/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/prod-cons.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 20:06:03,734 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 20:06:03,736 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 20:06:03,761 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-06 20:06:03,762 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-06 20:06:03,763 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-06 20:06:03,764 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-06 20:06:03,766 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-06 20:06:03,767 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-06 20:06:03,768 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-06 20:06:03,769 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-06 20:06:03,770 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-06 20:06:03,770 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-06 20:06:03,771 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-06 20:06:03,772 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-06 20:06:03,773 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-06 20:06:03,774 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-06 20:06:03,775 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-06 20:06:03,776 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-06 20:06:03,778 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-06 20:06:03,779 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-06 20:06:03,780 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-06 20:06:03,781 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-06 20:06:03,782 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-06 20:06:03,789 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-06 20:06:03,790 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-06 20:06:03,790 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-06 20:06:03,791 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-06 20:06:03,791 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-06 20:06:03,792 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-06 20:06:03,792 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-06 20:06:03,793 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-06 20:06:03,793 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-06 20:06:03,794 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-06 20:06:03,795 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-06 20:06:03,795 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-06 20:06:03,796 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-06 20:06:03,804 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-06 20:06:03,804 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-06 20:06:03,805 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-06 20:06:03,806 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-06 20:06:03,807 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf [2021-08-06 20:06:03,827 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 20:06:03,827 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 20:06:03,828 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 20:06:03,828 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 20:06:03,828 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 20:06:03,829 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 20:06:03,829 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 20:06:03,829 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 20:06:03,829 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 20:06:03,829 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 20:06:03,829 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 20:06:03,829 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 20:06:03,829 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 20:06:03,830 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 20:06:03,830 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 20:06:03,830 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 20:06:03,830 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 20:06:03,830 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 20:06:03,830 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 20:06:03,830 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 20:06:03,830 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 20:06:03,830 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 20:06:03,830 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 20:06:03,831 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 20:06:03,831 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 20:06:03,831 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 20:06:03,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 20:06:03,831 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 20:06:03,831 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 20:06:03,831 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-06 20:06:03,831 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 20:06:04,281 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 20:06:04,314 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 20:06:04,326 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 20:06:04,327 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-06 20:06:04,328 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-06 20:06:04,329 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/prod-cons.wvr.bpl [2021-08-06 20:06:04,344 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/prod-cons.wvr.bpl' [2021-08-06 20:06:04,384 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 20:06:04,385 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-06 20:06:04,400 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 20:06:04,401 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 20:06:04,401 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 20:06:04,411 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:06:04" (1/1) ... [2021-08-06 20:06:04,417 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:06:04" (1/1) ... [2021-08-06 20:06:04,444 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 20:06:04,445 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 20:06:04,445 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 20:06:04,445 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 20:06:04,452 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:06:04" (1/1) ... [2021-08-06 20:06:04,466 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:06:04" (1/1) ... [2021-08-06 20:06:04,467 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:06:04" (1/1) ... [2021-08-06 20:06:04,467 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:06:04" (1/1) ... [2021-08-06 20:06:04,469 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:06:04" (1/1) ... [2021-08-06 20:06:04,471 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:06:04" (1/1) ... [2021-08-06 20:06:04,472 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:06:04" (1/1) ... [2021-08-06 20:06:04,473 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 20:06:04,474 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 20:06:04,474 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 20:06:04,474 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 20:06:04,479 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:06:04" (1/1) ... [2021-08-06 20:06:04,484 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 20:06:04,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:06:04,524 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-06 20:06:04,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-06 20:06:04,591 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-06 20:06:04,592 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-06 20:06:04,592 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-06 20:06:04,592 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-06 20:06:04,592 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-06 20:06:04,592 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-06 20:06:04,592 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-06 20:06:04,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 20:06:04,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 20:06:04,593 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-06 20:06:04,593 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-06 20:06:04,593 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-06 20:06:04,601 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-06 20:06:04,885 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 20:06:04,885 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-06 20:06:04,887 INFO L202 PluginConnector]: Adding new model prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 08:06:04 BoogieIcfgContainer [2021-08-06 20:06:04,887 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 20:06:04,889 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 20:06:04,889 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 20:06:04,904 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 20:06:04,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:06:04" (1/2) ... [2021-08-06 20:06:04,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e311c16 and model type prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 08:06:04, skipping insertion in model container [2021-08-06 20:06:04,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 08:06:04" (2/2) ... [2021-08-06 20:06:04,907 INFO L111 eAbstractionObserver]: Analyzing ICFG prod-cons.wvr.bpl [2021-08-06 20:06:04,911 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 20:06:04,911 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 20:06:04,912 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 20:06:04,912 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 20:06:05,001 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-06 20:06:05,072 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 20:06:05,077 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-06 20:06:05,078 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-06 20:06:05,217 INFO L276 IsEmpty]: Start isEmpty. Operand has 132 states, 91 states have (on average 2.021978021978022) internal successors, (184), 131 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) [2021-08-06 20:06:05,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 20:06:05,238 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:05,238 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:06:05,239 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:06:05,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:05,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1798569311, now seen corresponding path program 1 times [2021-08-06 20:06:05,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:05,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816516611] [2021-08-06 20:06:05,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:05,260 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:05,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:05,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:05,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:05,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816516611] [2021-08-06 20:06:05,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816516611] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:06:05,418 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:06:05,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 20:06:05,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054701787] [2021-08-06 20:06:05,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 20:06:05,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:06:05,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 20:06:05,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 20:06:05,441 INFO L87 Difference]: Start difference. First operand has 132 states, 91 states have (on average 2.021978021978022) internal successors, (184), 131 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) Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:05,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:05,494 INFO L93 Difference]: Finished difference Result 172 states and 224 transitions. [2021-08-06 20:06:05,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 20:06:05,496 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 20:06:05,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:05,505 INFO L225 Difference]: With dead ends: 172 [2021-08-06 20:06:05,505 INFO L226 Difference]: Without dead ends: 64 [2021-08-06 20:06:05,508 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 20:06:05,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-06 20:06:05,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-08-06 20:06:05,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.5238095238095237) internal successors, (96), 63 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) [2021-08-06 20:06:05,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 96 transitions. [2021-08-06 20:06:05,553 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 96 transitions. Word has length 19 [2021-08-06 20:06:05,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:06:05,554 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 96 transitions. [2021-08-06 20:06:05,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:05,555 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 96 transitions. [2021-08-06 20:06:05,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 20:06:05,557 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:05,557 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:06:05,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 20:06:05,557 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:06:05,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:05,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1404113307, now seen corresponding path program 2 times [2021-08-06 20:06:05,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:05,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882398276] [2021-08-06 20:06:05,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:05,559 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:05,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:05,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:05,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:05,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882398276] [2021-08-06 20:06:05,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882398276] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:06:05,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:06:05,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 20:06:05,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643959734] [2021-08-06 20:06:05,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 20:06:05,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:06:05,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 20:06:05,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-06 20:06:05,648 INFO L87 Difference]: Start difference. First operand 64 states and 96 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:05,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:05,722 INFO L93 Difference]: Finished difference Result 108 states and 158 transitions. [2021-08-06 20:06:05,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 20:06:05,724 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 20:06:05,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:05,734 INFO L225 Difference]: With dead ends: 108 [2021-08-06 20:06:05,734 INFO L226 Difference]: Without dead ends: 88 [2021-08-06 20:06:05,735 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 31.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-06 20:06:05,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-08-06 20:06:05,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 82. [2021-08-06 20:06:05,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.5185185185185186) internal successors, (123), 81 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) [2021-08-06 20:06:05,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 123 transitions. [2021-08-06 20:06:05,743 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 123 transitions. Word has length 19 [2021-08-06 20:06:05,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:06:05,743 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 123 transitions. [2021-08-06 20:06:05,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:05,744 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 123 transitions. [2021-08-06 20:06:05,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 20:06:05,754 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:05,754 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:06:05,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-06 20:06:05,755 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:06:05,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:05,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1364646154, now seen corresponding path program 1 times [2021-08-06 20:06:05,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:05,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324962957] [2021-08-06 20:06:05,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:05,758 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:05,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:05,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:05,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:05,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324962957] [2021-08-06 20:06:05,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324962957] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:06:05,820 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:06:05,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 20:06:05,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982763196] [2021-08-06 20:06:05,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 20:06:05,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:06:05,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 20:06:05,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 20:06:05,822 INFO L87 Difference]: Start difference. First operand 82 states and 123 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:05,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:05,832 INFO L93 Difference]: Finished difference Result 96 states and 139 transitions. [2021-08-06 20:06:05,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 20:06:05,835 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 20:06:05,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:05,836 INFO L225 Difference]: With dead ends: 96 [2021-08-06 20:06:05,836 INFO L226 Difference]: Without dead ends: 88 [2021-08-06 20:06:05,837 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 20:06:05,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-08-06 20:06:05,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2021-08-06 20:06:05,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.5116279069767442) internal successors, (130), 86 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) [2021-08-06 20:06:05,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 130 transitions. [2021-08-06 20:06:05,851 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 130 transitions. Word has length 22 [2021-08-06 20:06:05,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:06:05,851 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 130 transitions. [2021-08-06 20:06:05,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:05,851 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 130 transitions. [2021-08-06 20:06:05,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 20:06:05,852 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:05,852 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] [2021-08-06 20:06:05,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-06 20:06:05,853 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:06:05,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:05,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1641446814, now seen corresponding path program 1 times [2021-08-06 20:06:05,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:05,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377777391] [2021-08-06 20:06:05,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:05,854 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:05,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:06,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:06,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:06,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377777391] [2021-08-06 20:06:06,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377777391] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:06,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651632778] [2021-08-06 20:06:06,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:06,071 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:06,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:06:06,081 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:06:06,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-06 20:06:06,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:06,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 20:06:06,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:06:06,587 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 [2021-08-06 20:06:06,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:06,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651632778] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:06,890 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:06:06,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-06 20:06:06,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782885912] [2021-08-06 20:06:06,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:06:06,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:06:06,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:06:06,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:06:06,897 INFO L87 Difference]: Start difference. First operand 87 states and 130 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:07,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:07,237 INFO L93 Difference]: Finished difference Result 177 states and 261 transitions. [2021-08-06 20:06:07,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 20:06:07,237 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 20:06:07,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:07,241 INFO L225 Difference]: With dead ends: 177 [2021-08-06 20:06:07,241 INFO L226 Difference]: Without dead ends: 142 [2021-08-06 20:06:07,242 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 314.1ms TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2021-08-06 20:06:07,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-08-06 20:06:07,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 111. [2021-08-06 20:06:07,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.481818181818182) internal successors, (163), 110 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:07,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 163 transitions. [2021-08-06 20:06:07,264 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 163 transitions. Word has length 25 [2021-08-06 20:06:07,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:06:07,264 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 163 transitions. [2021-08-06 20:06:07,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:07,264 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 163 transitions. [2021-08-06 20:06:07,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:06:07,267 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:07,267 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:06:07,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-06 20:06:07,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:07,494 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:06:07,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:07,495 INFO L82 PathProgramCache]: Analyzing trace with hash 478308333, now seen corresponding path program 2 times [2021-08-06 20:06:07,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:07,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807399133] [2021-08-06 20:06:07,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:07,495 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:07,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:07,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:07,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:07,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807399133] [2021-08-06 20:06:07,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807399133] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:07,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49519053] [2021-08-06 20:06:07,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:06:07,599 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:07,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:06:07,601 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:06:07,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-06 20:06:07,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:06:07,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:06:07,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-06 20:06:07,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:06:07,887 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:06:07,888 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:06:07,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:07,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49519053] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:07,967 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:06:07,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-06 20:06:07,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585946709] [2021-08-06 20:06:07,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 20:06:07,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:06:07,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 20:06:07,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-06 20:06:07,968 INFO L87 Difference]: Start difference. First operand 111 states and 163 transitions. Second operand has 5 states, 5 states have (on average 6.6) 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) [2021-08-06 20:06:07,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:07,980 INFO L93 Difference]: Finished difference Result 271 states and 389 transitions. [2021-08-06 20:06:07,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 20:06:07,980 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) 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 28 [2021-08-06 20:06:07,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:07,982 INFO L225 Difference]: With dead ends: 271 [2021-08-06 20:06:07,982 INFO L226 Difference]: Without dead ends: 245 [2021-08-06 20:06:07,982 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.4ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-06 20:06:07,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-08-06 20:06:07,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 188. [2021-08-06 20:06:07,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.5401069518716577) internal successors, (288), 187 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) [2021-08-06 20:06:07,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 288 transitions. [2021-08-06 20:06:07,995 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 288 transitions. Word has length 28 [2021-08-06 20:06:07,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:06:07,995 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 288 transitions. [2021-08-06 20:06:07,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) 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) [2021-08-06 20:06:07,996 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 288 transitions. [2021-08-06 20:06:07,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:06:07,997 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:07,997 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:06:08,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-06 20:06:08,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:08,206 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:06:08,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:08,206 INFO L82 PathProgramCache]: Analyzing trace with hash 806793029, now seen corresponding path program 3 times [2021-08-06 20:06:08,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:08,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034211582] [2021-08-06 20:06:08,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:08,207 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:08,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:08,535 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 20:06:08,541 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 20:06:08,589 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:08,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:08,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034211582] [2021-08-06 20:06:08,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034211582] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:08,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333949907] [2021-08-06 20:06:08,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:06:08,592 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:08,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:06:08,593 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:06:08,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-06 20:06:08,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:06:08,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:06:08,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 20:06:08,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:06:09,244 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:06:09,245 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 25 treesize of output 13 [2021-08-06 20:06:09,384 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:09,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333949907] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:09,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:06:09,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-06 20:06:09,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120862578] [2021-08-06 20:06:09,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 20:06:09,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:06:09,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 20:06:09,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-08-06 20:06:09,386 INFO L87 Difference]: Start difference. First operand 188 states and 288 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:10,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:10,170 INFO L93 Difference]: Finished difference Result 343 states and 503 transitions. [2021-08-06 20:06:10,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 20:06:10,170 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 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 31 [2021-08-06 20:06:10,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:10,172 INFO L225 Difference]: With dead ends: 343 [2021-08-06 20:06:10,172 INFO L226 Difference]: Without dead ends: 317 [2021-08-06 20:06:10,173 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 806.0ms TimeCoverageRelationStatistics Valid=288, Invalid=1272, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 20:06:10,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-08-06 20:06:10,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 212. [2021-08-06 20:06:10,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.5213270142180095) internal successors, (321), 211 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:10,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 321 transitions. [2021-08-06 20:06:10,182 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 321 transitions. Word has length 31 [2021-08-06 20:06:10,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:06:10,183 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 321 transitions. [2021-08-06 20:06:10,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:10,183 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 321 transitions. [2021-08-06 20:06:10,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:06:10,184 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:10,184 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:06:10,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-06 20:06:10,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:10,397 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:06:10,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:10,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1314120487, now seen corresponding path program 4 times [2021-08-06 20:06:10,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:10,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131780358] [2021-08-06 20:06:10,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:10,398 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:10,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:10,653 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 73.7 percent of original size [2021-08-06 20:06:10,658 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 73.7 percent of original size [2021-08-06 20:06:10,704 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 68.6 percent of original size [2021-08-06 20:06:10,707 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 68.6 percent of original size [2021-08-06 20:06:10,757 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 20:06:10,758 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 20:06:10,814 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:10,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:10,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131780358] [2021-08-06 20:06:10,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131780358] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:10,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019273954] [2021-08-06 20:06:10,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:06:10,814 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:10,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:06:10,820 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:06:10,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-06 20:06:10,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:06:10,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:06:10,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 20:06:10,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:06:11,542 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:06:11,542 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 25 treesize of output 13 [2021-08-06 20:06:11,696 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:11,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019273954] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:11,697 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:06:11,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-06 20:06:11,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658040507] [2021-08-06 20:06:11,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 20:06:11,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:06:11,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 20:06:11,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-08-06 20:06:11,699 INFO L87 Difference]: Start difference. First operand 212 states and 321 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:12,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:12,632 INFO L93 Difference]: Finished difference Result 407 states and 607 transitions. [2021-08-06 20:06:12,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 20:06:12,633 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 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 31 [2021-08-06 20:06:12,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:12,636 INFO L225 Difference]: With dead ends: 407 [2021-08-06 20:06:12,636 INFO L226 Difference]: Without dead ends: 371 [2021-08-06 20:06:12,637 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 896.4ms TimeCoverageRelationStatistics Valid=360, Invalid=1532, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 20:06:12,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-08-06 20:06:12,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 224. [2021-08-06 20:06:12,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.5246636771300448) internal successors, (340), 223 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) [2021-08-06 20:06:12,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 340 transitions. [2021-08-06 20:06:12,649 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 340 transitions. Word has length 31 [2021-08-06 20:06:12,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:06:12,649 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 340 transitions. [2021-08-06 20:06:12,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:12,649 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 340 transitions. [2021-08-06 20:06:12,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:06:12,650 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:12,650 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:06:12,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-06 20:06:12,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:12,875 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:06:12,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:12,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1825010339, now seen corresponding path program 5 times [2021-08-06 20:06:12,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:12,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525636724] [2021-08-06 20:06:12,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:12,876 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:12,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:13,033 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 56.9 percent of original size [2021-08-06 20:06:13,052 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 56.9 percent of original size [2021-08-06 20:06:13,075 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 72.7 percent of original size [2021-08-06 20:06:13,079 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 72.7 percent of original size [2021-08-06 20:06:13,092 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 72.7 percent of original size [2021-08-06 20:06:13,096 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 72.7 percent of original size [2021-08-06 20:06:13,160 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:06:13,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:13,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525636724] [2021-08-06 20:06:13,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525636724] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:13,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414293189] [2021-08-06 20:06:13,165 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:06:13,165 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:13,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:06:13,166 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:06:13,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-06 20:06:13,353 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:06:13,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:06:13,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 20:06:13,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:06:14,333 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-06 20:06:14,333 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 36 treesize of output 31 [2021-08-06 20:06:14,460 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:14,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414293189] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:14,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:06:14,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-08-06 20:06:14,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276963544] [2021-08-06 20:06:14,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:06:14,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:06:14,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:06:14,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:06:14,462 INFO L87 Difference]: Start difference. First operand 224 states and 340 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:16,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:16,813 INFO L93 Difference]: Finished difference Result 856 states and 1300 transitions. [2021-08-06 20:06:16,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-08-06 20:06:16,814 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 20:06:16,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:16,818 INFO L225 Difference]: With dead ends: 856 [2021-08-06 20:06:16,819 INFO L226 Difference]: Without dead ends: 666 [2021-08-06 20:06:16,821 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1703 ImplicationChecksByTransitivity, 2055.9ms TimeCoverageRelationStatistics Valid=1039, Invalid=4511, Unknown=0, NotChecked=0, Total=5550 [2021-08-06 20:06:16,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-08-06 20:06:16,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 238. [2021-08-06 20:06:16,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 1.5358649789029535) internal successors, (364), 237 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:16,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 364 transitions. [2021-08-06 20:06:16,830 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 364 transitions. Word has length 31 [2021-08-06 20:06:16,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:06:16,830 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 364 transitions. [2021-08-06 20:06:16,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:16,830 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 364 transitions. [2021-08-06 20:06:16,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:06:16,831 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:16,831 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:06:16,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-06 20:06:17,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:17,046 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:06:17,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:17,047 INFO L82 PathProgramCache]: Analyzing trace with hash -590885087, now seen corresponding path program 6 times [2021-08-06 20:06:17,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:17,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682346408] [2021-08-06 20:06:17,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:17,047 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:17,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:17,194 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 73.7 percent of original size [2021-08-06 20:06:17,200 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 73.7 percent of original size [2021-08-06 20:06:17,234 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 70.3 percent of original size [2021-08-06 20:06:17,238 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 70.3 percent of original size [2021-08-06 20:06:17,268 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 68.6 percent of original size [2021-08-06 20:06:17,271 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 68.6 percent of original size [2021-08-06 20:06:17,286 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 68.6 percent of original size [2021-08-06 20:06:17,296 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 68.6 percent of original size [2021-08-06 20:06:17,325 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 20:06:17,326 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 20:06:17,362 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:06:17,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:17,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682346408] [2021-08-06 20:06:17,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682346408] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:17,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081993654] [2021-08-06 20:06:17,363 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:06:17,363 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:17,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:06:17,364 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:06:17,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-06 20:06:17,605 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:06:17,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:06:17,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 20:06:17,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:06:18,209 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:06:18,209 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 25 treesize of output 13 [2021-08-06 20:06:18,329 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:18,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081993654] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:18,329 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:06:18,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-08-06 20:06:18,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185859955] [2021-08-06 20:06:18,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:06:18,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:06:18,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:06:18,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:06:18,331 INFO L87 Difference]: Start difference. First operand 238 states and 364 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:19,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:19,486 INFO L93 Difference]: Finished difference Result 718 states and 1084 transitions. [2021-08-06 20:06:19,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-06 20:06:19,486 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 20:06:19,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:19,489 INFO L225 Difference]: With dead ends: 718 [2021-08-06 20:06:19,489 INFO L226 Difference]: Without dead ends: 559 [2021-08-06 20:06:19,490 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 989.7ms TimeCoverageRelationStatistics Valid=604, Invalid=2702, Unknown=0, NotChecked=0, Total=3306 [2021-08-06 20:06:19,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-08-06 20:06:19,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 262. [2021-08-06 20:06:19,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 1.5172413793103448) internal successors, (396), 261 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:19,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 396 transitions. [2021-08-06 20:06:19,503 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 396 transitions. Word has length 31 [2021-08-06 20:06:19,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:06:19,504 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 396 transitions. [2021-08-06 20:06:19,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:19,504 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 396 transitions. [2021-08-06 20:06:19,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-06 20:06:19,506 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:19,506 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:06:19,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-06 20:06:19,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:19,719 