/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/min-max-dec.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 20:01:07,327 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 20:01:07,329 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 20:01:07,357 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-06 20:01:07,358 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-06 20:01:07,360 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-06 20:01:07,362 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-06 20:01:07,366 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-06 20:01:07,367 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-06 20:01:07,370 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-06 20:01:07,371 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-06 20:01:07,372 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-06 20:01:07,372 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-06 20:01:07,373 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-06 20:01:07,374 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-06 20:01:07,379 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-06 20:01:07,379 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-06 20:01:07,380 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-06 20:01:07,382 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-06 20:01:07,386 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-06 20:01:07,387 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-06 20:01:07,387 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-06 20:01:07,388 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-06 20:01:07,390 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-06 20:01:07,394 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-06 20:01:07,394 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-06 20:01:07,394 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-06 20:01:07,395 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-06 20:01:07,395 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-06 20:01:07,397 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-06 20:01:07,397 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-06 20:01:07,398 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-06 20:01:07,399 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-06 20:01:07,399 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-06 20:01:07,400 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-06 20:01:07,400 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-06 20:01:07,401 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-06 20:01:07,401 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-06 20:01:07,401 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-06 20:01:07,402 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-06 20:01:07,402 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-06 20:01:07,403 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf [2021-08-06 20:01:07,430 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 20:01:07,430 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 20:01:07,433 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 20:01:07,433 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 20:01:07,433 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 20:01:07,433 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 20:01:07,433 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 20:01:07,434 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 20:01:07,434 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 20:01:07,434 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 20:01:07,435 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 20:01:07,435 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 20:01:07,435 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 20:01:07,435 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 20:01:07,435 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 20:01:07,435 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 20:01:07,435 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 20:01:07,435 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 20:01:07,436 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 20:01:07,436 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 20:01:07,436 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 20:01:07,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 20:01:07,436 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 20:01:07,436 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 20:01:07,436 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 20:01:07,437 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 20:01:07,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 20:01:07,437 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 20:01:07,437 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 20:01:07,437 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-06 20:01:07,437 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 20:01:07,758 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 20:01:07,774 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 20:01:07,775 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 20:01:07,776 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-06 20:01:07,777 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-06 20:01:07,777 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/min-max-dec.wvr.bpl [2021-08-06 20:01:07,778 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/min-max-dec.wvr.bpl' [2021-08-06 20:01:07,817 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 20:01:07,818 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-06 20:01:07,819 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 20:01:07,820 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 20:01:07,820 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 20:01:07,829 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-max-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:01:07" (1/1) ... [2021-08-06 20:01:07,834 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-max-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:01:07" (1/1) ... [2021-08-06 20:01:07,840 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 20:01:07,842 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 20:01:07,842 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 20:01:07,842 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 20:01:07,847 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-max-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:01:07" (1/1) ... [2021-08-06 20:01:07,847 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-max-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:01:07" (1/1) ... [2021-08-06 20:01:07,849 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-max-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:01:07" (1/1) ... [2021-08-06 20:01:07,850 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-max-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:01:07" (1/1) ... [2021-08-06 20:01:07,855 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-max-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:01:07" (1/1) ... [2021-08-06 20:01:07,859 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-max-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:01:07" (1/1) ... [2021-08-06 20:01:07,860 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-max-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:01:07" (1/1) ... [2021-08-06 20:01:07,864 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 20:01:07,865 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 20:01:07,865 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 20:01:07,865 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 20:01:07,866 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-max-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:01:07" (1/1) ... [2021-08-06 20:01:07,871 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 20:01:07,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:01:07,888 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-06 20:01:07,906 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 [2021-08-06 20:01:07,920 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-06 20:01:07,920 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-06 20:01:07,920 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-06 20:01:07,920 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-06 20:01:07,920 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-06 20:01:07,921 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-06 20:01:07,921 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-06 20:01:07,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 20:01:07,921 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 20:01:07,921 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-06 20:01:07,921 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-06 20:01:07,921 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-06 20:01:07,922 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-08-06 20:01:07,922 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-08-06 20:01:07,922 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-08-06 20:01:07,922 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-06 20:01:08,146 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 20:01:08,146 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-06 20:01:08,148 INFO L202 PluginConnector]: Adding new model min-max-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 08:01:08 BoogieIcfgContainer [2021-08-06 20:01:08,148 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 20:01:08,149 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 20:01:08,149 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 20:01:08,151 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 20:01:08,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:01:07" (1/2) ... [2021-08-06 20:01:08,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74d0c241 and model type min-max-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 08:01:08, skipping insertion in model container [2021-08-06 20:01:08,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 08:01:08" (2/2) ... [2021-08-06 20:01:08,153 INFO L111 eAbstractionObserver]: Analyzing ICFG min-max-dec.wvr.bpl [2021-08-06 20:01:08,156 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 20:01:08,156 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 20:01:08,156 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 20:01:08,156 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 20:01:08,225 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-08-06 20:01:08,265 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 20:01:08,271 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-06 20:01:08,271 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-08-06 20:01:08,541 INFO L276 IsEmpty]: Start isEmpty. Operand has 710 states, 475 states have (on average 2.7178947368421054) internal successors, (1291), 709 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:08,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 20:01:08,554 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:01:08,555 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:01:08,555 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:01:08,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:01:08,559 INFO L82 PathProgramCache]: Analyzing trace with hash 121640407, now seen corresponding path program 1 times [2021-08-06 20:01:08,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:01:08,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638901740] [2021-08-06 20:01:08,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:01:08,565 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:01:08,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:08,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:01:08,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:01:08,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638901740] [2021-08-06 20:01:08,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638901740] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:01:08,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:01:08,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 20:01:08,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251914306] [2021-08-06 20:01:08,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 20:01:08,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:01:08,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 20:01:08,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 20:01:08,689 INFO L87 Difference]: Start difference. First operand has 710 states, 475 states have (on average 2.7178947368421054) internal successors, (1291), 709 states have internal predecessors, (1291), 0 states have call successors, (0), 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 4 states, 4 states have (on average 5.75) internal successors, (23), 3 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) [2021-08-06 20:01:08,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:01:08,731 INFO L93 Difference]: Finished difference Result 961 states and 1734 transitions. [2021-08-06 20:01:08,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 20:01:08,732 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 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 23 [2021-08-06 20:01:08,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:01:08,740 INFO L225 Difference]: With dead ends: 961 [2021-08-06 20:01:08,741 INFO L226 Difference]: Without dead ends: 229 [2021-08-06 20:01:08,741 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 20:01:08,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-08-06 20:01:08,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2021-08-06 20:01:08,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.587719298245614) internal successors, (590), 228 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:08,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 590 transitions. [2021-08-06 20:01:08,773 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 590 transitions. Word has length 23 [2021-08-06 20:01:08,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:01:08,774 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 590 transitions. [2021-08-06 20:01:08,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 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) [2021-08-06 20:01:08,774 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 590 transitions. [2021-08-06 20:01:08,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 20:01:08,776 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:01:08,776 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:01:08,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 20:01:08,776 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:01:08,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:01:08,777 INFO L82 PathProgramCache]: Analyzing trace with hash -443022147, now seen corresponding path program 2 times [2021-08-06 20:01:08,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:01:08,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232227225] [2021-08-06 20:01:08,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:01:08,777 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:01:08,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:08,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:01:08,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:01:08,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232227225] [2021-08-06 20:01:08,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232227225] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:01:08,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:01:08,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 20:01:08,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853936352] [2021-08-06 20:01:08,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 20:01:08,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:01:08,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 20:01:08,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-06 20:01:08,829 INFO L87 Difference]: Start difference. First operand 229 states and 590 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 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) [2021-08-06 20:01:08,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:01:08,962 INFO L93 Difference]: Finished difference Result 936 states and 2497 transitions. [2021-08-06 20:01:08,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 20:01:08,963 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 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 23 [2021-08-06 20:01:08,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:01:08,966 INFO L225 Difference]: With dead ends: 936 [2021-08-06 20:01:08,966 INFO L226 Difference]: Without dead ends: 500 [2021-08-06 20:01:08,966 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 31.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-06 20:01:08,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-08-06 20:01:08,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 276. [2021-08-06 20:01:08,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.5054545454545454) internal successors, (689), 275 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:08,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 689 transitions. [2021-08-06 20:01:08,980 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 689 transitions. Word has length 23 [2021-08-06 20:01:08,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:01:08,980 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 689 transitions. [2021-08-06 20:01:08,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 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) [2021-08-06 20:01:08,981 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 689 transitions. [2021-08-06 20:01:08,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 20:01:08,982 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:01:08,982 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:01:08,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-06 20:01:08,983 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:01:08,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:01:08,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1888697155, now seen corresponding path program 3 times [2021-08-06 20:01:08,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:01:08,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669882077] [2021-08-06 20:01:08,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:01:08,984 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:01:08,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:09,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:01:09,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:01:09,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669882077] [2021-08-06 20:01:09,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669882077] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:01:09,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:01:09,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 20:01:09,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159789698] [2021-08-06 20:01:09,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 20:01:09,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:01:09,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 20:01:09,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-06 20:01:09,022 INFO L87 Difference]: Start difference. First operand 276 states and 689 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 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) [2021-08-06 20:01:09,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:01:09,083 INFO L93 Difference]: Finished difference Result 1207 states and 3198 transitions. [2021-08-06 20:01:09,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 20:01:09,083 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 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 23 [2021-08-06 20:01:09,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:01:09,087 INFO L225 Difference]: With dead ends: 1207 [2021-08-06 20:01:09,087 INFO L226 Difference]: Without dead ends: 787 [2021-08-06 20:01:09,087 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 25.5ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-06 20:01:09,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2021-08-06 20:01:09,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 281. [2021-08-06 20:01:09,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.5428571428571427) internal successors, (712), 280 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:09,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 712 transitions. [2021-08-06 20:01:09,099 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 712 transitions. Word has length 23 [2021-08-06 20:01:09,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:01:09,100 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 712 transitions. [2021-08-06 20:01:09,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 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) [2021-08-06 20:01:09,100 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 712 transitions. [2021-08-06 20:01:09,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 20:01:09,101 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:01:09,101 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:01:09,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-06 20:01:09,101 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:01:09,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:01:09,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1128293079, now seen corresponding path program 4 times [2021-08-06 20:01:09,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:01:09,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551311661] [2021-08-06 20:01:09,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:01:09,102 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:01:09,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:09,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:01:09,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:01:09,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551311661] [2021-08-06 20:01:09,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551311661] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:01:09,151 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:01:09,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 20:01:09,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021814944] [2021-08-06 20:01:09,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 20:01:09,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:01:09,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 20:01:09,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 20:01:09,152 INFO L87 Difference]: Start difference. First operand 281 states and 712 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 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) [2021-08-06 20:01:09,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:01:09,164 INFO L93 Difference]: Finished difference Result 350 states and 909 transitions. [2021-08-06 20:01:09,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 20:01:09,164 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 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 23 [2021-08-06 20:01:09,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:01:09,165 INFO L225 Difference]: With dead ends: 350 [2021-08-06 20:01:09,165 INFO L226 Difference]: Without dead ends: 233 [2021-08-06 20:01:09,166 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 20:01:09,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-08-06 20:01:09,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2021-08-06 20:01:09,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.413793103448276) internal successors, (560), 232 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:09,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 560 transitions. [2021-08-06 20:01:09,171 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 560 transitions. Word has length 23 [2021-08-06 20:01:09,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:01:09,171 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 560 transitions. [2021-08-06 20:01:09,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 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) [2021-08-06 20:01:09,171 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 560 transitions. [2021-08-06 20:01:09,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 20:01:09,172 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:01:09,172 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:01:09,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-06 20:01:09,172 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:01:09,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:01:09,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1795647777, now seen corresponding path program 1 times [2021-08-06 20:01:09,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:01:09,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082121555] [2021-08-06 20:01:09,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:01:09,173 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:01:09,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:09,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:01:09,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:01:09,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082121555] [2021-08-06 20:01:09,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082121555] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:09,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194697295] [2021-08-06 20:01:09,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:01:09,217 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:09,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:01:09,218 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:01:09,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-06 20:01:09,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:09,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-06 20:01:09,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:01:09,392 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:01:09,393 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:01:09,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:01:09,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194697295] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:09,438 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:01:09,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-08-06 20:01:09,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129890220] [2021-08-06 20:01:09,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 20:01:09,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:01:09,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 20:01:09,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-06 20:01:09,440 INFO L87 Difference]: Start difference. First operand 233 states and 560 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 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) [2021-08-06 20:01:09,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:01:09,487 INFO L93 Difference]: Finished difference Result 535 states and 1310 transitions. [2021-08-06 20:01:09,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 20:01:09,487 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 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 25 [2021-08-06 20:01:09,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:01:09,489 INFO L225 Difference]: With dead ends: 535 [2021-08-06 20:01:09,489 INFO L226 Difference]: Without dead ends: 535 [2021-08-06 20:01:09,490 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 39.