/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/chl/word-trans.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 17:51:25,230 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 17:51:25,233 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 17:51:25,271 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-21 17:51:25,272 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-21 17:51:25,275 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-21 17:51:25,277 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-21 17:51:25,282 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-21 17:51:25,284 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-21 17:51:25,288 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-21 17:51:25,289 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-21 17:51:25,290 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-21 17:51:25,291 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-21 17:51:25,292 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-21 17:51:25,294 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-21 17:51:25,297 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-21 17:51:25,298 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-21 17:51:25,299 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-21 17:51:25,301 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-21 17:51:25,309 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-21 17:51:25,310 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-21 17:51:25,311 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-21 17:51:25,313 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-21 17:51:25,314 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-21 17:51:25,320 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-21 17:51:25,320 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-21 17:51:25,320 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-21 17:51:25,323 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-21 17:51:25,323 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-21 17:51:25,324 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-21 17:51:25,324 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-21 17:51:25,325 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-21 17:51:25,326 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-21 17:51:25,327 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-21 17:51:25,328 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-21 17:51:25,328 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-21 17:51:25,329 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-21 17:51:25,329 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-21 17:51:25,329 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 17:51:25,330 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 17:51:25,330 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 17:51:25,334 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf [2021-08-21 17:51:25,369 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 17:51:25,369 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 17:51:25,372 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 17:51:25,372 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 17:51:25,373 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 17:51:25,373 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 17:51:25,373 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 17:51:25,373 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 17:51:25,373 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 17:51:25,374 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 17:51:25,374 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 17:51:25,375 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 17:51:25,375 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 17:51:25,375 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 17:51:25,375 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 17:51:25,375 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 17:51:25,375 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 17:51:25,376 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 17:51:25,376 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 17:51:25,376 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 17:51:25,376 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 17:51:25,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 17:51:25,377 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 17:51:25,377 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 17:51:25,377 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 17:51:25,377 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 17:51:25,377 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 17:51:25,377 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 17:51:25,378 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 17:51:25,378 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-21 17:51:25,378 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 17:51:25,719 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 17:51:25,735 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 17:51:25,738 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 17:51:25,739 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 17:51:25,740 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 17:51:25,741 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/word-trans.wvr.bpl [2021-08-21 17:51:25,741 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/word-trans.wvr.bpl' [2021-08-21 17:51:25,785 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 17:51:25,787 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 17:51:25,788 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 17:51:25,788 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 17:51:25,788 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 17:51:25,799 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "word-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:51:25" (1/1) ... [2021-08-21 17:51:25,815 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "word-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:51:25" (1/1) ... [2021-08-21 17:51:25,823 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 17:51:25,824 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 17:51:25,825 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 17:51:25,825 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 17:51:25,831 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "word-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:51:25" (1/1) ... [2021-08-21 17:51:25,832 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "word-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:51:25" (1/1) ... [2021-08-21 17:51:25,834 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "word-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:51:25" (1/1) ... [2021-08-21 17:51:25,835 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "word-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:51:25" (1/1) ... [2021-08-21 17:51:25,847 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "word-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:51:25" (1/1) ... [2021-08-21 17:51:25,851 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "word-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:51:25" (1/1) ... [2021-08-21 17:51:25,855 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "word-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:51:25" (1/1) ... [2021-08-21 17:51:25,861 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 17:51:25,862 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 17:51:25,862 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 17:51:25,862 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 17:51:25,864 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "word-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:51:25" (1/1) ... [2021-08-21 17:51:25,870 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 17:51:25,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:51:25,894 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-21 17:51:25,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-21 17:51:25,945 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 17:51:25,946 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 17:51:25,946 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 17:51:25,946 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 17:51:25,946 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 17:51:25,946 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 17:51:25,947 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 17:51:25,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 17:51:25,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 17:51:25,947 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-21 17:51:25,947 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-21 17:51:25,947 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-21 17:51:25,948 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-21 17:51:26,301 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 17:51:26,301 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-08-21 17:51:26,303 INFO L202 PluginConnector]: Adding new model word-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:51:26 BoogieIcfgContainer [2021-08-21 17:51:26,303 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 17:51:26,305 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 17:51:26,305 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 17:51:26,307 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 17:51:26,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "word-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:51:25" (1/2) ... [2021-08-21 17:51:26,308 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d4bc6c and model type word-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:51:26, skipping insertion in model container [2021-08-21 17:51:26,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "word-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:51:26" (2/2) ... [2021-08-21 17:51:26,309 INFO L111 eAbstractionObserver]: Analyzing ICFG word-trans.wvr.bpl [2021-08-21 17:51:26,328 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 17:51:26,328 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 17:51:26,328 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 17:51:26,329 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 17:51:26,392 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-21 17:51:26,439 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 17:51:26,448 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-21 17:51:26,449 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-21 17:51:26,567 INFO L276 IsEmpty]: Start isEmpty. Operand has 108 states, 75 states have (on average 2.1466666666666665) internal successors, (161), 107 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:26,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 17:51:26,583 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:51:26,584 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:51:26,584 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:51:26,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:51:26,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1179014397, now seen corresponding path program 1 times [2021-08-21 17:51:26,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:51:26,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374406478] [2021-08-21 17:51:26,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:51:26,604 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:51:26,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:51:26,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:51:26,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:51:26,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374406478] [2021-08-21 17:51:26,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374406478] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:51:26,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:51:26,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 17:51:26,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807060675] [2021-08-21 17:51:26,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 17:51:26,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:51:26,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 17:51:26,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 17:51:26,926 INFO L87 Difference]: Start difference. First operand has 108 states, 75 states have (on average 2.1466666666666665) internal successors, (161), 107 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:27,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:51:27,083 INFO L93 Difference]: Finished difference Result 230 states and 308 transitions. [2021-08-21 17:51:27,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 17:51:27,084 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 17:51:27,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:51:27,091 INFO L225 Difference]: With dead ends: 230 [2021-08-21 17:51:27,092 INFO L226 Difference]: Without dead ends: 42 [2021-08-21 17:51:27,093 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 68.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 17:51:27,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-08-21 17:51:27,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 22. [2021-08-21 17:51:27,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:27,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2021-08-21 17:51:27,119 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 14 [2021-08-21 17:51:27,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:51:27,120 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2021-08-21 17:51:27,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:27,120 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2021-08-21 17:51:27,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 17:51:27,121 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:51:27,121 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:51:27,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 17:51:27,122 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:51:27,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:51:27,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1069536346, now seen corresponding path program 1 times [2021-08-21 17:51:27,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:51:27,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119638429] [2021-08-21 17:51:27,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:51:27,127 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:51:27,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:51:27,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:51:27,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:51:27,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119638429] [2021-08-21 17:51:27,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119638429] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:51:27,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:51:27,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 17:51:27,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579890633] [2021-08-21 17:51:27,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 17:51:27,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:51:27,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 17:51:27,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-21 17:51:27,276 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:27,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:51:27,341 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2021-08-21 17:51:27,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 17:51:27,341 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 17:51:27,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:51:27,343 INFO L225 Difference]: With dead ends: 39 [2021-08-21 17:51:27,343 INFO L226 Difference]: Without dead ends: 31 [2021-08-21 17:51:27,343 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-21 17:51:27,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-08-21 17:51:27,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 20. [2021-08-21 17:51:27,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:27,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2021-08-21 17:51:27,350 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 15 [2021-08-21 17:51:27,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:51:27,350 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2021-08-21 17:51:27,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:27,350 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2021-08-21 17:51:27,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 17:51:27,351 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:51:27,351 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:51:27,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 17:51:27,352 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:51:27,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:51:27,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1429214202, now seen corresponding path program 1 times [2021-08-21 17:51:27,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:51:27,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612717120] [2021-08-21 17:51:27,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:51:27,356 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:51:27,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:51:27,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:51:27,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:51:27,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612717120] [2021-08-21 17:51:27,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612717120] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:51:27,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:51:27,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 17:51:27,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145809319] [2021-08-21 17:51:27,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 17:51:27,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:51:27,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 17:51:27,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 17:51:27,464 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:27,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:51:27,546 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2021-08-21 17:51:27,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 17:51:27,547 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 17:51:27,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:51:27,549 INFO L225 Difference]: With dead ends: 37 [2021-08-21 17:51:27,549 INFO L226 Difference]: Without dead ends: 32 [2021-08-21 17:51:27,552 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 64.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 17:51:27,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-08-21 17:51:27,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2021-08-21 17:51:27,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:27,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2021-08-21 17:51:27,565 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 15 [2021-08-21 17:51:27,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:51:27,565 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2021-08-21 17:51:27,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:27,567 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2021-08-21 17:51:27,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 17:51:27,568 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:51:27,568 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:51:27,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 17:51:27,568 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:51:27,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:51:27,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1674795675, now seen corresponding path program 1 times [2021-08-21 17:51:27,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:51:27,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62932486] [2021-08-21 17:51:27,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:51:27,570 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:51:27,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:51:27,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:51:27,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:51:27,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62932486] [2021-08-21 17:51:27,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62932486] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:51:27,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:51:27,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 17:51:27,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886442259] [2021-08-21 17:51:27,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 17:51:27,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:51:27,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 17:51:27,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 17:51:27,648 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:27,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:51:27,723 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2021-08-21 17:51:27,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 17:51:27,723 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 17:51:27,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:51:27,725 INFO L225 Difference]: With dead ends: 47 [2021-08-21 17:51:27,725 INFO L226 Difference]: Without dead ends: 42 [2021-08-21 17:51:27,726 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 17:51:27,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-08-21 17:51:27,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 23. [2021-08-21 17:51:27,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:27,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2021-08-21 17:51:27,732 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 15 [2021-08-21 17:51:27,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:51:27,732 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2021-08-21 17:51:27,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:27,732 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2021-08-21 17:51:27,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 17:51:27,733 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:51:27,733 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:51:27,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-21 17:51:27,734 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:51:27,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:51:27,735 INFO L82 PathProgramCache]: Analyzing trace with hash 320244291, now seen corresponding path program 1 times [2021-08-21 17:51:27,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:51:27,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546882752] [2021-08-21 17:51:27,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:51:27,735 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:51:27,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:51:27,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:51:27,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:51:27,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546882752] [2021-08-21 17:51:27,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546882752] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:51:27,787 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:51:27,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 17:51:27,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549717324] [2021-08-21 17:51:27,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 17:51:27,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:51:27,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 17:51:27,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 17:51:27,791 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:27,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:51:27,830 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2021-08-21 17:51:27,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 17:51:27,831 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 17:51:27,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:51:27,832 INFO L225 Difference]: With dead ends: 32 [2021-08-21 17:51:27,832 INFO L226 Difference]: Without dead ends: 27 [2021-08-21 17:51:27,832 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 17:51:27,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-08-21 17:51:27,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2021-08-21 17:51:27,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:27,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-08-21 17:51:27,838 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 16 [2021-08-21 17:51:27,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:51:27,839 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-08-21 17:51:27,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:27,839 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-08-21 17:51:27,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 17:51:27,840 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:51:27,840 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:51:27,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-21 17:51:27,841 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:51:27,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:51:27,841 INFO L82 PathProgramCache]: Analyzing trace with hash -656664638, now seen corresponding path program 1 times [2021-08-21 17:51:27,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:51:27,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139383546] [2021-08-21 17:51:27,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:51:27,843 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:51:27,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:51:27,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:51:27,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:51:27,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139383546] [2021-08-21 17:51:27,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139383546] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:51:27,891 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:51:27,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 17:51:27,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860814324] [2021-08-21 17:51:27,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 17:51:27,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:51:27,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 17:51:27,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 17:51:27,893 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:27,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:51:27,914 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2021-08-21 17:51:27,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 17:51:27,914 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 17:51:27,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:51:27,915 INFO L225 Difference]: With dead ends: 27 [2021-08-21 17:51:27,915 INFO L226 Difference]: Without dead ends: 25 [2021-08-21 17:51:27,915 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 17:51:27,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-08-21 17:51:27,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 18. [2021-08-21 17:51:27,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:27,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-08-21 17:51:27,920 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 16 [2021-08-21 17:51:27,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:51:27,921 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-08-21 17:51:27,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:27,925 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-08-21 17:51:27,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 17:51:27,925 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:51:27,925 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:51:27,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-21 17:51:27,926 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:51:27,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:51:27,926 INFO L82 PathProgramCache]: Analyzing trace with hash -296986782, now seen corresponding path program 1 times [2021-08-21 17:51:27,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:51:27,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896446512] [2021-08-21 17:51:27,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:51:27,927 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:51:27,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:51:27,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:51:27,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:51:27,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896446512] [2021-08-21 17:51:27,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896446512] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:51:27,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:51:27,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 17:51:27,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966279652] [2021-08-21 17:51:27,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 17:51:27,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:51:27,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 17:51:27,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 17:51:27,967 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:27,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:51:27,976 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2021-08-21 17:51:27,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 17:51:27,977 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 17:51:27,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:51:27,978 INFO L225 Difference]: With dead ends: 18 [2021-08-21 17:51:27,978 INFO L226 Difference]: Without dead ends: 18 [2021-08-21 17:51:27,978 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 17:51:27,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-08-21 17:51:27,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-08-21 17:51:27,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:27,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-08-21 17:51:27,980 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 16 [2021-08-21 17:51:27,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:51:27,980 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-08-21 17:51:27,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:27,981 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-08-21 17:51:27,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 17:51:27,981 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:51:27,981 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:51:27,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-21 17:51:27,981 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:51:27,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:51:27,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1652378661, now seen corresponding path program 1 times [2021-08-21 17:51:27,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:51:27,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983362977] [2021-08-21 17:51:27,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:51:27,982 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:51:27,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:51:28,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:51:28,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:51:28,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983362977] [2021-08-21 17:51:28,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983362977] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:51:28,052 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:51:28,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 17:51:28,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91373106] [2021-08-21 17:51:28,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 17:51:28,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:51:28,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 17:51:28,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-21 17:51:28,054 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:28,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:51:28,144 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2021-08-21 17:51:28,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 17:51:28,144 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 17:51:28,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:51:28,145 INFO L225 Difference]: With dead ends: 49 [2021-08-21 17:51:28,145 INFO L226 Difference]: Without dead ends: 44 [2021-08-21 17:51:28,145 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 80.1ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:51:28,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-08-21 17:51:28,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 25. [2021-08-21 17:51:28,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:28,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-08-21 17:51:28,147 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 17 [2021-08-21 17:51:28,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:51:28,148 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-08-21 17:51:28,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:28,148 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-08-21 17:51:28,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:51:28,148 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:51:28,148 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:51:28,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-21 17:51:28,149 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:51:28,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:51:28,149 INFO L82 PathProgramCache]: Analyzing trace with hash 89492676, now seen corresponding path program 1 times [2021-08-21 17:51:28,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:51:28,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035530873] [2021-08-21 17:51:28,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:51:28,149 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:51:28,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:51:28,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:51:28,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:51:28,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035530873] [2021-08-21 17:51:28,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035530873] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:51:28,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613812502] [2021-08-21 17:51:28,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:51:28,246 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:51:28,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:51:28,253 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:51:28,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-21 17:51:28,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:51:28,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 17:51:28,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:51:28,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:51:28,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613812502] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:51:28,643 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:51:28,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 17:51:28,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773676995] [2021-08-21 17:51:28,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:51:28,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:51:28,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:51:28,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:51:28,645 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:28,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:51:28,848 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2021-08-21 17:51:28,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 17:51:28,849 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 17:51:28,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:51:28,849 INFO L225 Difference]: With dead ends: 42 [2021-08-21 17:51:28,850 INFO L226 Difference]: Without dead ends: 33 [2021-08-21 17:51:28,850 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 273.6ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:51:28,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-08-21 17:51:28,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 22. [2021-08-21 17:51:28,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:28,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-08-21 17:51:28,852 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 18 [2021-08-21 17:51:28,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:51:28,852 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-08-21 17:51:28,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:28,852 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-08-21 17:51:28,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:51:28,853 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:51:28,853 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:51:28,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-21 17:51:29,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:51:29,077 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:51:29,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:51:29,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1840224994, now seen corresponding path program 1 times [2021-08-21 17:51:29,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:51:29,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629565061] [2021-08-21 17:51:29,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:51:29,078 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:51:29,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:51:29,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:51:29,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:51:29,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629565061] [2021-08-21 17:51:29,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629565061] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:51:29,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539519540] [2021-08-21 17:51:29,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:51:29,149 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:51:29,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:51:29,150 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:51:29,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-21 17:51:29,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:51:29,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 17:51:29,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:51:29,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:51:29,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539519540] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:51:29,358 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:51:29,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-08-21 17:51:29,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984418185] [2021-08-21 17:51:29,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 17:51:29,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:51:29,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 17:51:29,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:51:29,360 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:29,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:51:29,457 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2021-08-21 17:51:29,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 17:51:29,457 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 17:51:29,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:51:29,458 INFO L225 Difference]: With dead ends: 31 [2021-08-21 17:51:29,458 INFO L226 Difference]: Without dead ends: 19 [2021-08-21 17:51:29,458 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 122.8ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:51:29,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-08-21 17:51:29,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-08-21 17:51:29,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:29,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-08-21 17:51:29,460 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 18 [2021-08-21 17:51:29,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:51:29,460 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-08-21 17:51:29,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:29,460 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-08-21 17:51:29,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:51:29,461 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:51:29,461 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:51:29,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-21 17:51:29,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-21 17:51:29,682 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:51:29,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:51:29,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1620819267, now seen corresponding path program 1 times [2021-08-21 17:51:29,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:51:29,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961091828] [2021-08-21 17:51:29,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:51:29,683 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:51:29,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:51:29,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:51:29,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:51:29,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961091828] [2021-08-21 17:51:29,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961091828] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:51:29,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193579971] [2021-08-21 17:51:29,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:51:29,770 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:51:29,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:51:29,771 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:51:29,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-21 17:51:29,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:51:29,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 17:51:29,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:51:30,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:51:30,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193579971] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:51:30,046 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:51:30,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 17:51:30,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152205289] [2021-08-21 17:51:30,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:51:30,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:51:30,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:51:30,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:51:30,047 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:30,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:51:30,150 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-08-21 17:51:30,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 17:51:30,150 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 17:51:30,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:51:30,150 INFO L225 Difference]: With dead ends: 36 [2021-08-21 17:51:30,151 INFO L226 Difference]: Without dead ends: 31 [2021-08-21 17:51:30,151 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 141.3ms TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:51:30,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-08-21 