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:06:19,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:19,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1143149526, now seen corresponding path program 7 times [2021-08-06 20:06:19,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:19,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328188715] [2021-08-06 20:06:19,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:19,720 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:19,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:19,805 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:19,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:19,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328188715] [2021-08-06 20:06:19,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328188715] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:19,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481133176] [2021-08-06 20:06:19,806 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:06:19,806 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:19,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:06:19,821 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:06:19,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-06 20:06:20,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:20,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 20:06:20,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:06:20,318 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:06:20,319 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:06:20,371 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:20,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481133176] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:20,371 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:06:20,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-06 20:06:20,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090865556] [2021-08-06 20:06:20,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 20:06:20,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:06:20,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 20:06:20,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-06 20:06:20,385 INFO L87 Difference]: Start difference. First operand 262 states and 396 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:20,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:20,402 INFO L93 Difference]: Finished difference Result 543 states and 801 transitions. [2021-08-06 20:06:20,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 20:06:20,404 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-06 20:06:20,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:20,406 INFO L225 Difference]: With dead ends: 543 [2021-08-06 20:06:20,406 INFO L226 Difference]: Without dead ends: 511 [2021-08-06 20:06:20,406 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 26.7ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-06 20:06:20,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-08-06 20:06:20,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 351. [2021-08-06 20:06:20,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 1.5342857142857143) internal successors, (537), 350 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:20,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 537 transitions. [2021-08-06 20:06:20,429 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 537 transitions. Word has length 34 [2021-08-06 20:06:20,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:06:20,429 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 537 transitions. [2021-08-06 20:06:20,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:20,430 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 537 transitions. [2021-08-06 20:06:20,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 20:06:20,431 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:20,431 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:06:20,483 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-08-06 20:06:20,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:20,631 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:06:20,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:20,632 INFO L82 PathProgramCache]: Analyzing trace with hash -637251198, now seen corresponding path program 8 times [2021-08-06 20:06:20,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:20,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311138287] [2021-08-06 20:06:20,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:20,632 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:20,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:21,043 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:21,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:21,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311138287] [2021-08-06 20:06:21,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311138287] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:21,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863065751] [2021-08-06 20:06:21,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:06:21,044 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:21,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:06:21,045 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:06:21,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-06 20:06:21,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:06:21,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:06:21,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 20:06:21,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:06:22,349 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-06 20:06:22,349 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 38 treesize of output 18 [2021-08-06 20:06:22,726 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:22,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863065751] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:22,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:06:22,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2021-08-06 20:06:22,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142599001] [2021-08-06 20:06:22,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 20:06:22,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:06:22,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 20:06:22,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:06:22,729 INFO L87 Difference]: Start difference. First operand 351 states and 537 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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) [2021-08-06 20:06:25,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:25,892 INFO L93 Difference]: Finished difference Result 1570 states and 2373 transitions. [2021-08-06 20:06:25,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-08-06 20:06:25,893 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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 37 [2021-08-06 20:06:25,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:25,898 INFO L225 Difference]: With dead ends: 1570 [2021-08-06 20:06:25,898 INFO L226 Difference]: Without dead ends: 1377 [2021-08-06 20:06:25,900 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2400 ImplicationChecksByTransitivity, 2673.8ms TimeCoverageRelationStatistics Valid=1260, Invalid=7296, Unknown=0, NotChecked=0, Total=8556 [2021-08-06 20:06:25,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1377 states. [2021-08-06 20:06:25,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1377 to 417. [2021-08-06 20:06:25,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 1.5528846153846154) internal successors, (646), 416 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:25,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 646 transitions. [2021-08-06 20:06:25,914 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 646 transitions. Word has length 37 [2021-08-06 20:06:25,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:06:25,914 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 646 transitions. [2021-08-06 20:06:25,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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) [2021-08-06 20:06:25,915 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 646 transitions. [2021-08-06 20:06:25,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 20:06:25,916 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:25,916 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:06:25,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-06 20:06:26,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-06 20:06:26,129 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:06:26,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:26,129 INFO L82 PathProgramCache]: Analyzing trace with hash 666138882, now seen corresponding path program 9 times [2021-08-06 20:06:26,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:26,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294420662] [2021-08-06 20:06:26,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:26,130 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:26,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:26,479 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 73.7 percent of original size [2021-08-06 20:06:26,483 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 73.7 percent of original size [2021-08-06 20:06:26,601 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 68.6 percent of original size [2021-08-06 20:06:26,604 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 68.6 percent of original size [2021-08-06 20:06:26,687 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:26,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:26,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294420662] [2021-08-06 20:06:26,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294420662] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:26,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700322029] [2021-08-06 20:06:26,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:06:26,688 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:26,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:06:26,688 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:06:26,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-06 20:06:26,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:06:26,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:06:26,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 20:06:26,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:06:27,810 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-06 20:06:27,810 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 38 treesize of output 18 [2021-08-06 20:06:27,929 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:27,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700322029] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:27,929 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:06:27,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2021-08-06 20:06:27,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583736273] [2021-08-06 20:06:27,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 20:06:27,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:06:27,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 20:06:27,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=871, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:06:27,931 INFO L87 Difference]: Start difference. First operand 417 states and 646 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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) [2021-08-06 20:06:30,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:30,430 INFO L93 Difference]: Finished difference Result 1339 states and 1991 transitions. [2021-08-06 20:06:30,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-06 20:06:30,430 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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 37 [2021-08-06 20:06:30,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:30,435 INFO L225 Difference]: With dead ends: 1339 [2021-08-06 20:06:30,435 INFO L226 Difference]: Without dead ends: 1272 [2021-08-06 20:06:30,437 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1686 ImplicationChecksByTransitivity, 2225.8ms TimeCoverageRelationStatistics Valid=909, Invalid=5253, Unknown=0, NotChecked=0, Total=6162 [2021-08-06 20:06:30,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2021-08-06 20:06:30,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 429. [2021-08-06 20:06:30,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 1.5420560747663552) internal successors, (660), 428 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:30,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 660 transitions. [2021-08-06 20:06:30,451 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 660 transitions. Word has length 37 [2021-08-06 20:06:30,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:06:30,452 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 660 transitions. [2021-08-06 20:06:30,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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) [2021-08-06 20:06:30,452 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 660 transitions. [2021-08-06 20:06:30,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 20:06:30,453 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:30,453 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:06:30,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-06 20:06:30,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:30,677 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:06:30,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:30,677 INFO L82 PathProgramCache]: Analyzing trace with hash -63398806, now seen corresponding path program 10 times [2021-08-06 20:06:30,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:30,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297264841] [2021-08-06 20:06:30,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:30,678 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:30,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:31,242 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:06:31,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:31,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297264841] [2021-08-06 20:06:31,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297264841] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:31,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213024438] [2021-08-06 20:06:31,243 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:06:31,243 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:31,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:06:31,250 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:06:31,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-06 20:06:31,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:06:31,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:06:31,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 20:06:31,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:06:32,747 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-06 20:06:32,747 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 38 treesize of output 18 [2021-08-06 20:06:32,880 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:32,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213024438] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:32,890 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:06:32,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 31 [2021-08-06 20:06:32,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988589314] [2021-08-06 20:06:32,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 20:06:32,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:06:32,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 20:06:32,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:06:32,894 INFO L87 Difference]: Start difference. First operand 429 states and 660 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 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) [2021-08-06 20:06:38,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:38,416 INFO L93 Difference]: Finished difference Result 2301 states and 3466 transitions. [2021-08-06 20:06:38,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-08-06 20:06:38,417 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 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 37 [2021-08-06 20:06:38,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:38,423 INFO L225 Difference]: With dead ends: 2301 [2021-08-06 20:06:38,424 INFO L226 Difference]: Without dead ends: 1902 [2021-08-06 20:06:38,441 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5136 ImplicationChecksByTransitivity, 4508.2ms TimeCoverageRelationStatistics Valid=2420, Invalid=12586, Unknown=0, NotChecked=0, Total=15006 [2021-08-06 20:06:38,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1902 states. [2021-08-06 20:06:38,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1902 to 439. [2021-08-06 20:06:38,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 1.552511415525114) internal successors, (680), 438 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:38,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 680 transitions. [2021-08-06 20:06:38,457 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 680 transitions. Word has length 37 [2021-08-06 20:06:38,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:06:38,457 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 680 transitions. [2021-08-06 20:06:38,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 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) [2021-08-06 20:06:38,458 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 680 transitions. [2021-08-06 20:06:38,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 20:06:38,459 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:38,459 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:06:38,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-06 20:06:38,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-06 20:06:38,683 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:06:38,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:38,684 INFO L82 PathProgramCache]: Analyzing trace with hash 445263666, now seen corresponding path program 11 times [2021-08-06 20:06:38,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:38,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233823302] [2021-08-06 20:06:38,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:38,684 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:38,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:38,929 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 73.7 percent of original size [2021-08-06 20:06:38,932 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 73.7 percent of original size [2021-08-06 20:06:38,954 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 68.6 percent of original size [2021-08-06 20:06:38,956 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 68.6 percent of original size [2021-08-06 20:06:39,041 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:06:39,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:39,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233823302] [2021-08-06 20:06:39,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233823302] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:39,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358670624] [2021-08-06 20:06:39,042 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:06:39,042 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:39,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:06:39,043 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:06:39,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-06 20:06:39,462 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:06:39,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:06:39,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 20:06:39,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:06:40,394 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-06 20:06:40,395 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 38 treesize of output 18 [2021-08-06 20:06:40,535 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:40,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358670624] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:40,536 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:06:40,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 31 [2021-08-06 20:06:40,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512165256] [2021-08-06 20:06:40,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 20:06:40,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:06:40,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 20:06:40,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:06:40,540 INFO L87 Difference]: Start difference. First operand 439 states and 680 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 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) [2021-08-06 20:06:43,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:43,415 INFO L93 Difference]: Finished difference Result 1599 states and 2358 transitions. [2021-08-06 20:06:43,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-08-06 20:06:43,415 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 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 37 [2021-08-06 20:06:43,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:43,431 INFO L225 Difference]: With dead ends: 1599 [2021-08-06 20:06:43,432 INFO L226 Difference]: Without dead ends: 1532 [2021-08-06 20:06:43,434 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3248 ImplicationChecksByTransitivity, 2674.8ms TimeCoverageRelationStatistics Valid=1441, Invalid=8459, Unknown=0, NotChecked=0, Total=9900 [2021-08-06 20:06:43,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1532 states. [2021-08-06 20:06:43,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1532 to 473. [2021-08-06 20:06:43,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 1.5635593220338984) internal successors, (738), 472 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:43,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 738 transitions. [2021-08-06 20:06:43,454 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 738 transitions. Word has length 37 [2021-08-06 20:06:43,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:06:43,454 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 738 transitions. [2021-08-06 20:06:43,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 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) [2021-08-06 20:06:43,455 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 738 transitions. [2021-08-06 20:06:43,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 20:06:43,465 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:43,465 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:06:43,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-06 20:06:43,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-06 20:06:43,666 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:06:43,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:43,667 INFO L82 PathProgramCache]: Analyzing trace with hash -281863996, now seen corresponding path program 12 times [2021-08-06 20:06:43,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:43,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018840081] [2021-08-06 20:06:43,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:43,667 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:43,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:43,924 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 74.4 percent of original size [2021-08-06 20:06:43,927 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 74.4 percent of original size [2021-08-06 20:06:43,962 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 68.6 percent of original size [2021-08-06 20:06:43,965 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 68.6 percent of original size [2021-08-06 20:06:43,974 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 68.6 percent of original size [2021-08-06 20:06:43,976 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 68.6 percent of original size [2021-08-06 20:06:44,052 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:06:44,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:44,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018840081] [2021-08-06 20:06:44,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018840081] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:44,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539388097] [2021-08-06 20:06:44,052 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:06:44,052 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:44,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:06:44,053 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:06:44,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-06 20:06:44,530 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 20:06:44,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:06:44,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 20:06:44,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:06:45,402 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-06 20:06:45,403 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 38 treesize of output 18 [2021-08-06 20:06:45,583 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:45,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539388097] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:45,584 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:06:45,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 30 [2021-08-06 20:06:45,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167160889] [2021-08-06 20:06:45,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 20:06:45,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:06:45,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 20:06:45,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:06:45,601 INFO L87 Difference]: Start difference. First operand 473 states and 738 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 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) [2021-08-06 20:06:49,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:49,447 INFO L93 Difference]: Finished difference Result 2058 states and 3065 transitions. [2021-08-06 20:06:49,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-08-06 20:06:49,448 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 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 37 [2021-08-06 20:06:49,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:49,453 INFO L225 Difference]: With dead ends: 2058 [2021-08-06 20:06:49,453 INFO L226 Difference]: Without dead ends: 1813 [2021-08-06 20:06:49,457 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4909 ImplicationChecksByTransitivity, 3196.8ms TimeCoverageRelationStatistics Valid=1917, Invalid=11655, Unknown=0, NotChecked=0, Total=13572 [2021-08-06 20:06:49,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1813 states. [2021-08-06 20:06:49,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1813 to 505. [2021-08-06 20:06:49,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 1.5773809523809523) internal successors, (795), 504 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:49,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 795 transitions. [2021-08-06 20:06:49,501 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 795 transitions. Word has length 37 [2021-08-06 20:06:49,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:06:49,503 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 795 transitions. [2021-08-06 20:06:49,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 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) [2021-08-06 20:06:49,503 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 795 transitions. [2021-08-06 20:06:49,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 20:06:49,505 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:49,505 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:06:49,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-06 20:06:49,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-06 20:06:49,729 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:06:49,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:49,729 INFO L82 PathProgramCache]: Analyzing trace with hash -555748350, now seen corresponding path program 13 times [2021-08-06 20:06:49,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:49,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606488064] [2021-08-06 20:06:49,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:49,730 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:49,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:49,929 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 73.7 percent of original size [2021-08-06 20:06:49,932 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 73.7 percent of original size [2021-08-06 20:06:49,954 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 70.3 percent of original size [2021-08-06 20:06:49,957 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 70.3 percent of original size [2021-08-06 20:06:49,974 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 68.6 percent of original size [2021-08-06 20:06:49,977 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 68.6 percent of original size [2021-08-06 20:06:49,986 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 68.6 percent of original size [2021-08-06 20:06:49,988 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 68.6 percent of original size [2021-08-06 20:06:50,078 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:06:50,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:50,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606488064] [2021-08-06 20:06:50,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606488064] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:50,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851880117] [2021-08-06 20:06:50,078 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:06:50,078 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:50,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:06:50,079 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:06:50,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-06 20:06:50,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:50,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 20:06:50,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:06:51,472 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-06 20:06:51,473 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 38 treesize of output 18 [2021-08-06 20:06:51,578 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:51,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851880117] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:51,579 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:06:51,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 30 [2021-08-06 20:06:51,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120388902] [2021-08-06 20:06:51,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 20:06:51,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:06:51,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 20:06:51,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:06:51,580 INFO L87 Difference]: Start difference. First operand 505 states and 795 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 30 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) [2021-08-06 20:06:54,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:54,565 INFO L93 Difference]: Finished difference Result 1984 states and 3041 transitions. [2021-08-06 20:06:54,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-08-06 20:06:54,565 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 30 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 37 [2021-08-06 20:06:54,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:54,571 INFO L225 Difference]: With dead ends: 1984 [2021-08-06 20:06:54,571 INFO L226 Difference]: Without dead ends: 1710 [2021-08-06 20:06:54,572 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3023 ImplicationChecksByTransitivity, 2431.1ms TimeCoverageRelationStatistics Valid=1275, Invalid=7845, Unknown=0, NotChecked=0, Total=9120 [2021-08-06 20:06:54,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1710 states. [2021-08-06 20:06:54,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1710 to 539. [2021-08-06 20:06:54,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 538 states have (on average 1.587360594795539) internal successors, (854), 538 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:54,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 854 transitions. [2021-08-06 20:06:54,636 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 854 transitions. Word has length 37 [2021-08-06 20:06:54,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:06:54,637 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 854 transitions. [2021-08-06 20:06:54,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 30 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) [2021-08-06 20:06:54,637 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 854 transitions. [2021-08-06 20:06:54,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 20:06:54,638 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:54,638 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:06:54,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-06 20:06:54,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-06 20:06:54,865 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:06:54,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:54,865 INFO L82 PathProgramCache]: Analyzing trace with hash 818107516, now seen corresponding path program 14 times [2021-08-06 20:06:54,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:54,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032916289] [2021-08-06 20:06:54,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:54,866 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:54,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:54,989 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 40.0 percent of original size [2021-08-06 20:06:55,003 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 40.0 percent of original size [2021-08-06 20:06:55,023 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 33.3 percent of original size [2021-08-06 20:06:55,024 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 33.3 percent of original size [2021-08-06 20:06:55,182 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 20:06:55,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:55,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032916289] [2021-08-06 20:06:55,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032916289] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:55,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579542260] [2021-08-06 20:06:55,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:06:55,182 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:55,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:06:55,193 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:06:55,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-06 20:06:55,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:06:55,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:06:55,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 20:06:55,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:06:56,778 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-06 20:06:56,779 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 38 treesize of output 18 [2021-08-06 20:06:56,953 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:56,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579542260] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:56,953 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:06:56,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 29 [2021-08-06 20:06:56,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524491594] [2021-08-06 20:06:56,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 20:06:56,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:06:56,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 20:06:56,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-08-06 20:06:56,956 INFO L87 Difference]: Start difference. First operand 539 states and 854 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 29 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) [2021-08-06 20:06:59,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:59,590 INFO L93 Difference]: Finished difference Result 2134 states and 3152 transitions. [2021-08-06 20:06:59,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-08-06 20:06:59,591 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 29 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 37 [2021-08-06 20:06:59,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:59,597 INFO L225 Difference]: With dead ends: 2134 [2021-08-06 20:06:59,597 INFO L226 Difference]: Without dead ends: 2008 [2021-08-06 20:06:59,598 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2391 ImplicationChecksByTransitivity, 2330.2ms TimeCoverageRelationStatistics Valid=1181, Invalid=6829, Unknown=0, NotChecked=0, Total=8010 [2021-08-06 20:06:59,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2008 states. [2021-08-06 20:06:59,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2008 to 613. [2021-08-06 20:06:59,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 612 states have (on average 1.5751633986928104) internal successors, (964), 612 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:59,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 964 transitions. [2021-08-06 20:06:59,627 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 964 transitions. Word has length 37 [2021-08-06 20:06:59,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:06:59,628 INFO L470 AbstractCegarLoop]: Abstraction has 613 states and 964 transitions. [2021-08-06 20:06:59,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 29 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) [2021-08-06 20:06:59,628 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 964 transitions. [2021-08-06 20:06:59,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 20:06:59,636 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:59,636 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:06:59,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-06 20:06:59,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:59,849 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:06:59,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:59,849 INFO L82 PathProgramCache]: Analyzing trace with hash -579570600, now seen corresponding path program 15 times [2021-08-06 20:06:59,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:59,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458942018] [2021-08-06 20:06:59,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:59,850 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:59,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:07:00,010 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 40.0 percent of original size [2021-08-06 20:07:00,014 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 40.0 percent of original size [2021-08-06 20:07:00,034 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 33.3 percent of original size [2021-08-06 20:07:00,035 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 33.3 percent of original size [2021-08-06 20:07:00,055 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 73.7 percent of original size [2021-08-06 20:07:00,058 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 73.7 percent of original size [2021-08-06 20:07:00,079 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 70.3 percent of original size [2021-08-06 20:07:00,081 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 70.3 percent of original size [2021-08-06 20:07:00,096 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 68.6 percent of original size [2021-08-06 20:07:00,098 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 68.6 percent of original size [2021-08-06 20:07:00,149 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 68.6 percent of original size [2021-08-06 20:07:00,162 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 68.6 percent of original size [2021-08-06 20:07:00,236 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:07:00,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:07:00,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458942018] [2021-08-06 20:07:00,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458942018] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:07:00,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62096873] [2021-08-06 20:07:00,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:07:00,237 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:07:00,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:07:00,241 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:07:00,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-06 20:07:00,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 20:07:00,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:07:00,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 20:07:00,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:07:01,751 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-06 20:07:01,752 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 38 treesize of output 18 [2021-08-06 20:07:01,870 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:07:01,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62096873] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:07:01,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:07:01,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 29 [2021-08-06 20:07:01,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465597346] [2021-08-06 20:07:01,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 20:07:01,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:07:01,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 20:07:01,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2021-08-06 20:07:01,872 INFO L87 Difference]: Start difference. First operand 613 states and 964 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:04,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:07:04,662 INFO L93 Difference]: Finished difference Result 2045 states and 3136 transitions. [2021-08-06 20:07:04,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-08-06 20:07:04,663 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 20:07:04,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:07:04,668 INFO L225 Difference]: With dead ends: 2045 [2021-08-06 20:07:04,669 INFO L226 Difference]: Without dead ends: 1795 [2021-08-06 20:07:04,670 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3918 ImplicationChecksByTransitivity, 2464.6ms TimeCoverageRelationStatistics Valid=1638, Invalid=9492, Unknown=0, NotChecked=0, Total=11130 [2021-08-06 20:07:04,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1795 states. [2021-08-06 20:07:04,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1795 to 671. [2021-08-06 20:07:04,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 670 states have (on average 1.5641791044776119) internal successors, (1048), 670 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:04,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 1048 transitions. [2021-08-06 20:07:04,687 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 1048 transitions. Word has length 37 [2021-08-06 20:07:04,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:07:04,688 INFO L470 AbstractCegarLoop]: Abstraction has 671 states and 1048 transitions. [2021-08-06 20:07:04,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:04,688 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 1048 transitions. [2021-08-06 20:07:04,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 20:07:04,689 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:07:04,690 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:07:04,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-06 20:07:04,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-06 20:07:04,901 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:07:04,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:07:04,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1368535236, now seen corresponding path program 16 times [2021-08-06 20:07:04,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:07:04,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643505300] [2021-08-06 20:07:04,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:07:04,902 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:07:04,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:07:05,067 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 38.5 percent of original size [2021-08-06 20:07:05,068 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 38.5 percent of original size [2021-08-06 20:07:05,114 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 36.8 percent of original size [2021-08-06 20:07:05,116 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 36.8 percent of original size [2021-08-06 20:07:05,133 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 33.3 percent of original size [2021-08-06 20:07:05,135 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 33.3 percent of original size [2021-08-06 20:07:05,315 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:07:05,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:07:05,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643505300] [2021-08-06 20:07:05,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643505300] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:07:05,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157286436] [2021-08-06 20:07:05,315 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:07:05,315 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:07:05,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:07:05,316 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:07:05,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-06 20:07:06,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:07:06,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:07:06,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 20:07:06,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:07:06,902 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-06 20:07:06,902 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 38 treesize of output 18 [2021-08-06 20:07:07,043 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:07:07,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157286436] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:07:07,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:07:07,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 30 [2021-08-06 20:07:07,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727613861] [2021-08-06 20:07:07,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 20:07:07,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:07:07,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 20:07:07,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:07:07,044 INFO L87 Difference]: Start difference. First operand 671 states and 1048 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 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) [2021-08-06 20:07:08,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:07:08,884 INFO L93 Difference]: Finished difference Result 2138 states