB in the end (delta: -5.0 MB). Peak memory consumption was 17.7 MB. Max. memory is 8.0 GB. [2021-08-21 18:24:15,898 INFO L168 Benchmark]: TraceAbstraction took 855371.71 ms. Allocated memory was 190.8 MB in the beginning and 2.7 GB in the end (delta: 2.5 GB). Free memory was 173.8 MB in the beginning and 771.0 MB in the end (delta: -597.3 MB). Peak memory consumption was 1.9 GB. Max. memory is 8.0 GB. [2021-08-21 18:24:15,898 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 0.12 ms. Allocated memory is still 190.8 MB. Free memory is still 173.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 25.07 ms. Allocated memory is still 190.8 MB. Free memory was 171.9 MB in the beginning and 170.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 15.76 ms. Allocated memory is still 190.8 MB. Free memory was 170.4 MB in the beginning and 169.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 300.42 ms. Allocated memory is still 190.8 MB. Free memory was 169.3 MB in the beginning and 174.3 MB in the end (delta: -5.0 MB). Peak memory consumption was 17.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 855371.71 ms. Allocated memory was 190.8 MB in the beginning and 2.7 GB in the end (delta: 2.5 GB). Free memory was 173.8 MB in the beginning and 771.0 MB in the end (delta: -597.3 MB). Peak memory consumption was 1.9 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 1443, positive: 1363, positive conditional: 1363, positive unconditional: 0, negative: 80, negative conditional: 80, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 1363, positive: 1363, positive conditional: 0, positive unconditional: 1363, 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: 239, positive: 239, positive conditional: 0, positive unconditional: 239, 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: 239, positive: 236, positive conditional: 0, positive unconditional: 236, negative: 3, negative conditional: 0, negative unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 3, positive: 3, positive conditional: 0, positive unconditional: 3, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 21, positive: 21, positive conditional: 0, positive unconditional: 21, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1363, positive: 1124, positive conditional: 0, positive unconditional: 1124, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 239, unknown conditional: 0, unknown unconditional: 239] , Statistics on independence cache: Total cache size (in pairs): 239, Positive cache size: 239, Positive conditional cache size: 0, Positive unconditional cache size: 239, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Independence queries for same thread: 80 - 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: 88]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 223 with TraceHistMax 17,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 103 for 18ms.. - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 223 with TraceHistMax 17,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 103 for 18ms.. - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 223 with TraceHistMax 17,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 103 for 18ms.. - TimeoutResultAtElement [Line: 82]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 223 with TraceHistMax 17,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 103 for 18ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 63 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 855241.7ms, OverallIterations: 83, TraceHistogramMax: 17, EmptinessCheckTime: 83.6ms, AutomataDifference: 162180.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 185.6ms, PartialOrderReductionTime: 160.7ms, HoareTripleCheckerStatistics: 5170 SDtfs, 6694 SDslu, 131105 SDs, 0 SdLazy, 184038 SolverSat, 3103 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 79117.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13317 GetRequests, 9178 SyntacticMatches, 226 SemanticMatches, 3913 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80142 ImplicationChecksByTransitivity, 245376.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=659occurred in iteration=0, InterpolantAutomatonStates: 2700, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 229.9ms AutomataMinimizationTime, 82 MinimizatonAttempts, 2452 StatesRemovedByMinimization, 80 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 885.1ms SsaConstructionTime, 4734.1ms SatisfiabilityAnalysisTime, 314514.7ms InterpolantComputationTime, 20015 NumberOfCodeBlocks, 20015 NumberOfCodeBlocksAsserted, 541 NumberOfCheckSat, 19853 ConstructedInterpolants, 134 QuantifiedInterpolants, 355860 SizeOfPredicates, 488 NumberOfNonLiveVariables, 24168 ConjunctsInSsa, 4809 ConjunctsInUnsatCore, 162 InterpolantComputations, 3 PerfectInterpolantSequences, 34052/88449 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