17:51:30,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2021-08-21 17:51:30,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:30,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-08-21 17:51:30,153 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 18 [2021-08-21 17:51:30,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:51:30,153 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-08-21 17:51:30,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:30,153 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-08-21 17:51:30,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 17:51:30,154 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:51:30,154 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:51:30,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-21 17:51:30,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:51:30,372 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:51:30,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:51:30,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1520586660, now seen corresponding path program 1 times [2021-08-21 17:51:30,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:51:30,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011418708] [2021-08-21 17:51:30,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:51:30,373 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:51:30,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:51:30,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:51:30,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:51:30,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011418708] [2021-08-21 17:51:30,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011418708] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:51:30,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125973946] [2021-08-21 17:51:30,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:51:30,427 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:51:30,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:51:30,433 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:51:30,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-21 17:51:30,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:51:30,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 17:51:30,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:51:30,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:51:30,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125973946] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:51:30,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:51:30,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-08-21 17:51:30,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143906475] [2021-08-21 17:51:30,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:51:30,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:51:30,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:51:30,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:51:30,629 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:30,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:51:30,707 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2021-08-21 17:51:30,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 17:51:30,708 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 17:51:30,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:51:30,708 INFO L225 Difference]: With dead ends: 23 [2021-08-21 17:51:30,708 INFO L226 Difference]: Without dead ends: 20 [2021-08-21 17:51:30,709 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 106.7ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:51:30,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-08-21 17:51:30,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-08-21 17:51:30,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 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) [2021-08-21 17:51:30,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-08-21 17:51:30,715 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 19 [2021-08-21 17:51:30,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:51:30,715 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-08-21 17:51:30,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:30,716 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-08-21 17:51:30,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 17:51:30,716 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:51:30,716 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:51:30,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-21 17:51:30,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:51:30,929 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:51:30,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:51:30,929 INFO L82 PathProgramCache]: Analyzing trace with hash 230145658, now seen corresponding path program 1 times [2021-08-21 17:51:30,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:51:30,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399631235] [2021-08-21 17:51:30,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:51:30,930 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:51:30,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:51:30,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:51:30,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:51:30,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399631235] [2021-08-21 17:51:30,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399631235] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:51:30,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709678104] [2021-08-21 17:51:30,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:51:30,970 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:51:30,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:51:30,971 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:51:30,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-21 17:51:31,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:51:31,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 17:51:31,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:51:31,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:51:31,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709678104] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:51:31,185 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:51:31,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-08-21 17:51:31,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225117710] [2021-08-21 17:51:31,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 17:51:31,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:51:31,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 17:51:31,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:51:31,186 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:31,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:51:31,245 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2021-08-21 17:51:31,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 17:51:31,246 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have 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 [2021-08-21 17:51:31,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:51:31,246 INFO L225 Difference]: With dead ends: 21 [2021-08-21 17:51:31,246 INFO L226 Difference]: Without dead ends: 21 [2021-08-21 17:51:31,247 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 72.3ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:51:31,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-08-21 17:51:31,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-08-21 17:51:31,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:31,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-08-21 17:51:31,248 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 19 [2021-08-21 17:51:31,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:51:31,248 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-08-21 17:51:31,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:31,248 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-08-21 17:51:31,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:51:31,249 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:51:31,249 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:51:31,274 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-08-21 17:51:31,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-21 17:51:31,473 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:51:31,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:51:31,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1681795579, now seen corresponding path program 1 times [2021-08-21 17:51:31,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:51:31,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607895992] [2021-08-21 17:51:31,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:51:31,474 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:51:31,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:51:31,825 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:51:31,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:51:31,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607895992] [2021-08-21 17:51:31,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607895992] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:51:31,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052947684] [2021-08-21 17:51:31,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:51:31,826 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:51:31,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:51:31,829 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:51:31,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-21 17:51:31,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:51:31,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 17:51:31,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:51:32,897 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:51:32,898 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 127 treesize of output 112 [2021-08-21 17:51:34,758 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:51:34,758 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 168 treesize of output 151 [2021-08-21 17:51:34,763 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 148 treesize of output 128 [2021-08-21 17:51:35,624 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:51:35,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052947684] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:51:35,624 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:51:35,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 17:51:35,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112233282] [2021-08-21 17:51:35,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 17:51:35,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:51:35,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 17:51:35,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:51:35,626 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:37,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:51:37,662 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2021-08-21 17:51:37,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:51:37,673 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 17:51:37,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:51:37,674 INFO L225 Difference]: With dead ends: 59 [2021-08-21 17:51:37,674 INFO L226 Difference]: Without dead ends: 39 [2021-08-21 17:51:37,674 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 2223.6ms TimeCoverageRelationStatistics Valid=213, Invalid=779, Unknown=0, NotChecked=0, Total=992 [2021-08-21 17:51:37,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-08-21 17:51:37,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2021-08-21 17:51:37,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:37,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-08-21 17:51:37,676 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2021-08-21 17:51:37,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:51:37,677 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-08-21 17:51:37,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:37,677 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-08-21 17:51:37,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:51:37,677 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:51:37,677 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:51:37,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-21 17:51:37,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:51:37,901 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:51:37,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:51:37,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1515156381, now seen corresponding path program 2 times [2021-08-21 17:51:37,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:51:37,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911993180] [2021-08-21 17:51:37,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:51:37,902 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:51:37,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:51:38,191 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:51:38,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:51:38,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911993180] [2021-08-21 17:51:38,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911993180] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:51:38,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438545241] [2021-08-21 17:51:38,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:51:38,191 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:51:38,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:51:38,192 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:51:38,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-21 17:51:38,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:51:38,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:51:38,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 17:51:38,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:51:38,586 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:51:38,587 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 61 treesize of output 54 [2021-08-21 17:51:39,195 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:51:39,195 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 99 treesize of output 86 [2021-08-21 17:51:39,199 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 75 treesize of output 59 [2021-08-21 17:51:39,482 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:51:39,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438545241] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:51:39,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:51:39,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 17:51:39,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198572360] [2021-08-21 17:51:39,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 17:51:39,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:51:39,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 17:51:39,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:51:39,484 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:40,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:51:40,562 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2021-08-21 17:51:40,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 17:51:40,562 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 17:51:40,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:51:40,563 INFO L225 Difference]: With dead ends: 63 [2021-08-21 17:51:40,563 INFO L226 Difference]: Without dead ends: 53 [2021-08-21 17:51:40,564 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1149.2ms TimeCoverageRelationStatistics Valid=183, Invalid=687, Unknown=0, NotChecked=0, Total=870 [2021-08-21 17:51:40,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-08-21 17:51:40,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 26. [2021-08-21 17:51:40,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:40,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-08-21 17:51:40,565 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 21 [2021-08-21 17:51:40,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:51:40,566 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-08-21 17:51:40,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:40,566 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-08-21 17:51:40,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:51:40,566 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:51:40,566 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:51:40,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-21 17:51:40,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:51:40,767 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:51:40,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:51:40,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1125380285, now seen corresponding path program 3 times [2021-08-21 17:51:40,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:51:40,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983817738] [2021-08-21 17:51:40,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:51:40,768 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:51:40,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:51:40,973 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:51:40,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:51:40,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983817738] [2021-08-21 17:51:40,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983817738] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:51:40,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857952451] [2021-08-21 17:51:40,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:51:40,974 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:51:40,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:51:40,981 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:51:40,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-21 17:51:41,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 17:51:41,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:51:41,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 17:51:41,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:51:41,469 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:51:41,470 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 35 treesize of output 34 [2021-08-21 17:51:41,719 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:51:41,719 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 30 treesize of output 29 [2021-08-21 17:51:41,722 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 26 treesize of output 22 [2021-08-21 17:51:41,785 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:51:41,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857952451] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:51:41,785 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:51:41,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-21 17:51:41,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401308442] [2021-08-21 17:51:41,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 17:51:41,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:51:41,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 17:51:41,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:51:41,786 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:42,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:51:42,253 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2021-08-21 17:51:42,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 17:51:42,254 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 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 22 [2021-08-21 17:51:42,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:51:42,254 INFO L225 Difference]: With dead ends: 32 [2021-08-21 17:51:42,254 INFO L226 Difference]: Without dead ends: 23 [2021-08-21 17:51:42,255 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 589.1ms TimeCoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2021-08-21 17:51:42,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-08-21 17:51:42,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-08-21 17:51:42,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:42,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-08-21 17:51:42,256 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 22 [2021-08-21 17:51:42,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:51:42,256 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-08-21 17:51:42,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:42,256 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-08-21 17:51:42,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:51:42,257 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:51:42,257 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:51:42,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-21 17:51:42,460 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,SelfDestructingSolverStorable15 [2021-08-21 17:51:42,461 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:51:42,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:51:42,461 INFO L82 PathProgramCache]: Analyzing trace with hash -501168830, now seen corresponding path program 4 times [2021-08-21 17:51:42,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:51:42,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187836474] [2021-08-21 17:51:42,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:51:42,461 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:51:42,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:51:42,611 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:51:42,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:51:42,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187836474] [2021-08-21 17:51:42,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187836474] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:51:42,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397897573] [2021-08-21 17:51:42,612 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:51:42,612 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:51:42,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:51:42,621 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:51:42,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-21 17:51:42,838 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:51:42,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:51:42,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 17:51:42,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:51:43,031 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:51:43,031 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 40 treesize of output 37 [2021-08-21 17:51:43,261 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:51:43,261 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 28 treesize of output 27 [2021-08-21 17:51:43,263 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 18 treesize of output 14 [2021-08-21 17:51:43,314 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:51:43,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397897573] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:51:43,315 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:51:43,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-21 17:51:43,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932458772] [2021-08-21 17:51:43,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 17:51:43,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:51:43,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 17:51:43,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:51:43,320 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:43,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:51:43,612 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2021-08-21 17:51:43,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 17:51:43,612 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 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 22 [2021-08-21 17:51:43,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:51:43,612 INFO L225 Difference]: With dead ends: 28 [2021-08-21 17:51:43,612 INFO L226 Difference]: Without dead ends: 24 [2021-08-21 17:51:43,613 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 379.0ms TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:51:43,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-08-21 17:51:43,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-08-21 17:51:43,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:43,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-08-21 17:51:43,615 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 22 [2021-08-21 17:51:43,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:51:43,615 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-08-21 17:51:43,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:43,615 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-08-21 17:51:43,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 17:51:43,615 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:51:43,617 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] [2021-08-21 17:51:43,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-21 17:51:43,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-21 17:51:43,821 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:51:43,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:51:43,821 INFO L82 PathProgramCache]: Analyzing trace with hash 243836635, now seen corresponding path program 5 times [2021-08-21 17:51:43,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:51:43,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037206975] [2021-08-21 17:51:43,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:51:43,821 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:51:43,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:51:44,212 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:51:44,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:51:44,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037206975] [2021-08-21 17:51:44,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037206975] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:51:44,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545228665] [2021-08-21 17:51:44,213 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:51:44,213 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:51:44,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:51:44,215 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:51:44,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-21 17:51:44,471 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:51:44,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:51:44,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 17:51:44,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:51:44,794 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 95 treesize of output 79 [2021-08-21 17:51:45,652 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 140 treesize of output 120 [2021-08-21 17:51:45,654 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 120 treesize of output 100 [2021-08-21 17:51:46,359 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:51:46,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545228665] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:51:46,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:51:46,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-21 17:51:46,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959661776] [2021-08-21 17:51:46,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 17:51:46,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:51:46,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 17:51:46,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:51:46,361 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:50,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:51:50,408 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2021-08-21 17:51:50,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 17:51:50,409 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 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 23 [2021-08-21 17:51:50,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:51:50,409 INFO L225 Difference]: With dead ends: 67 [2021-08-21 17:51:50,409 INFO L226 Difference]: Without dead ends: 57 [2021-08-21 17:51:50,410 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 4412.6ms TimeCoverageRelationStatistics Valid=247, Invalid=1235, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 17:51:50,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-08-21 17:51:50,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 33. [2021-08-21 17:51:50,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:50,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-08-21 17:51:50,412 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 23 [2021-08-21 17:51:50,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:51:50,412 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-08-21 17:51:50,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:50,413 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-08-21 17:51:50,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 17:51:50,413 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:51:50,413 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:51:50,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-21 17:51:50,624 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,SelfDestructingSolverStorable17 [2021-08-21 17:51:50,625 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:51:50,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:51:50,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1257375292, now seen corresponding path program 6 times [2021-08-21 17:51:50,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:51:50,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46224694] [2021-08-21 17:51:50,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:51:50,626 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:51:50,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:51:50,958 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:51:50,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:51:50,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46224694] [2021-08-21 17:51:50,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46224694] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:51:50,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120897013] [2021-08-21 17:51:50,958 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:51:50,958 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:51:50,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:51:50,959 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:51:50,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-21 17:51:51,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 17:51:51,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:51:51,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 17:51:51,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:51:51,632 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 88 treesize of output 72 [2021-08-21 17:51:52,320 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 102 treesize of output 86 [2021-08-21 17:51:52,322 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 86 treesize of output 70 [2021-08-21 17:51:52,517 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:51:52,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120897013] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:51:52,517 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:51:52,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-21 17:51:52,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690591572] [2021-08-21 17:51:52,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 17:51:52,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:51:52,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 17:51:52,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=499, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:51:52,519 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:54,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:51:54,897 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2021-08-21 17:51:54,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 17:51:54,898 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 17:51:54,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:51:54,899 INFO L225 Difference]: With dead ends: 74 [2021-08-21 17:51:54,899 INFO L226 Difference]: Without dead ends: 57 [2021-08-21 17:51:54,900 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 2655.7ms TimeCoverageRelationStatistics Valid=253, Invalid=1469, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 17:51:54,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-08-21 17:51:54,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 40. [2021-08-21 17:51:54,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 39 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:54,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2021-08-21 17:51:54,902 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 24 [2021-08-21 17:51:54,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:51:54,903 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2021-08-21 17:51:54,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:54,903 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2021-08-21 17:51:54,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 17:51:54,906 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:51:54,906 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:51:54,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-21 17:51:55,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:51:55,121 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:51:55,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:51:55,121 INFO L82 PathProgramCache]: Analyzing trace with hash -260111805, now seen corresponding path program 7 times [2021-08-21 17:51:55,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:51:55,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246626628] [2021-08-21 17:51:55,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:51:55,121 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:51:55,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:51:55,384 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:51:55,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:51:55,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246626628] [2021-08-21 17:51:55,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246626628] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:51:55,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984201230] [2021-08-21 17:51:55,384 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:51:55,384 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:51:55,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:51:55,385 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:51:55,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-21 17:51:55,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:51:55,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 17:51:55,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:51:55,939 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 62 treesize of output 50 [2021-08-21 17:51:56,376 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 92 treesize of output 76 [2021-08-21 17:51:56,379 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 76 treesize of output 60 [2021-08-21 17:51:56,583 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:51:56,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984201230] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:51:56,583 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:51:56,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-21 17:51:56,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613379876] [2021-08-21 17:51:56,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 17:51:56,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:51:56,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 17:51:56,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:51:56,585 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:57,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:51:57,695 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2021-08-21 17:51:57,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:51:57,695 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 17:51:57,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:51:57,695 INFO L225 Difference]: With dead ends: 56 [2021-08-21 17:51:57,695 INFO L226 Difference]: Without dead ends: 46 [2021-08-21 17:51:57,696 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1302.5ms TimeCoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 17:51:57,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-08-21 17:51:57,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 35. [2021-08-21 17:51:57,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:57,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-08-21 17:51:57,697 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 24 [2021-08-21 17:51:57,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:51:57,698 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-08-21 17:51:57,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:57,698 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-08-21 17:51:57,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:51:57,698 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:51:57,698 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:51:57,717 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-08-21 17:51:57,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:51:57,905 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:51:57,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:51:57,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1728305437, now seen corresponding path program 8 times [2021-08-21 17:51:57,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:51:57,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736162783] [2021-08-21 17:51:57,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:51:57,905 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:51:57,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:51:58,222 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:51:58,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:51:58,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736162783] [2021-08-21 17:51:58,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736162783] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:51:58,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222329694] [2021-08-21 17:51:58,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:51:58,223 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:51:58,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:51:58,224 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:51:58,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-21 17:51:58,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:51:58,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:51:58,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 17:51:58,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:51:58,952 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:51:58,952 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 35 treesize of output 34 [2021-08-21 17:51:59,235 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:51:59,235 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 30 treesize of output 29 [2021-08-21 17:51:59,238 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 26 treesize of output 22 [2021-08-21 17:51:59,304 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:51:59,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222329694] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:51:59,304 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:51:59,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-08-21 17:51:59,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108551004] [2021-08-21 17:51:59,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 17:51:59,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:51:59,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 17:51:59,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:51:59,306 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:52:00,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:52:00,068 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2021-08-21 17:52:00,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:52:00,069 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:52:00,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:52:00,069 INFO L225 Difference]: With dead ends: 37 [2021-08-21 17:52:00,069 INFO L226 Difference]: Without dead ends: 26 [2021-08-21 17:52:00,070 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 940.3ms TimeCoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 17:52:00,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-08-21 17:52:00,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-08-21 17:52:00,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:52:00,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-08-21 17:52:00,071 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 25 [2021-08-21 17:52:00,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:52:00,071 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-08-21 17:52:00,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:52:00,072 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-08-21 17:52:00,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:52:00,072 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:52:00,072 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:52:00,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-21 17:52:00,292 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,SelfDestructingSolverStorable20 [2021-08-21 17:52:00,293 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:52:00,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:52:00,293 INFO L82 PathProgramCache]: Analyzing trace with hash -873330182, now seen corresponding path program 9 times [2021-08-21 17:52:00,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:52:00,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523890986] [2021-08-21 17:52:00,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:52:00,294 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:52:00,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:52:00,526 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:52:00,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:52:00,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523890986] [2021-08-21 17:52:00,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523890986] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:52:00,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086434945] [2021-08-21 17:52:00,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:52:00,526 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:52:00,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:52:00,527 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:52:00,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-21 17:52:00,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 17:52:00,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:52:00,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 17:52:00,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:52:01,214 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:52:01,214 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 28 treesize of output 27 [2021-08-21 17:52:01,437 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 40 treesize of output 34 [2021-08-21 17:52:01,444 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:52:01,444 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 33 treesize of output 28 [2021-08-21 17:52:01,496 