and 3202 transitions. [2021-08-06 20:07:08,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-06 20:07:08,885 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 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 37 [2021-08-06 20:07:08,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:07:08,891 INFO L225 Difference]: With dead ends: 2138 [2021-08-06 20:07:08,891 INFO L226 Difference]: Without dead ends: 2043 [2021-08-06 20:07:08,892 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1718 ImplicationChecksByTransitivity, 1928.0ms TimeCoverageRelationStatistics Valid=845, Invalid=5161, Unknown=0, NotChecked=0, Total=6006 [2021-08-06 20:07:08,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2043 states. [2021-08-06 20:07:08,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2043 to 711. [2021-08-06 20:07:08,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 710 states have (on average 1.5577464788732394) internal successors, (1106), 710 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:08,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 1106 transitions. [2021-08-06 20:07:08,910 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 1106 transitions. Word has length 37 [2021-08-06 20:07:08,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:07:08,910 INFO L470 AbstractCegarLoop]: Abstraction has 711 states and 1106 transitions. [2021-08-06 20:07:08,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 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) [2021-08-06 20:07:08,910 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 1106 transitions. [2021-08-06 20:07:08,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-06 20:07:08,912 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:07:08,912 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:07:08,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-06 20:07:09,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:07:09,125 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:07:09,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:07:09,125 INFO L82 PathProgramCache]: Analyzing trace with hash 2022687949, now seen corresponding path program 17 times [2021-08-06 20:07:09,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:07:09,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380711609] [2021-08-06 20:07:09,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:07:09,126 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:07:09,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:07:09,199 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:07:09,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:07:09,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380711609] [2021-08-06 20:07:09,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380711609] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:07:09,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284239837] [2021-08-06 20:07:09,200 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:07:09,200 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:07:09,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:07:09,217 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:07:09,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-06 20:07:10,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 20:07:10,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:07:10,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:07:10,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:07:10,197 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:07:10,198 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:07:10,255 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:07:10,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284239837] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:07:10,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:07:10,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-06 20:07:10,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989666748] [2021-08-06 20:07:10,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 20:07:10,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:07:10,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 20:07:10,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-06 20:07:10,261 INFO L87 Difference]: Start difference. First operand 711 states and 1106 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:10,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:07:10,278 INFO L93 Difference]: Finished difference Result 1137 states and 1723 transitions. [2021-08-06 20:07:10,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 20:07:10,279 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-08-06 20:07:10,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:07:10,282 INFO L225 Difference]: With dead ends: 1137 [2021-08-06 20:07:10,282 INFO L226 Difference]: Without dead ends: 1099 [2021-08-06 20:07:10,282 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 16.4ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-06 20:07:10,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2021-08-06 20:07:10,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 830. [2021-08-06 20:07:10,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 1.5536791314837153) internal successors, (1288), 829 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:10,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 1288 transitions. [2021-08-06 20:07:10,320 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 1288 transitions. Word has length 40 [2021-08-06 20:07:10,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:07:10,320 INFO L470 AbstractCegarLoop]: Abstraction has 830 states and 1288 transitions. [2021-08-06 20:07:10,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:10,320 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 1288 transitions. [2021-08-06 20:07:10,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:07:10,322 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:07:10,322 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:07:10,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-06 20:07:10,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:07:10,522 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:07:10,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:07:10,523 INFO L82 PathProgramCache]: Analyzing trace with hash 570148901, now seen corresponding path program 18 times [2021-08-06 20:07:10,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:07:10,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768034223] [2021-08-06 20:07:10,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:07:10,523 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:07:10,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:07:11,101 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:07:11,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:07:11,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768034223] [2021-08-06 20:07:11,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768034223] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:07:11,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291950604] [2021-08-06 20:07:11,102 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:07:11,102 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:07:11,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:07:11,103 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:07:11,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-06 20:07:11,886 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 20:07:11,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:07:11,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 20:07:11,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:07:21,638 INFO L354 Elim1Store]: treesize reduction 195, result has 4.9 percent of original size [2021-08-06 20:07:21,638 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 64 treesize of output 49 [2021-08-06 20:07:21,810 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:07:21,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291950604] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:07:21,811 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:07:21,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-08-06 20:07:21,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284664111] [2021-08-06 20:07:21,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-06 20:07:21,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:07:21,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-06 20:07:21,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1398, Unknown=3, NotChecked=0, Total=1560 [2021-08-06 20:07:21,813 INFO L87 Difference]: Start difference. First operand 830 states and 1288 transitions. Second operand has 40 states, 40 states have (on average 1.9) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:08:44,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:08:44,647 INFO L93 Difference]: Finished difference Result 4960 states and 7575 transitions. [2021-08-06 20:08:44,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-08-06 20:08:44,648 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.9) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-06 20:08:44,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:08:44,659 INFO L225 Difference]: With dead ends: 4960 [2021-08-06 20:08:44,660 INFO L226 Difference]: Without dead ends: 4340 [2021-08-06 20:08:44,664 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11665 ImplicationChecksByTransitivity, 35348.1ms TimeCoverageRelationStatistics Valid=4525, Invalid=27327, Unknown=10, NotChecked=0, Total=31862 [2021-08-06 20:08:44,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4340 states. [2021-08-06 20:08:44,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4340 to 976. [2021-08-06 20:08:44,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 976 states, 975 states have (on average 1.5753846153846154) internal successors, (1536), 975 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:08:44,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 1536 transitions. [2021-08-06 20:08:44,697 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 1536 transitions. Word has length 43 [2021-08-06 20:08:44,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:08:44,697 INFO L470 AbstractCegarLoop]: Abstraction has 976 states and 1536 transitions. [2021-08-06 20:08:44,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.9) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:08:44,697 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 1536 transitions. [2021-08-06 20:08:44,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:08:44,699 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:08:44,699 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:08:44,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-06 20:08:44,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:08:44,925 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:08:44,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:08:44,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1238752825, now seen corresponding path program 19 times [2021-08-06 20:08:44,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:08:44,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191536604] [2021-08-06 20:08:44,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:08:44,926 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:08:44,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:08:45,392 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 55.0 percent of original size [2021-08-06 20:08:45,395 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 55.0 percent of original size [2021-08-06 20:08:45,430 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:08:45,432 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:08:45,574 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:08:45,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:08:45,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191536604] [2021-08-06 20:08:45,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191536604] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:08:45,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870400178] [2021-08-06 20:08:45,575 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:08:45,575 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:08:45,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:08:45,576 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:08:45,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-06 20:08:46,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:08:46,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 20:08:46,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:08:48,010 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-06 20:08:48,020 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 [2021-08-06 20:08:48,213 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:08:48,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870400178] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:08:48,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:08:48,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-08-06 20:08:48,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628618138] [2021-08-06 20:08:48,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-06 20:08:48,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:08:48,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-06 20:08:48,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1402, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 20:08:48,214 INFO L87 Difference]: Start difference. First operand 976 states and 1536 transitions. Second operand has 40 states, 40 states have (on average 1.9) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:08:51,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:08:51,783 INFO L93 Difference]: Finished difference Result 3024 states and 4546 transitions. [2021-08-06 20:08:51,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-08-06 20:08:51,783 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.9) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-06 20:08:51,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:08:51,799 INFO L225 Difference]: With dead ends: 3024 [2021-08-06 20:08:51,799 INFO L226 Difference]: Without dead ends: 2957 [2021-08-06 20:08:51,805 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2907 ImplicationChecksByTransitivity, 3513.7ms TimeCoverageRelationStatistics Valid=1279, Invalid=9023, Unknown=0, NotChecked=0, Total=10302 [2021-08-06 20:08:51,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2957 states. [2021-08-06 20:08:51,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2957 to 1010. [2021-08-06 20:08:51,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1010 states, 1009 states have (on average 1.5738354806739345) internal successors, (1588), 1009 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:08:51,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 1588 transitions. [2021-08-06 20:08:51,861 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 1588 transitions. Word has length 43 [2021-08-06 20:08:51,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:08:51,861 INFO L470 AbstractCegarLoop]: Abstraction has 1010 states and 1588 transitions. [2021-08-06 20:08:51,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.9) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:08:51,861 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 1588 transitions. [2021-08-06 20:08:51,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:08:51,864 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:08:51,864 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:08:51,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-06 20:08:52,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:08:52,089 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:08:52,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:08:52,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1138963339, now seen corresponding path program 20 times [2021-08-06 20:08:52,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:08:52,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079168218] [2021-08-06 20:08:52,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:08:52,090 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:08:52,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:08:52,619 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:08:52,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:08:52,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079168218] [2021-08-06 20:08:52,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079168218] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:08:52,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695304393] [2021-08-06 20:08:52,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:08:52,619 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:08:52,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:08:52,620 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:08:52,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-06 20:08:53,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:08:53,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:08:53,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 20:08:53,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:08:55,000 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-06 20:08:55,001 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 [2021-08-06 20:08:55,145 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:08:55,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695304393] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:08:55,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:08:55,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-08-06 20:08:55,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628870085] [2021-08-06 20:08:55,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-06 20:08:55,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:08:55,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-06 20:08:55,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1326, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 20:08:55,170 INFO L87 Difference]: Start difference. First operand 1010 states and 1588 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:09:00,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:09:00,851 INFO L93 Difference]: Finished difference Result 5193 states and 7926 transitions. [2021-08-06 20:09:00,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-08-06 20:09:00,851 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-06 20:09:00,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:09:00,873 INFO L225 Difference]: With dead ends: 5193 [2021-08-06 20:09:00,873 INFO L226 Difference]: Without dead ends: 4798 [2021-08-06 20:09:00,891 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6432 ImplicationChecksByTransitivity, 4764.7ms TimeCoverageRelationStatistics Valid=2626, Invalid=16556, Unknown=0, NotChecked=0, Total=19182 [2021-08-06 20:09:00,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4798 states. [2021-08-06 20:09:00,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4798 to 1162. [2021-08-06 20:09:00,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1162 states, 1161 states have (on average 1.5968992248062015) internal successors, (1854), 1161 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:09:00,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 1854 transitions. [2021-08-06 20:09:00,963 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 1854 transitions. Word has length 43 [2021-08-06 20:09:00,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:09:00,964 INFO L470 AbstractCegarLoop]: Abstraction has 1162 states and 1854 transitions. [2021-08-06 20:09:00,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:09:00,964 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 1854 transitions. [2021-08-06 20:09:00,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:09:00,966 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:09:00,966 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:09:01,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-06 20:09:01,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-06 20:09:01,189 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:09:01,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:09:01,189 INFO L82 PathProgramCache]: Analyzing trace with hash -630300867, now seen corresponding path program 21 times [2021-08-06 20:09:01,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:09:01,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401593466] [2021-08-06 20:09:01,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:09:01,190 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:09:01,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:09:01,620 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 55.0 percent of original size [2021-08-06 20:09:01,623 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 55.0 percent of original size [2021-08-06 20:09:01,687 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:09:01,689 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:09:01,804 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:09:01,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:09:01,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401593466] [2021-08-06 20:09:01,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401593466] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:09:01,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966252562] [2021-08-06 20:09:01,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:09:01,811 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:09:01,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:09:01,811 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:09:01,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-06 20:09:02,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 20:09:02,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:09:02,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 20:09:02,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:09:04,193 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-06 20:09:04,193 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 [2021-08-06 20:09:04,336 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:09:04,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966252562] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:09:04,337 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:09:04,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-08-06 20:09:04,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210201709] [2021-08-06 20:09:04,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-06 20:09:04,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:09:04,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-06 20:09:04,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1327, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 20:09:04,338 INFO L87 Difference]: Start difference. First operand 1162 states and 1854 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:09:09,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:09:09,058 INFO L93 Difference]: Finished difference Result 3492 states and 5245 transitions. [2021-08-06 20:09:09,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-08-06 20:09:09,059 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-06 20:09:09,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:09:09,087 INFO L225 Difference]: With dead ends: 3492 [2021-08-06 20:09:09,087 INFO L226 Difference]: Without dead ends: 3425 [2021-08-06 20:09:09,088 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5044 ImplicationChecksByTransitivity, 4457.9ms TimeCoverageRelationStatistics Valid=1888, Invalid=13612, Unknown=0, NotChecked=0, Total=15500 [2021-08-06 20:09:09,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3425 states. [2021-08-06 20:09:09,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3425 to 1234. [2021-08-06 20:09:09,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1234 states, 1233 states have (on average 1.6066504460665045) internal successors, (1981), 1233 states have internal predecessors, (1981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:09:09,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 1981 transitions. [2021-08-06 20:09:09,144 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 1981 transitions. Word has length 43 [2021-08-06 20:09:09,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:09:09,144 INFO L470 AbstractCegarLoop]: Abstraction has 1234 states and 1981 transitions. [2021-08-06 20:09:09,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:09:09,152 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 1981 transitions. [2021-08-06 20:09:09,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:09:09,154 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:09:09,155 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:09:09,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-06 20:09:09,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-06 20:09:09,377 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:09:09,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:09:09,377 INFO L82 PathProgramCache]: Analyzing trace with hash 815899043, now seen corresponding path program 22 times [2021-08-06 20:09:09,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:09:09,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310156540] [2021-08-06 20:09:09,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:09:09,378 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:09:09,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:09:09,882 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:09:09,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:09:09,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310156540] [2021-08-06 20:09:09,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310156540] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:09:09,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396603078] [2021-08-06 20:09:09,882 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:09:09,882 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:09:09,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:09:09,883 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:09:09,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-06 20:09:11,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:09:11,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:09:11,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 20:09:11,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:09:12,407 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-06 20:09:12,407 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 [2021-08-06 20:09:12,599 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:09:12,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396603078] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:09:12,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:09:12,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-08-06 20:09:12,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981104396] [2021-08-06 20:09:12,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-06 20:09:12,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:09:12,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-06 20:09:12,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1258, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 20:09:12,601 INFO L87 Difference]: Start difference. First operand 1234 states and 1981 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:09:22,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:09:22,896 INFO L93 Difference]: Finished difference Result 4838 states and 7394 transitions. [2021-08-06 20:09:22,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2021-08-06 20:09:22,897 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-06 20:09:22,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:09:22,904 INFO L225 Difference]: With dead ends: 4838 [2021-08-06 20:09:22,904 INFO L226 Difference]: Without dead ends: 4314 [2021-08-06 20:09:22,906 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12882 ImplicationChecksByTransitivity, 7903.0ms TimeCoverageRelationStatistics Valid=4353, Invalid=29687, Unknown=0, NotChecked=0, Total=34040 [2021-08-06 20:09:22,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4314 states. [2021-08-06 20:09:22,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4314 to 1270. [2021-08-06 20:09:22,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1270 states, 1269 states have (on average 1.599684791174153) internal successors, (2030), 1269 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:09:22,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 2030 transitions. [2021-08-06 20:09:22,945 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 2030 transitions. Word has length 43 [2021-08-06 20:09:22,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:09:22,945 INFO L470 AbstractCegarLoop]: Abstraction has 1270 states and 2030 transitions. [2021-08-06 20:09:22,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:09:22,946 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 2030 transitions. [2021-08-06 20:09:22,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:09:22,949 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:09:22,950 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:09:22,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-06 20:09:23,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:09:23,157 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:09:23,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:09:23,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1324561515, now seen corresponding path program 23 times [2021-08-06 20:09:23,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:09:23,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066630461] [2021-08-06 20:09:23,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:09:23,158 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:09:23,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:09:23,533 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 55.0 percent of original size [2021-08-06 20:09:23,535 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 55.0 percent of original size [2021-08-06 20:09:23,565 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:09:23,568 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:09:23,668 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:09:23,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:09:23,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066630461] [2021-08-06 20:09:23,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066630461] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:09:23,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744444685] [2021-08-06 20:09:23,669 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:09:23,669 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:09:23,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:09:23,669 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:09:23,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-06 20:09:24,889 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 20:09:24,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:09:24,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 20:09:24,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:09:26,064 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-06 20:09:26,066 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 [2021-08-06 20:09:26,200 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:09:26,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744444685] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:09:26,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:09:26,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-08-06 20:09:26,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291961106] [2021-08-06 20:09:26,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-06 20:09:26,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:09:26,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-06 20:09:26,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1257, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 20:09:26,203 INFO L87 Difference]: Start difference. First operand 1270 states and 2030 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:09:30,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:09:30,732 INFO L93 Difference]: Finished difference Result 3481 states and 5238 transitions. [2021-08-06 20:09:30,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-08-06 20:09:30,733 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-06 20:09:30,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:09:30,739 INFO L225 Difference]: With dead ends: 3481 [2021-08-06 20:09:30,740 INFO L226 Difference]: Without dead ends: 3414 [2021-08-06 20:09:30,742 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6663 ImplicationChecksByTransitivity, 4176.3ms TimeCoverageRelationStatistics Valid=2230, Invalid=16676, Unknown=0, NotChecked=0, Total=18906 [2021-08-06 20:09:30,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3414 states. [2021-08-06 20:09:30,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3414 to 1460. [2021-08-06 20:09:30,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1460 states, 1459 states have (on average 1.614804660726525) internal successors, (2356), 1459 states have internal predecessors, (2356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:09:30,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 2356 transitions. [2021-08-06 20:09:30,774 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 2356 transitions. Word has length 43 [2021-08-06 20:09:30,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:09:30,774 INFO L470 AbstractCegarLoop]: Abstraction has 1460 states and 2356 transitions. [2021-08-06 20:09:30,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:09:30,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 2356 transitions. [2021-08-06 20:09:30,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:09:30,777 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:09:30,777 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:09:30,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-06 20:09:30,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:09:30,996 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:09:30,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:09:30,997 INFO L82 PathProgramCache]: Analyzing trace with hash 597433853, now seen corresponding path program 24 times [2021-08-06 20:09:30,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:09:30,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514550909] [2021-08-06 20:09:30,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:09:30,997 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:09:31,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:09:31,447 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 56.1 percent of original size [2021-08-06 20:09:31,450 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 56.1 percent of original size [2021-08-06 20:09:31,479 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:09:31,482 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:09:31,494 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:09:31,496 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:09:31,613 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:09:31,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:09:31,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514550909] [2021-08-06 20:09:31,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514550909] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:09:31,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070176677] [2021-08-06 20:09:31,613 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:09:31,613 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:09:31,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:09:31,614 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:09:31,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-06 20:09:32,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 20:09:32,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:09:32,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 20:09:32,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:09:34,607 INFO L354 Elim1Store]: treesize reduction 94, result has 3.1 percent of original size [2021-08-06 20:09:34,607 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 61 treesize of output 40 [2021-08-06 20:09:34,736 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:09:34,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070176677] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:09:34,737 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:09:34,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 37 [2021-08-06 20:09:34,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411028261] [2021-08-06 20:09:34,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-06 20:09:34,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:09:34,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-06 20:09:34,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1192, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 20:09:34,738 INFO L87 Difference]: Start difference. First operand 1460 states and 2356 transitions. Second operand has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:09:41,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:09:41,883 INFO L93 Difference]: Finished difference Result 4119 states and 6253 transitions. [2021-08-06 20:09:41,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-08-06 20:09:41,883 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-06 20:09:41,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:09:41,902 INFO L225 Difference]: With dead ends: 4119 [2021-08-06 20:09:41,902 INFO L226 Difference]: Without dead ends: 3822 [2021-08-06 20:09:41,904 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8814 ImplicationChecksByTransitivity, 5325.5ms TimeCoverageRelationStatistics Valid=2706, Invalid=21474, Unknown=0, NotChecked=0, Total=24180 [2021-08-06 20:09:41,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3822 states. [2021-08-06 20:09:41,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3822 to 1542. [2021-08-06 20:09:41,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1542 states, 1541 states have (on average 1.6145360155743025) internal successors, (2488), 1541 states have internal predecessors, (2488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:09:41,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1542 states to 1542 states and 2488 transitions. [2021-08-06 20:09:41,978 INFO L78 Accepts]: Start accepts. Automaton has 1542 states and 2488 transitions. Word has length 43 [2021-08-06 20:09:41,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:09:41,978 INFO L470 AbstractCegarLoop]: Abstraction has 1542 states and 2488 transitions. [2021-08-06 20:09:41,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:09:41,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1542 states and 2488 transitions. [2021-08-06 20:09:41,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:09:41,981 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:09:41,981 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:09:42,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-06 20:09:42,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-06 20:09:42,226 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:09:42,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:09:42,227 INFO L82 PathProgramCache]: Analyzing trace with hash -155942087, now seen corresponding path program 25 times [2021-08-06 20:09:42,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:09:42,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542161337] [2021-08-06 20:09:42,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:09:42,227 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:09:42,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:09:42,554 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 55.0 percent of original size [2021-08-06 20:09:42,556 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 55.0 percent of original size [2021-08-06 20:09:42,599 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:09:42,601 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:09:42,684 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:09:42,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:09:42,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542161337] [2021-08-06 20:09:42,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542161337] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:09:42,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434460221] [2021-08-06 20:09:42,685 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:09:42,685 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:09:42,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:09:42,685 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:09:42,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-06 20:09:43,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:09:43,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 20:09:43,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:09:44,965 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-06 20:09:44,965 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 [2021-08-06 20:09:45,097 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:09:45,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434460221] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:09:45,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:09:45,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 37 [2021-08-06 20:09:45,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359473070] [2021-08-06 20:09:45,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-06 20:09:45,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:09:45,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-06 20:09:45,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1188, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 20:09:45,098 INFO L87 Difference]: Start difference. First operand 1542 states and 2488 transitions. Second operand has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 37 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:09:48,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:09:48,376 INFO L93 Difference]: Finished difference Result 3858 states and 5900 transitions. [2021-08-06 20:09:48,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-08-06 20:09:48,376 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 37 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-06 20:09:48,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:09:48,384 INFO L225 Difference]: With dead ends: 3858 [2021-08-06 20:09:48,385 INFO L226 Difference]: Without dead ends: 3791 [2021-08-06 20:09:48,386 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3577 ImplicationChecksByTransitivity, 2736.4ms TimeCoverageRelationStatistics Valid=1346, Invalid=9784, Unknown=0, NotChecked=0, Total=11130 [2021-08-06 20:09:48,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3791 states. [2021-08-06 20:09:48,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3791 to 1572. [2021-08-06 20:09:48,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1572 states, 1571 states have (on average 1.6142584341183959) internal successors, (2536), 1571 states have internal predecessors, (2536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:09:48,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1572 states to 1572 states and 2536 transitions. [2021-08-06 20:09:48,419 INFO L78 Accepts]: Start accepts. Automaton has 1572 states and 2536 transitions. Word has length 43 [2021-08-06 20:09:48,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:09:48,420 INFO L470 AbstractCegarLoop]: Abstraction has 1572 states and 2536 transitions. [2021-08-06 20:09:48,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 37 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:09:48,420 INFO L276 IsEmpty]: Start isEmpty. Operand 1572 states and 2536 transitions. [2021-08-06 20:09:48,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:09:48,423 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:09:48,423 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:09:48,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-06 20:09:48,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-06 20:09:48,637 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:09:48,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:09:48,637 INFO L82 PathProgramCache]: Analyzing trace with hash -666831939, now seen corresponding path program 26 times [2021-08-06 20:09:48,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:09:48,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454599822] [2021-08-06 20:09:48,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:09:48,637 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:09:48,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:09:48,910 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 56.1 percent of original size [2021-08-06 20:09:48,912 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 56.1 percent of original size [2021-08-06 20:09:48,936 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:09:48,938 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:09:48,949 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:09:48,951 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:09:49,027 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:09:49,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:09:49,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454599822] [2021-08-06 20:09:49,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454599822] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:09:49,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495101949] [2021-08-06 20:09:49,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:09:49,027 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:09:49,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:09:49,028 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:09:49,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-06 20:09:50,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:09:50,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:09:50,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 20:09:50,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:09:51,384 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-06 20:09:51,385 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 [2021-08-06 20:09:51,508 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:09:51,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495101949] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:09:51,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:09:51,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 36 [2021-08-06 20:09:51,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671262809] [2021-08-06 20:09:51,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-06 20:09:51,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:09:51,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-06 20:09:51,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1121, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 20:09:51,509 INFO L87 Difference]: Start difference. First operand 1572 states and 2536 transitions. Second operand has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:09:56,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:09:56,579 INFO L93 Difference]: Finished difference Result 5541 states and 8568 