/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-30 20:15:52,536 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-30 20:15:52,538 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-30 20:15:52,591 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-30 20:15:52,636 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-01-30 20:15:52,663 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-30 20:15:52,663 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-30 20:15:52,663 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-30 20:15:52,663 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-30 20:15:52,664 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-30 20:15:52,664 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-30 20:15:52,664 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-30 20:15:52,664 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-30 20:15:52,665 INFO L138 SettingsManager]: * Use SBE=true [2022-01-30 20:15:52,665 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-30 20:15:52,665 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-30 20:15:52,665 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-30 20:15:52,666 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-30 20:15:52,666 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-30 20:15:52,666 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-30 20:15:52,666 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-30 20:15:52,666 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-30 20:15:52,666 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-30 20:15:52,666 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-30 20:15:52,666 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-30 20:15:52,666 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-30 20:15:52,666 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-30 20:15:52,666 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-30 20:15:52,666 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-30 20:15:52,667 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-30 20:15:52,667 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-30 20:15:52,667 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-30 20:15:52,667 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-30 20:15:52,667 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-30 20:15:52,667 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-30 20:15:52,667 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-30 20:15:52,667 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-30 20:15:52,667 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-30 20:15:52,667 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-30 20:15:52,833 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-30 20:15:52,847 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-30 20:15:52,848 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-30 20:15:52,849 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-30 20:15:52,850 INFO L275 PluginConnector]: CDTParser initialized [2022-01-30 20:15:52,850 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-1.i [2022-01-30 20:15:52,888 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a874e929/68b29dbf14a14e959f83e679865ec5c8/FLAGbc0fd78c2 [2022-01-30 20:15:53,230 INFO L306 CDTParser]: Found 1 translation units. [2022-01-30 20:15:53,231 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-1.i [2022-01-30 20:15:53,240 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a874e929/68b29dbf14a14e959f83e679865ec5c8/FLAGbc0fd78c2 [2022-01-30 20:15:53,644 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a874e929/68b29dbf14a14e959f83e679865ec5c8 [2022-01-30 20:15:53,646 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-30 20:15:53,647 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-30 20:15:53,650 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-30 20:15:53,650 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-30 20:15:53,652 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-30 20:15:53,653 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 08:15:53" (1/1) ... [2022-01-30 20:15:53,654 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72bde767 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 08:15:53, skipping insertion in model container [2022-01-30 20:15:53,654 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 08:15:53" (1/1) ... [2022-01-30 20:15:53,658 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-30 20:15:53,669 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-30 20:15:53,780 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-1.i[823,836] [2022-01-30 20:15:53,812 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-30 20:15:53,827 INFO L203 MainTranslator]: Completed pre-run [2022-01-30 20:15:53,835 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-1.i[823,836] [2022-01-30 20:15:53,850 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-30 20:15:53,859 INFO L208 MainTranslator]: Completed translation [2022-01-30 20:15:53,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 08:15:53 WrapperNode [2022-01-30 20:15:53,860 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-30 20:15:53,860 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-30 20:15:53,860 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-30 20:15:53,861 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-30 20:15:53,868 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 08:15:53" (1/1) ... [2022-01-30 20:15:53,868 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 08:15:53" (1/1) ... [2022-01-30 20:15:53,873 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 08:15:53" (1/1) ... [2022-01-30 20:15:53,873 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 08:15:53" (1/1) ... [2022-01-30 20:15:53,879 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 08:15:53" (1/1) ... [2022-01-30 20:15:53,882 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 08:15:53" (1/1) ... [2022-01-30 20:15:53,884 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 08:15:53" (1/1) ... [2022-01-30 20:15:53,885 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-30 20:15:53,886 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-30 20:15:53,886 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-30 20:15:53,886 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-30 20:15:53,887 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 08:15:53" (1/1) ... [2022-01-30 20:15:53,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-30 20:15:53,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 20:15:53,935 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) [2022-01-30 20:15:53,949 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 [2022-01-30 20:15:53,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-30 20:15:53,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-30 20:15:53,980 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-30 20:15:53,980 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-30 20:15:53,981 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-30 20:15:53,981 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-30 20:15:53,981 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-30 20:15:53,981 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-30 20:15:53,981 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-30 20:15:53,982 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-30 20:15:53,982 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-30 20:15:53,982 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-30 20:15:53,982 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-30 20:15:53,982 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-30 20:15:53,982 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-30 20:15:53,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-30 20:15:53,982 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-30 20:15:53,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-30 20:15:53,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-30 20:15:53,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-30 20:15:53,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-30 20:15:54,029 INFO L234 CfgBuilder]: Building ICFG [2022-01-30 20:15:54,031 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-30 20:15:54,215 INFO L275 CfgBuilder]: Performing block encoding [2022-01-30 20:15:54,221 