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-06 20:01:09,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-08-06 20:01:09,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 301. [2021-08-06 20:01:09,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.473333333333333) internal successors, (742), 300 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:09,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 742 transitions. [2021-08-06 20:01:09,498 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 742 transitions. Word has length 25 [2021-08-06 20:01:09,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:01:09,498 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 742 transitions. [2021-08-06 20:01:09,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 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) [2021-08-06 20:01:09,498 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 742 transitions. [2021-08-06 20:01:09,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 20:01:09,499 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:01:09,499 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:01:09,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-06 20:01:09,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:09,717 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:01:09,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:01:09,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1551642463, now seen corresponding path program 1 times [2021-08-06 20:01:09,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:01:09,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894522735] [2021-08-06 20:01:09,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:01:09,718 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:01:09,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:09,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:01:09,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:01:09,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894522735] [2021-08-06 20:01:09,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894522735] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:01:09,745 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:01:09,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 20:01:09,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070287166] [2021-08-06 20:01:09,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 20:01:09,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:01:09,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 20:01:09,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 20:01:09,746 INFO L87 Difference]: Start difference. First operand 301 states and 742 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 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) [2021-08-06 20:01:09,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:01:09,783 INFO L93 Difference]: Finished difference Result 508 states and 1224 transitions. [2021-08-06 20:01:09,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 20:01:09,784 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 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) Word has length 25 [2021-08-06 20:01:09,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:01:09,786 INFO L225 Difference]: With dead ends: 508 [2021-08-06 20:01:09,786 INFO L226 Difference]: Without dead ends: 508 [2021-08-06 20:01:09,786 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 20:01:09,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-08-06 20:01:09,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 386. [2021-08-06 20:01:09,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.5714285714285716) internal successors, (990), 385 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:09,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 990 transitions. [2021-08-06 20:01:09,795 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 990 transitions. Word has length 25 [2021-08-06 20:01:09,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:01:09,795 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 990 transitions. [2021-08-06 20:01:09,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 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) [2021-08-06 20:01:09,796 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 990 transitions. [2021-08-06 20:01:09,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 20:01:09,796 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:01:09,797 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:01:09,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-06 20:01:09,797 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:01:09,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:01:09,797 INFO L82 PathProgramCache]: Analyzing trace with hash -926545313, now seen corresponding path program 1 times [2021-08-06 20:01:09,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:01:09,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475358082] [2021-08-06 20:01:09,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:01:09,798 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:01:09,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:09,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:01:09,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:01:09,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475358082] [2021-08-06 20:01:09,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475358082] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:01:09,821 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:01:09,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 20:01:09,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228971311] [2021-08-06 20:01:09,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 20:01:09,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:01:09,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 20:01:09,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 20:01:09,822 INFO L87 Difference]: Start difference. First operand 386 states and 990 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 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) [2021-08-06 20:01:09,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:01:09,853 INFO L93 Difference]: Finished difference Result 475 states and 1186 transitions. [2021-08-06 20:01:09,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 20:01:09,854 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 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) Word has length 25 [2021-08-06 20:01:09,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:01:09,856 INFO L225 Difference]: With dead ends: 475 [2021-08-06 20:01:09,856 INFO L226 Difference]: Without dead ends: 453 [2021-08-06 20:01:09,856 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 20:01:09,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-08-06 20:01:09,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 386. [2021-08-06 20:01:09,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.6) internal successors, (1001), 385 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:09,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1001 transitions. [2021-08-06 20:01:09,863 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1001 transitions. Word has length 25 [2021-08-06 20:01:09,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:01:09,863 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 1001 transitions. [2021-08-06 20:01:09,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 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) [2021-08-06 20:01:09,863 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1001 transitions. [2021-08-06 20:01:09,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 20:01:09,864 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:01:09,864 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:01:09,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-06 20:01:09,865 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:01:09,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:01:09,865 INFO L82 PathProgramCache]: Analyzing trace with hash -370698401, now seen corresponding path program 2 times [2021-08-06 20:01:09,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:01:09,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753571208] [2021-08-06 20:01:09,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:01:09,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:01:09,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:09,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:01:09,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:01:09,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753571208] [2021-08-06 20:01:09,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753571208] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:01:09,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:01:09,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 20:01:09,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63210029] [2021-08-06 20:01:09,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 20:01:09,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:01:09,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 20:01:09,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 20:01:09,897 INFO L87 Difference]: Start difference. First operand 386 states and 1001 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 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) [2021-08-06 20:01:09,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:01:09,926 INFO L93 Difference]: Finished difference Result 480 states and 1158 transitions. [2021-08-06 20:01:09,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 20:01:09,927 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 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) Word has length 25 [2021-08-06 20:01:09,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:01:09,928 INFO L225 Difference]: With dead ends: 480 [2021-08-06 20:01:09,928 INFO L226 Difference]: Without dead ends: 450 [2021-08-06 20:01:09,929 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 9.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 20:01:09,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-08-06 20:01:09,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 358. [2021-08-06 20:01:09,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 2.6330532212885154) internal successors, (940), 357 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:09,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 940 transitions. [2021-08-06 20:01:09,935 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 940 transitions. Word has length 25 [2021-08-06 20:01:09,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:01:09,936 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 940 transitions. [2021-08-06 20:01:09,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 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) [2021-08-06 20:01:09,936 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 940 transitions. [2021-08-06 20:01:09,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 20:01:09,937 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:01:09,937 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:01:09,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-06 20:01:09,937 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:01:09,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:01:09,937 INFO L82 PathProgramCache]: Analyzing trace with hash 94324383, now seen corresponding path program 2 times [2021-08-06 20:01:09,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:01:09,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550912533] [2021-08-06 20:01:09,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:01:09,938 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:01:09,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:09,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:01:09,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:01:09,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550912533] [2021-08-06 20:01:09,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550912533] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:09,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971106375] [2021-08-06 20:01:09,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:01:09,969 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:09,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:01:09,970 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:01:09,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-06 20:01:10,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:01:10,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:01:10,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-06 20:01:10,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:01:10,124 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:01:10,125 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:01:10,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:01:10,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971106375] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:10,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:01:10,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-08-06 20:01:10,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294939072] [2021-08-06 20:01:10,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 20:01:10,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:01:10,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 20:01:10,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-06 20:01:10,168 INFO L87 Difference]: Start difference. First operand 358 states and 940 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:10,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:01:10,207 INFO L93 Difference]: Finished difference Result 406 states and 1046 transitions. [2021-08-06 20:01:10,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 20:01:10,208 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 20:01:10,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:01:10,209 INFO L225 Difference]: With dead ends: 406 [2021-08-06 20:01:10,209 INFO L226 Difference]: Without dead ends: 390 [2021-08-06 20:01:10,210 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 21.0ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-06 20:01:10,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-08-06 20:01:10,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 326. [2021-08-06 20:01:10,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.596923076923077) internal successors, (844), 325 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:10,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 844 transitions. [2021-08-06 20:01:10,216 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 844 transitions. Word has length 25 [2021-08-06 20:01:10,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:01:10,216 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 844 transitions. [2021-08-06 20:01:10,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:10,216 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 844 transitions. [2021-08-06 20:01:10,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 20:01:10,217 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:01:10,217 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:01:10,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-06 20:01:10,433 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,SelfDestructingSolverStorable8 [2021-08-06 20:01:10,434 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:01:10,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:01:10,435 INFO L82 PathProgramCache]: Analyzing trace with hash 575314945, now seen corresponding path program 1 times [2021-08-06 20:01:10,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:01:10,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393026585] [2021-08-06 20:01:10,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:01:10,435 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:01:10,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:10,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:01:10,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:01:10,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393026585] [2021-08-06 20:01:10,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393026585] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:10,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784566172] [2021-08-06 20:01:10,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:01:10,487 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:10,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:01:10,488 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:01:10,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-06 20:01:10,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:10,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-06 20:01:10,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:01:10,641 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:01:10,642 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:01:10,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:01:10,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784566172] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:10,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:01:10,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-08-06 20:01:10,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783376154] [2021-08-06 20:01:10,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 20:01:10,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:01:10,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 20:01:10,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-06 20:01:10,676 INFO L87 Difference]: Start difference. First operand 326 states and 844 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:10,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:01:10,730 INFO L93 Difference]: Finished difference Result 473 states and 1214 transitions. [2021-08-06 20:01:10,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 20:01:10,730 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 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 27 [2021-08-06 20:01:10,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:01:10,732 INFO L225 Difference]: With dead ends: 473 [2021-08-06 20:01:10,732 INFO L226 Difference]: Without dead ends: 473 [2021-08-06 20:01:10,732 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 35.7ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-08-06 20:01:10,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-08-06 20:01:10,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 366. [2021-08-06 20:01:10,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.684931506849315) internal successors, (980), 365 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:10,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 980 transitions. [2021-08-06 20:01:10,739 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 980 transitions. Word has length 27 [2021-08-06 20:01:10,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:01:10,739 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 980 transitions. [2021-08-06 20:01:10,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:10,740 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 980 transitions. [2021-08-06 20:01:10,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 20:01:10,740 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:01:10,741 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:01:10,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-06 20:01:10,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:10,958 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:01:10,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:01:10,958 INFO L82 PathProgramCache]: Analyzing trace with hash 569427363, now seen corresponding path program 1 times [2021-08-06 20:01:10,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:01:10,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735171761] [2021-08-06 20:01:10,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:01:10,958 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:01:10,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:11,041 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 75.0 percent of original size [2021-08-06 20:01:11,048 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 75.0 percent of original size [2021-08-06 20:01:11,070 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 84.0 percent of original size [2021-08-06 20:01:11,072 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 84.0 percent of original size [2021-08-06 20:01:11,097 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 89.1 percent of original size [2021-08-06 20:01:11,101 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 89.1 percent of original size [2021-08-06 20:01:11,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:01:11,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:01:11,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735171761] [2021-08-06 20:01:11,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735171761] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:11,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785651951] [2021-08-06 20:01:11,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:01:11,133 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:11,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:01:11,134 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:01:11,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-06 20:01:11,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:11,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 20:01:11,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:01:11,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 16 treesize of output 11 [2021-08-06 20:01:11,463 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 13 treesize of output 9 [2021-08-06 20:01:11,486 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 24.1 percent of original size [2021-08-06 20:01:11,487 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 24.1 percent of original size [2021-08-06 20:01:11,538 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:01:11,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785651951] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:11,539 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:01:11,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-06 20:01:11,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217126550] [2021-08-06 20:01:11,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:01:11,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:01:11,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:01:11,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:01:11,540 INFO L87 Difference]: Start difference. First operand 366 states and 980 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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) [2021-08-06 20:01:11,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:01:11,719 INFO L93 Difference]: Finished difference Result 953 states and 2489 transitions. [2021-08-06 20:01:11,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 20:01:11,720 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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 29 [2021-08-06 20:01:11,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:01:11,722 INFO L225 Difference]: With dead ends: 953 [2021-08-06 20:01:11,723 INFO L226 Difference]: Without dead ends: 569 [2021-08-06 20:01:11,723 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 121.0ms TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:01:11,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-08-06 20:01:11,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 412. [2021-08-06 20:01:11,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 2.6520681265206814) internal successors, (1090), 411 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:11,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 1090 transitions. [2021-08-06 20:01:11,732 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 1090 transitions. Word has length 29 [2021-08-06 20:01:11,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:01:11,732 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 1090 transitions. [2021-08-06 20:01:11,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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) [2021-08-06 20:01:11,732 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 1090 transitions. [2021-08-06 20:01:11,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 20:01:11,733 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:01:11,733 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:01:11,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-06 20:01:11,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:11,947 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:01:11,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:01:11,947 INFO L82 PathProgramCache]: Analyzing trace with hash -187053597, now seen corresponding path program 2 times [2021-08-06 20:01:11,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:01:11,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278536517] [2021-08-06 