transitions. [2021-08-06 20:09:56,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-08-06 20:09:56,579 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-06 20:09:56,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:09:56,585 INFO L225 Difference]: With dead ends: 5541 [2021-08-06 20:09:56,585 INFO L226 Difference]: Without dead ends: 5172 [2021-08-06 20:09:56,587 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7107 ImplicationChecksByTransitivity, 3958.0ms TimeCoverageRelationStatistics Valid=2339, Invalid=17121, Unknown=0, NotChecked=0, Total=19460 [2021-08-06 20:09:56,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5172 states. [2021-08-06 20:09:56,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5172 to 1722. [2021-08-06 20:09:56,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1722 states, 1721 states have (on average 1.6234747239976757) internal successors, (2794), 1721 states have internal predecessors, (2794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:09:56,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1722 states to 1722 states and 2794 transitions. [2021-08-06 20:09:56,627 INFO L78 Accepts]: Start accepts. Automaton has 1722 states and 2794 transitions. Word has length 43 [2021-08-06 20:09:56,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:09:56,627 INFO L470 AbstractCegarLoop]: Abstraction has 1722 states and 2794 transitions. [2021-08-06 20:09:56,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:09:56,627 INFO L276 IsEmpty]: Start isEmpty. Operand 1722 states and 2794 transitions. [2021-08-06 20:09:56,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:09:56,630 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:09:56,631 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:09:56,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-06 20:09:56,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-06 20:09:56,845 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:09:56,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:09:56,845 INFO L82 PathProgramCache]: Analyzing trace with hash 567293313, now seen corresponding path program 27 times [2021-08-06 20:09:56,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:09:56,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762768930] [2021-08-06 20:09:56,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:09:56,845 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:09:56,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:09:57,113 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 55.0 percent of original size [2021-08-06 20:09:57,116 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 55.0 percent of original size [2021-08-06 20:09:57,140 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 53.8 percent of original size [2021-08-06 20:09:57,150 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 53.8 percent of original size [2021-08-06 20:09:57,170 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:09:57,173 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:09:57,184 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:09:57,186 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:09:57,261 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:09:57,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:09:57,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762768930] [2021-08-06 20:09:57,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762768930] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:09:57,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746374335] [2021-08-06 20:09:57,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:09:57,262 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:09:57,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:09:57,263 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:09:57,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-06 20:09:58,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 20:09:58,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:09:58,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 20:09:58,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:09:59,691 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-06 20:09:59,691 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 [2021-08-06 20:09:59,833 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:09:59,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746374335] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:09:59,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:09:59,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 37 [2021-08-06 20:09:59,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309176227] [2021-08-06 20:09:59,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-06 20:09:59,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:09:59,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-06 20:09:59,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1186, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 20:09:59,835 INFO L87 Difference]: Start difference. First operand 1722 states and 2794 transitions. Second operand has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:04,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:10:04,391 INFO L93 Difference]: Finished difference Result 5139 states and 7963 transitions. [2021-08-06 20:10:04,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-08-06 20:10:04,392 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-06 20:10:04,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:10:04,399 INFO L225 Difference]: With dead ends: 5139 [2021-08-06 20:10:04,399 INFO L226 Difference]: Without dead ends: 4774 [2021-08-06 20:10:04,400 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7023 ImplicationChecksByTransitivity, 3714.5ms TimeCoverageRelationStatistics Valid=2223, Invalid=16959, Unknown=0, NotChecked=0, Total=19182 [2021-08-06 20:10:04,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4774 states. [2021-08-06 20:10:04,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4774 to 1774. [2021-08-06 20:10:04,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1774 states, 1773 states have (on average 1.631697687535251) internal successors, (2893), 1773 states have internal predecessors, (2893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:04,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1774 states to 1774 states and 2893 transitions. [2021-08-06 20:10:04,432 INFO L78 Accepts]: Start accepts. Automaton has 1774 states and 2893 transitions. Word has length 43 [2021-08-06 20:10:04,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:10:04,432 INFO L470 AbstractCegarLoop]: Abstraction has 1774 states and 2893 transitions. [2021-08-06 20:10:04,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:04,432 INFO L276 IsEmpty]: Start isEmpty. Operand 1774 states and 2893 transitions. [2021-08-06 20:10:04,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:10:04,435 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:10:04,435 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:10:04,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-06 20:10:04,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:10:04,649 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:10:04,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:10:04,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1403919145, now seen corresponding path program 28 times [2021-08-06 20:10:04,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:10:04,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340724291] [2021-08-06 20:10:04,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:10:04,649 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:10:04,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:10:05,032 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 20:10:05,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:10:05,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340724291] [2021-08-06 20:10:05,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340724291] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:05,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430963048] [2021-08-06 20:10:05,033 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:10:05,033 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:10:05,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:10:05,034 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:10:05,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-06 20:10:06,421 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:10:06,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:10:06,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 20:10:06,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:10:07,629 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-06 20:10:07,629 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 [2021-08-06 20:10:07,776 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:10:07,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430963048] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:07,777 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:10:07,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 37 [2021-08-06 20:10:07,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379223848] [2021-08-06 20:10:07,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-06 20:10:07,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:10:07,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-06 20:10:07,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1185, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 20:10:07,781 INFO L87 Difference]: Start difference. First operand 1774 states and 2893 transitions. Second operand has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:12,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:10:12,335 INFO L93 Difference]: Finished difference Result 5031 states and 7654 transitions. [2021-08-06 20:10:12,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-08-06 20:10:12,335 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 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 43 [2021-08-06 20:10:12,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:10:12,340 INFO L225 Difference]: With dead ends: 5031 [2021-08-06 20:10:12,340 INFO L226 Difference]: Without dead ends: 4942 [2021-08-06 20:10:12,341 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4412 ImplicationChecksByTransitivity, 4067.3ms TimeCoverageRelationStatistics Valid=2322, Invalid=11958, Unknown=0, NotChecked=0, Total=14280 [2021-08-06 20:10:12,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4942 states. [2021-08-06 20:10:12,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4942 to 1828. [2021-08-06 20:10:12,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1828 states, 1827 states have (on average 1.6299945265462508) internal successors, (2978), 1827 states have internal predecessors, (2978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:12,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1828 states to 1828 states and 2978 transitions. [2021-08-06 20:10:12,373 INFO L78 Accepts]: Start accepts. Automaton has 1828 states and 2978 transitions. Word has length 43 [2021-08-06 20:10:12,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:10:12,373 INFO L470 AbstractCegarLoop]: Abstraction has 1828 states and 2978 transitions. [2021-08-06 20:10:12,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:12,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1828 states and 2978 transitions. [2021-08-06 20:10:12,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:10:12,376 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:10:12,376 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:10:12,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-06 20:10:12,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:10:12,593 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:10:12,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:10:12,593 INFO L82 PathProgramCache]: Analyzing trace with hash 770134635, now seen corresponding path program 29 times [2021-08-06 20:10:12,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:10:12,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640917080] [2021-08-06 20:10:12,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:10:12,593 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:10:12,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:10:12,941 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 55.0 percent of original size [2021-08-06 20:10:12,943 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 55.0 percent of original size [2021-08-06 20:10:12,974 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:10:12,976 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:10:13,088 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 20:10:13,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:10:13,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640917080] [2021-08-06 20:10:13,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640917080] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:13,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786736667] [2021-08-06 20:10:13,089 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:10:13,089 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:10:13,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:10:13,090 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:10:13,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-06 20:10:14,563 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 20:10:14,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:10:14,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 20:10:14,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:10:15,706 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-06 20:10:15,707 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 [2021-08-06 20:10:15,825 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:10:15,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786736667] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:15,825 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:10:15,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 37 [2021-08-06 20:10:15,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938224420] [2021-08-06 20:10:15,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-06 20:10:15,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:10:15,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-06 20:10:15,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1186, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 20:10:15,826 INFO L87 Difference]: Start difference. First operand 1828 states and 2978 transitions. Second operand has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:19,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:10:19,537 INFO L93 Difference]: Finished difference Result 4455 states and 6797 transitions. [2021-08-06 20:10:19,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-08-06 20:10:19,538 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 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 43 [2021-08-06 20:10:19,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:10:19,542 INFO L225 Difference]: With dead ends: 4455 [2021-08-06 20:10:19,543 INFO L226 Difference]: Without dead ends: 4392 [2021-08-06 20:10:19,543 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4795 ImplicationChecksByTransitivity, 3610.5ms TimeCoverageRelationStatistics Valid=2025, Invalid=12981, Unknown=0, NotChecked=0, Total=15006 [2021-08-06 20:10:19,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4392 states. [2021-08-06 20:10:19,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4392 to 1830. [2021-08-06 20:10:19,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1830 states, 1829 states have (on average 1.6293056314926189) internal successors, (2980), 1829 states have internal predecessors, (2980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:19,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1830 states to 1830 states and 2980 transitions. [2021-08-06 20:10:19,572 INFO L78 Accepts]: Start accepts. Automaton has 1830 states and 2980 transitions. Word has length 43 [2021-08-06 20:10:19,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:10:19,573 INFO L470 AbstractCegarLoop]: Abstraction has 1830 states and 2980 transitions. [2021-08-06 20:10:19,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:19,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1830 states and 2980 transitions. [2021-08-06 20:10:19,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:10:19,576 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:10:19,576 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:10:19,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-06 20:10:19,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:10:19,797 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:10:19,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:10:19,797 INFO L82 PathProgramCache]: Analyzing trace with hash -451752597, now seen corresponding path program 30 times [2021-08-06 20:10:19,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:10:19,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506594201] [2021-08-06 20:10:19,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:10:19,797 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:10:19,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:10:20,003 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 55.0 percent of original size [2021-08-06 20:10:20,005 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 55.0 percent of original size [2021-08-06 20:10:20,027 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 53.8 percent of original size [2021-08-06 20:10:20,037 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 53.8 percent of original size [2021-08-06 20:10:20,060 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:10:20,062 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:10:20,073 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:10:20,075 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:10:20,147 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:10:20,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:10:20,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506594201] [2021-08-06 20:10:20,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506594201] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:20,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868935754] [2021-08-06 20:10:20,147 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:10:20,147 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:10:20,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:10:20,148 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:10:20,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-06 20:10:21,693 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 20:10:21,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:10:21,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 20:10:21,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:10:22,763 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-06 20:10:22,764 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 [2021-08-06 20:10:22,873 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:10:22,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868935754] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:22,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:10:22,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 36 [2021-08-06 20:10:22,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691399457] [2021-08-06 20:10:22,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-06 20:10:22,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:10:22,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-06 20:10:22,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1117, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 20:10:22,875 INFO L87 Difference]: Start difference. First operand 1830 states and 2980 transitions. Second operand has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:28,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:10:28,320 INFO L93 Difference]: Finished difference Result 4700 states and 7299 transitions. [2021-08-06 20:10:28,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-08-06 20:10:28,320 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-06 20:10:28,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:10:28,325 INFO L225 Difference]: With dead ends: 4700 [2021-08-06 20:10:28,325 INFO L226 Difference]: Without dead ends: 4364 [2021-08-06 20:10:28,327 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7900 ImplicationChecksByTransitivity, 4187.9ms TimeCoverageRelationStatistics Valid=2419, Invalid=18751, Unknown=0, NotChecked=0, Total=21170 [2021-08-06 20:10:28,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4364 states. [2021-08-06 20:10:28,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4364 to 1934. [2021-08-06 20:10:28,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1934 states, 1933 states have (on average 1.6316606311433006) internal successors, (3154), 1933 states have internal predecessors, (3154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:28,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1934 states to 1934 states and 3154 transitions. [2021-08-06 20:10:28,357 INFO L78 Accepts]: Start accepts. Automaton has 1934 states and 3154 transitions. Word has length 43 [2021-08-06 20:10:28,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:10:28,358 INFO L470 AbstractCegarLoop]: Abstraction has 1934 states and 3154 transitions. [2021-08-06 20:10:28,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:28,358 INFO L276 IsEmpty]: Start isEmpty. Operand 1934 states and 3154 transitions. [2021-08-06 20:10:28,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:10:28,361 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:10:28,361 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:10:28,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-06 20:10:28,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-08-06 20:10:28,589 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:10:28,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:10:28,590 INFO L82 PathProgramCache]: Analyzing trace with hash 922103269, now seen corresponding path program 31 times [2021-08-06 20:10:28,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:10:28,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630699089] [2021-08-06 20:10:28,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:10:28,590 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:10:28,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:10:28,852 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 20:10:28,855 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 20:10:28,881 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 58.5 percent of original size [2021-08-06 20:10:28,883 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 58.5 percent of original size [2021-08-06 20:10:29,023 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 20:10:29,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:10:29,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630699089] [2021-08-06 20:10:29,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630699089] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:29,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903353297] [2021-08-06 20:10:29,024 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:10:29,024 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:10:29,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:10:29,025 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:10:29,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-06 20:10:30,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:10:30,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 20:10:30,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:10:31,701 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-06 20:10:31,701 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 [2021-08-06 20:10:31,838 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:10:31,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903353297] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:31,839 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:10:31,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 36 [2021-08-06 20:10:31,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846757892] [2021-08-06 20:10:31,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-06 20:10:31,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:10:31,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-06 20:10:31,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1120, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 20:10:31,840 INFO L87 Difference]: Start difference. First operand 1934 states and 3154 transitions. Second operand has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 36 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:37,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:10:37,444 INFO L93 Difference]: Finished difference Result 6160 states and 9565 transitions. [2021-08-06 20:10:37,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-08-06 20:10:37,444 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 36 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 43 [2021-08-06 20:10:37,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:10:37,452 INFO L225 Difference]: With dead ends: 6160 [2021-08-06 20:10:37,452 INFO L226 Difference]: Without dead ends: 5822 [2021-08-06 20:10:37,454 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7643 ImplicationChecksByTransitivity, 4688.2ms TimeCoverageRelationStatistics Valid=2851, Invalid=18611, Unknown=0, NotChecked=0, Total=21462 [2021-08-06 20:10:37,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5822 states. [2021-08-06 20:10:37,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5822 to 2064. [2021-08-06 20:10:37,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2064 states, 2063 states have (on average 1.622879301987397) internal successors, (3348), 2063 states have internal predecessors, (3348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:37,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2064 states to 2064 states and 3348 transitions. [2021-08-06 20:10:37,494 INFO L78 Accepts]: Start accepts. Automaton has 2064 states and 3348 transitions. Word has length 43 [2021-08-06 20:10:37,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:10:37,494 INFO L470 AbstractCegarLoop]: Abstraction has 2064 states and 3348 transitions. [2021-08-06 20:10:37,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 36 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:37,494 INFO L276 IsEmpty]: Start isEmpty. Operand 2064 states and 3348 transitions. [2021-08-06 20:10:37,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:10:37,497 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:10:37,497 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:10:37,526 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-08-06 20:10:37,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:10:37,708 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:10:37,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:10:37,709 INFO L82 PathProgramCache]: Analyzing trace with hash -475574847, now seen corresponding path program 32 times [2021-08-06 20:10:37,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:10:37,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380552292] [2021-08-06 20:10:37,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:10:37,709 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:10:37,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:10:38,043 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 20:10:38,046 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 20:10:38,069 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 58.5 percent of original size [2021-08-06 20:10:38,071 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 58.5 percent of original size [2021-08-06 20:10:38,091 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 55.0 percent of original size [2021-08-06 20:10:38,094 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 55.0 percent of original size [2021-08-06 20:10:38,120 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 53.8 percent of original size [2021-08-06 20:10:38,124 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 53.8 percent of original size [2021-08-06 20:10:38,144 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:10:38,146 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:10:38,158 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:10:38,160 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:10:38,243 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:10:38,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:10:38,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380552292] [2021-08-06 20:10:38,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380552292] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:38,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379571799] [2021-08-06 20:10:38,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:10:38,244 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:10:38,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:10:38,245 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:10:38,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-06 20:10:40,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:10:40,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:10:40,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 20:10:40,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:10:41,393 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-06 20:10:41,393 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 [2021-08-06 20:10:41,519 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:10:41,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379571799] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:41,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:10:41,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 36 [2021-08-06 20:10:41,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050902626] [2021-08-06 20:10:41,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-06 20:10:41,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:10:41,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-06 20:10:41,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1113, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 20:10:41,521 INFO L87 Difference]: Start difference. First operand 2064 states and 3348 transitions. Second operand has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:48,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:10:48,527 INFO L93 Difference]: Finished difference Result 4534 states and 7050 transitions. [2021-08-06 20:10:48,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2021-08-06 20:10:48,528 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-06 20:10:48,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:10:48,534 INFO L225 Difference]: With dead ends: 4534 [2021-08-06 20:10:48,535 INFO L226 Difference]: Without dead ends: 4194 [2021-08-06 20:10:48,536 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8759 ImplicationChecksByTransitivity, 5027.1ms TimeCoverageRelationStatistics Valid=2613, Invalid=20339, Unknown=0, NotChecked=0, Total=22952 [2021-08-06 20:10:48,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4194 states. [2021-08-06 20:10:48,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4194 to 2134. [2021-08-06 20:10:48,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2134 states, 2133 states have (on average 1.6282231598687296) internal successors, (3473), 2133 states have internal predecessors, (3473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:48,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2134 states to 2134 states and 3473 transitions. [2021-08-06 20:10:48,605 INFO L78 Accepts]: Start accepts. Automaton has 2134 states and 3473 transitions. Word has length 43 [2021-08-06 20:10:48,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:10:48,606 INFO L470 AbstractCegarLoop]: Abstraction has 2134 states and 3473 transitions. [2021-08-06 20:10:48,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:48,606 INFO L276 IsEmpty]: Start isEmpty. Operand 2134 states and 3473 transitions. [2021-08-06 20:10:48,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:10:48,611 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:10:48,611 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:10:48,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-06 20:10:48,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:10:48,825 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:10:48,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:10:48,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1972474775, now seen corresponding path program 33 times [2021-08-06 20:10:48,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:10:48,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435386574] [2021-08-06 20:10:48,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:10:48,825 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:10:48,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:10:49,414 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 20:10:49,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:10:49,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435386574] [2021-08-06 20:10:49,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435386574] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:49,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881787695] [2021-08-06 20:10:49,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:10:49,415 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:10:49,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:10:49,416 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:10:49,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-06 20:10:51,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 20:10:51,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:10:51,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 20:10:51,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:10:52,834 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-06 20:10:52,834 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 [2021-08-06 20:10:52,974 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:10:52,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881787695] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:52,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:10:52,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 37 [2021-08-06 20:10:52,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682629882] [2021-08-06 20:10:52,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-06 20:10:52,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:10:52,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-06 20:10:52,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1184, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 20:10:52,976 INFO L87 Difference]: Start difference. First operand 2134 states and 3473 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 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) [2021-08-06 20:10:58,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:10:58,315 INFO L93 Difference]: Finished difference Result 6793 states and 10356 transitions. [2021-08-06 20:10:58,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-08-06 20:10:58,316 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 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 43 [2021-08-06 20:10:58,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:10:58,325 INFO L225 Difference]: With dead ends: 6793 [2021-08-06 20:10:58,325 INFO L226 Difference]: Without dead ends: 6654 [2021-08-06 20:10:58,326 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5565 ImplicationChecksByTransitivity, 4854.6ms TimeCoverageRelationStatistics Valid=2352, Invalid=15204, Unknown=0, NotChecked=0, Total=17556 [2021-08-06 20:10:58,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6654 states. [2021-08-06 20:10:58,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6654 to 2158. [2021-08-06 20:10:58,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2158 states, 2157 states have (on average 1.6258692628650904) internal successors, (3507), 2157 states have internal predecessors, (3507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:58,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2158 states to 2158 states and 3507 transitions. [2021-08-06 20:10:58,372 INFO L78 Accepts]: Start accepts. Automaton has 2158 states and 3507 transitions. Word has length 43 [2021-08-06 20:10:58,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:10:58,372 INFO L470 AbstractCegarLoop]: Abstraction has 2158 states and 3507 transitions. [2021-08-06 20:10:58,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 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) [2021-08-06 20:10:58,372 INFO L276 IsEmpty]: Start isEmpty. Operand 2158 states and 3507 transitions. [2021-08-06 20:10:58,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:10:58,376 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:10:58,376 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:10:58,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-06 20:10:58,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-06 20:10:58,600 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:10:58,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:10:58,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1591739855, now seen corresponding path program 34 times [2021-08-06 20:10:58,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:10:58,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704593231] [2021-08-06 20:10:58,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:10:58,601 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:10:58,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:10:58,803 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 20:10:58,806 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 20:10:58,829 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 58.5 percent of original size [2021-08-06 20:10:58,831 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 58.5 percent of original size [2021-08-06 20:10:58,880 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 55.0 percent of original size [2021-08-06 20:10:58,883 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 55.0 percent of original size [2021-08-06 20:10:58,908 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:10:58,910 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:10:58,999 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-06 20:10:59,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:10:59,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704593231] [2021-08-06 20:10:59,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704593231] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:59,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791970056] [2021-08-06 20:10:59,000 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:10:59,000 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:10:59,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:10:59,001 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:10:59,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-06 20:11:01,090 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:11:01,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:11:01,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 20:11:01,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:11:02,473 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-06 20:11:02,474 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 [2021-08-06 20:11:02,605 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:11:02,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791970056] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:02,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:11:02,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 22] total 35 [2021-08-06 20:11:02,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786276883] [2021-08-06 20:11:02,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-06 20:11:02,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:11:02,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-06 20:11:02,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1054, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 20:11:02,607 INFO L87 Difference]: Start difference. First operand 2158 states and 3507 transitions. Second operand has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 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) [2021-08-06 20:11:06,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:11:06,961 INFO L93 Difference]: Finished difference Result 3928 states and 6002 transitions. [2021-08-06 20:11:06,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-08-06 20:11:06,961 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 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) Word has length 43 [2021-08-06 20:11:06,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:11:06,967 INFO L225 Difference]: With dead ends: 3928 [2021-08-06 20:11:06,967 INFO L226 Difference]: Without dead ends: 3888 [2021-08-06 20:11:06,969 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4831 ImplicationChecksByTransitivity, 4057.3ms TimeCoverageRelationStatistics Valid=1922, Invalid=12598, Unknown=0, NotChecked=0, Total=14520 [2021-08-06 20:11:06,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3888 states. [2021-08-06 20:11:06,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3888 to 2124. [2021-08-06 20:11:06,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2124 states, 2123 states have (on average 1.627885068299576) internal successors, (3456), 2123 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:06,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2124 states to 2124 states and 3456 transitions. [2021-08-06 20:11:06,995 INFO L78 Accepts]: Start accepts. Automaton has 2124 states and 3456 transitions. Word has length 43 [2021-08-06 20:11:06,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:11:06,995 INFO L470 AbstractCegarLoop]: Abstraction has 2124 states and 3456 transitions. [2021-08-06 20:11:06,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 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) [2021-08-06 20:11:06,996 INFO L276 IsEmpty]: Start isEmpty. Operand 2124 states and 3456 transitions. [2021-08-06 20:11:06,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:11:06,999 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:11:06,999 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:11:07,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-06 20:11:07,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-06 20:11:07,213 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:11:07,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:11:07,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1079601381, now seen corresponding path program 35 times [2021-08-06 20:11:07,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:11:07,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157921188] [2021-08-06 20:11:07,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:11:07,214 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:11:07,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:11:07,547 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 63.6 percent of original size [2021-08-06 20:11:07,550 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 63.6 percent of original size [2021-08-06 20:11:07,590 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 60.5 percent of original size [2021-08-06 20:11:07,593 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 60.5 percent of original size [2021-08-06 20:11:07,625 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 58.5 percent of original size [2021-08-06 20:11:07,628 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 58.5 percent of original size [2021-08-06 20:11:07,911 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:11:07,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:11:07,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157921188] [2021-08-06 20:11:07,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157921188] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:07,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40935724] [2021-08-06 20:11:07,911 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:11:07,911 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:11:07,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:11:07,925 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:11:07,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-06 20:11:09,890 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 20:11:09,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:11:09,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 20:11:09,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:11:10,934 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-06 20:11:10,934 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 [2021-08-06 20:11:11,052 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:11:11,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40935724] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:11,052 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:11:11,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 36 [2021-08-06 20:11:11,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326405290] [2021-08-06 20:11:11,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-06 20:11:11,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:11:11,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-06 20:11:11,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 20:11:11,054 INFO L87 Difference]: Start difference. First operand 2124 states and 3456 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 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) [2021-08-06 20:11:14,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:11:14,745 INFO L93 Difference]: Finished difference Result 5659 states and 8644 transitions. [2021-08-06 20:11:14,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-08-06 20:11:14,745 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 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 43 [2021-08-06 20:11:14,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:11:14,752 INFO L225 Difference]: With dead ends: 5659 [2021-08-06 20:11:14,752 INFO L226 Difference]: Without dead ends: 5516 [2021-08-06 20:11:14,753 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4828 ImplicationChecksByTransitivity, 3481.5ms TimeCoverageRelationStatistics Valid=1917, Invalid=12845, Unknown=0, NotChecked=0, Total=14762 [2021-08-06 20:11:14,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5516 states. [2021-08-06 20:11:14,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5516 to 2092. [2021-08-06 20:11:14,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2092 states, 2091 states have (on average 1.6260162601626016) internal successors, (3400), 2091 states have internal predecessors, (3400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:14,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 3400 transitions. [2021-08-06 20:11:14,794 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 3400 transitions. Word has length 43 [2021-08-06 20:11:14,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:11:14,794 INFO L470 AbstractCegarLoop]: Abstraction has 2092 states and 3400 transitions. [2021-08-06 20:11:14,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 