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-30 20:15:54,221 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2022-01-30 20:15:54,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 08:15:54 BoogieIcfgContainer [2022-01-30 20:15:54,223 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-30 20:15:54,224 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-30 20:15:54,224 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-30 20:15:54,230 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-30 20:15:54,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.01 08:15:53" (1/3) ... [2022-01-30 20:15:54,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ba6911 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 08:15:54, skipping insertion in model container [2022-01-30 20:15:54,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 08:15:53" (2/3) ... [2022-01-30 20:15:54,231 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ba6911 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 08:15:54, skipping insertion in model container [2022-01-30 20:15:54,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 08:15:54" (3/3) ... [2022-01-30 20:15:54,233 INFO L111 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_ground-1.i [2022-01-30 20:15:54,236 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-30 20:15:54,236 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-30 20:15:54,281 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-30 20:15:54,288 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, mAutomataTypeConcurrency=PETRI_NET, 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 [2022-01-30 20:15:54,288 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-30 20:15:54,306 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 36 states have internal predecessors, (55), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 20:15:54,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-30 20:15:54,310 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 20:15:54,310 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 20:15:54,311 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 20:15:54,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 20:15:54,316 INFO L85 PathProgramCache]: Analyzing trace with hash -185709015, now seen corresponding path program 1 times [2022-01-30 20:15:54,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 20:15:54,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458758264] [2022-01-30 20:15:54,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:15:54,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 20:15:54,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:54,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 20:15:54,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:54,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 20:15:54,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 20:15:54,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458758264] [2022-01-30 20:15:54,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458758264] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 20:15:54,487 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 20:15:54,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-30 20:15:54,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044024784] [2022-01-30 20:15:54,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 20:15:54,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-30 20:15:54,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 20:15:54,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-30 20:15:54,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-30 20:15:54,516 INFO L87 Difference]: Start difference. First operand has 45 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 36 states have internal predecessors, (55), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 20:15:54,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 20:15:54,568 INFO L93 Difference]: Finished difference Result 82 states and 123 transitions. [2022-01-30 20:15:54,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-30 20:15:54,570 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-01-30 20:15:54,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 20:15:54,577 INFO L225 Difference]: With dead ends: 82 [2022-01-30 20:15:54,577 INFO L226 Difference]: Without dead ends: 40 [2022-01-30 20:15:54,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-30 20:15:54,582 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 43 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 20:15:54,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 56 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 20:15:54,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-30 20:15:54,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-01-30 20:15:54,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 32 states have (on average 1.3125) internal successors, (42), 32 states have internal predecessors, (42), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 20:15:54,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2022-01-30 20:15:54,614 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 16 [2022-01-30 20:15:54,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 20:15:54,614 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2022-01-30 20:15:54,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 20:15:54,615 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2022-01-30 20:15:54,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-30 20:15:54,617 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 20:15:54,617 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 20:15:54,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-30 20:15:54,618 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 20:15:54,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 20:15:54,620 INFO L85 PathProgramCache]: Analyzing trace with hash 874426105, now seen corresponding path program 1 times [2022-01-30 20:15:54,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 20:15:54,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044306026] [2022-01-30 20:15:54,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:15:54,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 20:15:54,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:54,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 20:15:54,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:54,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 20:15:54,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 20:15:54,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044306026] [2022-01-30 20:15:54,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044306026] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 20:15:54,688 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 20:15:54,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-30 20:15:54,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590485008] [2022-01-30 20:15:54,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 20:15:54,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-30 20:15:54,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 20:15:54,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-30 20:15:54,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-30 20:15:54,690 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 20:15:54,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 20:15:54,779 INFO L93 Difference]: Finished difference Result 74 states and 96 transitions. [2022-01-30 20:15:54,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-30 20:15:54,780 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-01-30 20:15:54,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 20:15:54,782 INFO L225 Difference]: With dead ends: 74 [2022-01-30 20:15:54,783 INFO L226 Difference]: Without dead ends: 42 [2022-01-30 20:15:54,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-30 20:15:54,787 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 42 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 20:15:54,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 53 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 20:15:54,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-01-30 20:15:54,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2022-01-30 20:15:54,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 