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:52:01,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086434945] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:52:01,496 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:52:01,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-08-21 17:52:01,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751145744] [2021-08-21 17:52:01,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 17:52:01,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:52:01,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 17:52:01,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:52:01,498 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:52:01,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:52:01,771 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2021-08-21 17:52:01,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:52:01,772 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:52:01,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:52:01,773 INFO L225 Difference]: With dead ends: 27 [2021-08-21 17:52:01,773 INFO L226 Difference]: Without dead ends: 27 [2021-08-21 17:52:01,773 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 460.1ms TimeCoverageRelationStatistics Valid=157, Invalid=773, Unknown=0, NotChecked=0, Total=930 [2021-08-21 17:52:01,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-08-21 17:52:01,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-08-21 17:52:01,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:52:01,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-08-21 17:52:01,774 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 25 [2021-08-21 17:52:01,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:52:01,775 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-08-21 17:52:01,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:52:01,775 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-08-21 17:52:01,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 17:52:01,775 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:52:01,775 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:52:01,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-21 17:52:01,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:52:01,977 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:52:01,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:52:01,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1529808251, now seen corresponding path program 10 times [2021-08-21 17:52:01,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:52:01,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708229564] [2021-08-21 17:52:01,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:52:01,977 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:52:01,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:52:02,422 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:52:02,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:52:02,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708229564] [2021-08-21 17:52:02,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708229564] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:52:02,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117280110] [2021-08-21 17:52:02,423 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:52:02,423 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:52:02,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:52:02,429 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:52:02,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-21 17:52:02,945 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:52:02,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:52:02,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 17:52:02,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:52:03,673 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:52:03,673 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 92 treesize of output 81 [2021-08-21 17:52:04,961 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:52:04,962 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 142 treesize of output 127 [2021-08-21 17:52:04,965 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 124 treesize of output 106 [2021-08-21 17:52:05,707 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:52:05,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117280110] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:52:05,708 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:52:05,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2021-08-21 17:52:05,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986404406] [2021-08-21 17:52:05,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 17:52:05,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:52:05,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 17:52:05,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=746, Unknown=0, NotChecked=0, Total=812 [2021-08-21 17:52:05,709 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:52:07,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:52:07,413 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2021-08-21 17:52:07,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:52:07,413 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 17:52:07,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:52:07,414 INFO L225 Difference]: With dead ends: 53 [2021-08-21 17:52:07,414 INFO L226 Difference]: Without dead ends: 48 [2021-08-21 17:52:07,414 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 2084.2ms TimeCoverageRelationStatistics Valid=197, Invalid=1363, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 17:52:07,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-08-21 17:52:07,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 37. [2021-08-21 17:52:07,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:52:07,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2021-08-21 17:52:07,416 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 26 [2021-08-21 17:52:07,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:52:07,416 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2021-08-21 17:52:07,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:52:07,416 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2021-08-21 17:52:07,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 17:52:07,417 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:52:07,417 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:52:07,441 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-08-21 17:52:07,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:52:07,633 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:52:07,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:52:07,633 INFO L82 PathProgramCache]: Analyzing trace with hash -405791910, now seen corresponding path program 11 times [2021-08-21 17:52:07,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:52:07,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607117459] [2021-08-21 17:52:07,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:52:07,633 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:52:07,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:52:07,978 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:52:07,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:52:07,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607117459] [2021-08-21 17:52:07,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607117459] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:52:07,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171842992] [2021-08-21 17:52:07,979 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:52:07,979 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:52:07,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:52:07,980 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:52:07,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-21 17:52:08,529 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 17:52:08,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:52:08,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 17:52:08,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:52:09,475 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:52:09,476 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 112 treesize of output 99 [2021-08-21 17:52:11,088 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:52:11,088 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 113 treesize of output 104 [2021-08-21 17:52:11,091 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 101 treesize of output 89 [2021-08-21 17:52:11,381 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:52:11,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171842992] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:52:11,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:52:11,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2021-08-21 17:52:11,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819539226] [2021-08-21 17:52:11,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 17:52:11,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:52:11,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 17:52:11,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=748, Unknown=0, NotChecked=0, Total=812 [2021-08-21 17:52:11,382 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 29 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:52:13,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:52:13,920 INFO L93 Difference]: Finished difference Result 81 states and 87 transitions. [2021-08-21 17:52:13,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 17:52:13,920 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 29 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 17:52:13,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:52:13,921 INFO L225 Difference]: With dead ends: 81 [2021-08-21 17:52:13,921 INFO L226 Difference]: Without dead ends: 63 [2021-08-21 17:52:13,922 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 2750.9ms TimeCoverageRelationStatistics Valid=324, Invalid=2226, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 17:52:13,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-08-21 17:52:13,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 45. [2021-08-21 17:52:13,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 44 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:52:13,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2021-08-21 17:52:13,924 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 27 [2021-08-21 17:52:13,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:52:13,924 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2021-08-21 17:52:13,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 29 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:52:13,924 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2021-08-21 17:52:13,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 17:52:13,924 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:52:13,924 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:52:13,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-21 17:52:14,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-21 17:52:14,141 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:52:14,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:52:14,141 INFO L82 PathProgramCache]: Analyzing trace with hash 547882525, now seen corresponding path program 12 times [2021-08-21 17:52:14,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:52:14,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322621759] [2021-08-21 17:52:14,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:52:14,141 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:52:14,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:52:14,402 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:52:14,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:52:14,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322621759] [2021-08-21 17:52:14,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322621759] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:52:14,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330348080] [2021-08-21 17:52:14,403 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:52:14,403 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:52:14,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:52:14,408 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:52:14,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-21 17:52:15,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 17:52:15,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:52:15,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 17:52:15,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:52:15,340 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:52:15,340 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 78 treesize of output 69 [2021-08-21 17:52:16,128 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:52:16,129 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 104 treesize of output 91 [2021-08-21 17:52:16,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 64 [2021-08-21 17:52:16,327 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:52:16,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330348080] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:52:16,327 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:52:16,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2021-08-21 17:52:16,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216664616] [2021-08-21 17:52:16,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 17:52:16,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:52:16,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 17:52:16,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=739, Unknown=0, NotChecked=0, Total=812 [2021-08-21 17:52:16,329 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 29 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:52:17,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:52:17,608 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2021-08-21 17:52:17,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 17:52:17,608 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 29 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 17:52:17,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:52:17,609 INFO L225 Difference]: With dead ends: 67 [2021-08-21 17:52:17,609 INFO L226 Difference]: Without dead ends: 51 [2021-08-21 17:52:17,609 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1470.9ms TimeCoverageRelationStatistics Valid=289, Invalid=1781, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 17:52:17,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-08-21 17:52:17,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 29. [2021-08-21 17:52:17,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:52:17,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-08-21 17:52:17,611 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 27 [2021-08-21 17:52:17,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:52:17,611 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-08-21 17:52:17,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 29 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:52:17,612 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-08-21 17:52:17,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 17:52:17,612 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:52:17,612 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:52:17,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-21 17:52:17,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:52:17,817 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:52:17,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:52:17,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1996416067, now seen corresponding path program 13 times [2021-08-21 17:52:17,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:52:17,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401379111] [2021-08-21 17:52:17,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:52:17,818 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:52:17,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:52:18,165 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:52:18,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:52:18,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401379111] [2021-08-21 17:52:18,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401379111] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:52:18,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104938559] [2021-08-21 17:52:18,166 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:52:18,166 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:52:18,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:52:18,167 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:52:18,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-21 17:52:18,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:52:18,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 17:52:18,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:52:19,656 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:52:19,657 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 67 treesize of output 62 [2021-08-21 17:52:20,360 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:52:20,360 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 54 treesize of output 51 [2021-08-21 17:52:20,365 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 48 treesize of output 42 [2021-08-21 17:52:20,444 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:52:20,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104938559] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:52:20,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:52:20,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 28 [2021-08-21 17:52:20,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827428179] [2021-08-21 17:52:20,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 17:52:20,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:52:20,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 17:52:20,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=685, Unknown=0, NotChecked=0, Total=756 [2021-08-21 17:52:20,445 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:52:21,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:52:21,548 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2021-08-21 17:52:21,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:52:21,549 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 17:52:21,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:52:21,549 INFO L225 Difference]: With dead ends: 43 [2021-08-21 17:52:21,549 INFO L226 Difference]: Without dead ends: 30 [2021-08-21 17:52:21,549 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1377.7ms TimeCoverageRelationStatistics Valid=203, Invalid=1357, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 17:52:21,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-08-21 17:52:21,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-08-21 17:52:21,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:52:21,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-08-21 17:52:21,551 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 28 [2021-08-21 17:52:21,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:52:21,551 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-08-21 17:52:21,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:52:21,551 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-08-21 17:52:21,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 17:52:21,551 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:52:21,551 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:52:21,570 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-08-21 17:52:21,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:52:21,752 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:52:21,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:52:21,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1497459163, now seen corresponding path program 14 times [2021-08-21 17:52:21,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:52:21,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658577270] [2021-08-21 17:52:21,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:52:21,753 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:52:21,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:52:22,382 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:52:22,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:52:22,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658577270] [2021-08-21 17:52:22,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658577270] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:52:22,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122584399] [2021-08-21 17:52:22,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:52:22,383 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:52:22,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:52:22,386 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:52:22,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-21 17:52:23,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:52:23,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:52:23,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 17:52:23,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:52:24,082 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:52:24,083 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 112 treesize of output 99 [2021-08-21 17:52:26,237 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:52:26,237 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 154 treesize of output 139 [2021-08-21 17:52:26,251 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 136 treesize of output 118 [2021-08-21 17:52:26,887 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:52:26,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122584399] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:52:26,888 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:52:26,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 34 [2021-08-21 17:52:26,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252802872] [2021-08-21 17:52:26,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-21 17:52:26,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:52:26,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-21 17:52:26,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=1044, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 17:52:26,889 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 34 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 34 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:52:30,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:52:30,640 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2021-08-21 17:52:30,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 17:52:30,641 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 34 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 17:52:30,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:52:30,641 INFO L225 Difference]: With dead ends: 71 [2021-08-21 17:52:30,641 INFO L226 Difference]: Without dead ends: 53 [2021-08-21 17:52:30,642 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 4210.3ms TimeCoverageRelationStatistics Valid=270, Invalid=2082, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 17:52:30,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-08-21 17:52:30,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2021-08-21 17:52:30,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:52:30,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-08-21 17:52:30,643 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 29 [2021-08-21 17:52:30,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:52:30,644 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-08-21 17:52:30,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 34 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:52:30,644 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-08-21 17:52:30,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 17:52:30,644 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:52:30,644 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:52:30,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-21 17:52:30,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:52:30,845 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:52:30,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:52:30,845 INFO L82 PathProgramCache]: Analyzing trace with hash 867657186, now seen corresponding path program 15 times [2021-08-21 17:52:30,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:52:30,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211526941] [2021-08-21 17:52:30,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:52:30,846 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:52:30,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:52:31,422 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:52:31,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:52:31,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211526941] [2021-08-21 17:52:31,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211526941] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:52:31,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039622291] [2021-08-21 17:52:31,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:52:31,423 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:52:31,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:52:31,424 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:52:31,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-21 17:52:32,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 17:52:32,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:52:32,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-21 17:52:32,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:52:33,485 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:52:33,485 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 82 treesize of output 75 [2021-08-21 17:52:34,347 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:52:34,348 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 87 treesize of output 78 [2021-08-21 17:52:34,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 63 [2021-08-21 17:52:34,585 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:52:34,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039622291] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:52:34,588 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:52:34,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 35 [2021-08-21 17:52:34,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939428035] [2021-08-21 17:52:34,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-21 17:52:34,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:52:34,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-21 17:52:34,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=1112, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 17:52:34,589 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 35 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 35 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:52:37,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:52:37,185 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2021-08-21 17:52:37,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 17:52:37,186 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 35 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 17:52:37,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:52:37,186 INFO L225 Difference]: With dead ends: 57 [2021-08-21 17:52:37,186 INFO L226 Difference]: Without dead ends: 31 [2021-08-21 17:52:37,187 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 3024.8ms TimeCoverageRelationStatistics Valid=272, Invalid=2178, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 17:52:37,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-08-21 17:52:37,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-08-21 17:52:37,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:52:37,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-08-21 17:52:37,188 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 30 [2021-08-21 17:52:37,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:52:37,188 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-08-21 17:52:37,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 35 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:52:37,188 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-08-21 17:52:37,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 17:52:37,188 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:52:37,189 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:52:37,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-21 17:52:37,396 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,SelfDestructingSolverStorable27 [2021-08-21 17:52:37,397 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:52:37,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:52:37,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1085302973, now seen corresponding path program 16 times [2021-08-21 17:52:37,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:52:37,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661796463] [2021-08-21 17:52:37,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:52:37,398 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:52:37,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:52:38,023 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:52:38,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:52:38,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661796463] [2021-08-21 17:52:38,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661796463] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:52:38,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013438627] [2021-08-21 17:52:38,024 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:52:38,024 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:52:38,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:52:38,037 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:52:38,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-21 17:52:38,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:52:38,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:52:38,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 17:52:38,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:52:39,362 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:52:39,363 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 78 treesize of output 69 [2021-08-21 17:52:40,311 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:52:40,311 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 111 treesize of output 96 [2021-08-21 17:52:40,320 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 85 treesize of output 67 [2021-08-21 17:52:40,512 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:52:40,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013438627] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:52:40,513 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:52:40,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 34 [2021-08-21 17:52:40,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714915735] [2021-08-21 17:52:40,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-21 17:52:40,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:52:40,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-21 17:52:40,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1033, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 17:52:40,514 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 34 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 34 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:52:41,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:52:41,960 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2021-08-21 17:52:41,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 17:52:41,960 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 34 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 17:52:41,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:52:41,961 INFO L225 Difference]: With dead ends: 58 [2021-08-21 17:52:41,961 INFO L226 Difference]: Without dead ends: 48 [2021-08-21 17:52:41,962 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1886.7ms TimeCoverageRelationStatistics Valid=343, Invalid=2519, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 17:52:41,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-08-21 17:52:41,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 32. [2021-08-21 17:52:41,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:52:41,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2021-08-21 17:52:41,963 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 30 [2021-08-21 17:52:41,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:52:41,963 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2021-08-21 17:52:41,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 34 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:52:41,963 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2021-08-21 17:52:41,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 17:52:41,964 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:52:41,964 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:52:41,983 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-08-21 17:52:42,168 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,SelfDestructingSolverStorable28 [2021-08-21 17:52:42,169 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:52:42,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:52:42,169 INFO L82 PathProgramCache]: Analyzing trace with hash 488969820, now seen corresponding path program 17 times [2021-08-21 17:52:42,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:52:42,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468998100] [2021-08-21 17:52:42,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:52:42,169 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:52:42,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:52:42,546 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:52:42,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:52:42,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468998100] [2021-08-21 17:52:42,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468998100] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:52:42,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246280763] [2021-08-21 17:52:42,547 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:52:42,547 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:52:42,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:52:42,548 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:52:42,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-21 17:52:43,525 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 17:52:43,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:52:43,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-21 17:52:43,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:52:43,864 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:52:43,864 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 73 treesize of output 64 [2021-08-21 17:52:44,697 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:52:44,697 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 61 treesize of output 54 [2021-08-21 17:52:44,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2021-08-21 17:52:44,758 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:52:44,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246280763] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:52:44,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:52:44,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 33 [2021-08-21 17:52:44,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968855374] [2021-08-21 17:52:44,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 17:52:44,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:52:44,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 17:52:44,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=965, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 17:52:44,759 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 33 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 33 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:52:45,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:52:45,635 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2021-08-21 17:52:45,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 17:52:45,636 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 33 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 17:52:45,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:52:45,636 INFO L225 Difference]: With dead ends: 40 [2021-08-21 17:52:45,636 INFO L226 Difference]: Without dead ends: 33 [2021-08-21 17:52:45,637 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 1207.0ms TimeCoverageRelationStatistics Valid=230, Invalid=1750, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 17:52:45,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-08-21 17:52:45,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-08-21 17:52:45,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:52:45,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-08-21 17:52:45,638 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 31 [2021-08-21 17:52:45,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:52:45,638 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-08-21 17:52:45,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 33 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:52:45,638 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-08-21 17:52:45,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 17:52:45,638 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:52:45,638 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:52:45,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-21 17:52:45,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:52:45,839 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:52:45,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:52:45,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1357876997, now seen corresponding path program 18 times [2021-08-21 17:52:45,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:52:45,839 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364948620] [2021-08-21 17:52:45,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:52:45,840 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:52:45,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:52:46,412 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:52:46,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:52:46,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364948620] [2021-08-21 17:52:46,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364948620] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:52:46,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518930686] [2021-08-21 17:52:46,413 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:52:46,413 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:52:46,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:52:46,418 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:52:46,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-21 17:52:47,486 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 17:52:47,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:52:47,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-21 17:52:47,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:52:48,370 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:52:48,371 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 101 treesize of output 88 [2021-08-21 17:52:50,040 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:52:50,040 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 137 treesize of output 120 [2021-08-21 17:52:50,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 91 [2021-08-21 17:52:50,560 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:52:50,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518930686] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:52:50,560 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:52:50,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 39 [2021-08-21 17:52:50,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023704961] [2021-08-21 17:52:50,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-21 17:52:50,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:52:50,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-21 17:52:50,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1392, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 17:52:50,561 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 39 states, 39 states have (on average 1.4102564102564104) internal successors, (55), 39 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:52:53,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:52:53,805 INFO L93 Difference]: Finished difference Result 77 states and 82 transitions. [2021-08-21 17:52:53,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 17:52:53,805 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.4102564102564104) internal successors, (55), 39 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 17:52:53,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:52:53,805 INFO L225 Difference]: With dead ends: 77 [2021-08-21 17:52:53,805 INFO L226 Difference]: Without dead ends: 58 [2021-08-21 17:52:53,806 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 3747.4ms TimeCoverageRelationStatistics Valid=311, Invalid=2769, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 17:52:53,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-08-21 17:52:53,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 37. [2021-08-21 17:52:53,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 36 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:52:53,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2021-08-21 17:52:53,807 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 32 [2021-08-21 17:52:53,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:52:53,807 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2021-08-21 17:52:53,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.4102564102564104) internal successors, (55), 39 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:52:53,807 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2021-08-21 17:52:53,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 17:52:53,808 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:52:53,808 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:52:53,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-21 17:52:54,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:52:54,013 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:52:54,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:52:54,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1770771588, now seen corresponding path program 19 times [2021-08-21 17:52:54,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:52:54,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734826132] [2021-08-21 17:52:54,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:52:54,014 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:52:54,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:52:54,681 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:52:54,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:52:54,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734826132] [2021-08-21 17:52:54,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734826132] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:52:54,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467623263] [2021-08-21 17:52:54,681 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:52:54,681 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:52:54,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:52:54,682 