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) [2021-08-06 20:11:14,795 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 3400 transitions. [2021-08-06 20:11:14,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:11:14,798 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:11:14,798 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:11:14,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-06 20:11:15,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-06 20:11:15,011 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:11:15,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:11:15,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1800925561, now seen corresponding path program 36 times [2021-08-06 20:11:15,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:11:15,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923608186] [2021-08-06 20:11:15,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:11:15,012 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:11:15,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:11:15,103 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 40.0 percent of original size [2021-08-06 20:11:15,104 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 40.0 percent of original size [2021-08-06 20:11:15,123 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 33.3 percent of original size [2021-08-06 20:11:15,125 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 33.3 percent of original size [2021-08-06 20:11:15,416 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 20:11:15,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:11:15,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923608186] [2021-08-06 20:11:15,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923608186] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:15,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411585166] [2021-08-06 20:11:15,416 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:11:15,416 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:11:15,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:11:15,417 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:11:15,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-06 20:11:17,414 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 20:11:17,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:11:17,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-06 20:11:17,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:11:18,437 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-06 20:11:18,437 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 [2021-08-06 20:11:18,552 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:11:18,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411585166] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:18,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:11:18,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 37 [2021-08-06 20:11:18,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074852664] [2021-08-06 20:11:18,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-06 20:11:18,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:11:18,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-06 20:11:18,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1186, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 20:11:18,554 INFO L87 Difference]: Start difference. First operand 2092 states and 3400 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 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) [2021-08-06 20:11:21,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:11:21,960 INFO L93 Difference]: Finished difference Result 6347 states and 9734 transitions. [2021-08-06 20:11:21,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-08-06 20:11:21,961 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 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 43 [2021-08-06 20:11:21,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:11:21,969 INFO L225 Difference]: With dead ends: 6347 [2021-08-06 20:11:21,969 INFO L226 Difference]: Without dead ends: 6214 [2021-08-06 20:11:21,970 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3879 ImplicationChecksByTransitivity, 3007.5ms TimeCoverageRelationStatistics Valid=1546, Invalid=11110, Unknown=0, NotChecked=0, Total=12656 [2021-08-06 20:11:21,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6214 states. [2021-08-06 20:11:22,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6214 to 2170. [2021-08-06 20:11:22,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2170 states, 2169 states have (on average 1.623789764868603) internal successors, (3522), 2169 states have internal predecessors, (3522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:22,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2170 states to 2170 states and 3522 transitions. [2021-08-06 20:11:22,010 INFO L78 Accepts]: Start accepts. Automaton has 2170 states and 3522 transitions. Word has length 43 [2021-08-06 20:11:22,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:11:22,010 INFO L470 AbstractCegarLoop]: Abstraction has 2170 states and 3522 transitions. [2021-08-06 20:11:22,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 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) [2021-08-06 20:11:22,011 INFO L276 IsEmpty]: Start isEmpty. Operand 2170 states and 3522 transitions. [2021-08-06 20:11:22,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:11:22,014 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:11:22,014 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:11:22,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-06 20:11:22,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-06 20:11:22,223 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:11:22,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:11:22,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1190651655, now seen corresponding path program 37 times [2021-08-06 20:11:22,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:11:22,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225751182] [2021-08-06 20:11:22,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:11:22,224 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:11:22,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:11:22,311 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 40.0 percent of original size [2021-08-06 20:11:22,313 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 40.0 percent of original size [2021-08-06 20:11:22,332 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 33.3 percent of original size [2021-08-06 20:11:22,334 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 33.3 percent of original size [2021-08-06 20:11:22,490 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 55.0 percent of original size [2021-08-06 20:11:22,492 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 55.0 percent of original size [2021-08-06 20:11:22,517 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:11:22,519 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:11:22,610 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 20:11:22,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:11:22,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225751182] [2021-08-06 20:11:22,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225751182] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:22,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314645472] [2021-08-06 20:11:22,611 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:11:22,611 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:11:22,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:11:22,618 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:11:22,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-06 20:11:24,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:11:24,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 20:11:24,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:11:25,817 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-06 20:11:25,817 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 [2021-08-06 20:11:25,942 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:11:25,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314645472] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:25,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:11:25,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 37 [2021-08-06 20:11:25,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834848644] [2021-08-06 20:11:25,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-06 20:11:25,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:11:25,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-06 20:11:25,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1188, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 20:11:25,943 INFO L87 Difference]: Start difference. First operand 2170 states and 3522 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 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) [2021-08-06 20:11:29,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:11:29,411 INFO L93 Difference]: Finished difference Result 4166 states and 6338 transitions. [2021-08-06 20:11:29,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-08-06 20:11:29,412 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 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 43 [2021-08-06 20:11:29,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:11:29,416 INFO L225 Difference]: With dead ends: 4166 [2021-08-06 20:11:29,416 INFO L226 Difference]: Without dead ends: 4134 [2021-08-06 20:11:29,417 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4288 ImplicationChecksByTransitivity, 3210.1ms TimeCoverageRelationStatistics Valid=1673, Invalid=11667, Unknown=0, NotChecked=0, Total=13340 [2021-08-06 20:11:29,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4134 states. [2021-08-06 20:11:29,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4134 to 2176. [2021-08-06 20:11:29,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2176 states, 2175 states have (on average 1.6229885057471265) internal successors, (3530), 2175 states have internal predecessors, (3530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:29,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 3530 transitions. [2021-08-06 20:11:29,451 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 3530 transitions. Word has length 43 [2021-08-06 20:11:29,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:11:29,451 INFO L470 AbstractCegarLoop]: Abstraction has 2176 states and 3530 transitions. [2021-08-06 20:11:29,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 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) [2021-08-06 20:11:29,452 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 3530 transitions. [2021-08-06 20:11:29,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:11:29,455 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:11:29,455 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:11:29,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-06 20:11:29,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-06 20:11:29,669 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:11:29,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:11:29,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1411526871, now seen corresponding path program 38 times [2021-08-06 20:11:29,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:11:29,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762195121] [2021-08-06 20:11:29,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:11:29,669 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:11:29,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:11:29,760 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 40.0 percent of original size [2021-08-06 20:11:29,762 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 40.0 percent of original size [2021-08-06 20:11:29,781 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 33.3 percent of original size [2021-08-06 20:11:29,782 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 33.3 percent of original size [2021-08-06 20:11:29,920 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 55.0 percent of original size [2021-08-06 20:11:29,922 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 55.0 percent of original size [2021-08-06 20:11:29,946 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:11:29,948 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:11:30,068 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 20:11:30,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:11:30,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762195121] [2021-08-06 20:11:30,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762195121] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:30,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482228957] [2021-08-06 20:11:30,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:11:30,069 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:11:30,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:11:30,073 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:11:30,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-06 20:11:32,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:11:32,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:11:32,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 20:11:32,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:11:33,358 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-06 20:11:33,358 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 [2021-08-06 20:11:33,505 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:11:33,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482228957] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:33,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:11:33,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 36 [2021-08-06 20:11:33,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619579191] [2021-08-06 20:11:33,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-06 20:11:33,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:11:33,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-06 20:11:33,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1122, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 20:11:33,515 INFO L87 Difference]: Start difference. First operand 2176 states and 3530 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 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) [2021-08-06 20:11:39,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:11:39,815 INFO L93 Difference]: Finished difference Result 4141 states and 6333 transitions. [2021-08-06 20:11:39,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-08-06 20:11:39,816 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 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 43 [2021-08-06 20:11:39,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:11:39,821 INFO L225 Difference]: With dead ends: 4141 [2021-08-06 20:11:39,821 INFO L226 Difference]: Without dead ends: 4081 [2021-08-06 20:11:39,823 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7916 ImplicationChecksByTransitivity, 5422.1ms TimeCoverageRelationStatistics Valid=2776, Invalid=19574, Unknown=0, NotChecked=0, Total=22350 [2021-08-06 20:11:39,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4081 states. [2021-08-06 20:11:39,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4081 to 2216. [2021-08-06 20:11:39,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2216 states, 2215 states have (on average 1.6203160270880361) internal successors, (3589), 2215 states have internal predecessors, (3589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:39,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2216 states to 2216 states and 3589 transitions. [2021-08-06 20:11:39,869 INFO L78 Accepts]: Start accepts. Automaton has 2216 states and 3589 transitions. Word has length 43 [2021-08-06 20:11:39,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:11:39,869 INFO L470 AbstractCegarLoop]: Abstraction has 2216 states and 3589 transitions. [2021-08-06 20:11:39,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 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) [2021-08-06 20:11:39,869 INFO L276 IsEmpty]: Start isEmpty. Operand 2216 states and 3589 transitions. [2021-08-06 20:11:39,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:11:39,873 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:11:39,873 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:11:39,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-06 20:11:40,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-08-06 20:11:40,074 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:11:40,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:11:40,074 INFO L82 PathProgramCache]: Analyzing trace with hash -488255301, now seen corresponding path program 39 times [2021-08-06 20:11:40,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:11:40,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728477096] [2021-08-06 20:11:40,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:11:40,074 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:11:40,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:11:40,205 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 69.0 percent of original size [2021-08-06 20:11:40,217 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 69.0 percent of original size [2021-08-06 20:11:40,244 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 63.2 percent of original size [2021-08-06 20:11:40,246 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 63.2 percent of original size [2021-08-06 20:11:40,285 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 38.5 percent of original size [2021-08-06 20:11:40,287 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 38.5 percent of original size [2021-08-06 20:11:40,324 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 36.8 percent of original size [2021-08-06 20:11:40,325 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 36.8 percent of original size [2021-08-06 20:11:40,340 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 33.3 percent of original size [2021-08-06 20:11:40,357 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 33.3 percent of original size [2021-08-06 20:11:40,515 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 20:11:40,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:11:40,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728477096] [2021-08-06 20:11:40,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728477096] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:40,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011353776] [2021-08-06 20:11:40,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:11:40,515 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:11:40,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:11:40,516 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:11:40,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-06 20:11:42,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 20:11:42,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:11:42,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 20:11:42,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:11:44,232 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-06 20:11:44,232 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 [2021-08-06 20:11:44,351 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:11:44,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011353776] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:44,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:11:44,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 36 [2021-08-06 20:11:44,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824640747] [2021-08-06 20:11:44,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-06 20:11:44,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:11:44,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-06 20:11:44,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1113, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 20:11:44,353 INFO L87 Difference]: Start difference. First operand 2216 states and 3589 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 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) [2021-08-06 20:11:48,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:11:48,909 INFO L93 Difference]: Finished difference Result 6023 states and 9145 transitions. [2021-08-06 20:11:48,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-08-06 20:11:48,909 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 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 43 [2021-08-06 20:11:48,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:11:48,916 INFO L225 Difference]: With dead ends: 6023 [2021-08-06 20:11:48,916 INFO L226 Difference]: Without dead ends: 5883 [2021-08-06 20:11:48,917 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6281 ImplicationChecksByTransitivity, 4055.7ms TimeCoverageRelationStatistics Valid=2263, Invalid=15827, Unknown=0, NotChecked=0, Total=18090 [2021-08-06 20:11:48,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5883 states. [2021-08-06 20:11:48,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5883 to 2350. [2021-08-06 20:11:48,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2350 states, 2349 states have (on average 1.6108982545764154) internal successors, (3784), 2349 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:48,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2350 states to 2350 states and 3784 transitions. [2021-08-06 20:11:48,966 INFO L78 Accepts]: Start accepts. Automaton has 2350 states and 3784 transitions. Word has length 43 [2021-08-06 20:11:48,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:11:48,966 INFO L470 AbstractCegarLoop]: Abstraction has 2350 states and 3784 transitions. [2021-08-06 20:11:48,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 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) [2021-08-06 20:11:48,966 INFO L276 IsEmpty]: Start isEmpty. Operand 2350 states and 3784 transitions. [2021-08-06 20:11:48,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:11:48,982 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:11:48,982 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:11:49,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-06 20:11:49,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-08-06 20:11:49,209 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:11:49,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:11:49,209 INFO L82 PathProgramCache]: Analyzing trace with hash -179144767, now seen corresponding path program 40 times [2021-08-06 20:11:49,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:11:49,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485564721] [2021-08-06 20:11:49,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:11:49,209 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:11:49,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:11:49,404 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 38.5 percent of original size [2021-08-06 20:11:49,406 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 38.5 percent of original size [2021-08-06 20:11:49,428 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 36.8 percent of original size [2021-08-06 20:11:49,429 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 36.8 percent of original size [2021-08-06 20:11:49,446 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 33.3 percent of original size [2021-08-06 20:11:49,448 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 33.3 percent of original size [2021-08-06 20:11:49,790 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:11:49,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:11:49,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485564721] [2021-08-06 20:11:49,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485564721] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:49,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721777743] [2021-08-06 20:11:49,791 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:11:49,791 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:11:49,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:11:49,792 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:11:49,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-06 20:11:52,284 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:11:52,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:11:52,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 20:11:52,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:11:53,386 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-06 20:11:53,387 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 [2021-08-06 20:11:53,519 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:11:53,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721777743] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:53,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:11:53,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-08-06 20:11:53,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251278078] [2021-08-06 20:11:53,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-06 20:11:53,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:11:53,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-06 20:11:53,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1254, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 20:11:53,521 INFO L87 Difference]: Start difference. First operand 2350 states and 3784 transitions. Second operand has 38 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:57,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:11:57,411 INFO L93 Difference]: Finished difference Result 6495 states and 9945 transitions. [2021-08-06 20:11:57,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-08-06 20:11:57,412 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 38 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 43 [2021-08-06 20:11:57,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:11:57,421 INFO L225 Difference]: With dead ends: 6495 [2021-08-06 20:11:57,421 INFO L226 Difference]: Without dead ends: 6362 [2021-08-06 20:11:57,422 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4347 ImplicationChecksByTransitivity, 3492.2ms TimeCoverageRelationStatistics Valid=1630, Invalid=12176, Unknown=0, NotChecked=0, Total=13806 [2021-08-06 20:11:57,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6362 states. [2021-08-06 20:11:57,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6362 to 2414. [2021-08-06 20:11:57,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2414 states, 2413 states have (on average 1.6104434314131786) internal successors, (3886), 2413 states have internal predecessors, (3886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:57,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2414 states to 2414 states and 3886 transitions. [2021-08-06 20:11:57,470 INFO L78 Accepts]: Start accepts. Automaton has 2414 states and 3886 transitions. Word has length 43 [2021-08-06 20:11:57,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:11:57,472 INFO L470 AbstractCegarLoop]: Abstraction has 2414 states and 3886 transitions. [2021-08-06 20:11:57,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:57,472 INFO L276 IsEmpty]: Start isEmpty. Operand 2414 states and 3886 transitions. [2021-08-06 20:11:57,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:11:57,476 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:11:57,476 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:11:57,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-06 20:11:57,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-08-06 20:11:57,700 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:11:57,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:11:57,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1124245313, now seen corresponding path program 41 times [2021-08-06 20:11:57,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:11:57,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467490072] [2021-08-06 20:11:57,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:11:57,701 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:11:57,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:11:57,820 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 38.5 percent of original size [2021-08-06 20:11:57,822 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 38.5 percent of original size [2021-08-06 20:11:57,857 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 36.8 percent of original size [2021-08-06 20:11:57,859 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 36.8 percent of original size [2021-08-06 20:11:57,873 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 33.3 percent of original size [2021-08-06 20:11:57,875 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 33.3 percent of original size [2021-08-06 20:11:58,079 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 55.0 percent of original size [2021-08-06 20:11:58,082 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 55.0 percent of original size [2021-08-06 20:11:58,114 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:11:58,116 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:11:58,235 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:11:58,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:11:58,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467490072] [2021-08-06 20:11:58,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467490072] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:58,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383959806] [2021-08-06 20:11:58,236 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:11:58,236 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:11:58,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:11:58,237 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:11:58,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-06 20:12:00,600 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 20:12:00,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:12:00,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 20:12:00,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:12:01,680 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-06 20:12:01,680 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 [2021-08-06 20:12:01,819 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:12:01,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383959806] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:01,820 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:12:01,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-08-06 20:12:01,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352225071] [2021-08-06 20:12:01,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-06 20:12:01,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:12:01,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-06 20:12:01,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1256, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 20:12:01,823 INFO L87 Difference]: Start difference. First operand 2414 states and 3886 transitions. Second operand has 38 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:05,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:12:05,507 INFO L93 Difference]: Finished difference Result 4804 states and 7251 transitions. [2021-08-06 20:12:05,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-08-06 20:12:05,507 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 38 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 43 [2021-08-06 20:12:05,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:12:05,513 INFO L225 Difference]: With dead ends: 4804 [2021-08-06 20:12:05,513 INFO L226 Difference]: Without dead ends: 4772 [2021-08-06 20:12:05,515 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3522 ImplicationChecksByTransitivity, 3334.7ms TimeCoverageRelationStatistics Valid=1410, Invalid=9932, Unknown=0, NotChecked=0, Total=11342 [2021-08-06 20:12:05,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4772 states. [2021-08-06 20:12:05,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4772 to 2398. [2021-08-06 20:12:05,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2398 states, 2397 states have (on average 1.611180642469754) internal successors, (3862), 2397 states have internal predecessors, (3862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:05,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2398 states to 2398 states and 3862 transitions. [2021-08-06 20:12:05,597 INFO L78 Accepts]: Start accepts. Automaton has 2398 states and 3862 transitions. Word has length 43 [2021-08-06 20:12:05,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:12:05,597 INFO L470 AbstractCegarLoop]: Abstraction has 2398 states and 3862 transitions. [2021-08-06 20:12:05,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:05,597 INFO L276 IsEmpty]: Start isEmpty. Operand 2398 states and 3862 transitions. [2021-08-06 20:12:05,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:12:05,622 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:12:05,622 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:12:05,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-06 20:12:05,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:12:05,845 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:12:05,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:12:05,845 INFO L82 PathProgramCache]: Analyzing trace with hash 394707625, now seen corresponding path program 42 times [2021-08-06 20:12:05,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:12:05,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089067820] [2021-08-06 20:12:05,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:12:05,846 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:12:05,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:12:05,961 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 38.5 percent of original size [2021-08-06 20:12:05,963 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 38.5 percent of original size [2021-08-06 20:12:05,990 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 36.8 percent of original size [2021-08-06 20:12:05,999 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 36.8 percent of original size [2021-08-06 20:12:06,013 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 33.3 percent of original size [2021-08-06 20:12:06,015 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 33.3 percent of original size [2021-08-06 20:12:06,300 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 20:12:06,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:12:06,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089067820] [2021-08-06 20:12:06,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089067820] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:06,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558919869] [2021-08-06 20:12:06,300 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:12:06,300 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:12:06,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:12:06,301 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:12:06,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-06 20:12:08,738 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 20:12:08,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:12:08,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 20:12:08,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:12:09,800 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-06 20:12:09,800 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 [2021-08-06 20:12:09,914 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:12:09,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558919869] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:09,914 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:12:09,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 37 [2021-08-06 20:12:09,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159524633] [2021-08-06 20:12:09,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-06 20:12:09,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:12:09,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-06 20:12:09,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 20:12:09,915 INFO L87 Difference]: Start difference. First operand 2398 states and 3862 transitions. Second operand has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:15,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:12:15,352 INFO L93 Difference]: Finished difference Result 6044 states and 9160 transitions. [2021-08-06 20:12:15,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-08-06 20:12:15,352 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 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 43 [2021-08-06 20:12:15,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:12:15,358 INFO L225 Difference]: With dead ends: 6044 [2021-08-06 20:12:15,359 INFO L226 Difference]: Without dead ends: 5895 [2021-08-06 20:12:15,360 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7786 ImplicationChecksByTransitivity, 4429.8ms TimeCoverageRelationStatistics Valid=2801, Invalid=19251, Unknown=0, NotChecked=0, Total=22052 [2021-08-06 20:12:15,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5895 states. [2021-08-06 20:12:15,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5895 to 2360. [2021-08-06 20:12:15,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2360 states, 2359 states have (on average 1.6074607884696905) internal successors, (3792), 2359 states have internal predecessors, (3792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:15,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2360 states to 2360 states and 3792 transitions. [2021-08-06 20:12:15,392 INFO L78 Accepts]: Start accepts. Automaton has 2360 states and 3792 transitions. Word has length 43 [2021-08-06 20:12:15,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:12:15,392 INFO L470 AbstractCegarLoop]: Abstraction has 2360 states and 3792 transitions. [2021-08-06 20:12:15,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:15,392 INFO L276 IsEmpty]: Start isEmpty. Operand 2360 states and 3792 transitions. [2021-08-06 20:12:15,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:12:15,395 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:12:15,395 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:12:15,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-06 20:12:15,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:12:15,596 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:12:15,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:12:15,596 INFO L82 PathProgramCache]: Analyzing trace with hash 903370097, now seen corresponding path program 43 times [2021-08-06 20:12:15,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:12:15,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394644365] [2021-08-06 20:12:15,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:12:15,596 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:12:15,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:12:15,662 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 38.5 percent of original size [2021-08-06 20:12:15,664 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 38.5 percent of original size [2021-08-06 20:12:15,683 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 36.8 percent of original size [2021-08-06 20:12:15,685 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 36.8 percent of original size [2021-08-06 20:12:15,699 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 33.3 percent of original size [2021-08-06 20:12:15,701 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 33.3 percent of original size [2021-08-06 20:12:15,840 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 55.0 percent of original size [2021-08-06 20:12:15,842 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 55.0 percent of original size [2021-08-06 20:12:15,863 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:12:15,865 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:12:15,944 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 20:12:15,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:12:15,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394644365] [2021-08-06 20:12:15,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394644365] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:15,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428823626] [2021-08-06 20:12:15,944 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:12:15,944 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:12:15,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:12:15,945 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:12:15,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-06 20:12:18,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:12:18,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 20:12:18,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:12:19,624 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-06 20:12:19,625 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 [2021-08-06 20:12:19,761 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:12:19,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428823626] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:19,761 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:12:19,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 37 [2021-08-06 20:12:19,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597327427] [2021-08-06 20:12:19,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-06 20:12:19,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:12:19,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-06 20:12:19,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1188, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 20:12:19,762 INFO L87 Difference]: Start difference. First operand 2360 states and 3792 transitions. Second operand has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:24,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:12:24,069 INFO L93 Difference]: Finished difference Result 4811 states and 7234 transitions. [2021-08-06 20:12:24,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-08-06 20:12:24,069 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 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 43 [2021-08-06 20:12:24,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:12:24,074 INFO L225 Difference]: With dead ends: 4811 [2021-08-06 20:12:24,075 INFO L226 Difference]: Without dead ends: 4759 [2021-08-06 20:12:24,076 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5580 ImplicationChecksByTransitivity, 3857.7ms TimeCoverageRelationStatistics Valid=1986, Invalid=14270, Unknown=0, NotChecked=0, Total=16256 [2021-08-06 20:12:24,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4759 states. [2021-08-06 20:12:24,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4759 to 2414. [2021-08-06 20:12:24,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2414 states, 2413 states have (on average 1.6058847907169498) internal successors, (3875), 2413 states have internal predecessors, (3875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:24,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2414 states to 2414 states and 3875 transitions. [2021-08-06 20:12:24,111 INFO L78 Accepts]: Start accepts. Automaton has 2414 states and 3875 transitions. Word has length 43 [2021-08-06 20:12:24,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:12:24,111 INFO L470 AbstractCegarLoop]: Abstraction has 2414 states and 3875 transitions. [2021-08-06 20:12:24,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:24,111 INFO L276 IsEmpty]: Start isEmpty. Operand 2414 states and 3875 transitions. [2021-08-06 20:12:24,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:12:24,115 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:12:24,115 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:12:24,153 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-08-06 20:12:24,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-06 20:12:24,329 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:12:24,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:12:24,329 INFO L82 PathProgramCache]: Analyzing trace with hash -844699569, now seen corresponding path program 44 times [2021-08-06 20:12:24,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:12:24,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662844297] [2021-08-06 20:12:24,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:12:24,329 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:12:24,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:12:24,517 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 38.5 percent of original size [2021-08-06 20:12:24,519 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 38.5 percent of original size [2021-08-06 20:12:24,609 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 36.8 percent of original size [2021-08-06 20:12:24,611 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 36.8 percent of original size [2021-08-06 20:12:24,628 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 33.3 percent of original size [2021-08-06 20:12:24,629 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 33.3 percent of original size [2021-08-06 20:12:24,698 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 20:12:24,701 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 20:12:24,738 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 58.5 percent of original size [2021-08-06 20:12:24,740 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 58.5 percent of original size [2021-08-06 20:12:24,799 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 55.0 percent of original size [2021-08-06 20:12:24,801 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 55.0 percent of original size [2021-08-06 20:12:24,823 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:12:24,825 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:12:24,900 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 20:12:24,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:12:24,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662844297] [2021-08-06 20:12:24,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662844297] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:24,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274629310] [2021-08-06 20:12:24,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:12:24,900 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:12:24,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:12:24,901 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:12:24,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-06 20:12:27,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:12:27,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:12:27,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 20:12:27,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:12:28,840 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-06 20:12:28,841 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 [2021-08-06 20:12:28,967 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:12:28,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274629310] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:28,968 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:12:28,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 22] total 35 [2021-08-06 20:12:28,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198360964] [2021-08-06 20:12:28,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-06 20:12:28,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:12:28,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-06 