20:01:11,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:01:11,948 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:01:11,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:11,980 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 84.5 percent of original size [2021-08-06 20:01:11,986 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 84.5 percent of original size [2021-08-06 20:01:12,012 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 80.4 percent of original size [2021-08-06 20:01:12,014 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 80.4 percent of original size [2021-08-06 20:01:12,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:01:12,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:01:12,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278536517] [2021-08-06 20:01:12,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278536517] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:12,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565386319] [2021-08-06 20:01:12,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:01:12,056 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:12,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:01:12,063 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:01:12,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-06 20:01:12,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:01:12,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:01:12,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 20:01:12,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:01:12,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 20:01:12,379 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 18.5 percent of original size [2021-08-06 20:01:12,381 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 18.5 percent of original size [2021-08-06 20:01:12,422 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:01:12,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565386319] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:12,423 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:01:12,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 20:01:12,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581524797] [2021-08-06 20:01:12,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:01:12,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:01:12,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:01:12,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:01:12,424 INFO L87 Difference]: Start difference. First operand 412 states and 1090 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:12,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:01:12,728 INFO L93 Difference]: Finished difference Result 1228 states and 3233 transitions. [2021-08-06 20:01:12,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 20:01:12,729 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 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 29 [2021-08-06 20:01:12,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:01:12,731 INFO L225 Difference]: With dead ends: 1228 [2021-08-06 20:01:12,731 INFO L226 Difference]: Without dead ends: 628 [2021-08-06 20:01:12,732 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 174.0ms TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2021-08-06 20:01:12,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-08-06 20:01:12,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 362. [2021-08-06 20:01:12,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.6786703601108033) internal successors, (967), 361 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:12,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 967 transitions. [2021-08-06 20:01:12,739 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 967 transitions. Word has length 29 [2021-08-06 20:01:12,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:01:12,739 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 967 transitions. [2021-08-06 20:01:12,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:12,739 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 967 transitions. [2021-08-06 20:01:12,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 20:01:12,740 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:01:12,744 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:01:12,764 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-08-06 20:01:12,945 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,SelfDestructingSolverStorable11 [2021-08-06 20:01:12,945 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:01:12,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:01:12,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1443745437, now seen corresponding path program 3 times [2021-08-06 20:01:12,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:01:12,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388728679] [2021-08-06 20:01:12,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:01:12,946 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:01:12,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:12,985 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 34, result has 52.8 percent of original size [2021-08-06 20:01:12,988 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 34, result has 52.8 percent of original size [2021-08-06 20:01:13,004 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 39.1 percent of original size [2021-08-06 20:01:13,005 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 39.1 percent of original size [2021-08-06 20:01:13,039 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:01:13,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:01:13,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388728679] [2021-08-06 20:01:13,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388728679] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:13,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722898527] [2021-08-06 20:01:13,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:01:13,040 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:13,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:01:13,041 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:01:13,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-06 20:01:13,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:01:13,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:01:13,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 20:01:13,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:01:13,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 10 treesize of output 7 [2021-08-06 20:01:13,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 20:01:13,418 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 18.5 percent of original size [2021-08-06 20:01:13,419 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 18.5 percent of original size [2021-08-06 20:01:13,451 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:01:13,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722898527] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:13,451 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:01:13,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-06 20:01:13,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889251716] [2021-08-06 20:01:13,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:01:13,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:01:13,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:01:13,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:01:13,453 INFO L87 Difference]: Start difference. First operand 362 states and 967 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:13,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:01:13,613 INFO L93 Difference]: Finished difference Result 833 states and 2199 transitions. [2021-08-06 20:01:13,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 20:01:13,613 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 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 29 [2021-08-06 20:01:13,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:01:13,615 INFO L225 Difference]: With dead ends: 833 [2021-08-06 20:01:13,615 INFO L226 Difference]: Without dead ends: 418 [2021-08-06 20:01:13,615 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 119.2ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:01:13,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-08-06 20:01:13,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 270. [2021-08-06 20:01:13,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.550185873605948) internal successors, (686), 269 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:13,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 686 transitions. [2021-08-06 20:01:13,621 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 686 transitions. Word has length 29 [2021-08-06 20:01:13,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:01:13,621 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 686 transitions. [2021-08-06 20:01:13,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:13,621 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 686 transitions. [2021-08-06 20:01:13,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 20:01:13,622 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:01:13,622 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:01:13,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-06 20:01:13,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:13,839 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:01:13,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:01:13,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1130953309, now seen corresponding path program 4 times [2021-08-06 20:01:13,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:01:13,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953274678] [2021-08-06 20:01:13,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:01:13,840 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:01:13,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:13,884 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 86.4 percent of original size [2021-08-06 20:01:13,890 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 86.4 percent of original size [2021-08-06 20:01:13,938 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 78.7 percent of original size [2021-08-06 20:01:13,941 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 78.7 percent of original size [2021-08-06 20:01:13,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:01:13,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:01:13,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953274678] [2021-08-06 20:01:13,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953274678] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:13,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846850661] [2021-08-06 20:01:13,970 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:01:13,971 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:13,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:01:13,971 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:01:13,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-06 20:01:14,124 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:01:14,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:01:14,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 20:01:14,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:01:14,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 16 treesize of output 11 [2021-08-06 20:01:14,335 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 55.6 percent of original size [2021-08-06 20:01:14,336 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 55.6 percent of original size [2021-08-06 20:01:14,344 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 13 treesize of output 9 [2021-08-06 20:01:14,365 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 24.1 percent of original size [2021-08-06 20:01:14,366 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 24.1 percent of original size [2021-08-06 20:01:14,397 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:01:14,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846850661] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:14,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:01:14,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-06 20:01:14,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604663655] [2021-08-06 20:01:14,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 20:01:14,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:01:14,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 20:01:14,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-06 20:01:14,398 INFO L87 Difference]: Start difference. First operand 270 states and 686 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:14,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:01:14,520 INFO L93 Difference]: Finished difference Result 647 states and 1648 transitions. [2021-08-06 20:01:14,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 20:01:14,520 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 20:01:14,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:01:14,521 INFO L225 Difference]: With dead ends: 647 [2021-08-06 20:01:14,522 INFO L226 Difference]: Without dead ends: 306 [2021-08-06 20:01:14,522 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 83.2ms TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:01:14,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-08-06 20:01:14,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 286. [2021-08-06 20:01:14,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.4947368421052634) internal successors, (711), 285 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:14,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 711 transitions. [2021-08-06 20:01:14,526 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 711 transitions. Word has length 29 [2021-08-06 20:01:14,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:01:14,527 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 711 transitions. [2021-08-06 20:01:14,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:14,527 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 711 transitions. [2021-08-06 20:01:14,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:01:14,527 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:01:14,527 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:01:14,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-06 20:01:14,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:14,745 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:01:14,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:01:14,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1977083259, now seen corresponding path program 5 times [2021-08-06 20:01:14,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:01:14,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274618345] [2021-08-06 20:01:14,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:01:14,745 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:01:14,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:14,775 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:01:14,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:01:14,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274618345] [2021-08-06 20:01:14,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274618345] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:14,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213775620] [2021-08-06 20:01:14,776 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:01:14,776 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:14,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:01:14,777 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:01:14,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-06 20:01:14,946 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:01:14,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:01:14,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 20:01:14,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:01:15,015 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:01:15,015 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:01:15,069 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:01:15,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213775620] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:15,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:01:15,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-06 20:01:15,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319828402] [2021-08-06 20:01:15,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 20:01:15,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:01:15,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 20:01:15,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-06 20:01:15,070 INFO L87 Difference]: Start difference. First operand 286 states and 711 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:15,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:01:15,124 INFO L93 Difference]: Finished difference Result 630 states and 1581 transitions. [2021-08-06 20:01:15,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 20:01:15,124 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 20:01:15,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:01:15,127 INFO L225 Difference]: With dead ends: 630 [2021-08-06 20:01:15,127 INFO L226 Difference]: Without dead ends: 628 [2021-08-06 20:01:15,127 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 18.7ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-06 20:01:15,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-08-06 20:01:15,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 414. [2021-08-06 20:01:15,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 2.7796610169491527) internal successors, (1148), 413 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:15,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 1148 transitions. [2021-08-06 20:01:15,135 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 1148 transitions. Word has length 31 [2021-08-06 20:01:15,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:01:15,135 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 1148 transitions. [2021-08-06 20:01:15,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:15,135 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 1148 transitions. [2021-08-06 20:01:15,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:01:15,136 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:01:15,136 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:01:15,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-06 20:01:15,353 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,SelfDestructingSolverStorable14 [2021-08-06 20:01:15,353 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:01:15,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:01:15,354 INFO L82 PathProgramCache]: Analyzing trace with hash 716984965, now seen corresponding path program 6 times [2021-08-06 20:01:15,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:01:15,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457643268] [2021-08-06 20:01:15,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:01:15,354 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:01:15,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:15,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:01:15,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:01:15,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457643268] [2021-08-06 20:01:15,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457643268] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:15,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164293161] [2021-08-06 20:01:15,403 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:01:15,403 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:15,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:01:15,415 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:01:15,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-06 20:01:15,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:01:15,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:01:15,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 20:01:15,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:01:15,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:01:15,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164293161] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:15,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:01:15,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-06 20:01:15,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849006374] [2021-08-06 20:01:15,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 20:01:15,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:01:15,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 20:01:15,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-06 20:01:15,868 INFO L87 Difference]: Start difference. First operand 414 states and 1148 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:16,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:01:16,455 INFO L93 Difference]: Finished difference Result 1986 states and 5213 transitions. [2021-08-06 20:01:16,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-06 20:01:16,469 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 20:01:16,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:01:16,477 INFO L225 Difference]: With dead ends: 1986 [2021-08-06 20:01:16,477 INFO L226 Difference]: Without dead ends: 1986 [2021-08-06 20:01:16,478 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 412.7ms TimeCoverageRelationStatistics Valid=424, Invalid=1382, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 20:01:16,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1986 states. [2021-08-06 20:01:16,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1986 to 690. [2021-08-06 20:01:16,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 689 states have (on average 3.0595065312046446) internal successors, (2108), 689 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:16,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 2108 transitions. [2021-08-06 20:01:16,525 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 2108 transitions. Word has length 31 [2021-08-06 20:01:16,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:01:16,525 INFO L470 AbstractCegarLoop]: Abstraction has 690 states and 2108 transitions. [2021-08-06 20:01:16,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:16,525 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 2108 transitions. [2021-08-06 20:01:16,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 20:01:16,526 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:01:16,526 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:01:16,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-06 20:01:16,727 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,SelfDestructingSolverStorable15 [2021-08-06 20:01:16,727 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:01:16,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:01:16,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1450283909, now seen corresponding path program 7 times [2021-08-06 20:01:16,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:01:16,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560388441] [2021-08-06 20:01:16,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:01:16,727 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:01:16,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:16,764 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:01:16,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:01:16,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560388441] [2021-08-06 20:01:16,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560388441] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:16,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752083042] [2021-08-06 20:01:16,764 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:01:16,764 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:16,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:01:16,765 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:01:16,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-06 20:01:16,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:16,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 20:01:16,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:01:17,111 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:01:17,112 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:01:17,138 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:01:17,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752083042] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:17,139 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:01:17,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-06 20:01:17,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025178291] [2021-08-06 20:01:17,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 20:01:17,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:01:17,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 20:01:17,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-06 20:01:17,140 INFO L87 Difference]: Start difference. First operand 690 states and 2108 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:17,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:01:17,220 INFO L93 Difference]: Finished difference Result 985 states and 2855 transitions. [2021-08-06 20:01:17,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 20:01:17,221 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 20:01:17,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:01:17,224 INFO L225 Difference]: With dead ends: 985 [2021-08-06 20:01:17,224 INFO L226 Difference]: Without dead ends: 985 [2021-08-06 20:01:17,224 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 36.2ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:01:17,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2021-08-06 20:01:17,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 789. [2021-08-06 20:01:17,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 788 states have (on average 3.0736040609137056) internal successors, (2422), 788 states have internal predecessors, (2422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:17,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 2422 transitions. [2021-08-06 20:01:17,241 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 2422 transitions. Word has length 33 [2021-08-06 20:01:17,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:01:17,241 