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:52:54,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-21 17:52:55,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:52:55,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-21 17:52:55,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:52:56,983 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:52:56,983 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 67 treesize of output 62 [2021-08-21 17:52:57,980 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:52:57,980 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 87 treesize of output 78 [2021-08-21 17:52:57,982 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 75 treesize of output 63 [2021-08-21 17:52:58,217 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:52:58,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467623263] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:52:58,217 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:52:58,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 40 [2021-08-21 17:52:58,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520035455] [2021-08-21 17:52:58,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 17:52:58,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:52:58,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 17:52:58,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1470, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 17:52:58,218 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 40 states, 40 states have (on average 1.425) internal successors, (57), 40 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:01,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:53:01,388 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2021-08-21 17:53:01,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 17:53:01,389 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.425) internal successors, (57), 40 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 17:53:01,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:53:01,389 INFO L225 Difference]: With dead ends: 62 [2021-08-21 17:53:01,389 INFO L226 Difference]: Without dead ends: 34 [2021-08-21 17:53:01,390 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 3765.1ms TimeCoverageRelationStatistics Valid=313, Invalid=2879, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 17:53:01,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-08-21 17:53:01,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-08-21 17:53:01,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:01,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2021-08-21 17:53:01,391 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 33 [2021-08-21 17:53:01,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:53:01,391 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2021-08-21 17:53:01,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.425) internal successors, (57), 40 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:01,391 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2021-08-21 17:53:01,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 17:53:01,391 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:53:01,391 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:53:01,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-21 17:53:01,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:53:01,592 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:53:01,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:53:01,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1664776035, now seen corresponding path program 20 times [2021-08-21 17:53:01,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:53:01,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422243403] [2021-08-21 17:53:01,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:53:01,593 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:53:01,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:53:02,060 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:53:02,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:53:02,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422243403] [2021-08-21 17:53:02,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422243403] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:53:02,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550672315] [2021-08-21 17:53:02,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:53:02,060 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:53:02,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:53:02,061 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:53:02,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-21 17:53:03,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:53:03,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:53:03,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-21 17:53:03,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:53:03,726 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:53:03,726 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 78 treesize of output 69 [2021-08-21 17:53:04,818 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:53:04,818 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 104 treesize of output 91 [2021-08-21 17:53:04,821 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 80 treesize of output 64 [2021-08-21 17:53:05,111 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:53:05,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550672315] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:53:05,111 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:53:05,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 39 [2021-08-21 17:53:05,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818444962] [2021-08-21 17:53:05,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-21 17:53:05,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:53:05,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-21 17:53:05,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1379, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 17:53:05,113 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 39 states, 39 states have (on average 1.4615384615384615) internal successors, (57), 39 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:06,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:53:06,798 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2021-08-21 17:53:06,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 17:53:06,799 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.4615384615384615) internal successors, (57), 39 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 17:53:06,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:53:06,799 INFO L225 Difference]: With dead ends: 57 [2021-08-21 17:53:06,799 INFO L226 Difference]: Without dead ends: 52 [2021-08-21 17:53:06,800 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 2093.0ms TimeCoverageRelationStatistics Valid=313, Invalid=2767, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 17:53:06,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-08-21 17:53:06,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 38. [2021-08-21 17:53:06,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 37 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:06,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-08-21 17:53:06,801 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 33 [2021-08-21 17:53:06,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:53:06,801 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-08-21 17:53:06,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.4615384615384615) internal successors, (57), 39 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:06,802 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-08-21 17:53:06,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 17:53:06,802 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:53:06,802 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:53:06,823 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-08-21 17:53:07,002 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,SelfDestructingSolverStorable32 [2021-08-21 17:53:07,003 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:53:07,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:53:07,003 INFO L82 PathProgramCache]: Analyzing trace with hash -294825918, now seen corresponding path program 21 times [2021-08-21 17:53:07,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:53:07,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834653619] [2021-08-21 17:53:07,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:53:07,003 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:53:07,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:53:07,476 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:53:07,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:53:07,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834653619] [2021-08-21 17:53:07,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834653619] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:53:07,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942844530] [2021-08-21 17:53:07,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:53:07,477 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:53:07,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:53:07,478 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:53:07,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-21 17:53:08,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 17:53:08,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:53:08,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-21 17:53:08,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:53:09,210 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:53:09,210 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 73 treesize of output 64 [2021-08-21 17:53:10,241 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:53:10,241 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 63 treesize of output 56 [2021-08-21 17:53:10,244 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 47 treesize of output 37 [2021-08-21 17:53:10,313 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:53:10,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942844530] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:53:10,314 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:53:10,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 38 [2021-08-21 17:53:10,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293821827] [2021-08-21 17:53:10,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-21 17:53:10,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:53:10,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-21 17:53:10,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1299, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 17:53:10,315 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 38 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 38 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:11,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:53:11,394 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2021-08-21 17:53:11,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 17:53:11,395 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 38 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-21 17:53:11,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:53:11,395 INFO L225 Difference]: With dead ends: 43 [2021-08-21 17:53:11,395 INFO L226 Difference]: Without dead ends: 35 [2021-08-21 17:53:11,396 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 1561.6ms TimeCoverageRelationStatistics Valid=270, Invalid=2382, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 17:53:11,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-08-21 17:53:11,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-08-21 17:53:11,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:11,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2021-08-21 17:53:11,397 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 34 [2021-08-21 17:53:11,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:53:11,397 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2021-08-21 17:53:11,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 38 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:11,397 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2021-08-21 17:53:11,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 17:53:11,397 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:53:11,397 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:53:11,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-21 17:53:11,598 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,SelfDestructingSolverStorable33 [2021-08-21 17:53:11,598 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:53:11,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:53:11,598 INFO L82 PathProgramCache]: Analyzing trace with hash -983735068, now seen corresponding path program 22 times [2021-08-21 17:53:11,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:53:11,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921892395] [2021-08-21 17:53:11,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:53:11,598 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:53:11,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:53:12,057 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:53:12,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:53:12,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921892395] [2021-08-21 17:53:12,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921892395] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:53:12,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738915493] [2021-08-21 17:53:12,057 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:53:12,057 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:53:12,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:53:12,058 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:53:12,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-21 17:53:13,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:53:13,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:53:13,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-21 17:53:13,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:53:13,765 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:53:13,765 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 28 treesize of output 27 [2021-08-21 17:53:14,160 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:53:14,160 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 73 treesize of output 64 [2021-08-21 17:53:14,236 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:53:14,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738915493] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:53:14,237 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:53:14,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 38 [2021-08-21 17:53:14,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613038007] [2021-08-21 17:53:14,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-21 17:53:14,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:53:14,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-21 17:53:14,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1293, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 17:53:14,238 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 38 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 38 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:14,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:53:14,900 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2021-08-21 17:53:14,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 17:53:14,900 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 38 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-21 17:53:14,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:53:14,900 INFO L225 Difference]: With dead ends: 36 [2021-08-21 17:53:14,900 INFO L226 Difference]: Without dead ends: 36 [2021-08-21 17:53:14,901 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1150.5ms TimeCoverageRelationStatistics Valid=278, Invalid=2374, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 17:53:14,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-08-21 17:53:14,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-08-21 17:53:14,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:14,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-08-21 17:53:14,902 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 34 [2021-08-21 17:53:14,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:53:14,902 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-08-21 17:53:14,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 38 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:14,902 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-08-21 17:53:14,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 17:53:14,903 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:53:14,903 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:53:14,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-21 17:53:15,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-08-21 17:53:15,105 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:53:15,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:53:15,105 INFO L82 PathProgramCache]: Analyzing trace with hash -657392421, now seen corresponding path program 23 times [2021-08-21 17:53:15,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:53:15,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446765081] [2021-08-21 17:53:15,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:53:15,106 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:53:15,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:53:15,894 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:53:15,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:53:15,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446765081] [2021-08-21 17:53:15,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446765081] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:53:15,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060966382] [2021-08-21 17:53:15,895 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:53:15,895 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:53:15,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:53:15,896 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:53:15,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-21 17:53:17,263 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 17:53:17,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:53:17,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 54 conjunts are in the unsatisfiable core [2021-08-21 17:53:17,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:53:18,621 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:53:18,621 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 114 treesize of output 101 [2021-08-21 17:53:21,153 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:53:21,153 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 161 treesize of output 146 [2021-08-21 17:53:21,160 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 143 treesize of output 125 [2021-08-21 17:53:21,903 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:53:21,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060966382] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:53:21,903 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:53:21,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 44 [2021-08-21 17:53:21,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924165735] [2021-08-21 17:53:21,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-21 17:53:21,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:53:21,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-21 17:53:21,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1787, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 17:53:21,905 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 44 states, 44 states have (on average 1.3636363636363635) internal successors, (60), 44 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:27,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:53:27,077 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2021-08-21 17:53:27,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 17:53:27,077 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.3636363636363635) internal successors, (60), 44 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 17:53:27,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:53:27,077 INFO L225 Difference]: With dead ends: 89 [2021-08-21 17:53:27,078 INFO L226 Difference]: Without dead ends: 64 [2021-08-21 17:53:27,078 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 5770.6ms TimeCoverageRelationStatistics Valid=478, Invalid=4634, Unknown=0, NotChecked=0, Total=5112 [2021-08-21 17:53:27,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-21 17:53:27,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 50. [2021-08-21 17:53:27,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:27,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2021-08-21 17:53:27,079 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 35 [2021-08-21 17:53:27,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:53:27,080 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2021-08-21 17:53:27,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.3636363636363635) internal successors, (60), 44 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:27,080 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2021-08-21 17:53:27,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 17:53:27,080 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:53:27,080 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:53:27,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-21 17:53:27,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:53:27,281 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:53:27,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:53:27,281 INFO L82 PathProgramCache]: Analyzing trace with hash -229540797, now seen corresponding path program 24 times [2021-08-21 17:53:27,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:53:27,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358517007] [2021-08-21 17:53:27,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:53:27,281 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:53:27,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:53:27,791 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:53:27,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:53:27,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358517007] [2021-08-21 17:53:27,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358517007] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:53:27,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609843041] [2021-08-21 17:53:27,791 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:53:27,792 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:53:27,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:53:27,792 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:53:27,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-21 17:53:29,289 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 17:53:29,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:53:29,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 17:53:29,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:53:29,743 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:53:29,744 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 61 treesize of output 54 [2021-08-21 17:53:30,708 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:53:30,708 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 91 treesize of output 80 [2021-08-21 17:53:30,712 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 69 treesize of output 55 [2021-08-21 17:53:31,004 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:53:31,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609843041] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:53:31,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:53:31,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 44 [2021-08-21 17:53:31,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345513845] [2021-08-21 17:53:31,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-21 17:53:31,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:53:31,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-21 17:53:31,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1772, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 17:53:31,009 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 44 states, 44 states have (on average 1.4090909090909092) internal successors, (62), 44 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:32,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:53:32,433 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2021-08-21 17:53:32,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 17:53:32,434 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.4090909090909092) internal successors, (62), 44 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 36 [2021-08-21 17:53:32,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:53:32,434 INFO L225 Difference]: With dead ends: 70 [2021-08-21 17:53:32,434 INFO L226 Difference]: Without dead ends: 65 [2021-08-21 17:53:32,434 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1830.0ms TimeCoverageRelationStatistics Valid=309, Invalid=3231, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 17:53:32,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-08-21 17:53:32,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 41. [2021-08-21 17:53:32,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.1) internal successors, (44), 40 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:32,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2021-08-21 17:53:32,435 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 36 [2021-08-21 17:53:32,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:53:32,435 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2021-08-21 17:53:32,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.4090909090909092) internal successors, (62), 44 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:32,436 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2021-08-21 17:53:32,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 17:53:32,436 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:53:32,436 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:53:32,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-21 17:53:32,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-21 17:53:32,637 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:53:32,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:53:32,637 INFO L82 PathProgramCache]: Analyzing trace with hash 335236637, now seen corresponding path program 25 times [2021-08-21 17:53:32,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:53:32,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625742125] [2021-08-21 17:53:32,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:53:32,637 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:53:32,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:53:33,258 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 8 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:53:33,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:53:33,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625742125] [2021-08-21 17:53:33,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625742125] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:53:33,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82675290] [2021-08-21 17:53:33,259 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:53:33,259 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:53:33,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:53:33,260 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:53:33,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-21 17:53:34,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:53:34,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 17:53:34,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:53:36,131 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:53:36,131 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 67 treesize of output 62 [2021-08-21 17:53:37,246 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:53:37,246 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 54 treesize of output 51 [2021-08-21 17:53:37,249 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 48 treesize of output 42 [2021-08-21 17:53:37,348 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 7 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:53:37,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82675290] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:53:37,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:53:37,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 43 [2021-08-21 17:53:37,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861614319] [2021-08-21 17:53:37,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-21 17:53:37,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:53:37,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-21 17:53:37,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1693, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 17:53:37,350 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 43 states, 43 states have (on average 1.4883720930232558) internal successors, (64), 43 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:39,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:53:39,497 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2021-08-21 17:53:39,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 17:53:39,499 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.4883720930232558) internal successors, (64), 43 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 [2021-08-21 17:53:39,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:53:39,499 INFO L225 Difference]: With dead ends: 57 [2021-08-21 17:53:39,499 INFO L226 Difference]: Without dead ends: 38 [2021-08-21 17:53:39,500 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 2826.1ms TimeCoverageRelationStatistics Valid=323, Invalid=3337, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 17:53:39,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-08-21 17:53:39,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-08-21 17:53:39,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:39,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2021-08-21 17:53:39,501 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 37 [2021-08-21 17:53:39,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:53:39,501 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2021-08-21 17:53:39,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.4883720930232558) internal successors, (64), 43 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:39,501 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2021-08-21 17:53:39,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 17:53:39,501 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:53:39,501 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:53:39,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-21 17:53:39,702 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,SelfDestructingSolverStorable37 [2021-08-21 17:53:39,702 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:53:39,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:53:39,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1247793500, now seen corresponding path program 26 times [2021-08-21 17:53:39,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:53:39,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104036927] [2021-08-21 17:53:39,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:53:39,703 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:53:39,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:53:40,204 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 7 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:53:40,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:53:40,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104036927] [2021-08-21 17:53:40,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104036927] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:53:40,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213738509] [2021-08-21 17:53:40,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:53:40,204 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:53:40,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:53:40,205 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:53:40,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-21 17:53:41,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:53:41,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:53:41,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 17:53:41,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:53:42,313 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:53:42,314 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 73 treesize of output 64 [2021-08-21 17:53:43,341 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:53:43,341 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 61 treesize of output 54 [2021-08-21 17:53:43,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2021-08-21 17:53:43,412 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 7 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:53:43,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213738509] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:53:43,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:53:43,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 43 [2021-08-21 17:53:43,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440972233] [2021-08-21 17:53:43,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-21 17:53:43,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:53:43,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-21 17:53:43,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 17:53:43,413 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 43 states, 43 states have (on average 1.4883720930232558) internal successors, (64), 43 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:44,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:53:44,635 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2021-08-21 17:53:44,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 17:53:44,636 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.4883720930232558) internal successors, (64), 43 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 [2021-08-21 17:53:44,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:53:44,636 INFO L225 Difference]: With dead ends: 48 [2021-08-21 17:53:44,636 INFO L226 Difference]: Without dead ends: 39 [2021-08-21 17:53:44,637 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 1798.0ms TimeCoverageRelationStatistics Valid=310, Invalid=3112, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 17:53:44,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-08-21 17:53:44,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-08-21 17:53:44,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:44,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2021-08-21 17:53:44,638 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 37 [2021-08-21 17:53:44,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:53:44,638 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2021-08-21 17:53:44,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.4883720930232558) internal successors, (64), 43 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:44,638 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2021-08-21 17:53:44,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 17:53:44,638 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:53:44,638 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:53:44,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-21 17:53:44,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-21 17:53:44,839 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:53:44,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:53:44,839 INFO L82 PathProgramCache]: Analyzing trace with hash -816213115, now seen corresponding path program 27 times [2021-08-21 17:53:44,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:53:44,839 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039491218] [2021-08-21 17:53:44,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:53:44,839 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:53:44,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:53:45,916 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:53:45,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:53:45,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039491218] [2021-08-21 17:53:45,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039491218] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:53:45,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816028518] [2021-08-21 17:53:45,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:53:45,917 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:53:45,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:53:45,923 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:53:45,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-21 17:53:47,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 17:53:47,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:53:47,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 60 conjunts are in the unsatisfiable core [2021-08-21 17:53:47,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:53:49,183 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:53:49,184 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 114 treesize of output 101 [2021-08-21 17:53:52,140 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:53:52,140 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 163 treesize of output 148 [2021-08-21 17:53:52,146 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 145 treesize of output 127 [2021-08-21 17:53:52,826 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:53:52,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816028518] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:53:52,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:53:52,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 49 [2021-08-21 17:53:52,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884801004] [2021-08-21 17:53:52,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-08-21 17:53:52,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:53:52,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-08-21 17:53:52,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=2234, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 17:53:52,827 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 49 states, 49 states have (on average 1.3265306122448979) internal successors, (65), 49 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:00,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:54:00,271 INFO L93 Difference]: Finished difference Result 96 states and 102 transitions. [2021-08-21 17:54:00,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 17:54:00,271 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.3265306122448979) internal successors, (65), 49 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 17:54:00,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:54:00,272 INFO L225 Difference]: With dead ends: 96 [2021-08-21 17:54:00,272 INFO L226 Difference]: Without dead ends: 70 [2021-08-21 17:54:00,272 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 8273.5ms TimeCoverageRelationStatistics Valid=531, Invalid=5789, Unknown=0, NotChecked=0, Total=6320 [2021-08-21 17:54:00,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-08-21 17:54:00,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 54. [2021-08-21 17:54:00,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 53 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:00,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2021-08-21 17:54:00,274 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 38 [2021-08-21 17:54:00,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:54:00,274 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2021-08-21 17:54:00,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.3265306122448979) internal successors, (65), 49 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:00,275 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2021-08-21 17:54:00,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 17:54:00,275 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:54:00,275 INFO L512 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:54:00,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-21 17:54:00,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-21 17:54:00,481 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:54:00,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:54:00,481 INFO L82 PathProgramCache]: Analyzing trace with hash 2143550237, now seen corresponding path program 28 times [2021-08-21 17:54:00,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:54:00,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199413815] [2021-08-21 17:54:00,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:54:00,482 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:54:00,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:54:01,137 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:54:01,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:54:01,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199413815] [2021-08-21 17:54:01,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199413815] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:54:01,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512416717] [2021-08-21 17:54:01,138 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:54:01,138 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:54:01,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:54:01,138 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:54:01,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-21 17:54:03,013 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:54:03,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:54:03,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 17:54:03,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:54:03,558 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:54:03,559 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 61 treesize of output 54 [2021-08-21 17:54:04,779 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:54:04,780 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 99 treesize of output 86 [2021-08-21 17:54:04,782 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 75 treesize of output 59 [2021-08-21 17:54:05,026 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:54:05,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512416717] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:54:05,026 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:54:05,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 49 [2021-08-21 17:54:05,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994764787] [2021-08-21 17:54:05,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-08-21 17:54:05,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:54:05,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-08-21 17:54:05,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2218, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 17:54:05,028 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 49 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 49 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:06,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:54:06,683 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2021-08-21 17:54:06,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 