20:12:28,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1048, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 20:12:28,970 INFO L87 Difference]: Start difference. First operand 2414 states and 3875 transitions. Second operand has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 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) [2021-08-06 20:12:32,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:12:32,464 INFO L93 Difference]: Finished difference Result 3774 states and 5794 transitions. [2021-08-06 20:12:32,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-08-06 20:12:32,465 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 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) Word has length 43 [2021-08-06 20:12:32,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:12:32,469 INFO L225 Difference]: With dead ends: 3774 [2021-08-06 20:12:32,469 INFO L226 Difference]: Without dead ends: 3734 [2021-08-06 20:12:32,470 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3882 ImplicationChecksByTransitivity, 3439.7ms TimeCoverageRelationStatistics Valid=1711, Invalid=10279, Unknown=0, NotChecked=0, Total=11990 [2021-08-06 20:12:32,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3734 states. [2021-08-06 20:12:32,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3734 to 2376. [2021-08-06 20:12:32,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2376 states, 2375 states have (on average 1.608) internal successors, (3819), 2375 states have internal predecessors, (3819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:32,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2376 states to 2376 states and 3819 transitions. [2021-08-06 20:12:32,498 INFO L78 Accepts]: Start accepts. Automaton has 2376 states and 3819 transitions. Word has length 43 [2021-08-06 20:12:32,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:12:32,498 INFO L470 AbstractCegarLoop]: Abstraction has 2376 states and 3819 transitions. [2021-08-06 20:12:32,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 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) [2021-08-06 20:12:32,499 INFO L276 IsEmpty]: Start isEmpty. Operand 2376 states and 3819 transitions. [2021-08-06 20:12:32,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-06 20:12:32,501 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:12:32,501 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:12:32,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-06 20:12:32,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-06 20:12:32,702 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:12:32,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:12:32,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1327933258, now seen corresponding path program 45 times [2021-08-06 20:12:32,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:12:32,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738588802] [2021-08-06 20:12:32,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:12:32,703 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:12:32,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:12:32,800 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:12:32,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:12:32,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738588802] [2021-08-06 20:12:32,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738588802] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:32,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710167293] [2021-08-06 20:12:32,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:12:32,801 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:12:32,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:12:32,802 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:12:32,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-06 20:12:35,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 20:12:35,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:12:35,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 20:12:35,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:12:35,523 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:12:35,524 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:12:35,558 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:12:35,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710167293] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:35,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:12:35,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-06 20:12:35,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112369553] [2021-08-06 20:12:35,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 20:12:35,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:12:35,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 20:12:35,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-08-06 20:12:35,559 INFO L87 Difference]: Start difference. First operand 2376 states and 3819 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:35,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:12:35,578 INFO L93 Difference]: Finished difference Result 2971 states and 4681 transitions. [2021-08-06 20:12:35,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 20:12:35,579 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-08-06 20:12:35,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:12:35,582 INFO L225 Difference]: With dead ends: 2971 [2021-08-06 20:12:35,583 INFO L226 Difference]: Without dead ends: 2927 [2021-08-06 20:12:35,583 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 24.3ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-08-06 20:12:35,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2927 states. [2021-08-06 20:12:35,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2927 to 2523. [2021-08-06 20:12:35,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2523 states, 2522 states have (on average 1.6011102299762094) internal successors, (4038), 2522 states have internal predecessors, (4038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:35,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2523 states to 2523 states and 4038 transitions. [2021-08-06 20:12:35,607 INFO L78 Accepts]: Start accepts. Automaton has 2523 states and 4038 transitions. Word has length 46 [2021-08-06 20:12:35,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:12:35,607 INFO L470 AbstractCegarLoop]: Abstraction has 2523 states and 4038 transitions. [2021-08-06 20:12:35,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:35,607 INFO L276 IsEmpty]: Start isEmpty. Operand 2523 states and 4038 transitions. [2021-08-06 20:12:35,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-06 20:12:35,610 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:12:35,610 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:12:35,633 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-08-06 20:12:35,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-08-06 20:12:35,812 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:12:35,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:12:35,812 INFO L82 PathProgramCache]: Analyzing trace with hash 426297506, now seen corresponding path program 46 times [2021-08-06 20:12:35,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:12:35,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158658563] [2021-08-06 20:12:35,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:12:35,812 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:12:35,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:12:36,445 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:12:36,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:12:36,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158658563] [2021-08-06 20:12:36,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158658563] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:36,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361316009] [2021-08-06 20:12:36,445 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:12:36,445 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:12:36,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:12:36,446 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:12:36,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-06 20:12:38,972 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:12:38,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:12:38,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-06 20:12:38,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:12:40,616 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-06 20:12:40,616 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 [2021-08-06 20:12:40,752 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:12:40,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361316009] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:40,753 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:12:40,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 48 [2021-08-06 20:12:40,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17481663] [2021-08-06 20:12:40,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-08-06 20:12:40,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:12:40,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-08-06 20:12:40,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=2044, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 20:12:40,754 INFO L87 Difference]: Start difference. First operand 2523 states and 4038 transitions. Second operand has 48 states, 48 states have (on average 1.8333333333333333) internal successors, (88), 48 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:49,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:12:49,151 INFO L93 Difference]: Finished difference Result 8678 states and 13285 transitions. [2021-08-06 20:12:49,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-08-06 20:12:49,151 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.8333333333333333) internal successors, (88), 48 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-06 20:12:49,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:12:49,163 INFO L225 Difference]: With dead ends: 8678 [2021-08-06 20:12:49,163 INFO L226 Difference]: Without dead ends: 8133 [2021-08-06 20:12:49,165 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7847 ImplicationChecksByTransitivity, 6316.3ms TimeCoverageRelationStatistics Valid=2862, Invalid=21630, Unknown=0, NotChecked=0, Total=24492 [2021-08-06 20:12:49,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8133 states. [2021-08-06 20:12:49,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8133 to 2681. [2021-08-06 20:12:49,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2681 states, 2680 states have (on average 1.6100746268656716) internal successors, (4315), 2680 states have internal predecessors, (4315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:49,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2681 states to 2681 states and 4315 transitions. [2021-08-06 20:12:49,221 INFO L78 Accepts]: Start accepts. Automaton has 2681 states and 4315 transitions. Word has length 49 [2021-08-06 20:12:49,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:12:49,221 INFO L470 AbstractCegarLoop]: Abstraction has 2681 states and 4315 transitions. [2021-08-06 20:12:49,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.8333333333333333) internal successors, (88), 48 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:49,221 INFO L276 IsEmpty]: Start isEmpty. Operand 2681 states and 4315 transitions. [2021-08-06 20:12:49,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-06 20:12:49,226 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:12:49,226 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:12:49,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-08-06 20:12:49,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:12:49,453 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:12:49,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:12:49,453 INFO L82 PathProgramCache]: Analyzing trace with hash -381857758, now seen corresponding path program 47 times [2021-08-06 20:12:49,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:12:49,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612600625] [2021-08-06 20:12:49,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:12:49,453 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:12:49,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:12:50,493 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:12:50,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:12:50,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612600625] [2021-08-06 20:12:50,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612600625] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:50,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687022569] [2021-08-06 20:12:50,494 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:12:50,494 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:12:50,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:12:50,495 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:12:50,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-06 20:12:53,624 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 20:12:53,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:12:53,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-06 20:12:53,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:12:55,587 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-06 20:12:55,587 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 [2021-08-06 20:12:55,761 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:12:55,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687022569] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:55,761 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:12:55,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 48 [2021-08-06 20:12:55,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366896800] [2021-08-06 20:12:55,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-08-06 20:12:55,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:12:55,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-08-06 20:12:55,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=2048, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 20:12:55,763 INFO L87 Difference]: Start difference. First operand 2681 states and 4315 transitions. Second operand has 48 states, 48 states have (on average 1.8333333333333333) internal successors, (88), 48 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:13:02,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:13:02,467 INFO L93 Difference]: Finished difference Result 7625 states and 11543 transitions. [2021-08-06 20:13:02,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-08-06 20:13:02,467 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.8333333333333333) internal successors, (88), 48 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-06 20:13:02,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:13:02,476 INFO L225 Difference]: With dead ends: 7625 [2021-08-06 20:13:02,477 INFO L226 Difference]: Without dead ends: 7480 [2021-08-06 20:13:02,478 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7354 ImplicationChecksByTransitivity, 5931.2ms TimeCoverageRelationStatistics Valid=2739, Invalid=20517, Unknown=0, NotChecked=0, Total=23256 [2021-08-06 20:13:02,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7480 states. [2021-08-06 20:13:02,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7480 to 2715. [2021-08-06 20:13:02,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2715 states, 2714 states have (on average 1.6083271923360354) internal successors, (4365), 2714 states have internal predecessors, (4365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:13:02,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2715 states to 2715 states and 4365 transitions. [2021-08-06 20:13:02,523 INFO L78 Accepts]: Start accepts. Automaton has 2715 states and 4365 transitions. Word has length 49 [2021-08-06 20:13:02,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:13:02,523 INFO L470 AbstractCegarLoop]: Abstraction has 2715 states and 4365 transitions. [2021-08-06 20:13:02,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.8333333333333333) internal successors, (88), 48 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:13:02,523 INFO L276 IsEmpty]: Start isEmpty. Operand 2715 states and 4365 transitions. [2021-08-06 20:13:02,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-06 20:13:02,526 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:13:02,526 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:13:02,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-08-06 20:13:02,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-06 20:13:02,727 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:13:02,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:13:02,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1252521458, now seen corresponding path program 48 times [2021-08-06 20:13:02,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:13:02,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100465373] [2021-08-06 20:13:02,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:13:02,727 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:13:02,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:13:03,542 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:13:03,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:13:03,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100465373] [2021-08-06 20:13:03,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100465373] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:13:03,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899295724] [2021-08-06 20:13:03,543 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:13:03,543 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:13:03,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:13:03,543 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:13:03,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-06 20:13:06,457 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 20:13:06,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:13:06,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-06 20:13:06,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:13:08,511 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-06 20:13:08,511 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 [2021-08-06 20:13:08,688 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:13:08,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899295724] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:13:08,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:13:08,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 48 [2021-08-06 20:13:08,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538152285] [2021-08-06 20:13:08,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-08-06 20:13:08,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:13:08,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-08-06 20:13:08,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=2054, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 20:13:08,693 INFO L87 Difference]: Start difference. First operand 2715 states and 4365 transitions. Second operand has 48 states, 48 states have (on average 1.8333333333333333) internal successors, (88), 48 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:13:15,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:13:15,439 INFO L93 Difference]: Finished difference Result 7857 states and 11943 transitions. [2021-08-06 20:13:15,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-08-06 20:13:15,440 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.8333333333333333) internal successors, (88), 48 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-06 20:13:15,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:13:15,449 INFO L225 Difference]: With dead ends: 7857 [2021-08-06 20:13:15,449 INFO L226 Difference]: Without dead ends: 7766 [2021-08-06 20:13:15,450 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6150 ImplicationChecksByTransitivity, 5787.8ms TimeCoverageRelationStatistics Valid=2308, Invalid=17998, Unknown=0, NotChecked=0, Total=20306 [2021-08-06 20:13:15,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7766 states. [2021-08-06 20:13:15,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7766 to 2787. [2021-08-06 20:13:15,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2787 states, 2786 states have (on average 1.6083991385498924) internal successors, (4481), 2786 states have internal predecessors, (4481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:13:15,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2787 states to 2787 states and 4481 transitions. [2021-08-06 20:13:15,491 INFO L78 Accepts]: Start accepts. Automaton has 2787 states and 4481 transitions. Word has length 49 [2021-08-06 20:13:15,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:13:15,491 INFO L470 AbstractCegarLoop]: Abstraction has 2787 states and 4481 transitions. [2021-08-06 20:13:15,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.8333333333333333) internal successors, (88), 48 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:13:15,492 INFO L276 IsEmpty]: Start isEmpty. Operand 2787 states and 4481 transitions. [2021-08-06 20:13:15,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-06 20:13:15,494 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:13:15,494 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:13:15,518 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-08-06 20:13:15,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:13:15,695 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:13:15,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:13:15,695 INFO L82 PathProgramCache]: Analyzing trace with hash 921532322, now seen corresponding path program 49 times [2021-08-06 20:13:15,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:13:15,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080141185] [2021-08-06 20:13:15,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:13:15,695 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:13:15,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:13:16,226 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 57.5 percent of original size [2021-08-06 20:13:16,229 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 57.5 percent of original size [2021-08-06 20:13:16,262 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:13:16,264 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:13:16,408 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:13:16,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:13:16,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080141185] [2021-08-06 20:13:16,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080141185] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:13:16,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467875792] [2021-08-06 20:13:16,409 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:13:16,410 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:13:16,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:13:16,410 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:13:16,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-06 20:13:19,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:13:19,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-06 20:13:19,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:13:21,128 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-06 20:13:21,128 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 [2021-08-06 20:13:21,283 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:13:21,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467875792] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:13:21,284 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:13:21,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 48 [2021-08-06 20:13:21,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989865567] [2021-08-06 20:13:21,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-08-06 20:13:21,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:13:21,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-08-06 20:13:21,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=2061, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 20:13:21,285 INFO L87 Difference]: Start difference. First operand 2787 states and 4481 transitions. Second operand has 48 states, 48 states have (on average 1.8333333333333333) internal successors, (88), 48 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:13:26,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:13:26,090 INFO L93 Difference]: Finished difference Result 6373 states and 9690 transitions. [2021-08-06 20:13:26,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-08-06 20:13:26,090 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.8333333333333333) internal successors, (88), 48 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-06 20:13:26,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:13:26,098 INFO L225 Difference]: With dead ends: 6373 [2021-08-06 20:13:26,099 INFO L226 Difference]: Without dead ends: 6306 [2021-08-06 20:13:26,099 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4445 ImplicationChecksByTransitivity, 4713.4ms TimeCoverageRelationStatistics Valid=1650, Invalid=13850, Unknown=0, NotChecked=0, Total=15500 [2021-08-06 20:13:26,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6306 states. [2021-08-06 20:13:26,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6306 to 2829. [2021-08-06 20:13:26,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2829 states, 2828 states have (on average 1.6078500707213579) internal successors, (4547), 2828 states have internal predecessors, (4547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:13:26,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2829 states to 2829 states and 4547 transitions. [2021-08-06 20:13:26,145 INFO L78 Accepts]: Start accepts. Automaton has 2829 states and 4547 transitions. Word has length 49 [2021-08-06 20:13:26,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:13:26,145 INFO L470 AbstractCegarLoop]: Abstraction has 2829 states and 4547 transitions. [2021-08-06 20:13:26,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.8333333333333333) internal successors, (88), 48 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:13:26,146 INFO L276 IsEmpty]: Start isEmpty. Operand 2829 states and 4547 transitions. [2021-08-06 20:13:26,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-06 20:13:26,149 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:13:26,149 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:13:26,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-08-06 20:13:26,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-08-06 20:13:26,368 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:13:26,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:13:26,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1113802122, now seen corresponding path program 50 times [2021-08-06 20:13:26,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:13:26,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478649474] [2021-08-06 20:13:26,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:13:26,369 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:13:26,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:13:27,137 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:13:27,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:13:27,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478649474] [2021-08-06 20:13:27,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478649474] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:13:27,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008575609] [2021-08-06 20:13:27,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:13:27,137 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:13:27,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:13:27,138 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:13:27,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-06 20:13:30,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:13:30,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:13:30,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-06 20:13:30,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:13:32,451 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-06 20:13:32,451 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 [2021-08-06 20:13:32,587 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:13:32,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008575609] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:13:32,588 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:13:32,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 47 [2021-08-06 20:13:32,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812464243] [2021-08-06 20:13:32,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-08-06 20:13:32,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:13:32,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-08-06 20:13:32,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1962, Unknown=0, NotChecked=0, Total=2162 [2021-08-06 20:13:32,589 INFO L87 Difference]: Start difference. First operand 2829 states and 4547 transitions. Second operand has 47 states, 47 states have (on average 1.872340425531915) internal successors, (88), 47 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:13:50,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:13:50,908 INFO L93 Difference]: Finished difference Result 11909 states and 18210 transitions. [2021-08-06 20:13:50,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 226 states. [2021-08-06 20:13:50,908 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.872340425531915) internal successors, (88), 47 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-06 20:13:50,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:13:50,921 INFO L225 Difference]: With dead ends: 11909 [2021-08-06 20:13:50,921 INFO L226 Difference]: Without dead ends: 10956 [2021-08-06 20:13:50,925 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28534 ImplicationChecksByTransitivity, 14306.5ms TimeCoverageRelationStatistics Valid=9176, Invalid=62916, Unknown=0, NotChecked=0, Total=72092 [2021-08-06 20:13:50,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10956 states. [2021-08-06 20:13:50,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10956 to 2777. [2021-08-06 20:13:50,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2777 states, 2776 states have (on average 1.6041066282420748) internal successors, (4453), 2776 states have internal predecessors, (4453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:13:50,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2777 states to 2777 states and 4453 transitions. [2021-08-06 20:13:50,992 INFO L78 Accepts]: Start accepts. Automaton has 2777 states and 4453 transitions. Word has length 49 [2021-08-06 20:13:50,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:13:50,992 INFO L470 AbstractCegarLoop]: Abstraction has 2777 states and 4453 transitions. [2021-08-06 20:13:50,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.872340425531915) internal successors, (88), 47 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:13:50,993 INFO L276 IsEmpty]: Start isEmpty. Operand 2777 states and 4453 transitions. [2021-08-06 20:13:50,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-06 20:13:50,996 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:13:50,996 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:13:51,033 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-08-06 20:13:51,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-08-06 20:13:51,218 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:13:51,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:13:51,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1100849746, now seen corresponding path program 51 times [2021-08-06 20:13:51,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:13:51,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243758674] [2021-08-06 20:13:51,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:13:51,219 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:13:51,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:13:52,088 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:13:52,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:13:52,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243758674] [2021-08-06 20:13:52,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243758674] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:13:52,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881892209] [2021-08-06 20:13:52,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:13:52,089 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:13:52,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:13:52,090 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:13:52,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-06 20:13:55,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 20:13:55,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:13:55,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-06 20:13:55,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:13:57,397 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-06 20:13:57,397 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 [2021-08-06 20:13:57,612 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:13:57,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881892209] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:13:57,612 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:13:57,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 47 [2021-08-06 20:13:57,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322915870] [2021-08-06 20:13:57,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-08-06 20:13:57,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:13:57,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-08-06 20:13:57,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1963, Unknown=0, NotChecked=0, Total=2162 [2021-08-06 20:13:57,614 INFO L87 Difference]: Start difference. First operand 2777 states and 4453 transitions. Second operand has 47 states, 47 states have (on average 1.872340425531915) internal successors, (88), 47 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:14:05,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:14:05,634 INFO L93 Difference]: Finished difference Result 8501 states and 12769 transitions. [2021-08-06 20:14:05,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2021-08-06 20:14:05,634 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.872340425531915) internal successors, (88), 47 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-06 20:14:05,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:14:05,646 INFO L225 Difference]: With dead ends: 8501 [2021-08-06 20:14:05,646 INFO L226 Difference]: Without dead ends: 8386 [2021-08-06 20:14:05,648 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11054 ImplicationChecksByTransitivity, 7077.8ms TimeCoverageRelationStatistics Valid=3911, Invalid=27595, Unknown=0, NotChecked=0, Total=31506 [2021-08-06 20:14:05,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8386 states. [2021-08-06 20:14:05,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8386 to 2847. [2021-08-06 20:14:05,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2847 states, 2846 states have (on average 1.6061138439915672) internal successors, (4571), 2846 states have internal predecessors, (4571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:14:05,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2847 states to 2847 states and 4571 transitions. [2021-08-06 20:14:05,723 INFO L78 Accepts]: Start accepts. Automaton has 2847 states and 4571 transitions. Word has length 49 [2021-08-06 20:14:05,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:14:05,723 INFO L470 AbstractCegarLoop]: Abstraction has 2847 states and 4571 transitions. [2021-08-06 20:14:05,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.872340425531915) internal successors, (88), 47 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:14:05,723 INFO L276 IsEmpty]: Start isEmpty. Operand 2847 states and 4571 transitions. [2021-08-06 20:14:05,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-06 20:14:05,727 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:14:05,727 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:14:05,762 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-08-06 20:14:05,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:14:05,941 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:14:05,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:14:05,942 INFO L82 PathProgramCache]: Analyzing trace with hash 2019932810, now seen corresponding path program 52 times [2021-08-06 20:14:05,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:14:05,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928657605] [2021-08-06 20:14:05,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:14:05,942 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:14:05,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:14:06,647 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:14:06,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:14:06,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928657605] [2021-08-06 20:14:06,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928657605] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:14:06,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802886477] [2021-08-06 20:14:06,648 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:14:06,648 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:14:06,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:14:06,650 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:14:06,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-06 20:14:10,037 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:14:10,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:14:10,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-06 20:14:10,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:14:11,985 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-06 20:14:11,985 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 [2021-08-06 20:14:12,147 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:14:12,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802886477] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:14:12,147 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:14:12,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 47 [2021-08-06 20:14:12,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573998947] [2021-08-06 20:14:12,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-08-06 20:14:12,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:14:12,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-08-06 20:14:12,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1966, Unknown=0, NotChecked=0, Total=2162 [2021-08-06 20:14:12,149 INFO L87 Difference]: Start difference. First operand 2847 states and 4571 transitions. Second operand has 47 states, 47 states have (on average 1.872340425531915) internal successors, (88), 47 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:14:19,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:14:19,733 INFO L93 Difference]: Finished difference Result 8521 states and 12870 transitions. [2021-08-06 20:14:19,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-08-06 20:14:19,733 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.872340425531915) internal successors, (88), 47 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-06 20:14:19,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:14:19,743 INFO L225 Difference]: With dead ends: 8521 [2021-08-06 20:14:19,743 INFO L226 Difference]: Without dead ends: 8430 [2021-08-06 20:14:19,744 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8920 ImplicationChecksByTransitivity, 6384.9ms TimeCoverageRelationStatistics Valid=3119, Invalid=23613, Unknown=0, NotChecked=0, Total=26732 [2021-08-06 20:14:19,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8430 states. [2021-08-06 20:14:19,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8430 to 2917. [2021-08-06 20:14:19,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2917 states, 2916 states have (on average 1.6073388203017833) internal successors, (4687), 2916 states have internal predecessors, (4687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:14:19,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2917 states to 2917 states and 4687 transitions. [2021-08-06 20:14:19,793 INFO L78 Accepts]: Start accepts. Automaton has 2917 states and 4687 transitions. Word has length 49 [2021-08-06 20:14:19,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:14:19,793 INFO L470 AbstractCegarLoop]: Abstraction has 2917 states and 4687 transitions. [2021-08-06 20:14:19,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.872340425531915) internal successors, (88), 47 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:14:19,793 INFO L276 IsEmpty]: Start isEmpty. Operand 2917 states and 4687 transitions. [2021-08-06 20:14:19,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-06 20:14:19,796 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:14:19,796 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:14:19,824 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-08-06 20:14:19,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-08-06 20:14:19,997 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:14:19,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:14:19,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1766372014, now seen corresponding path program 53 times [2021-08-06 20:14:19,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:14:19,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909387554] [2021-08-06 20:14:19,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:14:19,998 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:14:20,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:14:20,630 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 57.5 percent of original size [2021-08-06 20:14:20,632 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 57.5 percent of original size [2021-08-06 20:14:20,667 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:14:20,669 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:14:20,805 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:14:20,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:14:20,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909387554] [2021-08-06 20:14:20,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909387554] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:14:20,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329700365] [2021-08-06 20:14:20,805 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:14:20,806 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:14:20,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:14:20,806 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:14:20,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-06 20:14:24,274 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 20:14:24,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:14:24,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-06 20:14:24,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:14:25,525 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 95.7 percent of original size [2021-08-06 20:14:25,528 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 95.7 percent of original size [2021-08-06 20:14:25,968 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-06 20:14:25,969 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 [2021-08-06 20:14:26,125 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:14:26,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329700365] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:14:26,125 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:14:26,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 47 [2021-08-06 20:14:26,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570810246] [2021-08-06 20:14:26,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-08-06 20:14:26,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:14:26,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-08-06 20:14:26,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1970, Unknown=0, NotChecked=0, Total=2162 [2021-08-06 20:14:26,126 INFO L87 Difference]: Start difference. First operand 2917 states and 4687 transitions. Second operand has 47 states, 47 states have (on average 1.872340425531915) internal successors, (88), 47 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:14:32,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:14:32,573 INFO L93 Difference]: Finished difference Result 6857 states and 10388 transitions. [2021-08-06 20:14:32,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-08-06 20:14:32,574 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.872340425531915) internal successors, (88), 47 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-06 20:14:32,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:14:32,584 INFO L225 Difference]: With dead ends: 6857 [2021-08-06 20:14:32,585 INFO L226 Difference]: Without dead ends: 6790 [2021-08-06 20:14:32,587 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7027 ImplicationChecksByTransitivity, 5956.9ms TimeCoverageRelationStatistics Valid=2265, Invalid=19491, Unknown=0, NotChecked=0, Total=21756 [2021-08-06 20:14:32,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6790 states. [2021-08-06 20:14:32,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6790 to 2951. [2021-08-06 20:14:32,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2951 states, 2950 states have (on average 1.6084745762711865) internal successors, (4745), 2950 states have internal predecessors, (4745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:14:32,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2951 states to 2951 states and 4745 transitions. [2021-08-06 20:14:32,643 INFO L78 Accepts]: Start accepts. Automaton has 2951 states and 4745 transitions. Word has length 49 [2021-08-06 20:14:32,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:14:32,643 INFO L470 AbstractCegarLoop]: Abstraction has 2951 states and 4745 transitions. [2021-08-06 20:14:32,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.872340425531915) internal successors, (88), 47 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:14:32,643 INFO L276 IsEmpty]: Start isEmpty. Operand 2951 states and 4745 transitions. [2021-08-06 20:14:32,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-06 20:14:32,647 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:14:32,647 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:14:32,681 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-08-06 20:14:32,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-08-06 20:14:32,861 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:14:32,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:14:32,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1350461852, now seen corresponding path program 54 times [2021-08-06 20:14:32,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:14:32,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410187806] [2021-08-06 20:14:32,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:14:32,861 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:14:32,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:14:33,697 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:14:33,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:14:33,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410187806] [2021-08-06 