INFO L470 AbstractCegarLoop]: Abstraction has 789 states and 2422 transitions. [2021-08-06 20:01:17,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:17,241 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 2422 transitions. [2021-08-06 20:01:17,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 20:01:17,242 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:01:17,242 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:01:17,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-06 20:01:17,456 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,SelfDestructingSolverStorable16 [2021-08-06 20:01:17,457 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:01:17,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:01:17,457 INFO L82 PathProgramCache]: Analyzing trace with hash 80646951, now seen corresponding path program 8 times [2021-08-06 20:01:17,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:01:17,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724939363] [2021-08-06 20:01:17,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:01:17,457 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:01:17,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:17,487 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:01:17,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:01:17,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724939363] [2021-08-06 20:01:17,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724939363] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:17,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963724096] [2021-08-06 20:01:17,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:01:17,488 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:17,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:01:17,488 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:01:17,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-06 20:01:17,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:01:17,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:01:17,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 20:01:17,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:01:17,751 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:01:17,752 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:01:17,809 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:01:17,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963724096] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:17,809 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:01:17,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-06 20:01:17,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900871935] [2021-08-06 20:01:17,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 20:01:17,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:01:17,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 20:01:17,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-06 20:01:17,810 INFO L87 Difference]: Start difference. First operand 789 states and 2422 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:17,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:01:17,882 INFO L93 Difference]: Finished difference Result 1441 states and 4235 transitions. [2021-08-06 20:01:17,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 20:01:17,882 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 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 33 [2021-08-06 20:01:17,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:01:17,887 INFO L225 Difference]: With dead ends: 1441 [2021-08-06 20:01:17,887 INFO L226 Difference]: Without dead ends: 1435 [2021-08-06 20:01:17,888 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 27.3ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-06 20:01:17,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1435 states. [2021-08-06 20:01:17,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1435 to 1083. [2021-08-06 20:01:17,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1083 states, 1082 states have (on average 3.2181146025878005) internal successors, (3482), 1082 states have internal predecessors, (3482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:17,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1083 states to 1083 states and 3482 transitions. [2021-08-06 20:01:17,909 INFO L78 Accepts]: Start accepts. Automaton has 1083 states and 3482 transitions. Word has length 33 [2021-08-06 20:01:17,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:01:17,909 INFO L470 AbstractCegarLoop]: Abstraction has 1083 states and 3482 transitions. [2021-08-06 20:01:17,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:17,909 INFO L276 IsEmpty]: Start isEmpty. Operand 1083 states and 3482 transitions. [2021-08-06 20:01:17,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 20:01:17,911 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:01:17,911 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:01:17,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-06 20:01:18,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-06 20:01:18,129 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:01:18,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:01:18,129 INFO L82 PathProgramCache]: Analyzing trace with hash 485294887, now seen corresponding path program 9 times [2021-08-06 20:01:18,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:01:18,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495247156] [2021-08-06 20:01:18,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:01:18,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:01:18,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:18,158 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:01:18,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:01:18,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495247156] [2021-08-06 20:01:18,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495247156] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:18,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626649468] [2021-08-06 20:01:18,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:01:18,159 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:18,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:01:18,159 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:01:18,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-06 20:01:18,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:01:18,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:01:18,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 20:01:18,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:01:18,524 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:01:18,525 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:01:18,569 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:01:18,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626649468] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:18,569 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:01:18,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-06 20:01:18,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435823727] [2021-08-06 20:01:18,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 20:01:18,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:01:18,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 20:01:18,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-08-06 20:01:18,570 INFO L87 Difference]: Start difference. First operand 1083 states and 3482 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:19,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:01:19,055 INFO L93 Difference]: Finished difference Result 3227 states and 9712 transitions. [2021-08-06 20:01:19,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 20:01:19,056 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 20:01:19,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:01:19,067 INFO L225 Difference]: With dead ends: 3227 [2021-08-06 20:01:19,067 INFO L226 Difference]: Without dead ends: 3075 [2021-08-06 20:01:19,067 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 278.7ms TimeCoverageRelationStatistics Valid=329, Invalid=1077, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 20:01:19,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3075 states. [2021-08-06 20:01:19,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3075 to 2059. [2021-08-06 20:01:19,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2059 states, 2058 states have (on average 3.3751214771622933) internal successors, (6946), 2058 states have internal predecessors, (6946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:19,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2059 states to 2059 states and 6946 transitions. [2021-08-06 20:01:19,142 INFO L78 Accepts]: Start accepts. Automaton has 2059 states and 6946 transitions. Word has length 33 [2021-08-06 20:01:19,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:01:19,143 INFO L470 AbstractCegarLoop]: Abstraction has 2059 states and 6946 transitions. [2021-08-06 20:01:19,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:19,143 INFO L276 IsEmpty]: Start isEmpty. Operand 2059 states and 6946 transitions. [2021-08-06 20:01:19,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:01:19,147 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:01:19,147 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:01:19,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-06 20:01:19,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:19,362 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:01:19,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:01:19,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1440681417, now seen corresponding path program 10 times [2021-08-06 20:01:19,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:01:19,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055580066] [2021-08-06 20:01:19,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:01:19,363 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:01:19,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:19,419 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 90.8 percent of original size [2021-08-06 20:01:19,422 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 90.8 percent of original size [2021-08-06 20:01:19,455 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 39.1 percent of original size [2021-08-06 20:01:19,455 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 39.1 percent of original size [2021-08-06 20:01:19,466 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 83.1 percent of original size [2021-08-06 20:01:19,469 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 83.1 percent of original size [2021-08-06 20:01:19,499 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 55.6 percent of original size [2021-08-06 20:01:19,499 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 55.6 percent of original size [2021-08-06 20:01:19,515 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:01:19,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:01:19,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055580066] [2021-08-06 20:01:19,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055580066] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:19,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844178473] [2021-08-06 20:01:19,516 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:01:19,516 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:19,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:01:19,529 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:01:19,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-06 20:01:19,750 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:01:19,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:01:19,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 20:01:19,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:01:19,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 14 treesize of output 9 [2021-08-06 20:01:20,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-08-06 20:01:20,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 37 [2021-08-06 20:01:20,372 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 18.5 percent of original size [2021-08-06 20:01:20,373 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 18.5 percent of original size [2021-08-06 20:01:20,409 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:01:20,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844178473] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:20,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:01:20,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-08-06 20:01:20,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881595118] [2021-08-06 20:01:20,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:01:20,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:01:20,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:01:20,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:01:20,411 INFO L87 Difference]: Start difference. First operand 2059 states and 6946 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:21,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:01:21,127 INFO L93 Difference]: Finished difference Result 5140 states and 16530 transitions. [2021-08-06 20:01:21,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 20:01:21,128 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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 35 [2021-08-06 20:01:21,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:01:21,159 INFO L225 Difference]: With dead ends: 5140 [2021-08-06 20:01:21,159 INFO L226 Difference]: Without dead ends: 2987 [2021-08-06 20:01:21,160 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 373.5ms TimeCoverageRelationStatistics Valid=186, Invalid=744, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:01:21,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2987 states. [2021-08-06 20:01:21,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2987 to 2116. [2021-08-06 20:01:21,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2116 states, 2115 states have (on average 3.3286052009456264) internal successors, (7040), 2115 states have internal predecessors, (7040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:21,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2116 states to 2116 states and 7040 transitions. [2021-08-06 20:01:21,256 INFO L78 Accepts]: Start accepts. Automaton has 2116 states and 7040 transitions. Word has length 35 [2021-08-06 20:01:21,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:01:21,257 INFO L470 AbstractCegarLoop]: Abstraction has 2116 states and 7040 transitions. [2021-08-06 20:01:21,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:21,257 INFO L276 IsEmpty]: Start isEmpty. Operand 2116 states and 7040 transitions. [2021-08-06 20:01:21,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:01:21,261 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:01:21,261 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:01:21,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-06 20:01:21,477 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,SelfDestructingSolverStorable19 [2021-08-06 20:01:21,477 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:01:21,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:01:21,478 INFO L82 PathProgramCache]: Analyzing trace with hash 882180617, now seen corresponding path program 11 times [2021-08-06 20:01:21,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:01:21,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019331829] [2021-08-06 20:01:21,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:01:21,478 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:01:21,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:21,533 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 83.5 percent of original size [2021-08-06 20:01:21,543 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 83.5 percent of original size [2021-08-06 20:01:21,591 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 89.7 percent of original size [2021-08-06 20:01:21,593 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 89.7 percent of original size [2021-08-06 20:01:21,622 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 89.7 percent of original size [2021-08-06 20:01:21,624 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 89.7 percent of original size [2021-08-06 20:01:21,653 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 78.7 percent of original size [2021-08-06 20:01:21,669 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 78.7 percent of original size [2021-08-06 20:01:21,714 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:01:21,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:01:21,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019331829] [2021-08-06 20:01:21,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019331829] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:21,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798979994] [2021-08-06 20:01:21,714 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:01:21,715 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:21,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:01:21,715 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:01:21,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-06 20:01:21,963 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:01:21,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:01:21,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 20:01:21,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:01:22,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 20:01:22,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 30 [2021-08-06 20:01:22,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2021-08-06 20:01:22,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 37 [2021-08-06 20:01:22,630 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 24.1 percent of original size [2021-08-06 20:01:22,631 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 24.1 percent of original size [2021-08-06 20:01:22,662 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:01:22,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798979994] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:22,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:01:22,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-08-06 20:01:22,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666857178] [2021-08-06 20:01:22,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 20:01:22,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:01:22,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 20:01:22,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:01:22,664 INFO L87 Difference]: Start difference. First operand 2116 states and 7040 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 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) [2021-08-06 20:01:23,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:01:23,096 INFO L93 Difference]: Finished difference Result 4319 states and 14042 transitions. [2021-08-06 20:01:23,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 20:01:23,096 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 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) Word has length 35 [2021-08-06 20:01:23,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:01:23,105 INFO L225 Difference]: With dead ends: 4319 [2021-08-06 20:01:23,105 INFO L226 Difference]: Without dead ends: 2212 [2021-08-06 20:01:23,105 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 359.1ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-08-06 20:01:23,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2212 states. [2021-08-06 20:01:23,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2212 to 2134. [2021-08-06 20:01:23,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2134 states, 2133 states have (on average 3.3122362869198314) internal successors, (7065), 2133 states have internal predecessors, (7065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:23,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2134 states to 2134 states and 7065 transitions. [2021-08-06 20:01:23,141 INFO L78 Accepts]: Start accepts. Automaton has 2134 states and 7065 transitions. Word has length 35 [2021-08-06 20:01:23,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:01:23,141 INFO L470 AbstractCegarLoop]: Abstraction has 2134 states and 7065 transitions. [2021-08-06 20:01:23,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 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) [2021-08-06 20:01:23,141 INFO L276 IsEmpty]: Start isEmpty. Operand 2134 states and 7065 transitions. [2021-08-06 20:01:23,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 20:01:23,145 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:01:23,145 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:01:23,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-06 20:01:23,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:23,361 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:01:23,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:01:23,361 INFO L82 PathProgramCache]: Analyzing trace with hash -327062237, now seen corresponding path program 12 times [2021-08-06 20:01:23,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:01:23,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012298978] [2021-08-06 20:01:23,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:01:23,361 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:01:23,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:23,408 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:01:23,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:01:23,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012298978] [2021-08-06 20:01:23,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012298978] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:23,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678287571] [2021-08-06 20:01:23,408 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:01:23,408 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:23,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:01:23,423 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:01:23,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-06 20:01:23,738 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 20:01:23,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:01:23,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:01:23,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:01:23,826 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:01:23,836 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:01:23,906 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 20:01:23,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678287571] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:23,907 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:01:23,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-06 20:01:23,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432559619] [2021-08-06 20:01:23,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 20:01:23,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:01:23,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 20:01:23,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-06 20:01:23,913 INFO L87 Difference]: Start difference. First operand 2134 states and 7065 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:23,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:01:23,999 INFO L93 Difference]: Finished difference Result 4229 states and 13294 transitions. [2021-08-06 20:01:24,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 20:01:24,000 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 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 37 [2021-08-06 20:01:24,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:01:24,022 INFO L225 Difference]: With dead ends: 4229 [2021-08-06 20:01:24,022 INFO L226 Difference]: Without dead ends: 4221 [2021-08-06 20:01:24,022 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 25.6ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-06 20:01:24,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4221 states. [2021-08-06 20:01:24,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4221 to 2802. [2021-08-06 20:01:24,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2802 states, 2801 states have (on average 3.444484112816851) internal successors, (9648), 2801 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:24,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2802 states to 2802 states and 9648 transitions. [2021-08-06 20:01:24,236 INFO L78 Accepts]: Start accepts. Automaton has 2802 states and 9648 transitions. Word has length 37 [2021-08-06 20:01:24,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:01:24,236 INFO L470 AbstractCegarLoop]: Abstraction has 2802 states and 9648 transitions. [2021-08-06 20:01:24,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:24,237 INFO L276 IsEmpty]: Start isEmpty. Operand 2802 states and 9648 transitions. [2021-08-06 20:01:24,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 20:01:24,262 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:01:24,262 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:01:24,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-06 20:01:24,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:24,480 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:01:24,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:01:24,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1192778461, now seen corresponding path program 13 times [2021-08-06 20:01:24,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:01:24,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855709320] [2021-08-06 20:01:24,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:01:24,481 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:01:24,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:24,534 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 20:01:24,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:01:24,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855709320] [2021-08-06 20:01:24,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855709320] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:24,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155524927] [2021-08-06 20:01:24,535 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:01:24,535 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:24,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:01:24,536 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:01:24,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-06 