33 states have (on average 1.303030303030303) internal successors, (43), 33 states have internal predecessors, (43), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 20:15:54,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2022-01-30 20:15:54,801 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 16 [2022-01-30 20:15:54,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 20:15:54,803 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2022-01-30 20:15:54,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 20:15:54,807 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2022-01-30 20:15:54,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-30 20:15:54,809 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 20:15:54,809 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 20:15:54,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-30 20:15:54,809 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 20:15:54,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 20:15:54,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1401517019, now seen corresponding path program 1 times [2022-01-30 20:15:54,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 20:15:54,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181263738] [2022-01-30 20:15:54,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:15:54,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 20:15:54,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:54,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 20:15:54,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:54,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 20:15:54,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 20:15:54,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181263738] [2022-01-30 20:15:54,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181263738] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 20:15:54,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800819840] [2022-01-30 20:15:54,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:15:54,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 20:15:54,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 20:15:54,865 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) [2022-01-30 20:15:54,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-30 20:15:54,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:54,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-30 20:15:54,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 20:15:54,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-30 20:15:54,952 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-30 20:15:54,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800819840] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 20:15:54,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-30 20:15:54,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-01-30 20:15:54,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749076618] [2022-01-30 20:15:54,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 20:15:54,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-30 20:15:54,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 20:15:54,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-30 20:15:54,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-30 20:15:54,954 INFO L87 Difference]: Start difference. First operand 41 states and 52 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 20:15:54,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 20:15:54,975 INFO L93 Difference]: Finished difference Result 72 states and 93 transitions. [2022-01-30 20:15:54,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-30 20:15:54,976 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-01-30 20:15:54,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 20:15:54,977 INFO L225 Difference]: With dead ends: 72 [2022-01-30 20:15:54,977 INFO L226 Difference]: Without dead ends: 59 [2022-01-30 20:15:54,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-30 20:15:54,978 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 24 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 20:15:54,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 82 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 20:15:54,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-01-30 20:15:54,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2022-01-30 20:15:54,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 34 states have internal predecessors, (44), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 20:15:54,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2022-01-30 20:15:54,984 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 18 [2022-01-30 20:15:54,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 20:15:54,984 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2022-01-30 20:15:54,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 20:15:54,985 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2022-01-30 20:15:54,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-30 20:15:54,985 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 20:15:54,985 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 20:15:55,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-30 20:15:55,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 20:15:55,204 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 20:15:55,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 20:15:55,204 INFO L85 PathProgramCache]: Analyzing trace with hash -2112897826, now seen corresponding path program 1 times [2022-01-30 20:15:55,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 20:15:55,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805337179] [2022-01-30 20:15:55,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:15:55,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 20:15:55,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:55,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 20:15:55,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:55,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 20:15:55,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 20:15:55,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805337179] [2022-01-30 20:15:55,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805337179] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 20:15:55,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698614663] [2022-01-30 20:15:55,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:15:55,281 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 20:15:55,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 20:15:55,296 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) [2022-01-30 20:15:55,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-30 20:15:55,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:55,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-30 20:15:55,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 20:15:55,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-30 20:15:55,400 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-30 20:15:55,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698614663] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 20:15:55,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-30 20:15:55,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-01-30 20:15:55,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220535393] [2022-01-30 20:15:55,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 20:15:55,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-30 20:15:55,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 20:15:55,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-30 20:15:55,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-30 20:15:55,407 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 20:15:55,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 20:15:55,440 INFO L93 Difference]: Finished difference Result 90 states and 119 transitions. [2022-01-30 20:15:55,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-30 20:15:55,441 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-01-30 20:15:55,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 20:15:55,442 INFO L225 Difference]: With dead ends: 90 [2022-01-30 20:15:55,442 INFO L226 Difference]: Without dead ends: 59 [2022-01-30 20:15:55,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-30 