20:14:33,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410187806] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:14:33,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244116921] [2021-08-06 20:14:33,697 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:14:33,697 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:14:33,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:14:33,698 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:14:33,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-06 20:14:37,440 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 20:14:37,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:14:37,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-06 20:14:37,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:14:39,310 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-06 20:14:39,311 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 [2021-08-06 20:14:39,468 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:14:39,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244116921] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:14:39,468 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:14:39,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26] total 46 [2021-08-06 20:14:39,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988070148] [2021-08-06 20:14:39,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-08-06 20:14:39,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:14:39,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-08-06 20:14:39,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1882, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 20:14:39,469 INFO L87 Difference]: Start difference. First operand 2951 states and 4745 transitions. Second operand has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 46 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:14:57,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:14:57,810 INFO L93 Difference]: Finished difference Result 11248 states and 17311 transitions. [2021-08-06 20:14:57,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 219 states. [2021-08-06 20:14:57,815 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 46 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-06 20:14:57,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:14:57,829 INFO L225 Difference]: With dead ends: 11248 [2021-08-06 20:14:57,830 INFO L226 Difference]: Without dead ends: 10396 [2021-08-06 20:14:57,833 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26988 ImplicationChecksByTransitivity, 14256.2ms TimeCoverageRelationStatistics Valid=8413, Invalid=59447, Unknown=0, NotChecked=0, Total=67860 [2021-08-06 20:14:57,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10396 states. [2021-08-06 20:14:57,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10396 to 3125. [2021-08-06 20:14:57,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3125 states, 3124 states have (on average 1.6033930857874519) internal successors, (5009), 3124 states have internal predecessors, (5009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:14:57,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3125 states to 3125 states and 5009 transitions. [2021-08-06 20:14:57,903 INFO L78 Accepts]: Start accepts. Automaton has 3125 states and 5009 transitions. Word has length 49 [2021-08-06 20:14:57,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:14:57,903 INFO L470 AbstractCegarLoop]: Abstraction has 3125 states and 5009 transitions. [2021-08-06 20:14:57,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 46 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:14:57,904 INFO L276 IsEmpty]: Start isEmpty. Operand 3125 states and 5009 transitions. [2021-08-06 20:14:57,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-06 20:14:57,907 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:14:57,907 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:14:57,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-08-06 20:14:58,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:14:58,133 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:14:58,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:14:58,133 INFO L82 PathProgramCache]: Analyzing trace with hash -431378788, now seen corresponding path program 55 times [2021-08-06 20:14:58,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:14:58,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597233392] [2021-08-06 20:14:58,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:14:58,133 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:14:58,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:14:58,982 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:14:58,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:14:58,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597233392] [2021-08-06 20:14:58,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597233392] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:14:58,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290010560] [2021-08-06 20:14:58,982 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:14:58,983 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:14:58,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:14:58,983 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:14:59,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-06 20:15:02,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:15:02,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-06 20:15:02,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:15:04,327 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-06 20:15:04,327 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 [2021-08-06 20:15:04,466 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:04,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290010560] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:04,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:15:04,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26] total 46 [2021-08-06 20:15:04,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878208533] [2021-08-06 20:15:04,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-08-06 20:15:04,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:15:04,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-08-06 20:15:04,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1883, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 20:15:04,467 INFO L87 Difference]: Start difference. First operand 3125 states and 5009 transitions. Second operand has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 46 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:12,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:15:12,170 INFO L93 Difference]: Finished difference Result 8959 states and 13543 transitions. [2021-08-06 20:15:12,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2021-08-06 20:15:12,170 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 46 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-06 20:15:12,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:15:12,181 INFO L225 Difference]: With dead ends: 8959 [2021-08-06 20:15:12,181 INFO L226 Difference]: Without dead ends: 8868 [2021-08-06 20:15:12,182 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11386 ImplicationChecksByTransitivity, 6789.8ms TimeCoverageRelationStatistics Valid=3689, Invalid=28531, Unknown=0, NotChecked=0, Total=32220 [2021-08-06 20:15:12,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8868 states. [2021-08-06 20:15:12,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8868 to 3371. [2021-08-06 20:15:12,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3371 states, 3370 states have (on average 1.6062314540059348) internal successors, (5413), 3370 states have internal predecessors, (5413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:12,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3371 states to 3371 states and 5413 transitions. [2021-08-06 20:15:12,237 INFO L78 Accepts]: Start accepts. Automaton has 3371 states and 5413 transitions. Word has length 49 [2021-08-06 20:15:12,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:15:12,238 INFO L470 AbstractCegarLoop]: Abstraction has 3371 states and 5413 transitions. [2021-08-06 20:15:12,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 46 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:12,238 INFO L276 IsEmpty]: Start isEmpty. Operand 3371 states and 5413 transitions. [2021-08-06 20:15:12,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-06 20:15:12,241 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:15:12,241 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:15:12,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-08-06 20:15:12,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:15:12,442 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:15:12,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:15:12,442 INFO L82 PathProgramCache]: Analyzing trace with hash 77283684, now seen corresponding path program 56 times [2021-08-06 20:15:12,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:15:12,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489956119] [2021-08-06 20:15:12,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:15:12,443 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:15:12,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:15:12,910 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 57.5 percent of original size [2021-08-06 20:15:12,912 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 57.5 percent of original size [2021-08-06 20:15:12,938 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:15:12,940 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:15:13,035 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:15:13,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:15:13,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489956119] [2021-08-06 20:15:13,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489956119] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:13,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659189126] [2021-08-06 20:15:13,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:15:13,036 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:15:13,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:15:13,040 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:15:13,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-06 20:15:16,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:15:16,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:15:16,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-06 20:15:16,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:15:18,196 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-06 20:15:18,196 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 [2021-08-06 20:15:18,323 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:18,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659189126] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:18,323 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:15:18,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26] total 46 [2021-08-06 20:15:18,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4961317] [2021-08-06 20:15:18,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-08-06 20:15:18,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:15:18,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-08-06 20:15:18,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1884, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 20:15:18,324 INFO L87 Difference]: Start difference. First operand 3371 states and 5413 transitions. Second operand has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 46 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:24,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:15:24,513 INFO L93 Difference]: Finished difference Result 7243 states and 11003 transitions. [2021-08-06 20:15:24,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-08-06 20:15:24,513 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 46 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-06 20:15:24,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:15:24,524 INFO L225 Difference]: With dead ends: 7243 [2021-08-06 20:15:24,524 INFO L226 Difference]: Without dead ends: 7176 [2021-08-06 20:15:24,526 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8835 ImplicationChecksByTransitivity, 5565.1ms TimeCoverageRelationStatistics Valid=2632, Invalid=23128, Unknown=0, NotChecked=0, Total=25760 [2021-08-06 20:15:24,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7176 states. [2021-08-06 20:15:24,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7176 to 3549. [2021-08-06 20:15:24,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3549 states, 3548 states have (on average 1.6104847801578355) internal successors, (5714), 3548 states have internal predecessors, (5714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:24,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3549 states to 3549 states and 5714 transitions. [2021-08-06 20:15:24,581 INFO L78 Accepts]: Start accepts. Automaton has 3549 states and 5714 transitions. Word has length 49 [2021-08-06 20:15:24,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:15:24,581 INFO L470 AbstractCegarLoop]: Abstraction has 3549 states and 5714 transitions. [2021-08-06 20:15:24,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 46 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:24,581 INFO L276 IsEmpty]: Start isEmpty. Operand 3549 states and 5714 transitions. [2021-08-06 20:15:24,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-06 20:15:24,584 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:15:24,585 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:15:24,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-08-06 20:15:24,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:15:24,807 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:15:24,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:15:24,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1523483594, now seen corresponding path program 57 times [2021-08-06 20:15:24,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:15:24,807 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888753176] [2021-08-06 20:15:24,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:15:24,807 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:15:24,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:15:25,363 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:15:25,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:15:25,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888753176] [2021-08-06 20:15:25,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888753176] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:25,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249574969] [2021-08-06 20:15:25,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:15:25,364 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:15:25,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:15:25,364 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:15:25,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-06 20:15:29,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 20:15:29,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:15:29,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-06 20:15:29,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:15:31,393 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-06 20:15:31,393 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 [2021-08-06 20:15:31,518 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:31,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249574969] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:31,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:15:31,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 26] total 45 [2021-08-06 20:15:31,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933253780] [2021-08-06 20:15:31,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-08-06 20:15:31,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:15:31,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-08-06 20:15:31,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1801, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 20:15:31,519 INFO L87 Difference]: Start difference. First operand 3549 states and 5714 transitions. Second operand has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:47,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:15:47,765 INFO L93 Difference]: Finished difference Result 10002 states and 15379 transitions. [2021-08-06 20:15:47,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2021-08-06 20:15:47,765 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-06 20:15:47,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:15:47,775 INFO L225 Difference]: With dead ends: 10002 [2021-08-06 20:15:47,775 INFO L226 Difference]: Without dead ends: 9358 [2021-08-06 20:15:47,777 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23603 ImplicationChecksByTransitivity, 12608.1ms TimeCoverageRelationStatistics Valid=6293, Invalid=53487, Unknown=0, NotChecked=0, Total=59780 [2021-08-06 20:15:47,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9358 states. [2021-08-06 20:15:47,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9358 to 3747. [2021-08-06 20:15:47,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3747 states, 3746 states have (on average 1.6073144687666845) internal successors, (6021), 3746 states have internal predecessors, (6021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:47,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3747 states to 3747 states and 6021 transitions. [2021-08-06 20:15:47,836 INFO L78 Accepts]: Start accepts. Automaton has 3747 states and 6021 transitions. Word has length 49 [2021-08-06 20:15:47,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:15:47,836 INFO L470 AbstractCegarLoop]: Abstraction has 3747 states and 6021 transitions. [2021-08-06 20:15:47,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:47,837 INFO L276 IsEmpty]: Start isEmpty. Operand 3747 states and 6021 transitions. [2021-08-06 20:15:47,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-06 20:15:47,840 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:15:47,840 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:15:47,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-08-06 20:15:48,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-06 20:15:48,042 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:15:48,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:15:48,042 INFO L82 PathProgramCache]: Analyzing trace with hash 2032146066, now seen corresponding path program 58 times [2021-08-06 20:15:48,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:15:48,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673870357] [2021-08-06 20:15:48,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:15:48,043 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:15:48,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:15:48,600 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 57.5 percent of original size [2021-08-06 20:15:48,602 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 57.5 percent of original size [2021-08-06 20:15:48,626 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:15:48,628 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:15:48,716 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:15:48,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:15:48,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673870357] [2021-08-06 20:15:48,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673870357] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:48,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876527972] [2021-08-06 20:15:48,717 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:15:48,717 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:15:48,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:15:48,717 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:15:48,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-06 20:15:52,516 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:15:52,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:15:52,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-06 20:15:52,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:15:54,097 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-06 20:15:54,097 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 [2021-08-06 20:15:54,231 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:54,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876527972] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:54,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:15:54,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 26] total 45 [2021-08-06 20:15:54,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963397522] [2021-08-06 20:15:54,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-08-06 20:15:54,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:15:54,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-08-06 20:15:54,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1800, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 20:15:54,232 INFO L87 Difference]: Start difference. First operand 3747 states and 6021 transitions. Second operand has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:01,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:16:01,032 INFO L93 Difference]: Finished difference Result 7465 states and 11341 transitions. [2021-08-06 20:16:01,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2021-08-06 20:16:01,032 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-06 20:16:01,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:16:01,040 INFO L225 Difference]: With dead ends: 7465 [2021-08-06 20:16:01,040 INFO L226 Difference]: Without dead ends: 7398 [2021-08-06 20:16:01,042 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11614 ImplicationChecksByTransitivity, 5898.6ms TimeCoverageRelationStatistics Valid=3084, Invalid=28422, Unknown=0, NotChecked=0, Total=31506 [2021-08-06 20:16:01,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7398 states. [2021-08-06 20:16:01,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7398 to 4083. [2021-08-06 20:16:01,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4083 states, 4082 states have (on average 1.609750122488976) internal successors, (6571), 4082 states have internal predecessors, (6571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:01,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4083 states to 4083 states and 6571 transitions. [2021-08-06 20:16:01,093 INFO L78 Accepts]: Start accepts. Automaton has 4083 states and 6571 transitions. Word has length 49 [2021-08-06 20:16:01,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:16:01,093 INFO L470 AbstractCegarLoop]: Abstraction has 4083 states and 6571 transitions. [2021-08-06 20:16:01,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:01,093 INFO L276 IsEmpty]: Start isEmpty. Operand 4083 states and 6571 transitions. [2021-08-06 20:16:01,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-06 20:16:01,097 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:16:01,097 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:16:01,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-08-06 20:16:01,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-08-06 20:16:01,298 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:16:01,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:16:01,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1305018404, now seen corresponding path program 59 times [2021-08-06 20:16:01,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:16:01,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546148226] [2021-08-06 20:16:01,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:16:01,298 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:16:01,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:16:01,793 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 58.5 percent of original size [2021-08-06 20:16:01,796 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 58.5 percent of original size [2021-08-06 20:16:01,831 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:16:01,833 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:16:01,847 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:16:01,850 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:16:01,947 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:16:01,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:16:01,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546148226] [2021-08-06 20:16:01,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546148226] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:01,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021677168] [2021-08-06 20:16:01,947 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:16:01,947 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:01,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:16:01,948 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:16:01,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-06 20:16:05,679 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 20:16:05,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:16:05,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-06 20:16:05,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:16:07,549 INFO L354 Elim1Store]: treesize reduction 489, result has 3.2 percent of original size [2021-08-06 20:16:07,549 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 70 treesize of output 49 [2021-08-06 20:16:07,847 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:16:07,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021677168] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:07,848 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:16:07,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 26] total 44 [2021-08-06 20:16:07,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384786486] [2021-08-06 20:16:07,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-06 20:16:07,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:16:07,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-06 20:16:07,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1721, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 20:16:07,849 INFO L87 Difference]: Start difference. First operand 4083 states and 6571 transitions. Second operand has 44 states, 44 states have (on average 2.0) internal successors, (88), 44 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:20,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:16:20,383 INFO L93 Difference]: Finished difference Result 8342 states and 12762 transitions. [2021-08-06 20:16:20,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2021-08-06 20:16:20,384 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 44 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-06 20:16:20,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:16:20,394 INFO L225 Difference]: With dead ends: 8342 [2021-08-06 20:16:20,395 INFO L226 Difference]: Without dead ends: 7933 [2021-08-06 20:16:20,397 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17495 ImplicationChecksByTransitivity, 9407.3ms TimeCoverageRelationStatistics Valid=4115, Invalid=40617, Unknown=0, NotChecked=0, Total=44732 [2021-08-06 20:16:20,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7933 states. [2021-08-06 20:16:20,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7933 to 4117. [2021-08-06 20:16:20,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4117 states, 4116 states have (on average 1.6093294460641399) internal successors, (6624), 4116 states have internal predecessors, (6624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:20,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4117 states to 4117 states and 6624 transitions. [2021-08-06 20:16:20,478 INFO L78 Accepts]: Start accepts. Automaton has 4117 states and 6624 transitions. Word has length 49 [2021-08-06 20:16:20,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:16:20,478 INFO L470 AbstractCegarLoop]: Abstraction has 4117 states and 6624 transitions. [2021-08-06 20:16:20,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 44 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:20,479 INFO L276 IsEmpty]: Start isEmpty. Operand 4117 states and 6624 transitions. [2021-08-06 20:16:20,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-06 20:16:20,485 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:16:20,485 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:16:20,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-08-06 20:16:20,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-08-06 20:16:20,717 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:16:20,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:16:20,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1079030434, now seen corresponding path program 60 times [2021-08-06 20:16:20,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:16:20,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229761754] [2021-08-06 20:16:20,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:16:20,717 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:16:20,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:16:21,381 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 57.5 percent of original size [2021-08-06 20:16:21,384 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 57.5 percent of original size [2021-08-06 20:16:21,412 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:16:21,415 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:16:21,519 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:16:21,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:16:21,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229761754] [2021-08-06 20:16:21,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229761754] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:21,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496009839] [2021-08-06 20:16:21,519 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:16:21,520 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:21,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:16:21,520 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:16:21,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-06 20:16:26,022 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 20:16:26,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:16:26,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-06 20:16:26,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:16:28,070 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-06 20:16:28,071 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 [2021-08-06 20:16:28,224 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:16:28,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496009839] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:28,224 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:16:28,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 26] total 45 [2021-08-06 20:16:28,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246944813] [2021-08-06 20:16:28,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-08-06 20:16:28,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:16:28,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-08-06 20:16:28,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1799, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 20:16:28,226 INFO L87 Difference]: Start difference. First operand 4117 states and 6624 transitions. Second operand has 45 states, 45 states have (on average 1.9333333333333333) internal successors, (87), 45 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:33,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:16:33,469 INFO L93 Difference]: Finished difference Result 8329 states and 12764 transitions. [2021-08-06 20:16:33,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-08-06 20:16:33,469 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9333333333333333) internal successors, (87), 45 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-06 20:16:33,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:16:33,479 INFO L225 Difference]: With dead ends: 8329 [2021-08-06 20:16:33,479 INFO L226 Difference]: Without dead ends: 8262 [2021-08-06 20:16:33,480 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5444 ImplicationChecksByTransitivity, 4859.1ms TimeCoverageRelationStatistics Valid=1773, Invalid=14997, Unknown=0, NotChecked=0, Total=16770 [2021-08-06 20:16:33,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8262 states. [2021-08-06 20:16:33,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8262 to 4153. [2021-08-06 20:16:33,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4153 states, 4152 states have (on average 1.609344894026975) internal successors, (6682), 4152 states have internal predecessors, (6682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:33,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4153 states to 4153 states and 6682 transitions. [2021-08-06 20:16:33,532 INFO L78 Accepts]: Start accepts. Automaton has 4153 states and 6682 transitions. Word has length 49 [2021-08-06 20:16:33,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:16:33,533 INFO L470 AbstractCegarLoop]: Abstraction has 4153 states and 6682 transitions. [2021-08-06 20:16:33,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9333333333333333) internal successors, (87), 45 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:33,533 INFO L276 IsEmpty]: Start isEmpty. Operand 4153 states and 6682 transitions. [2021-08-06 20:16:33,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-06 20:16:33,537 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:16:33,537 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:16:33,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-08-06 20:16:33,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:33,737 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:16:33,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:16:33,738 INFO L82 PathProgramCache]: Analyzing trace with hash 858155218, now seen corresponding path program 61 times [2021-08-06 20:16:33,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:16:33,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103098074] [2021-08-06 20:16:33,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:16:33,738 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:16:33,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:16:34,158 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 57.5 percent of original size [2021-08-06 20:16:34,160 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 57.5 percent of original size [2021-08-06 20:16:34,185 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:16:34,186 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:16:34,275 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:16:34,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:16:34,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103098074] [2021-08-06 20:16:34,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103098074] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:34,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754329916] [2021-08-06 20:16:34,275 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:16:34,275 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:34,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:16:34,276 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:16:34,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-06 20:16:38,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:16:38,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-06 20:16:38,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:16:39,844 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-06 20:16:39,845 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 [2021-08-06 20:16:39,964 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:16:39,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754329916] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:39,965 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:16:39,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 26] total 44 [2021-08-06 20:16:39,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478148169] [2021-08-06 20:16:39,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-06 20:16:39,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:16:39,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-06 20:16:39,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1717, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 20:16:39,966 INFO L87 Difference]: Start difference. First operand 4153 states and 6682 transitions. Second operand has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:46,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:16:46,079 INFO L93 Difference]: Finished difference Result 8894 states and 13523 transitions. [2021-08-06 20:16:46,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-08-06 20:16:46,081 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-06 20:16:46,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:16:46,093 INFO L225 Difference]: With dead ends: 8894 [2021-08-06 20:16:46,093 INFO L226 Difference]: Without dead ends: 8827 [2021-08-06 20:16:46,095 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8280 ImplicationChecksByTransitivity, 4939.5ms TimeCoverageRelationStatistics Valid=2411, Invalid=21151, Unknown=0, NotChecked=0, Total=23562 [2021-08-06 20:16:46,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8827 states. [2021-08-06 20:16:46,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8827 to 4333. [2021-08-06 20:16:46,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4333 states, 4332 states have (on average 1.6124192059095106) internal successors, (6985), 4332 states have internal predecessors, (6985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:46,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4333 states to 4333 states and 6985 transitions. [2021-08-06 20:16:46,189 INFO L78 Accepts]: Start accepts. Automaton has 4333 states and 6985 transitions. Word has length 49 [2021-08-06 20:16:46,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:16:46,190 INFO L470 AbstractCegarLoop]: Abstraction has 4333 states and 6985 transitions. [2021-08-06 20:16:46,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:46,190 INFO L276 IsEmpty]: Start isEmpty. Operand 4333 states and 6985 transitions. [2021-08-06 20:16:46,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-06 20:16:46,209 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:16:46,209 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:16:46,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-08-06 20:16:46,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:46,445 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:16:46,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:16:46,445 INFO L82 PathProgramCache]: Analyzing trace with hash 131027556, now seen corresponding path program 62 times [2021-08-06 20:16:46,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:16:46,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997730931] [2021-08-06 20:16:46,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:16:46,445 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:16:46,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:16:46,961 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 58.5 percent of original size [2021-08-06 20:16:46,964 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 58.5 percent of original size [2021-08-06 20:16:46,995 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:16:46,998 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:16:47,010 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:16:47,012 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:16:47,115 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:16:47,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:16:47,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997730931] [2021-08-06 20:16:47,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997730931] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:47,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268040103] [2021-08-06 20:16:47,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:16:47,115 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:47,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:16:47,117 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:16:47,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-06 20:16:51,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:16:51,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:16:51,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-06 20:16:51,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:16:53,851 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-06 20:16:53,851 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 [2021-08-06 20:16:53,995 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:16:53,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268040103] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:53,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:16:53,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 26] total 43 [2021-08-06 20:16:53,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781854909] [2021-08-06 20:16:53,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-06 20:16:53,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:16:53,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-06 20:16:53,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1636, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 20:16:53,996 INFO L87 Difference]: Start difference. First operand 4333 states and 6985 transitions. Second operand has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 43 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:17:04,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:17:04,173 INFO L93 Difference]: Finished difference Result 10596 states and 16290 transitions. [2021-08-06 20:17:04,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2021-08-06 20:17:04,173 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 43 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-06 20:17:04,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:17:04,186 INFO L225 Difference]: With dead ends: 10596 [2021-08-06 20:17:04,187 INFO L226 Difference]: Without dead ends: 10153 [2021-08-06 20:17:04,189 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13699 ImplicationChecksByTransitivity, 8000.6ms TimeCoverageRelationStatistics Valid=3564, Invalid=31968, Unknown=0, NotChecked=0, Total=35532 [2021-08-06 20:17:04,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10153 states. [2021-08-06 20:17:04,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10153 to 4607. [2021-08-06 20:17:04,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4607 states, 4606 states have (on average 1.615501519756839) internal successors, (7441), 4606 states have internal predecessors, (7441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:17:04,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4607 states to 4607 states and 7441 transitions. [2021-08-06 20:17:04,267 INFO L78 Accepts]: Start accepts. Automaton has 4607 states and 7441 transitions. Word has length 49 [2021-08-06 20:17:04,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:17:04,268 INFO L470 AbstractCegarLoop]: Abstraction has 4607 states and 7441 transitions. [2021-08-06 20:17:04,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 43 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:17:04,268 INFO L276 IsEmpty]: Start isEmpty. Operand 4607 states and 7441 transitions. [2021-08-06 20:17:04,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-06 20:17:04,273 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:17:04,274 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:17:04,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-08-06 20:17:04,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-08-06 20:17:04,497 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:17:04,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:17:04,497 INFO L82 PathProgramCache]: Analyzing trace with hash -866092198, now seen corresponding path program 63 times [2021-08-06 20:17:04,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:17:04,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575125175] [2021-08-06 20:17:04,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:17:04,497 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:17:04,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:17:05,102 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 57.5 percent of original size [2021-08-06 20:17:05,105 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 57.5 percent of original size [2021-08-06 20:17:05,136 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:17:05,138 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:17:05,256 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:17:05,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:17:05,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575125175] [2021-08-06 20:17:05,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575125175] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:17:05,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076670164] [2021-08-06 20:17:05,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:17:05,257 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:17:05,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:17:05,258 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:17:05,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-06 20:17:10,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 20:17:10,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:17:10,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-06 20:17:10,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:17:11,970 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-06 20:17:11,970 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 [2021-08-06 20:17:12,115 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:17:12,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076670164] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:17:12,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:17:12,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 26] total 44 [2021-08-06 20:17:12,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704373948] [2021-08-06 20:17:12,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-06 20:17:12,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:17:12,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-06 20:17:12,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1717, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 20:17:12,127 INFO L87 Difference]: Start difference. First operand 4607 states and 7441 transitions. Second operand has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:17:18,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:17:18,148 INFO L93 Difference]: Finished difference Result 9379 states and 14420 transitions. [2021-08-06 20:17:18,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-08-06 20:17:18,153 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-06 20:17:18,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:17:18,165 INFO L225 Difference]: With dead ends: 9379 [2021-08-06 20:17:18,165 INFO L226 Difference]: Without dead ends: 9312 [2021-08-06 20:17:18,166 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6179 ImplicationChecksByTransitivity, 4934.5ms TimeCoverageRelationStatistics Valid=1839, Invalid=16521, Unknown=0, NotChecked=0, Total=18360 [2021-08-06 