20:01:24,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:24,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:01:24,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:01:24,924 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:01:24,925 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:01:24,984 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 20:01:24,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155524927] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:24,984 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:01:24,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-06 20:01:24,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230780032] [2021-08-06 20:01:24,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 20:01:24,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:01:24,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 20:01:24,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-06 20:01:24,985 INFO L87 Difference]: Start difference. First operand 2802 states and 9648 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:25,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:01:25,067 INFO L93 Difference]: Finished difference Result 3998 states and 12712 transitions. [2021-08-06 20:01:25,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 20:01:25,068 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 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 37 [2021-08-06 20:01:25,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:01:25,078 INFO L225 Difference]: With dead ends: 3998 [2021-08-06 20:01:25,078 INFO L226 Difference]: Without dead ends: 3998 [2021-08-06 20:01:25,079 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 45.8ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:01:25,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3998 states. [2021-08-06 20:01:25,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3998 to 2368. [2021-08-06 20:01:25,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2368 states, 2367 states have (on average 3.3396704689480354) internal successors, (7905), 2367 states have internal predecessors, (7905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:25,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2368 states to 2368 states and 7905 transitions. [2021-08-06 20:01:25,128 INFO L78 Accepts]: Start accepts. Automaton has 2368 states and 7905 transitions. Word has length 37 [2021-08-06 20:01:25,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:01:25,128 INFO L470 AbstractCegarLoop]: Abstraction has 2368 states and 7905 transitions. [2021-08-06 20:01:25,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:25,129 INFO L276 IsEmpty]: Start isEmpty. Operand 2368 states and 7905 transitions. [2021-08-06 20:01:25,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 20:01:25,133 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:01:25,133 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:01:25,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-06 20:01:25,350 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,SelfDestructingSolverStorable22 [2021-08-06 20:01:25,350 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:01:25,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:01:25,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1719251617, now seen corresponding path program 14 times [2021-08-06 20:01:25,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:01:25,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316425929] [2021-08-06 20:01:25,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:01:25,351 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:01:25,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:25,401 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:01:25,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:01:25,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316425929] [2021-08-06 20:01:25,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316425929] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:25,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989669478] [2021-08-06 20:01:25,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:01:25,401 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:25,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:01:25,402 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:01:25,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-06 20:01:25,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:01:25,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:01:25,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:01:25,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:01:25,804 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:01:25,805 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:01:25,863 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:01:25,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989669478] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:25,863 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:01:25,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-06 20:01:25,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519705664] [2021-08-06 20:01:25,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 20:01:25,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:01:25,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 20:01:25,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-06 20:01:25,864 INFO L87 Difference]: Start difference. First operand 2368 states and 7905 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:25,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:01:25,961 INFO L93 Difference]: Finished difference Result 3698 states and 11480 transitions. [2021-08-06 20:01:25,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 20:01:25,961 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 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 37 [2021-08-06 20:01:25,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:01:25,969 INFO L225 Difference]: With dead ends: 3698 [2021-08-06 20:01:25,970 INFO L226 Difference]: Without dead ends: 3698 [2021-08-06 20:01:25,970 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 42.6ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:01:25,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3698 states. [2021-08-06 20:01:26,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3698 to 1920. [2021-08-06 20:01:26,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1920 states, 1919 states have (on average 3.2454403335070348) internal successors, (6228), 1919 states have internal predecessors, (6228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:26,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1920 states to 1920 states and 6228 transitions. [2021-08-06 20:01:26,018 INFO L78 Accepts]: Start accepts. Automaton has 1920 states and 6228 transitions. Word has length 37 [2021-08-06 20:01:26,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:01:26,018 INFO L470 AbstractCegarLoop]: Abstraction has 1920 states and 6228 transitions. [2021-08-06 20:01:26,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:26,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1920 states and 6228 transitions. [2021-08-06 20:01:26,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 20:01:26,022 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:01:26,022 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:01:26,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-06 20:01:26,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:26,240 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:01:26,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:01:26,240 INFO L82 PathProgramCache]: Analyzing trace with hash 549895399, now seen corresponding path program 15 times [2021-08-06 20:01:26,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:01:26,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044155479] [2021-08-06 20:01:26,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:01:26,240 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:01:26,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:26,296 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:01:26,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:01:26,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044155479] [2021-08-06 20:01:26,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044155479] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:26,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982996043] [2021-08-06 20:01:26,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:01:26,296 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:26,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:01:26,297 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:01:26,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-06 20:01:26,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:01:26,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:01:26,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:01:26,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:01:26,716 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:01:26,716 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:01:26,774 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 20:01:26,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982996043] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:26,775 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:01:26,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-06 20:01:26,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533032893] [2021-08-06 20:01:26,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 20:01:26,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:01:26,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 20:01:26,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-06 20:01:26,776 INFO L87 Difference]: Start difference. First operand 1920 states and 6228 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:26,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:01:26,880 INFO L93 Difference]: Finished difference Result 2614 states and 7812 transitions. [2021-08-06 20:01:26,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 20:01:26,881 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 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 37 [2021-08-06 20:01:26,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:01:26,888 INFO L225 Difference]: With dead ends: 2614 [2021-08-06 20:01:26,888 INFO L226 Difference]: Without dead ends: 2602 [2021-08-06 20:01:26,888 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 48.3ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:01:26,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2602 states. [2021-08-06 20:01:26,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2602 to 1706. [2021-08-06 20:01:26,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1706 states, 1705 states have (on average 3.1870967741935483) internal successors, (5434), 1705 states have internal predecessors, (5434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:26,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1706 states to 1706 states and 5434 transitions. [2021-08-06 20:01:26,919 INFO L78 Accepts]: Start accepts. Automaton has 1706 states and 5434 transitions. Word has length 37 [2021-08-06 20:01:26,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:01:26,919 INFO L470 AbstractCegarLoop]: Abstraction has 1706 states and 5434 transitions. [2021-08-06 20:01:26,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:26,920 INFO L276 IsEmpty]: Start isEmpty. Operand 1706 states and 5434 transitions. [2021-08-06 20:01:26,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 20:01:26,922 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:01:26,923 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:01:26,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-06 20:01:27,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:27,140 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:01:27,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:01:27,141 INFO L82 PathProgramCache]: Analyzing trace with hash 2061244349, now seen corresponding path program 16 times [2021-08-06 20:01:27,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:01:27,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014618154] [2021-08-06 20:01:27,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:01:27,141 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:01:27,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:27,206 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:01:27,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:01:27,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014618154] [2021-08-06 20:01:27,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014618154] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:27,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42068153] [2021-08-06 20:01:27,207 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:01:27,207 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:27,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:01:27,208 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:01:27,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-06 20:01:27,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:01:27,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:01:27,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:01:27,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:01:27,670 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:01:27,671 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:01:27,720 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:01:27,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42068153] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:27,720 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:01:27,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 20:01:27,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765951669] [2021-08-06 20:01:27,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:01:27,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:01:27,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:01:27,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:01:27,721 INFO L87 Difference]: Start difference. First operand 1706 states and 5434 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 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) [2021-08-06 20:01:27,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:01:27,918 INFO L93 Difference]: Finished difference Result 4450 states and 13958 transitions. [2021-08-06 20:01:27,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 20:01:27,918 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 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 37 [2021-08-06 20:01:27,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:01:27,927 INFO L225 Difference]: With dead ends: 4450 [2021-08-06 20:01:27,927 INFO L226 Difference]: Without dead ends: 4230 [2021-08-06 20:01:27,927 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 110.3ms TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:01:27,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4230 states. [2021-08-06 20:01:27,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4230 to 2294. [2021-08-06 20:01:27,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2294 states, 2293 states have (on average 3.2699520279110335) internal successors, (7498), 2293 states have internal predecessors, (7498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:27,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2294 states to 2294 states and 7498 transitions. [2021-08-06 20:01:27,975 INFO L78 Accepts]: Start accepts. Automaton has 2294 states and 7498 transitions. Word has length 37 [2021-08-06 20:01:27,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:01:27,975 INFO L470 AbstractCegarLoop]: Abstraction has 2294 states and 7498 transitions. [2021-08-06 20:01:27,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 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) [2021-08-06 20:01:27,975 INFO L276 IsEmpty]: Start isEmpty. Operand 2294 states and 7498 transitions. [2021-08-06 20:01:27,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 20:01:27,979 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:01:27,979 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:01:27,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-06 20:01:28,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:28,197 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:01:28,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:01:28,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1280458587, now seen corresponding path program 17 times [2021-08-06 20:01:28,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:01:28,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725275878] [2021-08-06 20:01:28,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:01:28,197 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:01:28,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:28,238 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-06 20:01:28,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:01:28,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725275878] [2021-08-06 20:01:28,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725275878] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:28,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493849746] [2021-08-06 20:01:28,239 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:01:28,239 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:28,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:01:28,240 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:01:28,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-06 20:01:28,596 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 20:01:28,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:01:28,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:01:28,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:01:28,738 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:01:28,738 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:01:28,764 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-06 20:01:28,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493849746] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:28,764 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:01:28,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-06 20:01:28,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781479944] [2021-08-06 20:01:28,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 20:01:28,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:01:28,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 20:01:28,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-06 20:01:28,765 INFO L87 Difference]: Start difference. First operand 2294 states and 7498 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:28,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:01:28,884 INFO L93 Difference]: Finished difference Result 5155 states and 16544 transitions. [2021-08-06 20:01:28,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 20:01:28,884 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 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 39 [2021-08-06 20:01:28,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:01:28,895 INFO L225 Difference]: With dead ends: 5155 [2021-08-06 20:01:28,896 INFO L226 Difference]: Without dead ends: 5155 [2021-08-06 20:01:28,896 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 56.7ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:01:28,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5155 states. [2021-08-06 20:01:28,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5155 to 3749. [2021-08-06 20:01:28,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3749 states, 3748 states have (on average 3.4399679829242262) internal successors, (12893), 3748 states have internal predecessors, (12893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:28,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3749 states to 3749 states and 12893 transitions. [2021-08-06 20:01:29,000 INFO L78 Accepts]: Start accepts. Automaton has 3749 states and 12893 transitions. Word has length 39 [2021-08-06 20:01:29,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:01:29,000 INFO L470 AbstractCegarLoop]: Abstraction has 3749 states and 12893 transitions. [2021-08-06 20:01:29,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:29,000 INFO L276 IsEmpty]: Start isEmpty. Operand 3749 states and 12893 transitions. [2021-08-06 20:01:29,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 20:01:29,010 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:01:29,010 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:01:29,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-06 20:01:29,225 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,SelfDestructingSolverStorable26 [2021-08-06 20:01:29,225 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:01:29,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:01:29,226 INFO L82 PathProgramCache]: Analyzing trace with hash -655129809, now seen corresponding path program 18 times [2021-08-06 20:01:29,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:01:29,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252630888] [2021-08-06 20:01:29,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:01:29,226 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:01:29,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:29,275 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-06 20:01:29,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:01:29,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252630888] [2021-08-06 20:01:29,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252630888] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:29,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909355769] [2021-08-06 20:01:29,276 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:01:29,276 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:29,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:01:29,277 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:01:29,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-06 20:01:29,633 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 20:01:29,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:01:29,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:01:29,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:01:29,757 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:01:29,758 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:01:29,800 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-06 20:01:29,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909355769] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:29,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:01:29,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-06 20:01:29,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298067946] [2021-08-06 20:01:29,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 20:01:29,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:01:29,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 20:01:29,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-06 20:01:29,804 INFO L87 Difference]: Start difference. First operand 3749 states and 12893 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:29,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:01:29,938 INFO L93 Difference]: Finished difference Result 7947 states and 27051 transitions. [2021-08-06 20:01:29,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 20:01:29,964 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 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 41 [2021-08-06 20:01:29,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:01:29,982 INFO L225 Difference]: With dead ends: 7947 [2021-08-06 20:01:29,982 INFO L226 Difference]: Without dead ends: 7669 [2021-08-06 20:01:29,982 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 48.0ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:01:29,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7669 states. [2021-08-06 20:01:30,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7669 to 6556. [2021-08-06 20:01:30,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6556 states, 6555 states have (on average 3.513348588863463) internal successors, (23030), 6555 states have internal predecessors, (23030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:30,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6556 states to 6556 states and 23030 transitions. [2021-08-06 20:01:30,181 INFO L78 Accepts]: Start accepts. Automaton has 6556 states and 23030 transitions. Word has length 41 [2021-08-06 20:01:30,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:01:30,181 INFO L470 AbstractCegarLoop]: Abstraction has 6556 states and 23030 transitions. [2021-08-06 20:01:30,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:30,181 INFO L276 IsEmpty]: Start isEmpty. Operand 6556 states and 23030 transitions. [2021-08-06 20:01:30,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 20:01:30,195 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:01:30,195 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:01:30,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-06 20:01:30,413 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,SelfDestructingSolverStorable27 [2021-08-06 20:01:30,413 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:01:30,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:01:30,414 INFO L82 PathProgramCache]: Analyzing trace with hash -248706197, now seen corresponding path program 19 times [2021-08-06 20:01:30,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:01:30,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105599217] [2021-08-06 20:01:30,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:01:30,415 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:01:30,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:30,475 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:01:30,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:01:30,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105599217] [2021-08-06 20:01:30,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105599217] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:30,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526191652] [2021-08-06 20:01:30,475 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:01:30,475 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:30,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:01:30,477 