17:54:06,683 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 49 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 17:54:06,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:54:06,683 INFO L225 Difference]: With dead ends: 75 [2021-08-21 17:54:06,683 INFO L226 Difference]: Without dead ends: 70 [2021-08-21 17:54:06,684 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 2266.2ms TimeCoverageRelationStatistics Valid=346, Invalid=4076, Unknown=0, NotChecked=0, Total=4422 [2021-08-21 17:54:06,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-08-21 17:54:06,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 44. [2021-08-21 17:54:06,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:06,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2021-08-21 17:54:06,685 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 39 [2021-08-21 17:54:06,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:54:06,685 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2021-08-21 17:54:06,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 49 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:06,686 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2021-08-21 17:54:06,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-21 17:54:06,686 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:54:06,686 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:54:06,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-21 17:54:06,886 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,SelfDestructingSolverStorable40 [2021-08-21 17:54:06,887 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:54:06,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:54:06,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1005354563, now seen corresponding path program 29 times [2021-08-21 17:54:06,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:54:06,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988516427] [2021-08-21 17:54:06,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:54:06,887 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:54:06,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:54:07,595 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 9 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:54:07,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:54:07,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988516427] [2021-08-21 17:54:07,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988516427] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:54:07,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129710337] [2021-08-21 17:54:07,596 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:54:07,596 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:54:07,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:54:07,597 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:54:07,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-21 17:54:09,532 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 17:54:09,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:54:09,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 54 conjunts are in the unsatisfiable core [2021-08-21 17:54:09,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:54:10,269 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:54:10,270 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 35 treesize of output 34 [2021-08-21 17:54:10,973 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:54:10,974 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 30 treesize of output 29 [2021-08-21 17:54:10,977 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 26 treesize of output 22 [2021-08-21 17:54:11,046 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 8 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:54:11,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129710337] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:54:11,046 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:54:11,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 48 [2021-08-21 17:54:11,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929661130] [2021-08-21 17:54:11,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-08-21 17:54:11,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:54:11,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-08-21 17:54:11,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=2129, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 17:54:11,048 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 48 states, 48 states have (on average 1.4375) internal successors, (69), 48 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:13,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:54:13,095 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2021-08-21 17:54:13,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 17:54:13,100 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.4375) internal successors, (69), 48 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 40 [2021-08-21 17:54:13,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:54:13,100 INFO L225 Difference]: With dead ends: 62 [2021-08-21 17:54:13,100 INFO L226 Difference]: Without dead ends: 41 [2021-08-21 17:54:13,101 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 2775.9ms TimeCoverageRelationStatistics Valid=363, Invalid=4193, Unknown=0, NotChecked=0, Total=4556 [2021-08-21 17:54:13,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-08-21 17:54:13,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-08-21 17:54:13,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.075) internal successors, (43), 40 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:13,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2021-08-21 17:54:13,102 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 40 [2021-08-21 17:54:13,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:54:13,102 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2021-08-21 17:54:13,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.4375) internal successors, (69), 48 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:13,102 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2021-08-21 17:54:13,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-21 17:54:13,102 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:54:13,103 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:54:13,126 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-08-21 17:54:13,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:54:13,305 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:54:13,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:54:13,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1799171522, now seen corresponding path program 30 times [2021-08-21 17:54:13,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:54:13,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069762860] [2021-08-21 17:54:13,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:54:13,305 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:54:13,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:54:13,885 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 8 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:54:13,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:54:13,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069762860] [2021-08-21 17:54:13,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069762860] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:54:13,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613974959] [2021-08-21 17:54:13,886 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:54:13,886 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:54:13,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:54:13,887 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:54:13,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-21 17:54:15,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 17:54:15,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:54:15,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 17:54:15,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:54:16,381 INFO L354 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2021-08-21 17:54:16,382 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 39 treesize of output 34 [2021-08-21 17:54:17,106 INFO L354 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2021-08-21 17:54:17,106 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 35 treesize of output 32 [2021-08-21 17:54:17,109 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 23 treesize of output 19 [2021-08-21 17:54:17,209 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:54:17,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613974959] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:54:17,209 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:54:17,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 49 [2021-08-21 17:54:17,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795477368] [2021-08-21 17:54:17,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-08-21 17:54:17,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:54:17,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-08-21 17:54:17,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=2226, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 17:54:17,211 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 49 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:19,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:54:19,178 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2021-08-21 17:54:19,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 17:54:19,178 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 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 40 [2021-08-21 17:54:19,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:54:19,179 INFO L225 Difference]: With dead ends: 58 [2021-08-21 17:54:19,179 INFO L226 Difference]: Without dead ends: 42 [2021-08-21 17:54:19,179 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 2433.9ms TimeCoverageRelationStatistics Valid=343, Invalid=4213, Unknown=0, NotChecked=0, Total=4556 [2021-08-21 17:54:19,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-08-21 17:54:19,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-08-21 17:54:19,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:19,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2021-08-21 17:54:19,181 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 40 [2021-08-21 17:54:19,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:54:19,181 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2021-08-21 17:54:19,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:19,181 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2021-08-21 17:54:19,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 17:54:19,182 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:54:19,182 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:54:19,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-08-21 17:54:19,392 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,SelfDestructingSolverStorable42 [2021-08-21 17:54:19,393 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:54:19,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:54:19,393 INFO L82 PathProgramCache]: Analyzing trace with hash 2069585883, now seen corresponding path program 31 times [2021-08-21 17:54:19,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:54:19,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003329808] [2021-08-21 17:54:19,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:54:19,393 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:54:19,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:54:20,555 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:54:20,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:54:20,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003329808] [2021-08-21 17:54:20,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003329808] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:54:20,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463125947] [2021-08-21 17:54:20,556 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:54:20,556 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:54:20,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:54:20,559 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:54:20,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-21 17:54:22,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:54:22,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-21 17:54:22,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:54:24,311 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:54:24,311 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 100 treesize of output 87 [2021-08-21 17:54:26,799 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:54:26,800 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 147 treesize of output 130 [2021-08-21 17:54:26,808 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 127 treesize of output 107 [2021-08-21 17:54:27,432 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:54:27,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463125947] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:54:27,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:54:27,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 54 [2021-08-21 17:54:27,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183160170] [2021-08-21 17:54:27,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-08-21 17:54:27,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:54:27,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-08-21 17:54:27,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=2732, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 17:54:27,434 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 54 states, 54 states have (on average 1.2962962962962963) internal successors, (70), 54 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) [2021-08-21 17:54:34,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:54:34,236 INFO L93 Difference]: Finished difference Result 103 states and 108 transitions. [2021-08-21 17:54:34,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 17:54:34,237 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.2962962962962963) internal successors, (70), 54 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 41 [2021-08-21 17:54:34,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:54:34,237 INFO L225 Difference]: With dead ends: 103 [2021-08-21 17:54:34,237 INFO L226 Difference]: Without dead ends: 93 [2021-08-21 17:54:34,238 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 7809.7ms TimeCoverageRelationStatistics Valid=563, Invalid=6919, Unknown=0, NotChecked=0, Total=7482 [2021-08-21 17:54:34,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-08-21 17:54:34,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 57. [2021-08-21 17:54:34,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 56 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:34,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2021-08-21 17:54:34,240 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 41 [2021-08-21 17:54:34,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:54:34,240 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2021-08-21 17:54:34,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.2962962962962963) internal successors, (70), 54 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) [2021-08-21 17:54:34,240 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2021-08-21 17:54:34,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 17:54:34,241 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:54:34,241 INFO L512 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:54:34,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-21 17:54:34,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:54:34,457 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:54:34,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:54:34,457 INFO L82 PathProgramCache]: Analyzing trace with hash -493723452, now seen corresponding path program 32 times [2021-08-21 17:54:34,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:54:34,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774760517] [2021-08-21 17:54:34,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:54:34,457 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:54:34,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:54:35,406 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:54:35,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:54:35,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774760517] [2021-08-21 17:54:35,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774760517] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:54:35,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573944536] [2021-08-21 17:54:35,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:54:35,407 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:54:35,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:54:35,407 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:54:35,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-21 17:54:37,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:54:37,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:54:37,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 63 conjunts are in the unsatisfiable core [2021-08-21 17:54:37,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:54:38,655 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:54:38,656 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 85 treesize of output 74 [2021-08-21 17:54:40,969 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:54:40,969 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 95 treesize of output 88 [2021-08-21 17:54:40,972 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 79 treesize of output 69 [2021-08-21 17:54:41,177 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:54:41,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573944536] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:54:41,177 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:54:41,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 54 [2021-08-21 17:54:41,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879406376] [2021-08-21 17:54:41,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-08-21 17:54:41,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:54:41,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-08-21 17:54:41,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=2733, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 17:54:41,178 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 54 states, 54 states have (on average 1.3333333333333333) internal successors, (72), 54 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:46,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:54:46,895 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2021-08-21 17:54:46,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-21 17:54:46,896 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.3333333333333333) internal successors, (72), 54 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 42 [2021-08-21 17:54:46,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:54:46,896 INFO L225 Difference]: With dead ends: 116 [2021-08-21 17:54:46,896 INFO L226 Difference]: Without dead ends: 93 [2021-08-21 17:54:46,897 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1462 ImplicationChecksByTransitivity, 6456.9ms TimeCoverageRelationStatistics Valid=601, Invalid=8519, Unknown=0, NotChecked=0, Total=9120 [2021-08-21 17:54:46,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-08-21 17:54:46,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 70. [2021-08-21 17:54:46,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 69 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) [2021-08-21 17:54:46,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 75 transitions. [2021-08-21 17:54:46,898 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 75 transitions. Word has length 42 [2021-08-21 17:54:46,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:54:46,899 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 75 transitions. [2021-08-21 17:54:46,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.3333333333333333) internal successors, (72), 54 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:46,899 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 75 transitions. [2021-08-21 17:54:46,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 17:54:46,899 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:54:46,899 INFO L512 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:54:46,925 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-08-21 17:54:47,104 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,SelfDestructingSolverStorable44 [2021-08-21 17:54:47,105 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:54:47,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:54:47,105 INFO L82 PathProgramCache]: Analyzing trace with hash 701018435, now seen corresponding path program 33 times [2021-08-21 17:54:47,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:54:47,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526523090] [2021-08-21 17:54:47,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:54:47,106 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:54:47,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:54:47,791 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:54:47,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:54:47,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526523090] [2021-08-21 17:54:47,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526523090] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:54:47,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645130773] [2021-08-21 17:54:47,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:54:47,792 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:54:47,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:54:47,793 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:54:47,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-21 17:54:50,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 17:54:50,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:54:50,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 64 conjunts are in the unsatisfiable core [2021-08-21 17:54:50,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:54:50,730 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:54:50,730 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 73 treesize of output 64 [2021-08-21 17:54:52,086 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:54:52,086 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 99 treesize of output 86 [2021-08-21 17:54:52,089 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 75 treesize of output 59 [2021-08-21 17:54:52,340 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:54:52,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645130773] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:54:52,340 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:54:52,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 54 [2021-08-21 17:54:52,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926360602] [2021-08-21 17:54:52,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-08-21 17:54:52,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:54:52,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-08-21 17:54:52,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2713, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 17:54:52,341 INFO L87 Difference]: Start difference. First operand 70 states and 75 transitions. Second operand has 54 states, 54 states have (on average 1.3333333333333333) internal successors, (72), 54 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:55,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:54:55,090 INFO L93 Difference]: Finished difference Result 97 states and 101 transitions. [2021-08-21 17:54:55,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 17:54:55,090 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.3333333333333333) internal successors, (72), 54 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 42 [2021-08-21 17:54:55,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:54:55,090 INFO L225 Difference]: With dead ends: 97 [2021-08-21 17:54:55,090 INFO L226 Difference]: Without dead ends: 76 [2021-08-21 17:54:55,091 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1267 ImplicationChecksByTransitivity, 3405.2ms TimeCoverageRelationStatistics Valid=553, Invalid=6757, Unknown=0, NotChecked=0, Total=7310 [2021-08-21 17:54:55,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-08-21 17:54:55,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 44. [2021-08-21 17:54:55,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:55,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2021-08-21 17:54:55,092 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 42 [2021-08-21 17:54:55,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:54:55,092 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2021-08-21 17:54:55,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.3333333333333333) internal successors, (72), 54 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:55,093 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2021-08-21 17:54:55,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 17:54:55,093 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:54:55,093 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:54:55,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-21 17:54:55,308 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,SelfDestructingSolverStorable45 [2021-08-21 17:54:55,309 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:54:55,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:54:55,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1676439709, now seen corresponding path program 34 times [2021-08-21 17:54:55,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:54:55,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996434187] [2021-08-21 17:54:55,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:54:55,309 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:54:55,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:54:56,153 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 10 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:54:56,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:54:56,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996434187] [2021-08-21 17:54:56,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996434187] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:54:56,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925280090] [2021-08-21 17:54:56,154 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:54:56,154 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:54:56,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:54:56,155 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:54:56,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-21 17:54:58,475 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:54:58,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:54:58,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 63 conjunts are in the unsatisfiable core [2021-08-21 17:54:58,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:55:00,155 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:55:00,156 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 67 treesize of output 62 [2021-08-21 17:55:01,586 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:55:01,586 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 54 treesize of output 51 [2021-08-21 17:55:01,588 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 48 treesize of output 42 [2021-08-21 17:55:01,689 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 9 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:55:01,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925280090] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:01,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:55:01,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 53 [2021-08-21 17:55:01,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420555361] [2021-08-21 17:55:01,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-08-21 17:55:01,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:55:01,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-08-21 17:55:01,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2615, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 17:55:01,690 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 53 states, 53 states have (on average 1.3962264150943395) internal successors, (74), 53 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:05,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:55:05,320 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2021-08-21 17:55:05,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 17:55:05,321 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.3962264150943395) internal successors, (74), 53 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 [2021-08-21 17:55:05,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:55:05,321 INFO L225 Difference]: With dead ends: 68 [2021-08-21 17:55:05,321 INFO L226 Difference]: Without dead ends: 45 [2021-08-21 17:55:05,321 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 4486.6ms TimeCoverageRelationStatistics Valid=403, Invalid=5147, Unknown=0, NotChecked=0, Total=5550 [2021-08-21 17:55:05,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-08-21 17:55:05,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-08-21 17:55:05,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:05,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-08-21 17:55:05,323 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 43 [2021-08-21 17:55:05,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:55:05,323 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-08-21 17:55:05,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.3962264150943395) internal successors, (74), 53 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:05,323 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-08-21 17:55:05,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-21 17:55:05,324 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:55:05,324 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:55:05,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-08-21 17:55:05,533 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,SelfDestructingSolverStorable46 [2021-08-21 17:55:05,533 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:55:05,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:55:05,533 INFO L82 PathProgramCache]: Analyzing trace with hash 743114757, now seen corresponding path program 35 times [2021-08-21 17:55:05,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:55:05,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613401324] [2021-08-21 17:55:05,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:55:05,534 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:55:05,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:06,849 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:55:06,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:55:06,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613401324] [2021-08-21 17:55:06,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613401324] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:06,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927773392] [2021-08-21 17:55:06,850 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:55:06,850 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:06,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:55:06,851 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:55:06,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-21 17:55:09,318 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 17:55:09,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:55:09,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 71 conjunts are in the unsatisfiable core [2021-08-21 17:55:09,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:55:11,197 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:55:11,197 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 112 treesize of output 99 [2021-08-21 17:55:14,867 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:55:14,867 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 162 treesize of output 145 [2021-08-21 17:55:14,870 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 142 treesize of output 122 [2021-08-21 17:55:15,606 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:55:15,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927773392] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:15,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:55:15,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 59 [2021-08-21 17:55:15,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446210843] [2021-08-21 17:55:15,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-08-21 17:55:15,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:55:15,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-08-21 17:55:15,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=3279, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 17:55:15,607 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 59 states, 59 states have (on average 1.271186440677966) internal successors, (75), 59 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) [2021-08-21 17:55:20,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:55:20,817 INFO L93 Difference]: Finished difference Result 95 states and 100 transitions. [2021-08-21 17:55:20,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 17:55:20,817 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.271186440677966) internal successors, (75), 59 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 44 [2021-08-21 17:55:20,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:55:20,817 INFO L225 Difference]: With dead ends: 95 [2021-08-21 17:55:20,818 INFO L226 Difference]: Without dead ends: 78 [2021-08-21 17:55:20,818 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 6648.6ms TimeCoverageRelationStatistics Valid=429, Invalid=6213, Unknown=0, NotChecked=0, Total=6642 [2021-08-21 17:55:20,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-08-21 17:55:20,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 49. [2021-08-21 17:55:20,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 48 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:20,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2021-08-21 17:55:20,820 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 44 [2021-08-21 17:55:20,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:55:20,820 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2021-08-21 17:55:20,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.271186440677966) internal successors, (75), 59 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) [2021-08-21 17:55:20,820 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2021-08-21 17:55:20,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-21 17:55:20,820 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:55:20,820 INFO L512 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:55:20,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-21 17:55:21,036 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,SelfDestructingSolverStorable47 [2021-08-21 17:55:21,037 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:55:21,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:55:21,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1363718524, now seen corresponding path program 36 times [2021-08-21 17:55:21,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:55:21,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516433216] [2021-08-21 17:55:21,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:55:21,038 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:55:21,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:22,313 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:55:22,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:55:22,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516433216] [2021-08-21 17:55:22,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516433216] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:22,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135554702] [2021-08-21 17:55:22,313 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:55:22,314 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:22,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:55:22,314 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:55:22,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-21 17:55:24,919 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 17:55:24,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:55:24,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 70 conjunts are in the unsatisfiable core [2021-08-21 17:55:24,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:55:26,815 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:55:26,815 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 69 treesize of output 64 [2021-08-21 17:55:28,259 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:55:28,259 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 86 treesize of output 77 [2021-08-21 17:55:28,261 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 74 treesize of output 62 [2021-08-21 17:55:28,515 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:55:28,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135554702] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:28,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:55:28,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 60 [2021-08-21 17:55:28,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439866792] [2021-08-21 17:55:28,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-08-21 17:55:28,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:55:28,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-08-21 17:55:28,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=3394, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 17:55:28,517 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 60 states, 60 states have (on average 1.2833333333333334) internal successors, (77), 60 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:33,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:55:33,644 INFO L93 Difference]: Finished difference Result 82 states and 86 transitions. [2021-08-21 17:55:33,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 17:55:33,644 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.2833333333333334) internal successors, (77), 60 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-21 17:55:33,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:55:33,644 INFO L225 Difference]: With dead ends: 82 [2021-08-21 17:55:33,644 INFO L226 Difference]: Without dead ends: 46 [2021-08-21 17:55:33,645 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 6262.2ms TimeCoverageRelationStatistics Valid=462, Invalid=6510, Unknown=0, NotChecked=0, Total=6972 [2021-08-21 17:55:33,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-08-21 17:55:33,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-08-21 17:55:33,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 45 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:33,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2021-08-21 17:55:33,646 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 45 [2021-08-21 17:55:33,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:55:33,646 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2021-08-21 17:55:33,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.2833333333333334) internal successors, (77), 60 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:33,646 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2021-08-21 17:55:33,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-21 17:55:33,646 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:55:33,646 INFO L512 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:55:33,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-21 17:55:33,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-08-21 17:55:33,847 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:55:33,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:55:33,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1874812317, now seen corresponding path program 37 times [2021-08-21 17:55:33,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:55:33,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820207562] [2021-08-21 17:55:33,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:55:33,848 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:55:33,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:34,775 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:55:34,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:55:34,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820207562] [2021-08-21 17:55:34,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820207562] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:34,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179686062] [2021-08-21 17:55:34,776 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:55:34,776 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:34,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:55:34,777 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:55:34,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-21 17:55:37,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:37,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 71 conjunts are in the unsatisfiable core [2021-08-21 17:55:37,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:55:38,382 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:55:38,382 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 78 treesize of output 69 [2021-08-21 17:55:40,055 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:55:40,056 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 104 treesize of output 91 [2021-08-21 17:55:40,058 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 80 treesize of output 64 [2021-08-21 17:55:40,297 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:55:40,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179686062] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:40,297 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:55:40,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 59 [2021-08-21 17:55:40,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575047224] [2021-08-21 17:55:40,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-08-21 17:55:40,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:55:40,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-08-21 17:55:40,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=3259, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 17:55:40,298 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand has 59 states, 59 states have (on average 1.305084745762712) internal successors, (77), 59 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:43,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:55:43,635 INFO L93 Difference]: Finished difference Result 78 states and 81 transitions. [2021-08-21 17:55:43,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-21 17:55:43,635 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.305084745762712) internal successors, (77), 59 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-21 17:55:43,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:55:43,635 INFO L225 Difference]: With dead ends: 78 [2021-08-21 17:55:43,636 INFO L226 Difference]: Without dead ends: 68 [2021-08-21 17:55:43,636 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1525 ImplicationChecksByTransitivity, 4345.6ms TimeCoverageRelationStatistics Valid=601, Invalid=8141, Unknown=0, NotChecked=0, Total=8742 [2021-08-21 17:55:43,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-08-21 17:55:43,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 47. [2021-08-21 17:55:43,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:43,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2021-08-21 17:55:43,638 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 45 [2021-08-21 17:55:43,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:55:43,638 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2021-08-21 17:55:43,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.305084745762712) internal successors, (77), 59 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:43,638 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2021-08-21 17:55:43,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-21 17:55:43,639 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:55:43,639 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:55:43,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-21 17:55:43,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-21 17:55:43,849 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:55:43,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:55:43,849 INFO L82 PathProgramCache]: Analyzing trace with hash 2058230594, now seen corresponding path program 38 times [2021-08-21 17:55:43,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:55:43,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300623178] [2021-08-21 17:55:43,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:55:43,849 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:55:43,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:44,741 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 10 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:55:44,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:55:44,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300623178] [2021-08-21 17:55:44,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300623178] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:44,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254789006] [2021-08-21 17:55:44,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:55:44,742 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:44,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:55:44,743 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:55:44,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-21 17:55:47,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:55:47,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:55:47,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 69 conjunts are in the unsatisfiable core [2021-08-21 17:55:47,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:55:48,252 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:55:48,253 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 73 treesize of output 64 [2021-08-21 17:55:49,717 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:55:49,717 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 54 treesize of output 49 [2021-08-21 17:55:49,719 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 40 treesize of output 32 [2021-08-21 17:55:49,791 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 10 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:55:49,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254789006] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:49,791 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:55:49,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 58 [2021-08-21 17:55:49,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023532160] [2021-08-21 17:55:49,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-08-21 17:55:49,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:55:49,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-08-21 17:55:49,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=3135, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 17:55:49,792 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 58 states, 58 states have (on average 1.3620689655172413) internal successors, (79), 58 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:51,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:55:51,958 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2021-08-21 17:55:51,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 17:55:51,958 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.3620689655172413) internal successors, (79), 58 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-08-21 17:55:51,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:55:51,959 INFO L225 Difference]: With dead ends: 60 [2021-08-21 17:55:51,959 INFO L226 Difference]: Without dead ends: 48 [2021-08-21 17:55:51,959 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 3188.9ms TimeCoverageRelationStatistics Valid=430, Invalid=5890, Unknown=0, NotChecked=0, Total=6320 [2021-08-21 17:55:51,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-08-21 17:55:51,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-08-21 17:55:51,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:51,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2021-08-21 17:55:51,960 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 46 [2021-08-21 17:55:51,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:55:51,961 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2021-08-21 17:55:51,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.3620689655172413) internal successors, (79), 58 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:51,961 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2021-08-21 17:55:51,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 17:55:51,961 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:55:51,961 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:55:51,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-21 17:55:52,172 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,SelfDestructingSolverStorable50 [2021-08-21 17:55:52,174 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:55:52,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:55:52,175 INFO L82 PathProgramCache]: Analyzing trace with hash 33854171, now seen corresponding path program 39 times [2021-08-21 17:55:52,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:55:52,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333063691] [2021-08-21 17:55:52,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:55:52,175 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:55:52,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:53,452 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:55:53,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:55:53,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333063691] [2021-08-21 17:55:53,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333063691] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:53,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250992130] [2021-08-21 17:55:53,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:55:53,452 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:53,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:55:53,453 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:55:53,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-21 17:55:56,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 17:55:56,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:55:56,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 75 conjunts are in the unsatisfiable core [2021-08-21 17:55:56,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:55:57,955 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:55:57,955 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 101 treesize of output 88 [2021-08-21 17:56:00,942 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:56:00,943 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 146 treesize of output 129 [2021-08-21 17:56:00,945 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 120 treesize of output 100 [2021-08-21 17:56:01,525 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:56:01,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250992130] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:56:01,525 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:56:01,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 64 [2021-08-21 17:56:01,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137219686] [2021-08-21 17:56:01,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-08-21 17:56:01,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:56:01,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-08-21 17:56:01,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=3876, Unknown=0, NotChecked=0, Total=4032 [2021-08-21 17:56:01,526 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 64 states, 64 states have (on average 1.25) internal successors, (80), 64 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:10,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:56:10,579 INFO L93 Difference]: Finished difference Result 115 states and 120 transitions. [2021-08-21 17:56:10,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-21 17:56:10,579 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.25) internal successors, (80), 64 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 17:56:10,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:56:10,580 INFO L225 Difference]: With dead ends: 115 [2021-08-21 17:56:10,580 INFO L226 Difference]: Without dead ends: 105 [2021-08-21 17:56:10,580 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1507 ImplicationChecksByTransitivity, 10163.7ms TimeCoverageRelationStatistics Valid=669, Invalid=9837, Unknown=0, NotChecked=0, Total=10506 [2021-08-21 17:56:10,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-08-21 17:56:10,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 65. [2021-08-21 17:56:10,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.078125) internal successors, (69), 64 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:10,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2021-08-21 17:56:10,582 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 47 [2021-08-21 17:56:10,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:56:10,583 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2021-08-21 17:56:10,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.25) internal successors, (80), 64 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:10,583 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2021-08-21 17:56:10,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-21 17:56:10,583 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:56:10,583 INFO L512 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:56:10,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-21 17:56:10,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:56:10,799 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:56:10,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:56:10,799 INFO L82 PathProgramCache]: Analyzing trace with hash 823102916, now seen corresponding path program 40 times [2021-08-21 17:56:10,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:56:10,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167379744] [2021-08-21 17:56:10,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:56:10,800 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:56:10,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:56:12,140 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:56:12,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:56:12,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167379744] [2021-08-21 17:56:12,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167379744] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:56:12,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266411262] [2021-08-21 17:56:12,141 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:56:12,141 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:56:12,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:56:12,142 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:56:12,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-21 17:56:15,163 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:56:15,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:56:15,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 77 conjunts are in the unsatisfiable core [2021-08-21 17:56:15,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:56:17,231 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:56:17,231 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 112 treesize of output 99 [2021-08-21 17:56:20,827 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:56:20,827 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 121 treesize of output 110 [2021-08-21 17:56:20,830 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 107 treesize of output 93 [2021-08-21 17:56:21,145 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:56:21,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266411262] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:56:21,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:56:21,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 64 [2021-08-21 17:56:21,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873958663] [2021-08-21 17:56:21,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-08-21 17:56:21,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:56:21,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-08-21 17:56:21,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=3878, Unknown=0, NotChecked=0, Total=4032 [2021-08-21 17:56:21,146 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 64 states, 64 states have (on average 1.28125) internal successors, (82), 64 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:27,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:56:27,475 INFO L93 Difference]: Finished difference Result 103 states and 108 transitions. [2021-08-21 17:56:27,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 17:56:27,476 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.28125) internal successors, (82), 64 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-21 17:56:27,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:56:27,476 INFO L225 Difference]: With dead ends: 103 [2021-08-21 17:56:27,476 INFO L226 Difference]: Without dead ends: 84 [2021-08-21 17:56:27,477 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 928 ImplicationChecksByTransitivity, 7587.3ms TimeCoverageRelationStatistics Valid=493, Invalid=7517, Unknown=0, NotChecked=0, Total=8010 [2021-08-21 17:56:27,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-08-21 17:56:27,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2021-08-21 17:56:27,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 65 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) [2021-08-21 17:56:27,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2021-08-21 17:56:27,478 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 48 [2021-08-21 17:56:27,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:56:27,479 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2021-08-21 17:56:27,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.28125) internal successors, (82), 64 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:27,479 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2021-08-21 17:56:27,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-21 17:56:27,479 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:56:27,479 INFO L512 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:56:27,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-08-21 17:56:27,688 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,SelfDestructingSolverStorable52 [2021-08-21 17:56:27,689 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:56:27,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:56:27,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1057409469, now seen corresponding path program 41 times [2021-08-21 17:56:27,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:56:27,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405945195] [2021-08-21 17:56:27,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:56:27,689 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:56:27,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:56:29,009 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:56:29,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:56:29,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405945195] [2021-08-21 17:56:29,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405945195] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:56:29,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138218351] [2021-08-21 17:56:29,010 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:56:29,010 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:56:29,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:56:29,011 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:56:29,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-21 17:56:32,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 17:56:32,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:56:32,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 75 conjunts are in the unsatisfiable core [2021-08-21 17:56:32,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:56:33,045 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:56:33,045 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 61 treesize of output 54 [2021-08-21 17:56:34,595 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:56:34,595 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 91 treesize of output 80 [2021-08-21 17:56:34,598 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 69 treesize of output 55 [2021-08-21 17:56:34,854 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:56:34,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138218351] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:56:34,854 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:56:34,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 64 [2021-08-21 17:56:34,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124568485] [2021-08-21 17:56:34,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-08-21 17:56:34,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:56:34,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-08-21 17:56:34,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=3856, Unknown=0, NotChecked=0, Total=4032 [2021-08-21 17:56:34,855 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 64 states, 64 states have (on average 1.28125) internal successors, (82), 64 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:39,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:56:39,837 INFO L93 Difference]: Finished difference Result 117 states and 122 transitions. [2021-08-21 17:56:39,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-21 17:56:39,837 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.28125) internal successors, (82), 64 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-21 17:56:39,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:56:39,838 INFO L225 Difference]: With dead ends: 117 [2021-08-21 17:56:39,838 INFO L226 Difference]: Without dead ends: 107 [2021-08-21 17:56:39,838 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 6048.6ms TimeCoverageRelationStatistics Valid=651, Invalid=9651, Unknown=0, NotChecked=0, Total=10302 [2021-08-21 17:56:39,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-08-21 17:56:39,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 53. [2021-08-21 17:56:39,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 52 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:39,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2021-08-21 17:56:39,840 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 48 [2021-08-21 17:56:39,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:56:39,840 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2021-08-21 17:56:39,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.28125) internal successors, (82), 64 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:39,840 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2021-08-21 17:56:39,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-21 17:56:39,840 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:56:39,840 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:56:39,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-08-21 17:56:40,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:56:40,053 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:56:40,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:56:40,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1017545501, now seen corresponding path program 42 times [2021-08-21 17:56:40,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:56:40,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549181493] [2021-08-21 17:56:40,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:56:40,054 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:56:40,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:56:41,221 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 12 proven. 175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:56:41,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:56:41,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549181493] [2021-08-21 17:56:41,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549181493] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:56:41,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383583304] [2021-08-21 17:56:41,221 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:56:41,221 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:56:41,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:56:41,222 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:56:41,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-21 17:56:44,534 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 17:56:44,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:56:44,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 72 conjunts are in the unsatisfiable core [2021-08-21 17:56:44,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:56:45,637 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:56:45,637 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 35 treesize of output 34 [2021-08-21 17:56:46,703 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:56:46,703 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 30 treesize of output 29 [2021-08-21 17:56:46,705 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 26 treesize of output 22 [2021-08-21 17:56:46,789 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 11 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:56:46,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383583304] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:56:46,789 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:56:46,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 63 [2021-08-21 17:56:46,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870528905] [2021-08-21 17:56:46,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-08-21 17:56:46,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:56:46,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-08-21 17:56:46,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=3737, Unknown=0, NotChecked=0, Total=3906 [2021-08-21 17:56:46,790 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand has 63 states, 63 states have (on average 1.3333333333333333) internal successors, (84), 63 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:50,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:56:50,340 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2021-08-21 17:56:50,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 17:56:50,340 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.3333333333333333) internal successors, (84), 63 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have 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 [2021-08-21 17:56:50,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:56:50,340 INFO L225 Difference]: With dead ends: 77 [2021-08-21 17:56:50,340 INFO L226 Difference]: Without dead ends: 50 [2021-08-21 17:56:50,341 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 4709.9ms TimeCoverageRelationStatistics Valid=483, Invalid=7349, Unknown=0, NotChecked=0, Total=7832 [2021-08-21 17:56:50,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-08-21 17:56:50,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-08-21 17:56:50,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 49 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:50,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2021-08-21 17:56:50,342 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 49 [2021-08-21 17:56:50,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:56:50,343 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2021-08-21 17:56:50,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.3333333333333333) internal successors, (84), 63 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:50,343 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2021-08-21 17:56:50,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-21 17:56:50,343 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:56:50,343 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:56:50,371 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-08-21 17:56:50,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:56:50,545 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:56:50,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:56:50,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1353668444, now seen corresponding path program 43 times [2021-08-21 17:56:50,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:56:50,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967409957] [2021-08-21 17:56:50,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:56:50,545 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:56:50,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:56:51,583 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 11 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:56:51,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:56:51,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967409957] [2021-08-21 17:56:51,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967409957] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:56:51,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565290142] [2021-08-21 17:56:51,584 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:56:51,584 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:56:51,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:56:51,586 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:56:51,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-21 17:56:54,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:56:54,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 75 conjunts are in the unsatisfiable core [2021-08-21 17:56:54,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:56:55,828 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:56:55,828 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 73 treesize of output 64 [2021-08-21 17:56:57,578 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:56:57,578 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 54 treesize of output 49 [2021-08-21 17:56:57,584 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 40 treesize of output 32 [2021-08-21 17:56:57,662 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 11 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:56:57,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565290142] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:56:57,663 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:56:57,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 63 [2021-08-21 17:56:57,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132402908] [2021-08-21 17:56:57,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-08-21 17:56:57,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:56:57,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-08-21 17:56:57,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=3719, Unknown=0, NotChecked=0, Total=3906 [2021-08-21 17:56:57,664 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand has 63 states, 63 states have (on average 1.3333333333333333) internal successors, (84), 63 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:00,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:57:00,024 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2021-08-21 17:57:00,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 17:57:00,025 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.3333333333333333) internal successors, (84), 63 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have 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 [2021-08-21 17:57:00,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:57:00,025 INFO L225 Difference]: With dead ends: 64 [2021-08-21 17:57:00,025 INFO L226 Difference]: Without dead ends: 51 [2021-08-21 17:57:00,025 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1135 ImplicationChecksByTransitivity, 3704.2ms TimeCoverageRelationStatistics Valid=470, Invalid=7012, Unknown=0, NotChecked=0, Total=7482 [2021-08-21 17:57:00,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-08-21 17:57:00,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-08-21 17:57:00,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.06) internal successors, (53), 50 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:00,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2021-08-21 17:57:00,027 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 49 [2021-08-21 17:57:00,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:57:00,027 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2021-08-21 17:57:00,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.3333333333333333) internal successors, (84), 63 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:00,027 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2021-08-21 17:57:00,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-21 17:57:00,027 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:57:00,027 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:57:00,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-08-21 17:57:00,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-08-21 17:57:00,228 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:57:00,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:57:00,228 INFO L82 PathProgramCache]: Analyzing trace with hash 285207685, now seen corresponding path program 44 times [2021-08-21 17:57:00,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:57:00,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565871056] [2021-08-21 17:57:00,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:57:00,228 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:57:00,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:57:01,677 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:57:01,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:57:01,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565871056] [2021-08-21 17:57:01,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565871056] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:01,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770455300] [2021-08-21 17:57:01,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:57:01,677 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:01,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:57:01,678 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:57:01,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-21 17:57:05,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:57:05,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:57:05,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 83 conjunts are in the unsatisfiable core [2021-08-21 17:57:05,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:57:07,350 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:57:07,351 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 112 treesize of output 99 [2021-08-21 17:57:11,744 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:57:11,744 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 154 treesize of output 139 [2021-08-21 17:57:11,748 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 136 treesize of output 118 [2021-08-21 17:57:12,489 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:57:12,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770455300] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:12,489 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:57:12,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 69 [2021-08-21 17:57:12,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187876357] [2021-08-21 17:57:12,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-08-21 17:57:12,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:57:12,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-08-21 17:57:12,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=4523, Unknown=0, NotChecked=0, Total=4692 [2021-08-21 17:57:12,490 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand has 69 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 69 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:21,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:57:21,451 INFO L93 Difference]: Finished difference Result 113 states and 118 transitions. [2021-08-21 17:57:21,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 17:57:21,452 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 69 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-08-21 17:57:21,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:57:21,452 INFO L225 Difference]: With dead ends: 113 [2021-08-21 17:57:21,452 INFO L226 Difference]: Without dead ends: 88 [2021-08-21 17:57:21,453 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 10479.3ms TimeCoverageRelationStatistics Valid=537, Invalid=8775, Unknown=0, NotChecked=0, Total=9312 [2021-08-21 17:57:21,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-08-21 17:57:21,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 55. [2021-08-21 17:57:21,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:21,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2021-08-21 17:57:21,454 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 50 [2021-08-21 17:57:21,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:57:21,454 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2021-08-21 17:57:21,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 69 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:21,454 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2021-08-21 17:57:21,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-21 17:57:21,455 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:57:21,455 INFO L512 BasicCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:57:21,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-08-21 17:57:21,655 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,SelfDestructingSolverStorable56 [2021-08-21 17:57:21,656 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:57:21,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:57:21,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1522662524, now seen corresponding path program 45 times [2021-08-21 17:57:21,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:57:21,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725844088] [2021-08-21 17:57:21,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:57:21,656 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:57:21,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:57:23,129 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:57:23,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:57:23,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725844088] [2021-08-21 17:57:23,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725844088] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:23,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481800135] [2021-08-21 17:57:23,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:57:23,129 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:23,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:57:23,130 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:57:23,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-21 17:57:26,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 17:57:26,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:57:26,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 83 conjunts are in the unsatisfiable core [2021-08-21 17:57:26,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:57:28,665 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:57:28,666 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 56 treesize of output 51 [2021-08-21 17:57:30,727 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:57:30,728 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 101 treesize of output 88 [2021-08-21 17:57:30,730 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 79 treesize of output 63 [2021-08-21 17:57:31,056 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:57:31,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481800135] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:31,056 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:57:31,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 70 [2021-08-21 17:57:31,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039138143] [2021-08-21 17:57:31,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-08-21 17:57:31,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:57:31,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-08-21 17:57:31,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=4669, Unknown=0, NotChecked=0, Total=4830 [2021-08-21 17:57:31,058 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 70 states, 70 states have (on average 1.2428571428571429) internal successors, (87), 70 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) [2021-08-21 17:57:38,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:57:38,225 INFO L93 Difference]: Finished difference Result 92 states and 96 transitions. [2021-08-21 17:57:38,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 17:57:38,225 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.2428571428571429) internal successors, (87), 70 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 51 [2021-08-21 17:57:38,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:57:38,226 INFO L225 Difference]: With dead ends: 92 [2021-08-21 17:57:38,226 INFO L226 Difference]: Without dead ends: 52 [2021-08-21 17:57:38,226 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 8748.6ms TimeCoverageRelationStatistics Valid=556, Invalid=9146, Unknown=0, NotChecked=0, Total=9702 [2021-08-21 17:57:38,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-08-21 17:57:38,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-08-21 17:57:38,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 51 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:38,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2021-08-21 17:57:38,227 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 51 [2021-08-21 17:57:38,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:57:38,227 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2021-08-21 17:57:38,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.2428571428571429) internal successors, (87), 70 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) [2021-08-21 17:57:38,227 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2021-08-21 17:57:38,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-21 17:57:38,227 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:57:38,228 INFO L512 BasicCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:57:38,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-08-21 17:57:38,428 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,SelfDestructingSolverStorable57 [2021-08-21 17:57:38,428 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:57:38,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:57:38,428 INFO L82 PathProgramCache]: Analyzing trace with hash -942428131, now seen corresponding path program 46 times [2021-08-21 17:57:38,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:57:38,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008818923] [2021-08-21 17:57:38,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:57:38,429 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:57:38,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:57:39,449 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:57:39,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:57:39,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008818923] [2021-08-21 17:57:39,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008818923] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:39,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201234359] [2021-08-21 17:57:39,449 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:57:39,449 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:39,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:57:39,450 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:57:39,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-21 17:57:43,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:57:43,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:57:43,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 83 conjunts are in the unsatisfiable core [2021-08-21 17:57:43,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:57:44,310 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:57:44,310 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 78 treesize of output 69 [2021-08-21 17:57:46,284 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:57:46,285 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 103 treesize of output 90 [2021-08-21 17:57:46,287 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 79 treesize of output 63 [2021-08-21 17:57:46,541 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:57:46,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201234359] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:46,541 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:57:46,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 69 [2021-08-21 17:57:46,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822477021] [2021-08-21 17:57:46,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-08-21 17:57:46,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:57:46,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-08-21 17:57:46,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=4498, Unknown=0, NotChecked=0, Total=4692 [2021-08-21 17:57:46,543 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 69 states, 69 states have (on average 1.2608695652173914) internal successors, (87), 69 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) [2021-08-21 17:57:50,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:57:50,996 INFO L93 Difference]: Finished difference Result 86 states and 89 transitions. [2021-08-21 17:57:50,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-21 17:57:50,997 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.2608695652173914) internal successors, (87), 69 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 51 [2021-08-21 17:57:50,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:57:50,997 INFO L225 Difference]: With dead ends: 86 [2021-08-21 17:57:50,997 INFO L226 Difference]: Without dead ends: 76 [2021-08-21 17:57:50,998 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2143 ImplicationChecksByTransitivity, 5636.4ms TimeCoverageRelationStatistics Valid=707, Invalid=11283, Unknown=0, NotChecked=0, Total=11990 [2021-08-21 17:57:50,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-08-21 17:57:50,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 53. [2021-08-21 