20:17:18,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9312 states. [2021-08-06 20:17:18,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9312 to 4607. [2021-08-06 20:17:18,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4607 states, 4606 states have (on average 1.615501519756839) internal successors, (7441), 4606 states have internal predecessors, (7441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:17:18,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4607 states to 4607 states and 7441 transitions. [2021-08-06 20:17:18,236 INFO L78 Accepts]: Start accepts. Automaton has 4607 states and 7441 transitions. Word has length 49 [2021-08-06 20:17:18,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:17:18,236 INFO L470 AbstractCegarLoop]: Abstraction has 4607 states and 7441 transitions. [2021-08-06 20:17:18,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:17:18,236 INFO L276 IsEmpty]: Start isEmpty. Operand 4607 states and 7441 transitions. [2021-08-06 20:17:18,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-06 20:17:18,241 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:17:18,241 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:17:18,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-08-06 20:17:18,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-08-06 20:17:18,442 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:17:18,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:17:18,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1376982050, now seen corresponding path program 64 times [2021-08-06 20:17:18,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:17:18,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560462006] [2021-08-06 20:17:18,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:17:18,443 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:17:18,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:17:19,023 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 58.5 percent of original size [2021-08-06 20:17:19,026 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 58.5 percent of original size [2021-08-06 20:17:19,057 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:17:19,059 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:17:19,072 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:17:19,074 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:17:19,173 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:17:19,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:17:19,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560462006] [2021-08-06 20:17:19,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560462006] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:17:19,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714076345] [2021-08-06 20:17:19,174 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:17:19,174 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:17:19,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:17:19,174 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:17:19,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-06 20:17:23,677 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:17:23,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:17:23,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-06 20:17:23,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:17:25,363 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-06 20:17:25,364 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 [2021-08-06 20:17:25,497 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:17:25,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714076345] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:17:25,497 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:17:25,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 26] total 43 [2021-08-06 20:17:25,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334344814] [2021-08-06 20:17:25,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-06 20:17:25,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:17:25,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-06 20:17:25,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1636, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 20:17:25,498 INFO L87 Difference]: Start difference. First operand 4607 states and 7441 transitions. Second operand has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 43 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:17:33,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:17:33,414 INFO L93 Difference]: Finished difference Result 12274 states and 19022 transitions. [2021-08-06 20:17:33,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-08-06 20:17:33,414 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 43 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-06 20:17:33,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:17:33,426 INFO L225 Difference]: With dead ends: 12274 [2021-08-06 20:17:33,427 INFO L226 Difference]: Without dead ends: 11814 [2021-08-06 20:17:33,428 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12505 ImplicationChecksByTransitivity, 6389.2ms TimeCoverageRelationStatistics Valid=3191, Invalid=29751, Unknown=0, NotChecked=0, Total=32942 [2021-08-06 20:17:33,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11814 states. [2021-08-06 20:17:33,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11814 to 4723. [2021-08-06 20:17:33,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4723 states, 4722 states have (on average 1.6224057602710715) internal successors, (7661), 4722 states have internal predecessors, (7661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:17:33,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4723 states to 4723 states and 7661 transitions. [2021-08-06 20:17:33,490 INFO L78 Accepts]: Start accepts. Automaton has 4723 states and 7661 transitions. Word has length 49 [2021-08-06 20:17:33,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:17:33,490 INFO L470 AbstractCegarLoop]: Abstraction has 4723 states and 7661 transitions. [2021-08-06 20:17:33,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 43 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:17:33,490 INFO L276 IsEmpty]: Start isEmpty. Operand 4723 states and 7661 transitions. [2021-08-06 20:17:33,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-06 20:17:33,494 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:17:33,494 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:17:33,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-08-06 20:17:33,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:17:33,695 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:17:33,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:17:33,695 INFO L82 PathProgramCache]: Analyzing trace with hash -142856798, now seen corresponding path program 65 times [2021-08-06 20:17:33,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:17:33,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886930059] [2021-08-06 20:17:33,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:17:33,696 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:17:33,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:17:34,277 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 57.5 percent of original size [2021-08-06 20:17:34,280 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 57.5 percent of original size [2021-08-06 20:17:34,310 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 53.8 percent of original size [2021-08-06 20:17:34,312 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 53.8 percent of original size [2021-08-06 20:17:34,336 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:17:34,338 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:17:34,351 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:17:34,353 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:17:34,456 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:17:34,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:17:34,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886930059] [2021-08-06 20:17:34,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886930059] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:17:34,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563430933] [2021-08-06 20:17:34,457 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:17:34,457 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:17:34,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:17:34,457 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:17:34,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-06 20:17:39,416 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 20:17:39,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:17:39,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 20:17:39,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:17:42,045 INFO L354 Elim1Store]: treesize reduction 372, result has 3.4 percent of original size [2021-08-06 20:17:42,046 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 73 treesize of output 53 [2021-08-06 20:17:42,201 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:17:42,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563430933] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:17:42,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:17:42,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 26] total 44 [2021-08-06 20:17:42,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980964170] [2021-08-06 20:17:42,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-06 20:17:42,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:17:42,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-06 20:17:42,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1719, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 20:17:42,204 INFO L87 Difference]: Start difference. First operand 4723 states and 7661 transitions. Second operand has 44 states, 44 states have (on average 2.0) internal successors, (88), 44 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:17:55,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:17:55,566 INFO L93 Difference]: Finished difference Result 14463 states and 22458 transitions. [2021-08-06 20:17:55,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2021-08-06 20:17:55,566 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 44 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-06 20:17:55,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:17:55,589 INFO L225 Difference]: With dead ends: 14463 [2021-08-06 20:17:55,589 INFO L226 Difference]: Without dead ends: 14007 [2021-08-06 20:17:55,592 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15028 ImplicationChecksByTransitivity, 8633.8ms TimeCoverageRelationStatistics Valid=3547, Invalid=34673, Unknown=0, NotChecked=0, Total=38220 [2021-08-06 20:17:55,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14007 states. [2021-08-06 20:17:55,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14007 to 5379. [2021-08-06 20:17:55,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5379 states, 5378 states have (on average 1.64540721457791) internal successors, (8849), 5378 states have internal predecessors, (8849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:17:55,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5379 states to 5379 states and 8849 transitions. [2021-08-06 20:17:55,750 INFO L78 Accepts]: Start accepts. Automaton has 5379 states and 8849 transitions. Word has length 49 [2021-08-06 20:17:55,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:17:55,751 INFO L470 AbstractCegarLoop]: Abstraction has 5379 states and 8849 transitions. [2021-08-06 20:17:55,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 44 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:17:55,751 INFO L276 IsEmpty]: Start isEmpty. Operand 5379 states and 8849 transitions. [2021-08-06 20:17:55,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-06 20:17:55,757 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:17:55,758 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:17:55,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-08-06 20:17:55,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-08-06 20:17:55,981 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:17:55,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:17:55,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1952323248, now seen corresponding path program 66 times [2021-08-06 20:17:55,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:17:55,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673521037] [2021-08-06 20:17:55,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:17:55,981 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:17:56,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:17:56,601 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 20:17:56,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:17:56,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673521037] [2021-08-06 20:17:56,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673521037] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:17:56,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218383246] [2021-08-06 20:17:56,602 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:17:56,602 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:17:56,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:17:56,603 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:17:56,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-06 20:18:01,523 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 20:18:01,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:18:01,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-06 20:18:01,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:18:03,160 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-06 20:18:03,160 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 [2021-08-06 20:18:03,289 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:18:03,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218383246] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:18:03,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:18:03,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 26] total 45 [2021-08-06 20:18:03,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392462994] [2021-08-06 20:18:03,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-08-06 20:18:03,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:18:03,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-08-06 20:18:03,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1790, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 20:18:03,290 INFO L87 Difference]: Start difference. First operand 5379 states and 8849 transitions. Second operand has 45 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 45 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:18:13,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:18:13,898 INFO L93 Difference]: Finished difference Result 14486 states and 22338 transitions. [2021-08-06 20:18:13,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-08-06 20:18:13,898 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 45 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-06 20:18:13,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:18:13,916 INFO L225 Difference]: With dead ends: 14486 [2021-08-06 20:18:13,916 INFO L226 Difference]: Without dead ends: 14355 [2021-08-06 20:18:13,918 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11798 ImplicationChecksByTransitivity, 8908.9ms TimeCoverageRelationStatistics Valid=4808, Invalid=28864, Unknown=0, NotChecked=0, Total=33672 [2021-08-06 20:18:13,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14355 states. [2021-08-06 20:18:14,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14355 to 5511. [2021-08-06 20:18:14,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5511 states, 5510 states have (on average 1.644464609800363) internal successors, (9061), 5510 states have internal predecessors, (9061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:18:14,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5511 states to 5511 states and 9061 transitions. [2021-08-06 20:18:14,066 INFO L78 Accepts]: Start accepts. Automaton has 5511 states and 9061 transitions. Word has length 49 [2021-08-06 20:18:14,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:18:14,067 INFO L470 AbstractCegarLoop]: Abstraction has 5511 states and 9061 transitions. [2021-08-06 20:18:14,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 45 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:18:14,067 INFO L276 IsEmpty]: Start isEmpty. Operand 5511 states and 9061 transitions. [2021-08-06 20:18:14,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-06 20:18:14,074 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:18:14,074 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:18:14,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-08-06 20:18:14,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-08-06 20:18:14,287 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:18:14,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:18:14,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1081659548, now seen corresponding path program 67 times [2021-08-06 20:18:14,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:18:14,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999128056] [2021-08-06 20:18:14,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:18:14,288 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:18:14,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:18:15,084 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 20:18:15,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:18:15,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999128056] [2021-08-06 20:18:15,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999128056] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:18:15,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128141892] [2021-08-06 20:18:15,084 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:18:15,085 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:18:15,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:18:15,085 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:18:15,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-06 20:18:19,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:18:19,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-06 20:18:19,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:18:21,247 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-06 20:18:21,247 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 [2021-08-06 20:18:21,376 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:18:21,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128141892] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:18:21,376 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:18:21,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 26] total 45 [2021-08-06 20:18:21,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468787159] [2021-08-06 20:18:21,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-08-06 20:18:21,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:18:21,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-08-06 20:18:21,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1793, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 20:18:21,377 INFO L87 Difference]: Start difference. First operand 5511 states and 9061 transitions. Second operand has 45 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 45 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:18:27,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:18:27,188 INFO L93 Difference]: Finished difference Result 13928 states and 21626 transitions. [2021-08-06 20:18:27,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-08-06 20:18:27,188 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 45 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-06 20:18:27,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:18:27,205 INFO L225 Difference]: With dead ends: 13928 [2021-08-06 20:18:27,205 INFO L226 Difference]: Without dead ends: 13837 [2021-08-06 20:18:27,206 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6987 ImplicationChecksByTransitivity, 5321.2ms TimeCoverageRelationStatistics Valid=2857, Invalid=18899, Unknown=0, NotChecked=0, Total=21756 [2021-08-06 20:18:27,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13837 states. [2021-08-06 20:18:27,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13837 to 5519. [2021-08-06 20:18:27,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5519 states, 5518 states have (on average 1.6442551649148243) internal successors, (9073), 5518 states have internal predecessors, (9073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:18:27,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5519 states to 5519 states and 9073 transitions. [2021-08-06 20:18:27,293 INFO L78 Accepts]: Start accepts. Automaton has 5519 states and 9073 transitions. Word has length 49 [2021-08-06 20:18:27,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:18:27,294 INFO L470 AbstractCegarLoop]: Abstraction has 5519 states and 9073 transitions. [2021-08-06 20:18:27,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 45 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:18:27,294 INFO L276 IsEmpty]: Start isEmpty. Operand 5519 states and 9073 transitions. [2021-08-06 20:18:27,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-06 20:18:27,299 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:18:27,299 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:18:27,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-08-06 20:18:27,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-08-06 20:18:27,500 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:18:27,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:18:27,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1039253968, now seen corresponding path program 68 times [2021-08-06 20:18:27,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:18:27,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415750073] [2021-08-06 20:18:27,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:18:27,528 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:18:27,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:18:28,274 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 57.5 percent of original size [2021-08-06 20:18:28,277 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 57.5 percent of original size [2021-08-06 20:18:28,304 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:18:28,306 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:18:28,402 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 20:18:28,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:18:28,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415750073] [2021-08-06 20:18:28,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415750073] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:18:28,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072768953] [2021-08-06 20:18:28,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:18:28,403 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:18:28,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:18:28,404 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:18:28,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-06 20:18:33,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:18:33,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:18:33,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-06 20:18:33,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:18:35,213 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-06 20:18:35,213 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 [2021-08-06 20:18:35,392 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:18:35,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072768953] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:18:35,392 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:18:35,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 26] total 45 [2021-08-06 20:18:35,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319549767] [2021-08-06 20:18:35,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-08-06 20:18:35,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:18:35,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-08-06 20:18:35,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1797, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 20:18:35,393 INFO L87 Difference]: Start difference. First operand 5519 states and 9073 transitions. Second operand has 45 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 45 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:18:42,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:18:42,013 INFO L93 Difference]: Finished difference Result 10786 states and 16796 transitions. [2021-08-06 20:18:42,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-08-06 20:18:42,014 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 45 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-06 20:18:42,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:18:42,030 INFO L225 Difference]: With dead ends: 10786 [2021-08-06 20:18:42,031 INFO L226 Difference]: Without dead ends: 10723 [2021-08-06 20:18:42,032 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6936 ImplicationChecksByTransitivity, 6426.4ms TimeCoverageRelationStatistics Valid=2496, Invalid=19260, Unknown=0, NotChecked=0, Total=21756 [2021-08-06 20:18:42,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10723 states. [2021-08-06 20:18:42,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10723 to 5553. [2021-08-06 20:18:42,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5553 states, 5552 states have (on average 1.6439121037463977) internal successors, (9127), 5552 states have internal predecessors, (9127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:18:42,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5553 states to 5553 states and 9127 transitions. [2021-08-06 20:18:42,127 INFO L78 Accepts]: Start accepts. Automaton has 5553 states and 9127 transitions. Word has length 49 [2021-08-06 20:18:42,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:18:42,127 INFO L470 AbstractCegarLoop]: Abstraction has 5553 states and 9127 transitions. [2021-08-06 20:18:42,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 45 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:18:42,128 INFO L276 IsEmpty]: Start isEmpty. Operand 5553 states and 9127 transitions. [2021-08-06 20:18:42,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-06 20:18:42,135 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:18:42,135 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:18:42,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-08-06 20:18:42,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-08-06 20:18:42,361 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:18:42,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:18:42,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1861018416, now seen corresponding path program 69 times [2021-08-06 20:18:42,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:18:42,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522784561] [2021-08-06 20:18:42,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:18:42,361 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:18:42,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:18:42,971 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 57.5 percent of original size [2021-08-06 20:18:42,974 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 57.5 percent of original size [2021-08-06 20:18:43,000 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:18:43,002 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:18:43,100 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 20:18:43,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:18:43,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522784561] [2021-08-06 20:18:43,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522784561] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:18:43,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459491463] [2021-08-06 20:18:43,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:18:43,101 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:18:43,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:18:43,102 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:18:43,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-06 20:18:48,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 20:18:48,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:18:48,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-06 20:18:48,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:18:50,462 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-06 20:18:50,463 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 [2021-08-06 20:18:50,603 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:18:50,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459491463] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:18:50,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:18:50,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 26] total 43 [2021-08-06 20:18:50,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229611581] [2021-08-06 20:18:50,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-06 20:18:50,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:18:50,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-06 20:18:50,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1634, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 20:18:50,604 INFO L87 Difference]: Start difference. First operand 5553 states and 9127 transitions. Second operand has 43 states, 43 states have (on average 2.0) internal successors, (86), 43 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:18:55,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:18:55,701 INFO L93 Difference]: Finished difference Result 10582 states and 16574 transitions. [2021-08-06 20:18:55,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-08-06 20:18:55,701 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0) internal successors, (86), 43 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-06 20:18:55,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:18:55,714 INFO L225 Difference]: With dead ends: 10582 [2021-08-06 20:18:55,714 INFO L226 Difference]: Without dead ends: 10515 [2021-08-06 20:18:55,715 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7102 ImplicationChecksByTransitivity, 4822.9ms TimeCoverageRelationStatistics Valid=2146, Invalid=18446, Unknown=0, NotChecked=0, Total=20592 [2021-08-06 20:18:55,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10515 states. [2021-08-06 20:18:55,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10515 to 5553. [2021-08-06 20:18:55,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5553 states, 5552 states have (on average 1.6439121037463977) internal successors, (9127), 5552 states have internal predecessors, (9127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:18:55,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5553 states to 5553 states and 9127 transitions. [2021-08-06 20:18:55,788 INFO L78 Accepts]: Start accepts. Automaton has 5553 states and 9127 transitions. Word has length 49 [2021-08-06 20:18:55,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:18:55,788 INFO L470 AbstractCegarLoop]: Abstraction has 5553 states and 9127 transitions. [2021-08-06 20:18:55,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0) internal successors, (86), 43 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:18:55,788 INFO L276 IsEmpty]: Start isEmpty. Operand 5553 states and 9127 transitions. [2021-08-06 20:18:55,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-06 20:18:55,794 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:18:55,794 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:18:55,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-08-06 20:18:55,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:18:55,994 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:18:55,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:18:55,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1350128564, now seen corresponding path program 70 times [2021-08-06 20:18:55,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:18:55,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660776136] [2021-08-06 20:18:55,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:18:55,995 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:18:56,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:18:56,436 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 58.5 percent of original size [2021-08-06 20:18:56,438 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 58.5 percent of original size [2021-08-06 20:18:56,463 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:18:56,464 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:18:56,475 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:18:56,477 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 51.4 percent of original size [2021-08-06 20:18:56,552 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 20:18:56,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:18:56,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660776136] [2021-08-06 20:18:56,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660776136] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:18:56,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448083476] [2021-08-06 20:18:56,553 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:18:56,553 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:18:56,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:18:56,554 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:18:56,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-06 20:19:01,260 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:19:01,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:19:01,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-06 20:19:01,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:19:02,809 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-06 20:19:02,809 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 [2021-08-06 20:19:02,933 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:19:02,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448083476] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:19:02,934 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:19:02,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 26] total 42 [2021-08-06 20:19:02,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610089988] [2021-08-06 20:19:02,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-08-06 20:19:02,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:19:02,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-08-06 20:19:02,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1555, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 20:19:02,934 INFO L87 Difference]: Start difference. First operand 5553 states and 9127 transitions. Second operand has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 42 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:19:11,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:19:11,320 INFO L93 Difference]: Finished difference Result 13335 states and 20956 transitions. [2021-08-06 20:19:11,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2021-08-06 20:19:11,320 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 42 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-06 20:19:11,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:19:11,336 INFO L225 Difference]: With dead ends: 13335 [2021-08-06 20:19:11,336 INFO L226 Difference]: Without dead ends: 12886 [2021-08-06 20:19:11,337 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14026 ImplicationChecksByTransitivity, 6481.7ms TimeCoverageRelationStatistics Valid=3639, Invalid=32651, Unknown=0, NotChecked=0, Total=36290 [2021-08-06 20:19:11,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12886 states. [2021-08-06 20:19:11,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12886 to 5785. [2021-08-06 20:19:11,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5785 states, 5784 states have (on average 1.647994467496542) internal successors, (9532), 5784 states have internal predecessors, (9532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:19:11,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5785 states to 5785 states and 9532 transitions. [2021-08-06 20:19:11,417 INFO L78 Accepts]: Start accepts. Automaton has 5785 states and 9532 transitions. Word has length 49 [2021-08-06 20:19:11,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:19:11,417 INFO L470 AbstractCegarLoop]: Abstraction has 5785 states and 9532 transitions. [2021-08-06 20:19:11,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 42 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:19:11,417 INFO L276 IsEmpty]: Start isEmpty. Operand 5785 states and 9532 transitions. [2021-08-06 20:19:11,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-06 20:19:11,422 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:19:11,423 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 20:19:11,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-08-06 20:19:11,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:19:11,625 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:19:11,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:19:11,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1483705058, now seen corresponding path program 71 times [2021-08-06 20:19:11,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:19:11,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345866675] [2021-08-06 20:19:11,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:19:11,625 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:19:11,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:19:12,156 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 20:19:12,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:19:12,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345866675] [2021-08-06 20:19:12,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345866675] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:19:12,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191181226] [2021-08-06 20:19:12,156 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:19:12,156 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:19:12,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:19:12,157 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:19:12,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-06 20:19:17,001 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 20:19:17,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:19:17,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-06 20:19:17,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:19:18,578 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-06 20:19:18,579 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 [2021-08-06 20:19:18,703 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:19:18,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191181226] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:19:18,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:19:18,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 26] total 44 [2021-08-06 20:19:18,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981668761] [2021-08-06 20:19:18,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-06 20:19:18,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:19:18,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-06 20:19:18,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1713, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 20:19:18,704 INFO L87 Difference]: Start difference. First operand 5785 states and 9532 transitions. Second operand has 44 states, 44 states have (on average 1.9545454545454546) internal successors, (86), 44 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-08-06 20:19:27,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2021-08-06 20:19:27,849 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-06 20:19:27,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-08-06 20:19:27,886 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-06 20:19:27,886 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-06 20:19:28,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:19:28,051 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (5785states) and FLOYD_HOARE automaton (currently 138 states, 44 states before enhancement),while ReachableStatesComputation was computing reachable states (11816 states constructed, input type IntersectNwa). [2021-08-06 20:19:28,058 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-06 20:19:28,058 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-06 20:19:28,058 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-06 20:19:28,064 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-06 20:19:28,065 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-06 20:19:28,089 INFO L202 PluginConnector]: Adding new model prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.08 08:19:28 BasicIcfg [2021-08-06 20:19:28,089 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-06 20:19:28,090 INFO L168 Benchmark]: Toolchain (without parser) took 803704.78 ms. Allocated memory was 127.9 MB in the beginning and 2.3 GB in the end (delta: 2.2 GB). Free memory was 107.8 MB in the beginning and 411.4 MB in the end (delta: -303.5 MB). Peak memory consumption was 1.9 GB. Max. memory is 8.0 GB. [2021-08-06 20:19:28,090 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.16 ms. Allocated memory is still 127.9 MB. Free memory was 109.0 MB in the beginning and 108.9 MB in the end (delta: 125.9 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 20:19:28,090 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.81 ms. Allocated memory is still 127.9 MB. Free memory was 107.8 MB in the beginning and 106.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 20:19:28,090 INFO L168 Benchmark]: Boogie Preprocessor took 27.71 ms. Allocated memory is still 127.9 MB. Free memory was 106.3 MB in the beginning and 105.3 MB in the end (delta: 981.4 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 20:19:28,090 INFO L168 Benchmark]: RCFGBuilder took 413.79 ms. Allocated memory is still 127.9 MB. Free memory was 105.3 MB in the beginning and 92.0 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-08-06 20:19:28,090 INFO L168 Benchmark]: TraceAbstraction took 803200.37 ms. Allocated memory was 127.9 MB in the beginning and 2.3 GB in the end (delta: 2.2 GB). Free memory was 91.5 MB in the beginning and 411.4 MB in the end (delta: -319.9 MB). Peak memory consumption was 1.9 GB. Max. memory is 8.0 GB. [2021-08-06 20:19:28,094 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 0.16 ms. Allocated memory is still 127.9 MB. Free memory was 109.0 MB in the beginning and 108.9 MB in the end (delta: 125.9 kB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 43.81 ms. Allocated memory is still 127.9 MB. Free memory was 107.8 MB in the beginning and 106.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 27.71 ms. Allocated memory is still 127.9 MB. Free memory was 106.3 MB in the beginning and 105.3 MB in the end (delta: 981.4 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 413.79 ms. Allocated memory is still 127.9 MB. Free memory was 105.3 MB in the beginning and 92.0 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 803200.37 ms. Allocated memory was 127.9 MB in the beginning and 2.3 GB in the end (delta: 2.2 GB). Free memory was 91.5 MB in the beginning and 411.4 MB in the end (delta: -319.9 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: 258, positive: 212, positive conditional: 212, positive unconditional: 0, negative: 46, negative conditional: 46, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 237, positive: 212, positive conditional: 0, positive unconditional: 212, negative: 25, negative conditional: 0, negative unconditional: 25, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 69, positive: 64, positive conditional: 0, positive unconditional: 64, negative: 5, negative conditional: 0, negative unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 69, positive: 63, positive conditional: 0, positive unconditional: 63, negative: 6, negative conditional: 0, negative unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 6, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 5, negative conditional: 0, negative unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 19, positive: 3, positive conditional: 0, positive unconditional: 3, negative: 16, negative conditional: 0, negative unconditional: 16, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 237, positive: 148, positive conditional: 0, positive unconditional: 148, negative: 20, negative conditional: 0, negative unconditional: 20, unknown: 69, unknown conditional: 0, unknown unconditional: 69] , Statistics on independence cache: Total cache size (in pairs): 69, Positive cache size: 64, Positive conditional cache size: 0, Positive unconditional cache size: 64, Negative cache size: 5, Negative conditional cache size: 0, Negative unconditional cache size: 5, Independence queries for same thread: 21 - 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: 64]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (5785states) and FLOYD_HOARE automaton (currently 138 states, 44 states before enhancement),while ReachableStatesComputation was computing reachable states (11816 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 58]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (5785states) and FLOYD_HOARE automaton (currently 138 states, 44 states before enhancement),while ReachableStatesComputation was computing reachable states (11816 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (5785states) and FLOYD_HOARE automaton (currently 138 states, 44 states before enhancement),while ReachableStatesComputation was computing reachable states (11816 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (5785states) and FLOYD_HOARE automaton (currently 138 states, 44 states before enhancement),while ReachableStatesComputation was computing reachable states (11816 states constructed, input type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 45 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 802993.2ms, OverallIterations: 74, TraceHistogramMax: 5, EmptinessCheckTime: 322.9ms, AutomataDifference: 474028.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 133.2ms, PartialOrderReductionTime: 94.5ms, HoareTripleCheckerStatistics: 3722 SDtfs, 24847 SDslu, 64292 SDs, 0 SdLazy, 188426 SolverSat, 15552 SolverUnsat, 21 SolverUnknown, 0 SolverNotchecked, 152000.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11248 GetRequests, 2058 SyntacticMatches, 22 SemanticMatches, 9168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500315 ImplicationChecksByTransitivity, 361815.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=5785occurred in iteration=73, InterpolantAutomatonStates: 6875, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 3407.1ms AutomataMinimizationTime, 73 MinimizatonAttempts, 228061 StatesRemovedByMinimization, 72 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 512.4ms SsaConstructionTime, 2009.6ms SatisfiabilityAnalysisTime, 147618.0ms InterpolantComputationTime, 6190 NumberOfCodeBlocks, 6190 NumberOfCodeBlocksAsserted, 310 NumberOfCheckSat, 6045 ConstructedInterpolants, 58 QuantifiedInterpolants, 113595 SizeOfPredicates, 552 NumberOfNonLiveVariables, 7558 ConjunctsInSsa, 2367 ConjunctsInUnsatCore, 145 InterpolantComputations, 3 PerfectInterpolantSequences, 274/6761 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