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:01:30,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-06 20:01:30,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:30,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:01:30,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:01:30,974 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:01:30,975 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:01:31,018 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:01:31,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526191652] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:31,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:01:31,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-06 20:01:31,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782562982] [2021-08-06 20:01:31,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 20:01:31,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:01:31,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 20:01:31,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-06 20:01:31,019 INFO L87 Difference]: Start difference. First operand 6556 states and 23030 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:31,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:01:31,125 INFO L93 Difference]: Finished difference Result 12289 states and 39943 transitions. [2021-08-06 20:01:31,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 20:01:31,126 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 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 41 [2021-08-06 20:01:31,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:01:31,167 INFO L225 Difference]: With dead ends: 12289 [2021-08-06 20:01:31,168 INFO L226 Difference]: Without dead ends: 12289 [2021-08-06 20:01:31,185 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 23.2ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-08-06 20:01:31,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12289 states. [2021-08-06 20:01:31,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12289 to 8118. [2021-08-06 20:01:31,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8118 states, 8117 states have (on average 3.616976715535296) internal successors, (29359), 8117 states have internal predecessors, (29359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:31,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8118 states to 8118 states and 29359 transitions. [2021-08-06 20:01:31,431 INFO L78 Accepts]: Start accepts. Automaton has 8118 states and 29359 transitions. Word has length 41 [2021-08-06 20:01:31,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:01:31,431 INFO L470 AbstractCegarLoop]: Abstraction has 8118 states and 29359 transitions. [2021-08-06 20:01:31,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:31,431 INFO L276 IsEmpty]: Start isEmpty. Operand 8118 states and 29359 transitions. [2021-08-06 20:01:31,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 20:01:31,447 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:01:31,447 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:01:31,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-06 20:01:31,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-06 20:01:31,661 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:01:31,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:01:31,661 INFO L82 PathProgramCache]: Analyzing trace with hash 44674603, now seen corresponding path program 20 times [2021-08-06 20:01:31,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:01:31,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856677137] [2021-08-06 20:01:31,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:01:31,661 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:01:31,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:31,795 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 88.2 percent of original size [2021-08-06 20:01:31,802 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 88.2 percent of original size [2021-08-06 20:01:31,862 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 49, result has 30.0 percent of original size [2021-08-06 20:01:31,864 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 49, result has 30.0 percent of original size [2021-08-06 20:01:31,893 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 78.7 percent of original size [2021-08-06 20:01:31,895 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 78.7 percent of original size [2021-08-06 20:01:31,930 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 20:01:31,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:01:31,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856677137] [2021-08-06 20:01:31,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856677137] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:31,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585179797] [2021-08-06 20:01:31,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:01:31,931 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:31,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:01:31,932 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:01:31,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-06 20:01:32,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:01:32,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:01:32,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 20:01:32,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:01:32,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 16 treesize of output 11 [2021-08-06 20:01:32,701 INFO L354 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2021-08-06 20:01:32,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-08-06 20:01:32,821 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:01:32,821 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 34 treesize of output 32 [2021-08-06 20:01:32,854 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 24.1 percent of original size [2021-08-06 20:01:32,855 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 24.1 percent of original size [2021-08-06 20:01:32,885 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:01:32,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585179797] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:32,885 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:01:32,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-08-06 20:01:32,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816174048] [2021-08-06 20:01:32,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:01:32,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:01:32,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:01:32,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:01:32,886 INFO L87 Difference]: Start difference. First operand 8118 states and 29359 transitions. Second operand has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:33,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:01:33,824 INFO L93 Difference]: Finished difference Result 18037 states and 64202 transitions. [2021-08-06 20:01:33,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 20:01:33,824 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 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 41 [2021-08-06 20:01:33,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:01:33,842 INFO L225 Difference]: With dead ends: 18037 [2021-08-06 20:01:33,842 INFO L226 Difference]: Without dead ends: 7321 [2021-08-06 20:01:33,843 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 399.5ms TimeCoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 20:01:33,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7321 states. [2021-08-06 20:01:33,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7321 to 7321. [2021-08-06 20:01:33,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7321 states, 7320 states have (on average 3.6027322404371587) internal successors, (26372), 7320 states have internal predecessors, (26372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:33,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7321 states to 7321 states and 26372 transitions. [2021-08-06 20:01:33,973 INFO L78 Accepts]: Start accepts. Automaton has 7321 states and 26372 transitions. Word has length 41 [2021-08-06 20:01:33,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:01:33,973 INFO L470 AbstractCegarLoop]: Abstraction has 7321 states and 26372 transitions. [2021-08-06 20:01:33,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:33,973 INFO L276 IsEmpty]: Start isEmpty. Operand 7321 states and 26372 transitions. [2021-08-06 20:01:33,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:01:33,987 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:01:33,987 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:01:34,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-06 20:01:34,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:34,205 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:01:34,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:01:34,205 INFO L82 PathProgramCache]: Analyzing trace with hash -935546031, now seen corresponding path program 21 times [2021-08-06 20:01:34,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:01:34,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023790246] [2021-08-06 20:01:34,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:01:34,205 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:01:34,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:34,250 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-06 20:01:34,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:01:34,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023790246] [2021-08-06 20:01:34,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023790246] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:34,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635700197] [2021-08-06 20:01:34,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:01:34,251 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:34,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:01:34,251 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:01:34,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-06 20:01:34,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 20:01:34,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:01:34,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 20:01:34,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:01:34,954 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-06 20:01:34,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635700197] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:34,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:01:34,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 15 [2021-08-06 20:01:34,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609519204] [2021-08-06 20:01:34,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:01:34,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:01:34,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:01:34,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:01:34,955 INFO L87 Difference]: Start difference. First operand 7321 states and 26372 transitions. Second operand has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 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) [2021-08-06 20:01:36,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:01:36,764 INFO L93 Difference]: Finished difference Result 28357 states and 92278 transitions. [2021-08-06 20:01:36,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-08-06 20:01:36,764 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 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 43 [2021-08-06 20:01:36,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:01:36,837 INFO L225 Difference]: With dead ends: 28357 [2021-08-06 20:01:36,837 INFO L226 Difference]: Without dead ends: 26605 [2021-08-06 20:01:36,840 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4312 ImplicationChecksByTransitivity, 1167.9ms TimeCoverageRelationStatistics Valid=2445, Invalid=8267, Unknown=0, NotChecked=0, Total=10712 [2021-08-06 20:01:36,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26605 states. [2021-08-06 20:01:37,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26605 to 11959. [2021-08-06 20:01:37,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11959 states, 11958 states have (on average 3.6905000836260244) internal successors, (44131), 11958 states have internal predecessors, (44131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:37,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11959 states to 11959 states and 44131 transitions. [2021-08-06 20:01:37,292 INFO L78 Accepts]: Start accepts. Automaton has 11959 states and 44131 transitions. Word has length 43 [2021-08-06 20:01:37,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:01:37,292 INFO L470 AbstractCegarLoop]: Abstraction has 11959 states and 44131 transitions. [2021-08-06 20:01:37,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 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) [2021-08-06 20:01:37,292 INFO L276 IsEmpty]: Start isEmpty. Operand 11959 states and 44131 transitions. [2021-08-06 20:01:37,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:01:37,315 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:01:37,315 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:01:37,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-06 20:01:37,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:37,522 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:01:37,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:01:37,523 INFO L82 PathProgramCache]: Analyzing trace with hash 2131340467, now seen corresponding path program 22 times [2021-08-06 20:01:37,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:01:37,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025485279] [2021-08-06 20:01:37,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:01:37,523 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:01:37,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:37,571 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-08-06 20:01:37,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:01:37,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025485279] [2021-08-06 20:01:37,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025485279] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:37,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35854318] [2021-08-06 20:01:37,571 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:01:37,571 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:37,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:01:37,572 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:01:37,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-06 20:01:38,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:01:38,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:01:38,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:01:38,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:01:38,102 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:01:38,103 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:01:38,175 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-08-06 20:01:38,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35854318] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:38,175 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:01:38,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-06 20:01:38,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829969239] [2021-08-06 20:01:38,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 20:01:38,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:01:38,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 20:01:38,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-08-06 20:01:38,176 INFO L87 Difference]: Start difference. First operand 11959 states and 44131 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:38,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:01:38,335 INFO L93 Difference]: Finished difference Result 17589 states and 58439 transitions. [2021-08-06 20:01:38,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 20:01:38,336 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-06 20:01:38,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:01:38,499 INFO L225 Difference]: With dead ends: 17589 [2021-08-06 20:01:38,499 INFO L226 Difference]: Without dead ends: 17589 [2021-08-06 20:01:38,500 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 44.2ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:01:38,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17589 states. [2021-08-06 20:01:38,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17589 to 12206. [2021-08-06 20:01:38,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12206 states, 12205 states have (on average 3.692994674313806) internal successors, (45073), 12205 states have internal predecessors, (45073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:38,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12206 states to 12206 states and 45073 transitions. [2021-08-06 20:01:38,724 INFO L78 Accepts]: Start accepts. Automaton has 12206 states and 45073 transitions. Word has length 45 [2021-08-06 20:01:38,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:01:38,724 INFO L470 AbstractCegarLoop]: Abstraction has 12206 states and 45073 transitions. [2021-08-06 20:01:38,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:38,724 INFO L276 IsEmpty]: Start isEmpty. Operand 12206 states and 45073 transitions. [2021-08-06 20:01:38,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:01:38,744 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:01:38,744 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:01:38,761 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-08-06 20:01:38,946 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,SelfDestructingSolverStorable31 [2021-08-06 20:01:38,946 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:01:38,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:01:38,946 INFO L82 PathProgramCache]: Analyzing trace with hash 593614575, now seen corresponding path program 23 times [2021-08-06 20:01:38,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:01:38,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143876797] [2021-08-06 20:01:38,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:01:38,946 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:01:38,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:38,991 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-08-06 20:01:38,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:01:38,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143876797] [2021-08-06 20:01:38,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143876797] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:38,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062605053] [2021-08-06 20:01:38,991 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:01:38,991 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:38,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:01:38,992 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:01:38,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-06 20:01:39,447 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 20:01:39,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:01:39,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:01:39,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:01:39,550 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:01:39,550 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:01:39,623 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-08-06 20:01:39,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062605053] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:39,624 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:01:39,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-06 20:01:39,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879607610] [2021-08-06 20:01:39,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 20:01:39,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:01:39,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 20:01:39,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-06 20:01:39,624 INFO L87 Difference]: Start difference. First operand 12206 states and 45073 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:39,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:01:39,949 INFO L93 Difference]: Finished difference Result 18786 states and 62897 transitions. [2021-08-06 20:01:39,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 20:01:39,950 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-06 20:01:39,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:01:39,995 INFO L225 Difference]: With dead ends: 18786 [2021-08-06 20:01:39,995 INFO L226 Difference]: Without dead ends: 18786 [2021-08-06 20:01:39,996 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 67.7ms TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:01:40,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18786 states. [2021-08-06 20:01:40,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18786 to 12849. [2021-08-06 20:01:40,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12849 states, 12848 states have (on average 3.6868773349937736) internal successors, (47369), 12848 states have internal predecessors, (47369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:40,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12849 states to 12849 states and 47369 transitions. [2021-08-06 20:01:40,254 INFO L78 Accepts]: Start accepts. Automaton has 12849 states and 47369 transitions. Word has length 45 [2021-08-06 20:01:40,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:01:40,254 INFO L470 AbstractCegarLoop]: Abstraction has 12849 states and 47369 transitions. [2021-08-06 20:01:40,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:40,254 INFO L276 IsEmpty]: Start isEmpty. Operand 12849 states and 47369 transitions. [2021-08-06 20:01:40,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:01:40,275 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:01:40,276 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:01:40,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-06 20:01:40,484 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,SelfDestructingSolverStorable32 [2021-08-06 20:01:40,485 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:01:40,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:01:40,485 INFO L82 PathProgramCache]: Analyzing trace with hash -688592913, now seen corresponding path program 24 times [2021-08-06 20:01:40,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:01:40,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175608996] [2021-08-06 20:01:40,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:01:40,485 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:01:40,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:40,583 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-08-06 20:01:40,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:01:40,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175608996] [2021-08-06 20:01:40,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175608996] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:40,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333435575] [2021-08-06 20:01:40,584 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:01:40,584 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:40,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:01:40,584 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:01:40,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-06 20:01:41,047 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 20:01:41,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:01:41,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 20:01:41,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:01:41,671 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:01:41,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 67 [2021-08-06 20:01:41,994 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 77.3 percent of original size [2021-08-06 20:01:41,996 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 77.3 percent of original size [2021-08-06 20:01:42,051 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 18.5 percent of original size [2021-08-06 20:01:42,052 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 18.5 percent of original size [2021-08-06 20:01:42,094 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-08-06 20:01:42,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333435575] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:42,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:01:42,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13] total 20 [2021-08-06 20:01:42,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48844962] [2021-08-06 20:01:42,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 20:01:42,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:01:42,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 20:01:42,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:01:42,096 INFO L87 Difference]: Start difference. First operand 12849 states and 47369 transitions. Second operand has 20 states, 20 states have (on average 3.8) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:44,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:01:44,805 INFO L93 Difference]: Finished difference Result 26405 states and 90809 transitions. [2021-08-06 20:01:44,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-06 20:01:44,806 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.8) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-06 20:01:44,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:01:44,880 INFO L225 Difference]: With dead ends: 26405 [2021-08-06 20:01:44,880 INFO L226 Difference]: Without dead ends: 26299 [2021-08-06 20:01:44,881 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1230 ImplicationChecksByTransitivity, 1496.4ms TimeCoverageRelationStatistics Valid=710, Invalid=3982, Unknown=0, NotChecked=0, Total=4692 [2021-08-06 20:01:44,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26299 states. [2021-08-06 20:01:45,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26299 to 15441. [2021-08-06 20:01:45,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15441 states, 15440 states have (on average 3.7156735751295336) internal successors, (57370), 15440 states have internal predecessors, (57370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:45,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15441 states to 15441 states and 57370 transitions. [2021-08-06 20:01:45,317 INFO L78 Accepts]: Start