17:57:50,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:50,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2021-08-21 17:57:50,999 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 51 [2021-08-21 17:57:50,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:57:50,999 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2021-08-21 17:57:50,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.2608695652173914) internal successors, (87), 69 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) [2021-08-21 17:57:50,999 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2021-08-21 17:57:50,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-21 17:57:50,999 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:57:50,999 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:57:51,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-08-21 17:57:51,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-08-21 17:57:51,200 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:57:51,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:57:51,200 INFO L82 PathProgramCache]: Analyzing trace with hash 623122626, now seen corresponding path program 47 times [2021-08-21 17:57:51,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:57:51,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690356920] [2021-08-21 17:57:51,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:57:51,201 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:57:51,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:57:52,304 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 12 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:57:52,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:57:52,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690356920] [2021-08-21 17:57:52,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690356920] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:52,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658777378] [2021-08-21 17:57:52,305 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:57:52,305 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:52,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:57:52,305 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:57:52,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-21 17:57:56,178 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 17:57:56,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:57:56,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 81 conjunts are in the unsatisfiable core [2021-08-21 17:57:56,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:57:57,118 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:57:57,119 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 73 treesize of output 64 [2021-08-21 17:57:59,011 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:57:59,011 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 54 treesize of output 49 [2021-08-21 17:57:59,014 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 40 treesize of output 32 [2021-08-21 17:57:59,097 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 12 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:57:59,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658777378] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:59,098 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:57:59,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 68 [2021-08-21 17:57:59,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480531526] [2021-08-21 17:57:59,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-08-21 17:57:59,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:57:59,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-08-21 17:57:59,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=4353, Unknown=0, NotChecked=0, Total=4556 [2021-08-21 17:57:59,099 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand has 68 states, 68 states have (on average 1.3088235294117647) internal successors, (89), 68 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:01,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:58:01,982 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2021-08-21 17:58:01,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 17:58:01,982 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.3088235294117647) internal successors, (89), 68 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-08-21 17:58:01,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:58:01,982 INFO L225 Difference]: With dead ends: 68 [2021-08-21 17:58:01,982 INFO L226 Difference]: Without dead ends: 54 [2021-08-21 17:58:01,983 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1341 ImplicationChecksByTransitivity, 4178.3ms TimeCoverageRelationStatistics Valid=510, Invalid=8232, Unknown=0, NotChecked=0, Total=8742 [2021-08-21 17:58:01,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-08-21 17:58:01,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-08-21 17:58:01,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 53 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:01,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2021-08-21 17:58:01,984 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 52 [2021-08-21 17:58:01,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:58:01,984 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2021-08-21 17:58:01,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.3088235294117647) internal successors, (89), 68 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:01,984 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2021-08-21 17:58:01,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-21 17:58:01,985 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:58:01,985 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:58:02,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-08-21 17:58:02,185 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,SelfDestructingSolverStorable59 [2021-08-21 17:58:02,186 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:58:02,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:58:02,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1089508827, now seen corresponding path program 48 times [2021-08-21 17:58:02,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:58:02,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104001375] [2021-08-21 17:58:02,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:58:02,186 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:58:02,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:03,957 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:03,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:58:03,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104001375] [2021-08-21 17:58:03,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104001375] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:03,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820634006] [2021-08-21 17:58:03,958 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:58:03,958 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:03,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:58:03,959 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:58:03,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-21 17:58:07,950 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 17:58:07,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:58:07,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 91 conjunts are in the unsatisfiable core [2021-08-21 17:58:07,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:58:09,921 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:58:09,921 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 89 treesize of output 78 [2021-08-21 17:58:13,338 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:58:13,338 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 128 treesize of output 113 [2021-08-21 17:58:13,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 86 [2021-08-21 17:58:13,969 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:13,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820634006] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:13,970 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:58:13,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 74 [2021-08-21 17:58:13,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537026252] [2021-08-21 17:58:13,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-08-21 17:58:13,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:58:13,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-08-21 17:58:13,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=5219, Unknown=0, NotChecked=0, Total=5402 [2021-08-21 17:58:13,971 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 74 states, 74 states have (on average 1.2162162162162162) internal successors, (90), 74 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:26,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:58:26,276 INFO L93 Difference]: Finished difference Result 125 states and 130 transitions. [2021-08-21 17:58:26,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-08-21 17:58:26,277 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.2162162162162162) internal successors, (90), 74 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-08-21 17:58:26,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:58:26,277 INFO L225 Difference]: With dead ends: 125 [2021-08-21 17:58:26,277 INFO L226 Difference]: Without dead ends: 94 [2021-08-21 17:58:26,278 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1905 ImplicationChecksByTransitivity, 13947.6ms TimeCoverageRelationStatistics Valid=796, Invalid=13484, Unknown=0, NotChecked=0, Total=14280 [2021-08-21 17:58:26,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-08-21 17:58:26,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 74. [2021-08-21 17:58:26,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0684931506849316) internal successors, (78), 73 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:26,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2021-08-21 17:58:26,279 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 53 [2021-08-21 17:58:26,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:58:26,279 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2021-08-21 17:58:26,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.2162162162162162) internal successors, (90), 74 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:26,279 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2021-08-21 17:58:26,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-08-21 17:58:26,280 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:58:26,280 INFO L512 BasicCegarLoop]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:58:26,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-08-21 17:58:26,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:26,480 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:58:26,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:58:26,481 INFO L82 PathProgramCache]: Analyzing trace with hash 237439811, now seen corresponding path program 49 times [2021-08-21 17:58:26,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:58:26,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121179919] [2021-08-21 17:58:26,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:58:26,481 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:58:26,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:27,692 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:27,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:58:27,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121179919] [2021-08-21 17:58:27,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121179919] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:27,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512029851] [2021-08-21 17:58:27,693 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:58:27,693 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:27,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:58:27,697 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:58:27,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-21 17:58:31,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:31,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 89 conjunts are in the unsatisfiable core [2021-08-21 17:58:31,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:58:33,068 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:58:33,068 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 78 treesize of output 69 [2021-08-21 17:58:35,332 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:58:35,332 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 104 treesize of output 91 [2021-08-21 17:58:35,334 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 80 treesize of output 64 [2021-08-21 17:58:35,591 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:35,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512029851] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:35,591 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:58:35,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 74 [2021-08-21 17:58:35,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478936408] [2021-08-21 17:58:35,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-08-21 17:58:35,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:58:35,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-08-21 17:58:35,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=5194, Unknown=0, NotChecked=0, Total=5402 [2021-08-21 17:58:35,593 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand has 74 states, 74 states have (on average 1.2432432432432432) internal successors, (92), 74 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:40,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:58:40,552 INFO L93 Difference]: Finished difference Result 129 states and 134 transitions. [2021-08-21 17:58:40,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-21 17:58:40,553 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.2432432432432432) internal successors, (92), 74 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-08-21 17:58:40,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:58:40,553 INFO L225 Difference]: With dead ends: 129 [2021-08-21 17:58:40,553 INFO L226 Difference]: Without dead ends: 119 [2021-08-21 17:58:40,554 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2491 ImplicationChecksByTransitivity, 6309.5ms TimeCoverageRelationStatistics Valid=757, Invalid=13049, Unknown=0, NotChecked=0, Total=13806 [2021-08-21 17:58:40,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-08-21 17:58:40,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 59. [2021-08-21 17:58:40,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 58 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:40,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2021-08-21 17:58:40,556 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 54 [2021-08-21 17:58:40,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:58:40,556 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2021-08-21 17:58:40,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.2432432432432432) internal successors, (92), 74 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:40,556 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2021-08-21 17:58:40,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-21 17:58:40,556 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:58:40,556 INFO L512 BasicCegarLoop]: trace histogram [13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:58:40,586 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-08-21 17:58:40,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:40,757 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:58:40,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:58:40,757 INFO L82 PathProgramCache]: Analyzing trace with hash 709199261, now seen corresponding path program 50 times [2021-08-21 17:58:40,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:58:40,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550481247] [2021-08-21 17:58:40,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:58:40,757 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:58:40,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:42,191 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 14 proven. 246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:42,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:58:42,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550481247] [2021-08-21 17:58:42,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550481247] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:42,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681977178] [2021-08-21 17:58:42,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:58:42,192 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:42,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:58:42,192 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:58:42,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-21 17:58:46,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:58:46,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:58:46,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 87 conjunts are in the unsatisfiable core [2021-08-21 17:58:46,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:58:48,943 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:58:48,943 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 74 treesize of output 67 [2021-08-21 17:58:51,075 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:58:51,076 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 61 treesize of output 56 [2021-08-21 17:58:51,078 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 53 treesize of output 45 [2021-08-21 17:58:51,217 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 13 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:51,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681977178] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:51,217 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:58:51,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 73 [2021-08-21 17:58:51,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094630506] [2021-08-21 17:58:51,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-08-21 17:58:51,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:58:51,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-08-21 17:58:51,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=5059, Unknown=0, NotChecked=0, Total=5256 [2021-08-21 17:58:51,218 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 73 states, 73 states have (on average 1.2876712328767124) internal successors, (94), 73 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:57,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:58:57,014 INFO L93 Difference]: Finished difference Result 87 states and 90 transitions. [2021-08-21 17:58:57,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 17:58:57,014 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.2876712328767124) internal successors, (94), 73 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-21 17:58:57,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:58:57,015 INFO L225 Difference]: With dead ends: 87 [2021-08-21 17:58:57,015 INFO L226 Difference]: Without dead ends: 56 [2021-08-21 17:58:57,015 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 906 ImplicationChecksByTransitivity, 7613.4ms TimeCoverageRelationStatistics Valid=563, Invalid=9943, Unknown=0, NotChecked=0, Total=10506 [2021-08-21 17:58:57,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-08-21 17:58:57,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-08-21 17:58:57,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 55 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:57,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2021-08-21 17:58:57,016 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 55 [2021-08-21 17:58:57,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:58:57,016 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2021-08-21 17:58:57,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.2876712328767124) internal successors, (94), 73 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:57,017 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2021-08-21 17:58:57,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-21 17:58:57,017 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:58:57,017 INFO L512 BasicCegarLoop]: trace histogram [13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:58:57,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-08-21 17:58:57,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:57,220 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:58:57,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:58:57,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1455676836, now seen corresponding path program 51 times [2021-08-21 17:58:57,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:58:57,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145800770] [2021-08-21 17:58:57,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:58:57,221 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:58:57,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:58,507 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 13 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:58,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:58:58,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145800770] [2021-08-21 17:58:58,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145800770] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:58,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655080632] [2021-08-21 17:58:58,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:58:58,507 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:58,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:58:58,508 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:58:58,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-21 17:59:02,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-21 17:59:02,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:59:02,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 87 conjunts are in the unsatisfiable core [2021-08-21 17:59:02,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:59:03,915 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:59:03,915 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 73 treesize of output 64 [2021-08-21 17:59:05,931 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:59:05,932 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 54 treesize of output 49 [2021-08-21 17:59:05,934 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 40 treesize of output 32 [2021-08-21 17:59:06,018 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 13 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:06,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655080632] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:06,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:59:06,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 73 [2021-08-21 17:59:06,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410170367] [2021-08-21 17:59:06,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-08-21 17:59:06,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:59:06,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-08-21 17:59:06,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=5037, Unknown=0, NotChecked=0, Total=5256 [2021-08-21 17:59:06,019 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand has 73 states, 73 states have (on average 1.2876712328767124) internal successors, (94), 73 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:09,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:59:09,318 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2021-08-21 17:59:09,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 17:59:09,318 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.2876712328767124) internal successors, (94), 73 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-21 17:59:09,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:59:09,319 INFO L225 Difference]: With dead ends: 72 [2021-08-21 17:59:09,319 INFO L226 Difference]: Without dead ends: 57 [2021-08-21 17:59:09,320 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1564 ImplicationChecksByTransitivity, 4861.3ms TimeCoverageRelationStatistics Valid=550, Invalid=9550, Unknown=0, NotChecked=0, Total=10100 [2021-08-21 17:59:09,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-08-21 17:59:09,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-08-21 17:59:09,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 56 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:09,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2021-08-21 17:59:09,321 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 55 [2021-08-21 17:59:09,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:59:09,321 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2021-08-21 17:59:09,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.2876712328767124) internal successors, (94), 73 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:09,322 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2021-08-21 17:59:09,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 17:59:09,322 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:59:09,322 INFO L512 BasicCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:59:09,372 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-08-21 17:59:09,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:09,565 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:59:09,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:59:09,565 INFO L82 PathProgramCache]: Analyzing trace with hash -2085338875, now seen corresponding path program 52 times [2021-08-21 17:59:09,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:59:09,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374074918] [2021-08-21 17:59:09,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:59:09,565 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:59:09,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:59:11,719 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:11,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:59:11,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374074918] [2021-08-21 17:59:11,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374074918] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:11,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434219324] [2021-08-21 17:59:11,719 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:59:11,719 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:11,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:59:11,720 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:59:11,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-21 17:59:16,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:59:16,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:59:16,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 95 conjunts are in the unsatisfiable core [2021-08-21 17:59:16,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:59:19,328 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:59:19,328 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 121 treesize of output 106 [2021-08-21 17:59:24,120 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:59:24,120 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 150 treesize of output 135 [2021-08-21 17:59:24,123 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 132 treesize of output 114 [2021-08-21 17:59:24,849 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:24,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434219324] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:24,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:59:24,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 79 [2021-08-21 17:59:24,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083041059] [2021-08-21 17:59:24,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-08-21 17:59:24,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:59:24,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-08-21 17:59:24,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=5966, Unknown=0, NotChecked=0, Total=6162 [2021-08-21 17:59:24,851 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand has 79 states, 79 states have (on average 1.2025316455696202) internal successors, (95), 79 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:33,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:59:33,581 INFO L93 Difference]: Finished difference Result 119 states and 124 transitions. [2021-08-21 17:59:33,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 17:59:33,581 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.2025316455696202) internal successors, (95), 79 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 17:59:33,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:59:33,582 INFO L225 Difference]: With dead ends: 119 [2021-08-21 17:59:33,582 INFO L226 Difference]: Without dead ends: 98 [2021-08-21 17:59:33,582 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1527 ImplicationChecksByTransitivity, 11159.2ms TimeCoverageRelationStatistics Valid=586, Invalid=11404, Unknown=0, NotChecked=0, Total=11990 [2021-08-21 17:59:33,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-08-21 17:59:33,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2021-08-21 17:59:33,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 60 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:33,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2021-08-21 17:59:33,584 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 56 [2021-08-21 17:59:33,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:59:33,584 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2021-08-21 17:59:33,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.2025316455696202) internal successors, (95), 79 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:33,584 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2021-08-21 17:59:33,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 17:59:33,585 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:59:33,585 INFO L512 BasicCegarLoop]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:59:33,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-08-21 17:59:33,812 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,SelfDestructingSolverStorable64 [2021-08-21 17:59:33,813 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:59:33,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:59:33,813 INFO L82 PathProgramCache]: Analyzing trace with hash -130025604, now seen corresponding path program 53 times [2021-08-21 17:59:33,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:59:33,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604893176] [2021-08-21 17:59:33,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:59:33,814 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:59:33,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:59:35,507 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:35,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:59:35,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604893176] [2021-08-21 17:59:35,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604893176] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:35,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591116925] [2021-08-21 17:59:35,508 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:59:35,508 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:35,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:59:35,509 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:59:35,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-21 17:59:40,189 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-21 17:59:40,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:59:40,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 93 conjunts are in the unsatisfiable core [2021-08-21 17:59:40,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:59:43,311 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:59:43,312 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 76 treesize of output 69 [2021-08-21 17:59:46,007 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:59:46,007 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 96 treesize of output 85 [2021-08-21 17:59:46,009 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 82 treesize of output 68 [2021-08-21 17:59:46,331 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:46,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591116925] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:46,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:59:46,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47] total 81 [2021-08-21 17:59:46,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271925365] [2021-08-21 17:59:46,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-08-21 17:59:46,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:59:46,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-08-21 17:59:46,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=6264, Unknown=0, NotChecked=0, Total=6480 [2021-08-21 17:59:46,333 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand has 81 states, 81 states have (on average 1.2098765432098766) internal successors, (98), 81 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:55,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:59:55,070 INFO L93 Difference]: Finished difference Result 102 states and 106 transitions. [2021-08-21 17:59:55,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-21 17:59:55,070 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.2098765432098766) internal successors, (98), 81 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-21 17:59:55,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:59:55,070 INFO L225 Difference]: With dead ends: 102 [2021-08-21 17:59:55,071 INFO L226 Difference]: Without dead ends: 58 [2021-08-21 17:59:55,071 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 10704.7ms TimeCoverageRelationStatistics Valid=658, Invalid=12224, Unknown=0, NotChecked=0, Total=12882 [2021-08-21 17:59:55,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-08-21 17:59:55,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-08-21 17:59:55,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:55,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2021-08-21 17:59:55,073 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 57 [2021-08-21 17:59:55,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:59:55,073 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2021-08-21 17:59:55,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.2098765432098766) internal successors, (98), 81 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:55,073 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2021-08-21 17:59:55,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 17:59:55,074 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:59:55,074 INFO L512 BasicCegarLoop]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:59:55,106 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-08-21 17:59:55,276 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,SelfDestructingSolverStorable65 [2021-08-21 17:59:55,277 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:59:55,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:59:55,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1478292125, now seen corresponding path program 54 times [2021-08-21 17:59:55,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:59:55,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387097341] [2021-08-21 17:59:55,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:59:55,278 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:59:55,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:59:56,686 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:56,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:59:56,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387097341] [2021-08-21 17:59:56,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387097341] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:56,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979613172] [2021-08-21 17:59:56,687 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:59:56,687 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:56,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:59:56,688 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:59:56,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-21 18:00:01,526 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-21 18:00:01,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:00:01,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 93 conjunts are in the unsatisfiable core [2021-08-21 18:00:01,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:02,762 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 18:00:02,762 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 61 treesize of output 54 [2021-08-21 18:00:04,911 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 18:00:04,912 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 91 treesize of output 80 [2021-08-21 18:00:04,914 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 69 treesize of output 55 [2021-08-21 18:00:05,227 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:05,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979613172] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:05,228 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:05,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 79 [2021-08-21 18:00:05,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345037485] [2021-08-21 18:00:05,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-08-21 18:00:05,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:05,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-08-21 18:00:05,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=5938, Unknown=0, NotChecked=0, Total=6162 [2021-08-21 18:00:05,229 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand has 79 states, 79 states have (on average 1.2278481012658229) internal successors, (97), 79 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:09,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:09,034 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2021-08-21 18:00:09,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 18:00:09,034 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.2278481012658229) internal successors, (97), 79 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-21 18:00:09,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:09,035 INFO L225 Difference]: With dead ends: 64 [2021-08-21 18:00:09,035 INFO L226 Difference]: Without dead ends: 59 [2021-08-21 18:00:09,036 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1839 ImplicationChecksByTransitivity, 5518.9ms TimeCoverageRelationStatistics Valid=574, Invalid=11198, Unknown=0, NotChecked=0, Total=11772 [2021-08-21 18:00:09,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-08-21 18:00:09,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-08-21 18:00:09,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 58 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:09,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2021-08-21 18:00:09,037 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 57 [2021-08-21 18:00:09,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:09,037 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2021-08-21 18:00:09,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.2278481012658229) internal successors, (97), 79 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:09,037 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2021-08-21 18:00:09,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-08-21 18:00:09,038 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:09,038 INFO L512 BasicCegarLoop]: trace histogram [14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:09,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-08-21 18:00:09,238 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,SelfDestructingSolverStorable66 [2021-08-21 18:00:09,238 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:00:09,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:09,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1643960766, now seen corresponding path program 55 times [2021-08-21 18:00:09,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:09,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419988908] [2021-08-21 18:00:09,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:09,240 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:09,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:10,638 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 14 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:10,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:10,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419988908] [2021-08-21 18:00:10,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419988908] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:10,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649888670] [2021-08-21 18:00:10,638 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:00:10,638 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:10,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:10,640 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:00:10,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-21 18:00:15,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:15,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 93 conjunts are in the unsatisfiable core [2021-08-21 18:00:15,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:17,029 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 18:00:17,029 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 73 treesize of output 64 [2021-08-21 18:00:19,184 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 18:00:19,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 48 [2021-08-21 18:00:19,187 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 39 treesize of output 31 [2021-08-21 18:00:19,275 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 14 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:19,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649888670] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:19,276 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:19,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 78 [2021-08-21 18:00:19,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160661616] [2021-08-21 18:00:19,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-08-21 18:00:19,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:19,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-08-21 18:00:19,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=5771, Unknown=0, NotChecked=0, Total=6006 [2021-08-21 18:00:19,277 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand has 78 states, 78 states have (on average 1.2692307692307692) internal successors, (99), 78 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:23,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:23,324 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2021-08-21 18:00:23,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 18:00:23,324 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.2692307692307692) internal successors, (99), 78 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-08-21 18:00:23,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:23,325 INFO L225 Difference]: With dead ends: 76 [2021-08-21 18:00:23,325 INFO L226 Difference]: Without dead ends: 60 [2021-08-21 18:00:23,326 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1804 ImplicationChecksByTransitivity, 5672.1ms TimeCoverageRelationStatistics Valid=590, Invalid=10966, Unknown=0, NotChecked=0, Total=11556 [2021-08-21 18:00:23,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-08-21 18:00:23,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-08-21 