20:15:55,444 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 17 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 20:15:55,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 83 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 20:15:55,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-01-30 20:15:55,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 46. [2022-01-30 20:15:55,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 38 states have internal predecessors, (50), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 20:15:55,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2022-01-30 20:15:55,450 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 20 [2022-01-30 20:15:55,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 20:15:55,450 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2022-01-30 20:15:55,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 20:15:55,450 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2022-01-30 20:15:55,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-30 20:15:55,451 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 20:15:55,451 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 20:15:55,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-30 20:15:55,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-30 20:15:55,669 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 20:15:55,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 20:15:55,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1372722844, now seen corresponding path program 1 times [2022-01-30 20:15:55,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 20:15:55,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205661166] [2022-01-30 20:15:55,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:15:55,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 20:15:55,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:55,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 20:15:55,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:55,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 20:15:55,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 20:15:55,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205661166] [2022-01-30 20:15:55,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205661166] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 20:15:55,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092390742] [2022-01-30 20:15:55,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:15:55,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 20:15:55,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 20:15:55,740 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) [2022-01-30 20:15:55,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-30 20:15:55,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:55,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-30 20:15:55,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 20:15:55,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 20:15:55,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 20:15:55,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 20:15:55,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092390742] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 20:15:55,894 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 20:15:55,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-30 20:15:55,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648054838] [2022-01-30 20:15:55,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 20:15:55,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-30 20:15:55,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 20:15:55,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-30 20:15:55,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-30 20:15:55,896 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 20:15:56,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 20:15:56,047 INFO L93 Difference]: Finished difference Result 89 states and 117 transitions. [2022-01-30 20:15:56,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-30 20:15:56,048 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-01-30 20:15:56,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 20:15:56,049 INFO L225 Difference]: With dead ends: 89 [2022-01-30 20:15:56,049 INFO L226 Difference]: Without dead ends: 52 [2022-01-30 20:15:56,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-01-30 20:15:56,049 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 47 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 20:15:56,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 68 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 20:15:56,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-30 20:15:56,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-01-30 20:15:56,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 44 states have internal predecessors, (56), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 20:15:56,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2022-01-30 20:15:56,055 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 20 [2022-01-30 20:15:56,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 20:15:56,055 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2022-01-30 20:15:56,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 20:15:56,055 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2022-01-30 20:15:56,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-30 20:15:56,056 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 20:15:56,056 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 20:15:56,076 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-30 20:15:56,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 20:15:56,276 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 20:15:56,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 20:15:56,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1107587266, now seen corresponding path program 2 times [2022-01-30 20:15:56,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 20:15:56,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960975171] [2022-01-30 20:15:56,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:15:56,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 20:15:56,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:56,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 20:15:56,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:56,319 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-30 20:15:56,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 20:15:56,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960975171] [2022-01-30 20:15:56,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960975171] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 20:15:56,319 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 20:15:56,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-30 20:15:56,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328962363] [2022-01-30 20:15:56,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 20:15:56,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-30 20:15:56,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 20:15:56,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-30 20:15:56,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-30 20:15:56,320 INFO L87 Difference]: Start difference. First operand 52 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 20:15:56,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 20:15:56,406 INFO L93 Difference]: Finished difference Result 112 states and 149 transitions. [2022-01-30 20:15:56,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-30 20:15:56,407 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-01-30 20:15:56,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 20:15:56,407 INFO L225 Difference]: With dead ends: 112 [2022-01-30 20:15:56,407 INFO L226 Difference]: Without dead ends: 77 [2022-01-30 20:15:56,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-30 20:15:56,408 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 94 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 20:15:56,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 43 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 20:15:56,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-01-30 20:15:56,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 