accepts. Automaton has 15441 states and 57370 transitions. Word has length 45 [2021-08-06 20:01:45,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:01:45,318 INFO L470 AbstractCegarLoop]: Abstraction has 15441 states and 57370 transitions. [2021-08-06 20:01:45,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.8) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:45,318 INFO L276 IsEmpty]: Start isEmpty. Operand 15441 states and 57370 transitions. [2021-08-06 20:01:45,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:01:45,346 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:01:45,346 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:01:45,363 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-08-06 20:01:45,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:45,563 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:01:45,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:01:45,564 INFO L82 PathProgramCache]: Analyzing trace with hash 264334017, now seen corresponding path program 25 times [2021-08-06 20:01:45,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:01:45,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185081358] [2021-08-06 20:01:45,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:01:45,564 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:01:45,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:45,636 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-08-06 20:01:45,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:01:45,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185081358] [2021-08-06 20:01:45,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185081358] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:45,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869630917] [2021-08-06 20:01:45,636 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:01:45,636 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:45,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:01:45,637 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:01:45,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-06 20:01:46,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:46,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:01:46,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:01:46,348 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:01:46,349 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:01:46,377 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-08-06 20:01:46,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869630917] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:46,377 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:01:46,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-06 20:01:46,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757261268] [2021-08-06 20:01:46,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:01:46,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:01:46,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:01:46,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:01:46,378 INFO L87 Difference]: Start difference. First operand 15441 states and 57370 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:46,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:01:46,666 INFO L93 Difference]: Finished difference Result 22386 states and 79199 transitions. [2021-08-06 20:01:46,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 20:01:46,667 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-06 20:01:46,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:01:46,733 INFO L225 Difference]: With dead ends: 22386 [2021-08-06 20:01:46,733 INFO L226 Difference]: Without dead ends: 22386 [2021-08-06 20:01:46,733 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 120.1ms TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:01:46,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22386 states. [2021-08-06 20:01:47,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22386 to 11063. [2021-08-06 20:01:47,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11063 states, 11062 states have (on average 3.6169770385102153) internal successors, (40011), 11062 states have internal predecessors, (40011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:47,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11063 states to 11063 states and 40011 transitions. [2021-08-06 20:01:47,143 INFO L78 Accepts]: Start accepts. Automaton has 11063 states and 40011 transitions. Word has length 45 [2021-08-06 20:01:47,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:01:47,143 INFO L470 AbstractCegarLoop]: Abstraction has 11063 states and 40011 transitions. [2021-08-06 20:01:47,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:47,148 INFO L276 IsEmpty]: Start isEmpty. Operand 11063 states and 40011 transitions. [2021-08-06 20:01:47,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:01:47,197 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:01:47,197 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:01:47,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-06 20:01:47,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:47,426 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:01:47,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:01:47,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1757841651, now seen corresponding path program 26 times [2021-08-06 20:01:47,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:01:47,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612104735] [2021-08-06 20:01:47,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:01:47,426 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:01:47,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:47,495 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-08-06 20:01:47,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:01:47,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612104735] [2021-08-06 20:01:47,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612104735] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:47,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262825186] [2021-08-06 20:01:47,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:01:47,496 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:47,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:01:47,499 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:01:47,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-06 20:01:48,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:01:48,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:01:48,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:01:48,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:01:48,128 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:01:48,128 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:01:48,199 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-08-06 20:01:48,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262825186] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:48,199 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:01:48,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-06 20:01:48,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490689661] [2021-08-06 20:01:48,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 20:01:48,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:01:48,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 20:01:48,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-06 20:01:48,201 INFO L87 Difference]: Start difference. First operand 11063 states and 40011 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:48,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:01:48,376 INFO L93 Difference]: Finished difference Result 16730 states and 55146 transitions. [2021-08-06 20:01:48,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 20:01:48,377 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-06 20:01:48,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:01:48,417 INFO L225 Difference]: With dead ends: 16730 [2021-08-06 20:01:48,417 INFO L226 Difference]: Without dead ends: 16724 [2021-08-06 20:01:48,417 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 52.6ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:01:48,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16724 states. [2021-08-06 20:01:48,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16724 to 12086. [2021-08-06 20:01:48,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12086 states, 12085 states have (on average 3.6571783202316923) internal successors, (44197), 12085 states have internal predecessors, (44197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:48,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12086 states to 12086 states and 44197 transitions. [2021-08-06 20:01:48,695 INFO L78 Accepts]: Start accepts. Automaton has 12086 states and 44197 transitions. Word has length 45 [2021-08-06 20:01:48,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:01:48,695 INFO L470 AbstractCegarLoop]: Abstraction has 12086 states and 44197 transitions. [2021-08-06 20:01:48,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:48,695 INFO L276 IsEmpty]: Start isEmpty. Operand 12086 states and 44197 transitions. [2021-08-06 20:01:48,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:01:48,716 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:01:48,716 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:01:48,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-06 20:01:48,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:48,934 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:01:48,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:01:48,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1814886643, now seen corresponding path program 27 times [2021-08-06 20:01:48,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:01:48,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854706343] [2021-08-06 20:01:48,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:01:48,934 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:01:48,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:49,011 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-08-06 20:01:49,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:01:49,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854706343] [2021-08-06 20:01:49,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854706343] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:49,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139051122] [2021-08-06 20:01:49,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:01:49,011 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:49,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:01:49,025 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:01:49,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-06 20:01:49,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 20:01:49,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:01:49,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 20:01:49,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:01:49,787 INFO L354 Elim1Store]: treesize reduction 12, result has 60.0 percent of original size [2021-08-06 20:01:49,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 43 [2021-08-06 20:01:49,947 INFO L354 Elim1Store]: treesize reduction 12, result has 60.0 percent of original size [2021-08-06 20:01:49,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 58 [2021-08-06 20:01:50,329 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:01:50,329 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 47 treesize of output 47 [2021-08-06 20:01:50,399 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 79.2 percent of original size [2021-08-06 20:01:50,400 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 79.2 percent of original size [2021-08-06 20:01:50,451 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 24.1 percent of original size [2021-08-06 20:01:50,452 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 24.1 percent of original size [2021-08-06 20:01:50,492 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-06 20:01:50,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139051122] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:50,492 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:01:50,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13] total 18 [2021-08-06 20:01:50,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149564235] [2021-08-06 20:01:50,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:01:50,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:01:50,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:01:50,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:01:50,494 INFO L87 Difference]: Start difference. First operand 12086 states and 44197 transitions. Second operand has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 18 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:55,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:01:55,765 INFO L93 Difference]: Finished difference Result 27113 states and 87060 transitions. [2021-08-06 20:01:55,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2021-08-06 20:01:55,765 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 18 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 45 [2021-08-06 20:01:55,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:01:55,841 INFO L225 Difference]: With dead ends: 27113 [2021-08-06 20:01:55,841 INFO L226 Difference]: Without dead ends: 27002 [2021-08-06 20:01:55,844 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6279 ImplicationChecksByTransitivity, 3851.1ms TimeCoverageRelationStatistics Valid=2253, Invalid=15039, Unknown=0, NotChecked=0, Total=17292 [2021-08-06 20:01:55,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27002 states. [2021-08-06 20:01:56,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27002 to 10323. [2021-08-06 20:01:56,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10323 states, 10322 states have (on average 3.534005037783375) internal successors, (36478), 10322 states have internal predecessors, (36478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:56,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10323 states to 10323 states and 36478 transitions. [2021-08-06 20:01:56,246 INFO L78 Accepts]: Start accepts. Automaton has 10323 states and 36478 transitions. Word has length 45 [2021-08-06 20:01:56,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:01:56,246 INFO L470 AbstractCegarLoop]: Abstraction has 10323 states and 36478 transitions. [2021-08-06 20:01:56,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 18 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:56,246 INFO L276 IsEmpty]: Start isEmpty. Operand 10323 states and 36478 transitions. [2021-08-06 20:01:56,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:01:56,264 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:01:56,264 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:01:56,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-06 20:01:56,484 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,SelfDestructingSolverStorable36 [2021-08-06 20:01:56,485 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:01:56,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:01:56,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1684435661, now seen corresponding path program 28 times [2021-08-06 20:01:56,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:01:56,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124666937] [2021-08-06 20:01:56,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:01:56,485 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:01:56,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:56,586 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-08-06 20:01:56,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:01:56,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124666937] [2021-08-06 20:01:56,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124666937] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:56,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378311689] [2021-08-06 20:01:56,587 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:01:56,587 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:56,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:01:56,601 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:01:56,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-06 20:01:57,305 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:01:57,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:01:57,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:01:57,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:01:57,398 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:01:57,399 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:01:57,472 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-08-06 20:01:57,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378311689] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:57,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:01:57,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 20:01:57,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073544623] [2021-08-06 20:01:57,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 20:01:57,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:01:57,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 20:01:57,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-06 20:01:57,473 INFO L87 Difference]: Start difference. First operand 10323 states and 36478 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:57,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:01:57,651 INFO L93 Difference]: Finished difference Result 14269 states and 45826 transitions. [2021-08-06 20:01:57,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 20:01:57,652 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-06 20:01:57,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:01:57,684 INFO L225 Difference]: With dead ends: 14269 [2021-08-06 20:01:57,684 INFO L226 Difference]: Without dead ends: 14259 [2021-08-06 20:01:57,684 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 77.6ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:01:57,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14259 states. [2021-08-06 20:01:57,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14259 to 10511. [2021-08-06 20:01:57,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10511 states, 10510 states have (on average 3.532730732635585) internal successors, (37129), 10510 states have internal predecessors, (37129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:57,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10511 states to 10511 states and 37129 transitions. [2021-08-06 20:01:57,933 INFO L78 Accepts]: Start accepts. Automaton has 10511 states and 37129 transitions. Word has length 45 [2021-08-06 20:01:57,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:01:57,933 INFO L470 AbstractCegarLoop]: Abstraction has 10511 states and 37129 transitions. [2021-08-06 20:01:57,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:57,934 INFO L276 IsEmpty]: Start isEmpty. Operand 10511 states and 37129 transitions. [2021-08-06 20:01:57,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:01:57,952 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:01:57,952 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:01:57,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-06 20:01:58,170 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,SelfDestructingSolverStorable37 [2021-08-06 20:01:58,170 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:01:58,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:01:58,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1810067119, now seen corresponding path program 29 times [2021-08-06 20:01:58,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:01:58,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949526413] [2021-08-06 20:01:58,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:01:58,171 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:01:58,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:58,225 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 20:01:58,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:01:58,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949526413] [2021-08-06 20:01:58,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949526413] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:58,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246147834] [2021-08-06 20:01:58,225 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:01:58,225 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:58,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:01:58,226 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:01:58,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-06 20:01:58,812 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 20:01:58,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:01:58,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:01:58,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:01:59,012 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-08-06 20:01:59,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246147834] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:59,012 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:01:59,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 14 [2021-08-06 20:01:59,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560429646] [2021-08-06 20:01:59,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:01:59,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:01:59,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:01:59,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:01:59,013 INFO L87 Difference]: Start difference. First operand 10511 states and 37129 transitions. Second operand has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 14 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) [2021-08-06 20:02:00,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:02:00,613 INFO L93 Difference]: Finished difference Result 29283 states and 95693 transitions. [2021-08-06 20:02:00,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-08-06 20:02:00,613 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 14 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 45 [2021-08-06 20:02:00,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:02:00,711 INFO L225 Difference]: With dead ends: 29283 [2021-08-06 20:02:00,712 INFO L226 Difference]: Without dead ends: 28551 [2021-08-06 20:02:00,713 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2779 ImplicationChecksByTransitivity, 801.5ms TimeCoverageRelationStatistics Valid=1521, Invalid=6135, Unknown=0, NotChecked=0, Total=7656 [2021-08-06 20:02:00,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28551 states. [2021-08-06 20:02:01,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28551 to 19329. [2021-08-06 20:02:01,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19329 states, 19328 states have (on average 3.5857822847682117) internal successors, (69306), 19328 states have internal predecessors, (69306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:02:01,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19329 states to 19329 states and 69306 transitions. [2021-08-06 20:02:01,524 INFO L78 Accepts]: Start accepts. Automaton has 19329 states and 69306 transitions. Word has length 45 [2021-08-06 20:02:01,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:02:01,524 INFO L470 AbstractCegarLoop]: Abstraction has 19329 states and 69306 transitions. [2021-08-06 20:02:01,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 14 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) [2021-08-06 20:02:01,524 INFO L276 IsEmpty]: Start isEmpty. Operand 19329 states and 69306 transitions. [2021-08-06 20:02:01,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 20:02:01,567 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:02:01,568 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:02:01,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-06 20:02:01,781 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,SelfDestructingSolverStorable38 [2021-08-06 20:02:01,782 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:02:01,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:02:01,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1892884331, now seen corresponding path program 30 times [2021-08-06 20:02:01,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:02:01,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602852013] [2021-08-06 20:02:01,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:02:01,782 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:02:01,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:02:02,107 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 70.4 percent of original size [2021-08-06 20:02:02,108 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 70.4 percent of original size [2021-08-06 20:02:02,121 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 60.0 percent of original size [2021-08-06 20:02:02,123 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 60.0 percent of original size [2021-08-06 20:02:02,142 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 23, result has 36.1 percent of original size [2021-08-06 20:02:02,143 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 23, result has 36.1 percent of original size [2021-08-06 20:02:02,155 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 147, result has 8.1 percent of original size [2021-08-06 20:02:02,159 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 147, result has 8.1 percent of original size [2021-08-06 20:02:02,165 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 368, result has 3.4 percent of original size [2021-08-06 20:02:02,167 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 368, result has 3.4 percent of original size [2021-08-06 20:02:02,172 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 651, result has 2.0 percent of original size [2021-08-06 20:02:02,174 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 651, result has 2.0 percent of original size [2021-08-06 20:02:02,184 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4794, result has 0.2 percent of original size [2021-08-06 20:02:02,187 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4794, result has 0.2 percent of original size [2021-08-06 20:02:02,201 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4648, result has 1.8 percent of original size [2021-08-06 20:02:02,213 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4648, result has 1.8 percent of original size [2021-08-06 20:02:02,238 