18:00:23,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 59 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:23,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2021-08-21 18:00:23,327 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 58 [2021-08-21 18:00:23,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:23,327 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2021-08-21 18:00:23,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.2692307692307692) internal successors, (99), 78 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:23,327 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2021-08-21 18:00:23,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-21 18:00:23,327 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:23,327 INFO L512 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:23,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-08-21 18:00:23,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:23,528 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:00:23,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:23,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1598253275, now seen corresponding path program 56 times [2021-08-21 18:00:23,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:23,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497522922] [2021-08-21 18:00:23,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:23,529 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:23,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:25,584 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:25,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:25,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497522922] [2021-08-21 18:00:25,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497522922] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:25,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639058496] [2021-08-21 18:00:25,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:00:25,585 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:25,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:25,586 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:00:25,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-21 18:00:30,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:00:30,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:00:30,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 101 conjunts are in the unsatisfiable core [2021-08-21 18:00:30,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:33,685 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 18:00:33,685 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 124 treesize of output 109 [2021-08-21 18:00:39,049 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 18:00:39,050 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 173 treesize of output 152 [2021-08-21 18:00:39,052 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 149 treesize of output 125 [2021-08-21 18:00:39,804 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:39,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639058496] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:39,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:39,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 84 [2021-08-21 18:00:39,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763074052] [2021-08-21 18:00:39,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-08-21 18:00:39,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:39,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-08-21 18:00:39,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=6763, Unknown=0, NotChecked=0, Total=6972 [2021-08-21 18:00:39,806 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 84 states, 84 states have (on average 1.1904761904761905) internal successors, (100), 84 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:54,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:54,357 INFO L93 Difference]: Finished difference Result 137 states and 142 transitions. [2021-08-21 18:00:54,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-08-21 18:00:54,358 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.1904761904761905) internal successors, (100), 84 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-08-21 18:00:54,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:54,358 INFO L225 Difference]: With dead ends: 137 [2021-08-21 18:00:54,358 INFO L226 Difference]: Without dead ends: 104 [2021-08-21 18:00:54,359 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2736 ImplicationChecksByTransitivity, 16694.0ms TimeCoverageRelationStatistics Valid=902, Invalid=17458, Unknown=0, NotChecked=0, Total=18360 [2021-08-21 18:00:54,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-08-21 18:00:54,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 82. [2021-08-21 18:00:54,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.0617283950617284) internal successors, (86), 81 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) [2021-08-21 18:00:54,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2021-08-21 18:00:54,361 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 59 [2021-08-21 18:00:54,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:54,361 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2021-08-21 18:00:54,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.1904761904761905) internal successors, (100), 84 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:54,361 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2021-08-21 18:00:54,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-08-21 18:00:54,362 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:54,362 INFO L512 BasicCegarLoop]: trace histogram [15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:54,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-08-21 18:00:54,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:54,585 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:00:54,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:54,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1567215549, now seen corresponding path program 57 times [2021-08-21 18:00:54,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:54,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063712582] [2021-08-21 18:00:54,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:54,585 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:54,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:56,523 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:56,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:56,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063712582] [2021-08-21 18:00:56,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063712582] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:56,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282158336] [2021-08-21 18:00:56,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:00:56,524 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:56,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:56,525 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:00:56,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-21 18:01:01,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-08-21 18:01:01,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:01,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 99 conjunts are in the unsatisfiable core [2021-08-21 18:01:01,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:03,117 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 18:01:03,117 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 61 treesize of output 54 [2021-08-21 18:01:05,462 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 18:01:05,462 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 91 treesize of output 80 [2021-08-21 18:01:05,464 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 69 treesize of output 55 [2021-08-21 18:01:05,784 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:05,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282158336] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:05,784 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:05,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 84 [2021-08-21 18:01:05,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697153037] [2021-08-21 18:01:05,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-08-21 18:01:05,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:05,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-08-21 18:01:05,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=6734, Unknown=0, NotChecked=0, Total=6972 [2021-08-21 18:01:05,785 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand has 84 states, 84 states have (on average 1.2142857142857142) internal successors, (102), 84 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:13,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:13,730 INFO L93 Difference]: Finished difference Result 141 states and 146 transitions. [2021-08-21 18:01:13,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-08-21 18:01:13,731 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.2142857142857142) internal successors, (102), 84 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-08-21 18:01:13,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:13,731 INFO L225 Difference]: With dead ends: 141 [2021-08-21 18:01:13,731 INFO L226 Difference]: Without dead ends: 131 [2021-08-21 18:01:13,732 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2783 ImplicationChecksByTransitivity, 9628.4ms TimeCoverageRelationStatistics Valid=861, Invalid=16961, Unknown=0, NotChecked=0, Total=17822 [2021-08-21 18:01:13,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-08-21 18:01:13,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 65. [2021-08-21 18:01:13,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.0625) internal successors, (68), 64 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:13,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2021-08-21 18:01:13,733 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 60 [2021-08-21 18:01:13,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:13,733 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2021-08-21 18:01:13,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.2142857142857142) internal successors, (102), 84 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:13,734 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2021-08-21 18:01:13,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-21 18:01:13,734 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:13,734 INFO L512 BasicCegarLoop]: trace histogram [15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:13,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-08-21 18:01:13,934 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,SelfDestructingSolverStorable69 [2021-08-21 18:01:13,934 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:01:13,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:13,935 INFO L82 PathProgramCache]: Analyzing trace with hash -303728611, now seen corresponding path program 58 times [2021-08-21 18:01:13,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:13,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804186093] [2021-08-21 18:01:13,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:13,935 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:13,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:15,794 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 16 proven. 329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:15,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:15,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804186093] [2021-08-21 18:01:15,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804186093] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:15,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268682661] [2021-08-21 18:01:15,795 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:01:15,795 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:15,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:15,796 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:01:15,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-21 18:01:21,130 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:01:21,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:21,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 99 conjunts are in the unsatisfiable core [2021-08-21 18:01:21,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:24,214 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 18:01:24,214 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 67 treesize of output 62 [2021-08-21 18:01:27,037 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 18:01:27,037 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 54 treesize of output 51 [2021-08-21 18:01:27,039 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 48 treesize of output 42 [2021-08-21 18:01:27,169 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 15 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:27,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268682661] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:27,169 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:27,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49] total 83 [2021-08-21 18:01:27,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362264987] [2021-08-21 18:01:27,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-08-21 18:01:27,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:27,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-08-21 18:01:27,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=6581, Unknown=0, NotChecked=0, Total=6806 [2021-08-21 18:01:27,170 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand has 83 states, 83 states have (on average 1.2530120481927711) internal successors, (104), 83 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:34,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:34,520 INFO L93 Difference]: Finished difference Result 97 states and 100 transitions. [2021-08-21 18:01:34,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-21 18:01:34,521 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.2530120481927711) internal successors, (104), 83 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-08-21 18:01:34,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:34,521 INFO L225 Difference]: With dead ends: 97 [2021-08-21 18:01:34,521 INFO L226 Difference]: Without dead ends: 62 [2021-08-21 18:01:34,522 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1164 ImplicationChecksByTransitivity, 9779.2ms TimeCoverageRelationStatistics Valid=643, Invalid=12929, Unknown=0, NotChecked=0, Total=13572 [2021-08-21 18:01:34,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-08-21 18:01:34,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-08-21 18:01:34,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 61 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:34,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2021-08-21 18:01:34,523 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 61 [2021-08-21 18:01:34,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:34,523 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2021-08-21 18:01:34,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.2530120481927711) internal successors, (104), 83 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:34,523 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2021-08-21 18:01:34,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-21 18:01:34,524 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:34,524 INFO L512 BasicCegarLoop]: trace histogram [15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:34,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-08-21 18:01:34,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:34,737 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:01:34,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:34,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1565418148, now seen corresponding path program 59 times [2021-08-21 18:01:34,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:34,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937665038] [2021-08-21 18:01:34,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:34,737 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:34,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:36,236 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 15 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:36,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:36,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937665038] [2021-08-21 18:01:36,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937665038] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:36,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761097805] [2021-08-21 18:01:36,236 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:01:36,236 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:36,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:36,237 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:01:36,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-21 18:01:41,812 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-08-21 18:01:41,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:41,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 99 conjunts are in the unsatisfiable core [2021-08-21 18:01:41,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:43,177 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 18:01:43,177 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 73 treesize of output 64 [2021-08-21 18:01:45,691 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 18:01:45,692 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 54 treesize of output 49 [2021-08-21 18:01:45,694 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 40 treesize of output 32 [2021-08-21 18:01:45,803 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 15 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:45,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761097805] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:45,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:45,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49] total 83 [2021-08-21 18:01:45,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815730207] [2021-08-21 18:01:45,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-08-21 18:01:45,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:45,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-08-21 18:01:45,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=6555, Unknown=0, NotChecked=0, Total=6806 [2021-08-21 18:01:45,805 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand has 83 states, 83 states have (on average 1.2530120481927711) internal successors, (104), 83 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:49,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:49,916 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2021-08-21 18:01:49,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-21 18:01:49,916 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.2530120481927711) internal successors, (104), 83 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-08-21 18:01:49,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:49,916 INFO L225 Difference]: With dead ends: 80 [2021-08-21 18:01:49,916 INFO L226 Difference]: Without dead ends: 63 [2021-08-21 18:01:49,917 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2061 ImplicationChecksByTransitivity, 6103.0ms TimeCoverageRelationStatistics Valid=630, Invalid=12480, Unknown=0, NotChecked=0, Total=13110 [2021-08-21 18:01:49,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-08-21 18:01:49,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-08-21 18:01:49,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:49,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2021-08-21 18:01:49,918 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 61 [2021-08-21 18:01:49,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:49,918 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2021-08-21 18:01:49,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.2530120481927711) internal successors, (104), 83 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:49,919 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2021-08-21 18:01:49,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 18:01:49,919 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:49,919 INFO L512 BasicCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:49,958 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-08-21 18:01:50,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:50,133 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:01:50,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:50,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1482422907, now seen corresponding path program 60 times [2021-08-21 18:01:50,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:50,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019023951] [2021-08-21 18:01:50,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:50,133 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:50,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:52,346 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:52,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:52,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019023951] [2021-08-21 18:01:52,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019023951] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:52,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704391872] [2021-08-21 18:01:52,346 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:01:52,346 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:52,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:52,347 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:01:52,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-21 18:01:57,974 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-08-21 18:01:57,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:57,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 108 conjunts are in the unsatisfiable core [2021-08-21 18:01:57,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:02:01,593 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 18:02:01,594 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 115 treesize of output 102 [2021-08-21 18:02:07,831 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 18:02:07,831 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 164 treesize of output 149 [2021-08-21 18:02:07,834 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 146 treesize of output 128 [2021-08-21 18:02:08,708 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:08,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704391872] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:08,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:02:08,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 89 [2021-08-21 18:02:08,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397540000] [2021-08-21 18:02:08,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2021-08-21 18:02:08,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:02:08,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-08-21 18:02:08,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=7612, Unknown=0, NotChecked=0, Total=7832 [2021-08-21 18:02:08,710 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand has 89 states, 89 states have (on average 1.1797752808988764) internal successors, (105), 89 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:20,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:02:20,477 INFO L93 Difference]: Finished difference Result 137 states and 142 transitions. [2021-08-21 18:02:20,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-21 18:02:20,477 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.1797752808988764) internal successors, (105), 89 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 18:02:20,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:02:20,477 INFO L225 Difference]: With dead ends: 137 [2021-08-21 18:02:20,477 INFO L226 Difference]: Without dead ends: 108 [2021-08-21 18:02:20,478 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1955 ImplicationChecksByTransitivity, 14386.7ms TimeCoverageRelationStatistics Valid=698, Invalid=15052, Unknown=0, NotChecked=0, Total=15750 [2021-08-21 18:02:20,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-08-21 18:02:20,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 67. [2021-08-21 18:02:20,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 66 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) [2021-08-21 18:02:20,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2021-08-21 18:02:20,480 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 62 [2021-08-21 18:02:20,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:02:20,480 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2021-08-21 18:02:20,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.1797752808988764) internal successors, (105), 89 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:20,480 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2021-08-21 18:02:20,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-08-21 18:02:20,480 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:02:20,480 INFO L512 BasicCegarLoop]: trace histogram [16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:02:20,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-08-21 18:02:20,696 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,SelfDestructingSolverStorable72 [2021-08-21 18:02:20,697 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:02:20,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:02:20,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1090429564, now seen corresponding path program 61 times [2021-08-21 18:02:20,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:02:20,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209687762] [2021-08-21 18:02:20,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:02:20,697 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:02:20,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:02:23,025 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:23,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:02:23,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209687762] [2021-08-21 18:02:23,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209687762] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:23,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167340422] [2021-08-21 18:02:23,026 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:02:23,026 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:23,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:02:23,027 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:02:23,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-21 18:02:28,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:02:28,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 105 conjunts are in the unsatisfiable core [2021-08-21 18:02:28,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:02:32,286 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 18:02:32,286 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 67 treesize of output 62 [2021-08-21 18:02:35,379 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 18:02:35,379 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 87 treesize of output 78 [2021-08-21 18:02:35,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 63 [2021-08-21 18:02:35,730 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:35,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167340422] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:35,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:02:35,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53] total 90 [2021-08-21 18:02:35,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113450316] [2021-08-21 18:02:35,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2021-08-21 18:02:35,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:02:35,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-08-21 18:02:35,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=7800, Unknown=0, NotChecked=0, Total=8010 [2021-08-21 18:02:35,732 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand has 90 states, 90 states have (on average 1.1888888888888889) internal successors, (107), 90 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:47,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:02:47,255 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2021-08-21 18:02:47,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-21 18:02:47,255 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.1888888888888889) internal successors, (107), 90 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-08-21 18:02:47,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:02:47,255 INFO L225 Difference]: With dead ends: 112 [2021-08-21 18:02:47,255 INFO L226 Difference]: Without dead ends: 64 [2021-08-21 18:02:47,256 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1280 ImplicationChecksByTransitivity, 14204.1ms TimeCoverageRelationStatistics Valid=723, Invalid=15279, Unknown=0, NotChecked=0, Total=16002 [2021-08-21 18:02:47,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-21 18:02:47,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-08-21 18:02:47,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 63 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:47,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2021-08-21 18:02:47,257 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 63 [2021-08-21 18:02:47,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:02:47,257 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2021-08-21 18:02:47,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.1888888888888889) internal successors, (107), 90 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:47,257 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2021-08-21 18:02:47,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-08-21 18:02:47,257 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:02:47,258 INFO L512 BasicCegarLoop]: trace histogram [16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:02:47,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-08-21 18:02:47,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:47,458 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:02:47,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:02:47,458 INFO L82 PathProgramCache]: Analyzing trace with hash 632759581, now seen corresponding path program 62 times [2021-08-21 18:02:47,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:02:47,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727967090] [2021-08-21 18:02:47,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:02:47,459 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:02:47,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:02:49,348 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:49,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:02:49,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727967090] [2021-08-21 18:02:49,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727967090] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:49,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218115322] [2021-08-21 18:02:49,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:02:49,349 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:49,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:02:49,349 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:02:49,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-21 18:02:55,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:02:55,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:02:55,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 105 conjunts are in the unsatisfiable core [2021-08-21 18:02:55,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:02:56,833 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 18:02:56,833 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 61 treesize of output 54 [2021-08-21 18:02:59,655 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 18:02:59,655 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 99 treesize of output 86 [2021-08-21 18:02:59,657 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 75 treesize of output 59 [2021-08-21 18:02:59,961 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:59,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218115322] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:59,962 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:02:59,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 89 [2021-08-21 18:02:59,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8198457] [2021-08-21 18:02:59,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2021-08-21 18:02:59,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:02:59,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-08-21 18:02:59,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=7578, Unknown=0, NotChecked=0, Total=7832 [2021-08-21 18:02:59,963 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand has 89 states, 89 states have (on average 1.202247191011236) internal successors, (107), 89 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:07,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:03:07,643 INFO L93 Difference]: Finished difference Result 102 states and 105 transitions. [2021-08-21 18:03:07,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-08-21 18:03:07,644 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.202247191011236) internal successors, (107), 89 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-08-21 18:03:07,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:03:07,644 INFO L225 Difference]: With dead ends: 102 [2021-08-21 18:03:07,644 INFO L226 Difference]: Without dead ends: 92 [2021-08-21 18:03:07,646 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3374 ImplicationChecksByTransitivity, 9762.5ms TimeCoverageRelationStatistics Valid=924, Invalid=18816, Unknown=0, NotChecked=0, Total=19740 [2021-08-21 18:03:07,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-08-21 18:03:07,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2021-08-21 18:03:07,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.046875) internal successors, (67), 64 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:07,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2021-08-21 18:03:07,647 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 63 [2021-08-21 18:03:07,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:03:07,647 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2021-08-21 18:03:07,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.202247191011236) internal successors, (107), 89 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:07,648 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2021-08-21 18:03:07,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-08-21 18:03:07,648 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:03:07,648 INFO L512 BasicCegarLoop]: trace histogram [16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:03:07,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-08-21 18:03:07,853 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,SelfDestructingSolverStorable74 [2021-08-21 18:03:07,853 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:03:07,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:03:07,853 INFO L82 PathProgramCache]: Analyzing trace with hash -2085665854, now seen corresponding path program 63 times [2021-08-21 18:03:07,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:03:07,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640403060] [2021-08-21 18:03:07,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:03:07,853 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:03:07,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:03:09,552 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 16 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:03:09,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:03:09,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640403060] [2021-08-21 18:03:09,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640403060] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:09,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194408698] [2021-08-21 18:03:09,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:03:09,552 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:03:09,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:03:09,553 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:03:09,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-21 18:03:15,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-08-21 18:03:15,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:03:15,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 105 conjunts are in the unsatisfiable core [2021-08-21 18:03:15,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:03:17,199 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 18:03:17,199 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 73 treesize of output 64 Received shutdown request... [2021-08-21 18:03:19,511 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 18:03:19,512 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 18:03:19,512 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 18:03:19,553 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2021-08-21 18:03:19,713 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,SelfDestructingSolverStorable75 [2021-08-21 18:03:19,713 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 65 with TraceHistMax 16,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 84 known predicates. [2021-08-21 18:03:19,715 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 18:03:19,715 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 18:03:19,715 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-21 18:03:19,720 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 18:03:19,720 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 18:03:19,721 INFO L202 PluginConnector]: Adding new model word-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 06:03:19 BasicIcfg [2021-08-21 18:03:19,722 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 18:03:19,722 INFO L168 Benchmark]: Toolchain (without parser) took 713935.03 ms. Allocated memory was 196.1 MB in the beginning and 1.1 GB in the end (delta: 879.8 MB). Free memory was 175.9 MB in the beginning and 341.6 MB in the end (delta: -165.7 MB). Peak memory consumption was 715.0 MB. Max. memory is 8.0 GB. [2021-08-21 18:03:19,722 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 196.1 MB. Free memory is still 177.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 18:03:19,723 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.10 ms. Allocated memory is still 196.1 MB. Free memory was 175.9 MB in the beginning and 174.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 18:03:19,723 INFO L168 Benchmark]: Boogie Preprocessor took 36.95 ms. Allocated memory is still 196.1 MB. Free memory was 174.4 MB in the beginning and 173.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 18:03:19,723 INFO L168 Benchmark]: RCFGBuilder took 440.91 ms. Allocated memory is still 196.1 MB. Free memory was 173.2 MB in the beginning and 148.3 MB in the end (delta: 24.9 MB). Peak memory consumption was 25.2 MB. Max. memory is 8.0 GB. [2021-08-21 18:03:19,723 INFO L168 Benchmark]: TraceAbstraction took 713417.06 ms. Allocated memory was 196.1 MB in the beginning and 1.1 GB in the end (delta: 879.8 MB). Free memory was 147.8 MB in the beginning and 341.6 MB in the end (delta: -193.8 MB). Peak memory consumption was 686.7 MB. Max. memory is 8.0 GB. [2021-08-21 18:03:19,724 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 0.20 ms. Allocated memory is still 196.1 MB. Free memory is still 177.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 35.10 ms. Allocated memory is still 196.1 MB. Free memory was 175.9 MB in the beginning and 174.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 36.95 ms. Allocated memory is still 196.1 MB. Free memory was 174.4 MB in the beginning and 173.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 440.91 ms. Allocated memory is still 196.1 MB. Free memory was 173.2 MB in the beginning and 148.3 MB in the end (delta: 24.9 MB). Peak memory consumption was 25.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 713417.06 ms. Allocated memory was 196.1 MB in the beginning and 1.1 GB in the end (delta: 879.8 MB). Free memory was 147.8 MB in the beginning and 341.6 MB in the end (delta: -193.8 MB). Peak memory consumption was 686.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 379, positive: 325, positive conditional: 325, positive unconditional: 0, negative: 54, negative conditional: 54, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 325, positive: 325, positive conditional: 0, positive unconditional: 325, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 105, positive: 105, positive conditional: 0, positive unconditional: 105, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 105, positive: 105, positive conditional: 0, positive unconditional: 105, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 325, positive: 220, positive conditional: 0, positive unconditional: 220, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 105, unknown conditional: 0, unknown unconditional: 105] , Statistics on independence cache: Total cache size (in pairs): 105, Positive cache size: 105, Positive conditional cache size: 0, Positive unconditional cache size: 105, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Independence queries for same thread: 54 - 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: 128]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 65 with TraceHistMax 16,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 84 known predicates. - TimeoutResultAtElement [Line: 122]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 65 with TraceHistMax 16,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 84 known predicates. - TimeoutResultAtElement [Line: 121]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 65 with TraceHistMax 16,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 84 known predicates. - TimeoutResultAtElement [Line: 118]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 65 with TraceHistMax 16,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 84 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 38 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 713280.1ms, OverallIterations: 76, TraceHistogramMax: 16, EmptinessCheckTime: 47.7ms, AutomataDifference: 263002.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 110.3ms, PartialOrderReductionTime: 95.4ms, HoareTripleCheckerStatistics: 1203 SDtfs, 7693 SDslu, 35655 SDs, 0 SdLazy, 93553 SolverSat, 7651 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 52262.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6199 GetRequests, 1342 SyntacticMatches, 67 SemanticMatches, 4790 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57505 ImplicationChecksByTransitivity, 323676.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=108occurred in iteration=0, InterpolantAutomatonStates: 2246, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 146.2ms AutomataMinimizationTime, 75 MinimizatonAttempts, 982 StatesRemovedByMinimization, 42 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 624.9ms SsaConstructionTime, 3651.1ms SatisfiabilityAnalysisTime, 268226.8ms InterpolantComputationTime, 5446 NumberOfCodeBlocks, 5446 NumberOfCodeBlocksAsserted, 289 NumberOfCheckSat, 5304 ConstructedInterpolants, 1349 QuantifiedInterpolants, 133495 SizeOfPredicates, 577 NumberOfNonLiveVariables, 15995 ConjunctsInSsa, 3897 ConjunctsInUnsatCore, 142 InterpolantComputations, 8 PerfectInterpolantSequences, 354/17238 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