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 981, result has 2.3 percent of original size [2021-08-06 20:02:02,246 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 981, result has 2.3 percent of original size [2021-08-06 20:02:02,258 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 206, result has 2.4 percent of original size [2021-08-06 20:02:02,259 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 206, result has 2.4 percent of original size [2021-08-06 20:02:02,267 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 55.6 percent of original size [2021-08-06 20:02:02,267 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 55.6 percent of original size [2021-08-06 20:02:02,269 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 55.6 percent of original size [2021-08-06 20:02:02,269 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 55.6 percent of original size [2021-08-06 20:02:02,279 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-08-06 20:02:02,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:02:02,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602852013] [2021-08-06 20:02:02,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602852013] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:02:02,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227179234] [2021-08-06 20:02:02,280 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:02:02,280 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:02:02,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:02:02,280 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:02:02,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-06 20:02:02,883 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-06 20:02:02,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:02:02,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 20:02:02,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:02:05,225 INFO L354 Elim1Store]: treesize reduction 60, result has 46.4 percent of original size [2021-08-06 20:02:05,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 97 treesize of output 115 [2021-08-06 20:02:30,497 INFO L354 Elim1Store]: treesize reduction 32, result has 60.5 percent of original size [2021-08-06 20:02:30,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 315 treesize of output 253 [2021-08-06 20:02:31,614 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 18.5 percent of original size [2021-08-06 20:02:31,615 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 18.5 percent of original size [2021-08-06 20:02:31,644 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 20:02:31,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227179234] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:02:31,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:02:31,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 26 [2021-08-06 20:02:31,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711388603] [2021-08-06 20:02:31,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 20:02:31,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:02:31,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 20:02:31,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2021-08-06 20:02:31,645 INFO L87 Difference]: Start difference. First operand 19329 states and 69306 transitions. Second operand has 27 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 26 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) [2021-08-06 20:02:39,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:02:39,589 INFO L93 Difference]: Finished difference Result 41171 states and 142373 transitions. [2021-08-06 20:02:39,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-08-06 20:02:39,589 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 26 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 47 [2021-08-06 20:02:39,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:02:39,652 INFO L225 Difference]: With dead ends: 41171 [2021-08-06 20:02:39,652 INFO L226 Difference]: Without dead ends: 21597 [2021-08-06 20:02:39,655 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3636 ImplicationChecksByTransitivity, 4000.1ms TimeCoverageRelationStatistics Valid=1349, Invalid=9993, Unknown=0, NotChecked=0, Total=11342 [2021-08-06 20:02:39,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21597 states. [2021-08-06 20:02:39,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21597 to 19172. [2021-08-06 20:02:39,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19172 states, 19171 states have (on average 3.589953575713317) internal successors, (68823), 19171 states have internal predecessors, (68823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:02:40,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19172 states to 19172 states and 68823 transitions. [2021-08-06 20:02:40,050 INFO L78 Accepts]: Start accepts. Automaton has 19172 states and 68823 transitions. Word has length 47 [2021-08-06 20:02:40,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:02:40,050 INFO L470 AbstractCegarLoop]: Abstraction has 19172 states and 68823 transitions. [2021-08-06 20:02:40,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 26 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) [2021-08-06 20:02:40,050 INFO L276 IsEmpty]: Start isEmpty. Operand 19172 states and 68823 transitions. [2021-08-06 20:02:40,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 20:02:40,086 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:02:40,086 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:02:40,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-06 20:02:40,304 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,SelfDestructingSolverStorable39 [2021-08-06 20:02:40,304 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:02:40,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:02:40,305 INFO L82 PathProgramCache]: Analyzing trace with hash -45533995, now seen corresponding path program 31 times [2021-08-06 20:02:40,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:02:40,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918377140] [2021-08-06 20:02:40,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:02:40,305 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:02:40,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:02:40,573 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 60.0 percent of original size [2021-08-06 20:02:40,589 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 60.0 percent of original size [2021-08-06 20:02:40,603 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 32, result has 63.2 percent of original size [2021-08-06 20:02:40,606 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 32, result has 63.2 percent of original size [2021-08-06 20:02:40,642 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 50.0 percent of original size [2021-08-06 20:02:40,643 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 50.0 percent of original size [2021-08-06 20:02:40,672 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3589, result has 0.3 percent of original size [2021-08-06 20:02:40,683 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3589, result has 0.3 percent of original size [2021-08-06 20:02:40,703 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 62862, result has 0.0 percent of original size [2021-08-06 20:02:40,710 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 62862, result has 0.0 percent of original size [2021-08-06 20:02:40,731 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 62861, result has 0.0 percent of original size [2021-08-06 20:02:40,738 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 62861, result has 0.0 percent of original size [2021-08-06 20:02:40,764 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 113745, result has 0.0 percent of original size [2021-08-06 20:02:40,792 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 113745, result has 0.0 percent of original size [2021-08-06 20:02:40,809 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 228098, result has 0.0 percent of original size [2021-08-06 20:02:40,813 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 228098, result has 0.0 percent of original size [2021-08-06 20:02:40,863 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 212233, result has 0.0 percent of original size [2021-08-06 20:02:40,933 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 212233, result has 0.0 percent of original size [2021-08-06 20:02:40,979 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 55.6 percent of original size [2021-08-06 20:02:40,980 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 55.6 percent of original size [2021-08-06 20:02:41,013 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-06 20:02:41,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:02:41,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918377140] [2021-08-06 20:02:41,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918377140] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:02:41,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345782650] [2021-08-06 20:02:41,013 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:02:41,013 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:02:41,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:02:41,014 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:02:41,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-06 20:02:41,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:02:41,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 20:02:41,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:02:41,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 10 treesize of output 7 [2021-08-06 20:02:42,304 INFO L354 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2021-08-06 20:02:42,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 24 [2021-08-06 20:02:42,354 INFO L354 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2021-08-06 20:02:42,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 19 [2021-08-06 20:02:42,585 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:02:42,585 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 32 treesize of output 30 [2021-08-06 20:02:42,615 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 18.5 percent of original size [2021-08-06 20:02:42,616 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 18.5 percent of original size [2021-08-06 20:02:42,645 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 20:02:42,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345782650] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:02:42,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:02:42,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 22 [2021-08-06 20:02:42,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275533780] [2021-08-06 20:02:42,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:02:42,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:02:42,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:02:42,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:02:42,646 INFO L87 Difference]: Start difference. First operand 19172 states and 68823 transitions. Second operand has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 22 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:02:43,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:02:43,840 INFO L93 Difference]: Finished difference Result 43034 states and 150624 transitions. [2021-08-06 20:02:43,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 20:02:43,840 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 22 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 20:02:43,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:02:43,891 INFO L225 Difference]: With dead ends: 43034 [2021-08-06 20:02:43,891 INFO L226 Difference]: Without dead ends: 19106 [2021-08-06 20:02:43,891 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 535.9ms TimeCoverageRelationStatistics Valid=244, Invalid=1316, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 20:02:43,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19106 states. [2021-08-06 20:02:44,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19106 to 19106. [2021-08-06 20:02:44,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19106 states, 19105 states have (on average 3.596283695367705) internal successors, (68707), 19105 states have internal predecessors, (68707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:02:44,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19106 states to 19106 states and 68707 transitions. [2021-08-06 20:02:44,243 INFO L78 Accepts]: Start accepts. Automaton has 19106 states and 68707 transitions. Word has length 47 [2021-08-06 20:02:44,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:02:44,243 INFO L470 AbstractCegarLoop]: Abstraction has 19106 states and 68707 transitions. [2021-08-06 20:02:44,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 22 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:02:44,243 INFO L276 IsEmpty]: Start isEmpty. Operand 19106 states and 68707 transitions. [2021-08-06 20:02:44,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 20:02:44,279 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:02:44,279 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:02:44,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-06 20:02:44,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:02:44,493 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:02:44,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:02:44,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1436645653, now seen corresponding path program 32 times [2021-08-06 20:02:44,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:02:44,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543647633] [2021-08-06 20:02:44,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:02:44,493 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:02:44,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:02:44,692 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 91.2 percent of original size [2021-08-06 20:02:44,695 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 91.2 percent of original size [2021-08-06 20:02:44,730 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 87, result has 17.9 percent of original size [2021-08-06 20:02:44,731 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 87, result has 17.9 percent of original size [2021-08-06 20:02:44,737 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 200, result has 8.7 percent of original size [2021-08-06 20:02:44,739 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 200, result has 8.7 percent of original size [2021-08-06 20:02:44,744 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 481, result has 3.8 percent of original size [2021-08-06 20:02:44,745 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 481, result has 3.8 percent of original size [2021-08-06 20:02:44,750 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 481, result has 3.8 percent of original size [2021-08-06 20:02:44,752 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 481, result has 3.8 percent of original size [2021-08-06 20:02:44,765 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 401, result has 3.8 percent of original size [2021-08-06 20:02:44,766 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 401, result has 3.8 percent of original size [2021-08-06 20:02:44,777 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 515, result has 1.7 percent of original size [2021-08-06 20:02:44,778 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 515, result has 1.7 percent of original size [2021-08-06 20:02:44,790 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 504, result has 8.9 percent of original size [2021-08-06 20:02:44,795 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 504, result has 8.9 percent of original size [2021-08-06 20:02:44,837 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-08-06 20:02:44,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:02:44,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543647633] [2021-08-06 20:02:44,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543647633] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:02:44,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803981189] [2021-08-06 20:02:44,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:02:44,837 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:02:44,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:02:44,838 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:02:44,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-06 20:02:45,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:02:45,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:02:45,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 20:02:45,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:02:45,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 10 treesize of output 7 [2021-08-06 20:02:46,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-08-06 20:02:46,409 INFO L354 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2021-08-06 20:02:46,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 52 treesize of output 47 [2021-08-06 20:02:46,496 INFO L354 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2021-08-06 20:02:46,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 42 [2021-08-06 20:02:47,103 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:02:47,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 82 treesize of output 68 [2021-08-06 20:02:47,157 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 18.5 percent of original size [2021-08-06 20:02:47,158 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 18.5 percent of original size [2021-08-06 20:02:47,187 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 20:02:47,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803981189] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:02:47,187 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:02:47,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 21 [2021-08-06 20:02:47,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861847047] [2021-08-06 20:02:47,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:02:47,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:02:47,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:02:47,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:02:47,188 INFO L87 Difference]: Start difference. First operand 19106 states and 68707 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 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) [2021-08-06 20:02:47,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:02:47,911 INFO L93 Difference]: Finished difference Result 24697 states and 87108 transitions. [2021-08-06 20:02:47,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 20:02:47,911 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 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 47 [2021-08-06 20:02:47,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:02:47,911 INFO L225 Difference]: With dead ends: 24697 [2021-08-06 20:02:47,912 INFO L226 Difference]: Without dead ends: 0 [2021-08-06 20:02:47,912 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 432.5ms TimeCoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2021-08-06 20:02:47,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-06 20:02:47,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-06 20:02:47,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:02:47,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-06 20:02:47,912 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 47 [2021-08-06 20:02:47,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:02:47,912 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-06 20:02:47,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 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) [2021-08-06 20:02:47,912 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-06 20:02:47,912 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-06 20:02:47,915 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-06 20:02:47,916 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-06 20:02:47,916 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-06 20:02:47,916 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-06 20:02:47,916 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3INUSE_VIOLATION [2021-08-06 20:02:47,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-06 20:02:48,136 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,SelfDestructingSolverStorable41 [2021-08-06 20:02:48,139 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-06 20:02:48,139 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-06 20:02:48,140 INFO L202 PluginConnector]: Adding new model min-max-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.08 08:02:48 BasicIcfg [2021-08-06 20:02:48,140 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-06 20:02:48,141 INFO L168 Benchmark]: Toolchain (without parser) took 100322.59 ms. Allocated memory was 175.1 MB in the beginning and 2.2 GB in the end (delta: 2.1 GB). Free memory was 155.2 MB in the beginning and 1.7 GB in the end (delta: -1.5 GB). Peak memory consumption was 551.8 MB. Max. memory is 8.0 GB. [2021-08-06 20:02:48,141 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.40 ms. Allocated memory is still 175.1 MB. Free memory was 156.5 MB in the beginning and 156.4 MB in the end (delta: 63.8 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 20:02:48,141 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.09 ms. Allocated memory is still 175.1 MB. Free memory was 155.2 MB in the beginning and 153.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 20:02:48,141 INFO L168 Benchmark]: Boogie Preprocessor took 22.82 ms. Allocated memory is still 175.1 MB. Free memory was 153.6 MB in the beginning and 152.6 MB in the end (delta: 988.9 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 20:02:48,141 INFO L168 Benchmark]: RCFGBuilder took 282.89 ms. Allocated memory is still 175.1 MB. Free memory was 152.5 MB in the beginning and 138.1 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-08-06 20:02:48,141 INFO L168 Benchmark]: TraceAbstraction took 99991.35 ms. Allocated memory was 175.1 MB in the beginning and 2.2 GB in the end (delta: 2.1 GB). Free memory was 137.7 MB in the beginning and 1.7 GB in the end (delta: -1.5 GB). Peak memory consumption was 535.0 MB. Max. memory is 8.0 GB. [2021-08-06 20:02:48,141 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 0.40 ms. Allocated memory is still 175.1 MB. Free memory was 156.5 MB in the beginning and 156.4 MB in the end (delta: 63.8 kB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 21.09 ms. Allocated memory is still 175.1 MB. Free memory was 155.2 MB in the beginning and 153.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 22.82 ms. Allocated memory is still 175.1 MB. Free memory was 153.6 MB in the beginning and 152.6 MB in the end (delta: 988.9 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 282.89 ms. Allocated memory is still 175.1 MB. Free memory was 152.5 MB in the beginning and 138.1 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 99991.35 ms. Allocated memory was 175.1 MB in the beginning and 2.2 GB in the end (delta: 2.1 GB). Free memory was 137.7 MB in the beginning and 1.7 GB in the end (delta: -1.5 GB). Peak memory consumption was 535.0 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: 2645, positive: 2242, positive conditional: 2242, positive unconditional: 0, negative: 403, negative conditional: 403, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 2458, positive: 2242, positive conditional: 0, positive unconditional: 2242, negative: 216, negative conditional: 0, negative unconditional: 216, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 194, positive: 180, positive conditional: 0, positive unconditional: 180, negative: 14, negative conditional: 0, negative unconditional: 14, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 194, positive: 180, positive conditional: 0, positive unconditional: 180, negative: 14, negative conditional: 0, negative unconditional: 14, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 14, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 14, negative conditional: 0, negative unconditional: 14, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 57, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 57, negative conditional: 0, negative unconditional: 57, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 2458, positive: 2062, positive conditional: 0, positive unconditional: 2062, negative: 202, negative conditional: 0, negative unconditional: 202, unknown: 194, unknown conditional: 0, unknown unconditional: 194] , Statistics on independence cache: Total cache size (in pairs): 194, Positive cache size: 180, Positive conditional cache size: 0, Positive unconditional cache size: 180, Negative cache size: 14, Negative conditional cache size: 0, Negative unconditional cache size: 14, Independence queries for same thread: 187 - 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 - PositiveResult [Line: 77]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 9 procedures, 56 locations, 5 error locations. Started 1 CEGAR loops. OverallTime: 99875.0ms, OverallIterations: 42, TraceHistogramMax: 4, EmptinessCheckTime: 451.5ms, AutomataDifference: 29071.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 266.4ms, PartialOrderReductionTime: 254.3ms, HoareTripleCheckerStatistics: 2184 SDtfs, 8454 SDslu, 12218 SDs, 0 SdLazy, 16104 SolverSat, 1411 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 10199.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2364 GetRequests, 1328 SyntacticMatches, 33 SemanticMatches, 1003 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20870 ImplicationChecksByTransitivity, 15651.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=19329occurred in iteration=39, InterpolantAutomatonStates: 945, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 5753.7ms AutomataMinimizationTime, 42 MinimizatonAttempts, 105238 StatesRemovedByMinimization, 37 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 213.0ms SsaConstructionTime, 831.6ms SatisfiabilityAnalysisTime, 43799.2ms InterpolantComputationTime, 2797 NumberOfCodeBlocks, 2778 NumberOfCodeBlocksAsserted, 138 NumberOfCheckSat, 2720 ConstructedInterpolants, 44 QuantifiedInterpolants, 16692 SizeOfPredicates, 73 NumberOfNonLiveVariables, 3552 ConjunctsInSsa, 412 ConjunctsInUnsatCore, 77 InterpolantComputations, 7 PerfectInterpolantSequences, 826/1557 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-08-06 20:02:48,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...