53. [2022-01-30 20:15:56,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 45 states have internal predecessors, (57), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 20:15:56,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 66 transitions. [2022-01-30 20:15:56,414 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 66 transitions. Word has length 26 [2022-01-30 20:15:56,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 20:15:56,414 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 66 transitions. [2022-01-30 20:15:56,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 20:15:56,414 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 66 transitions. [2022-01-30 20:15:56,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-30 20:15:56,415 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 20:15:56,415 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 20:15:56,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-30 20:15:56,415 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 20:15:56,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 20:15:56,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1533032449, now seen corresponding path program 1 times [2022-01-30 20:15:56,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 20:15:56,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358120533] [2022-01-30 20:15:56,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:15:56,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 20:15:56,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:56,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 20:15:56,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:56,485 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-30 20:15:56,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 20:15:56,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358120533] [2022-01-30 20:15:56,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358120533] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 20:15:56,485 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 20:15:56,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-30 20:15:56,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077510644] [2022-01-30 20:15:56,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 20:15:56,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-30 20:15:56,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 20:15:56,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-30 20:15:56,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-30 20:15:56,486 INFO L87 Difference]: Start difference. First operand 53 states and 66 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 20:15:56,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 20:15:56,570 INFO L93 Difference]: Finished difference Result 108 states and 143 transitions. [2022-01-30 20:15:56,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-30 20:15:56,570 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-01-30 20:15:56,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 20:15:56,571 INFO L225 Difference]: With dead ends: 108 [2022-01-30 20:15:56,571 INFO L226 Difference]: Without dead ends: 73 [2022-01-30 20:15:56,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-30 20:15:56,572 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 70 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 20:15:56,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 53 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 20:15:56,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-01-30 20:15:56,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 65. [2022-01-30 20:15:56,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 57 states have (on average 1.2982456140350878) internal successors, (74), 57 states have internal predecessors, (74), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 20:15:56,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 83 transitions. [2022-01-30 20:15:56,578 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 83 transitions. Word has length 29 [2022-01-30 20:15:56,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 20:15:56,578 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 83 transitions. [2022-01-30 20:15:56,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 20:15:56,578 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 83 transitions. [2022-01-30 20:15:56,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-30 20:15:56,579 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 20:15:56,579 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 20:15:56,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-30 20:15:56,579 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 20:15:56,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 20:15:56,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1205271623, now seen corresponding path program 1 times [2022-01-30 20:15:56,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 20:15:56,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581424089] [2022-01-30 20:15:56,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:15:56,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 20:15:56,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:56,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 20:15:56,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:56,629 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-30 20:15:56,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 20:15:56,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581424089] [2022-01-30 20:15:56,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581424089] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 20:15:56,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503952223] [2022-01-30 20:15:56,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:15:56,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 20:15:56,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 20:15:56,640 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) [2022-01-30 20:15:56,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-30 20:15:56,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:56,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-30 20:15:56,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 20:15:56,730 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-30 20:15:56,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 20:15:56,813 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-30 20:15:56,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503952223] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 20:15:56,814 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 20:15:56,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-01-30 20:15:56,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169853298] [2022-01-30 20:15:56,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 20:15:56,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-30 20:15:56,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 20:15:56,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-30 20:15:56,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-30 20:15:56,816 INFO L87 Difference]: Start difference. First operand 65 states and 83 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 20:15:56,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 20:15:56,991 INFO L93 Difference]: Finished difference Result 127 states and 168 transitions. [2022-01-30 20:15:56,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-30 20:15:56,991 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-01-30 20:15:56,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 20:15:56,992 INFO L225 Difference]: With dead ends: 127 [2022-01-30 20:15:56,992 INFO L226 Difference]: Without dead ends: 77 [2022-01-30 20:15:56,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2022-01-30 20:15:56,993 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 64 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 20:15:56,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 63 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 20:15:56,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-01-30 20:15:56,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-01-30 20:15:56,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 69 states have (on average 1.2463768115942029) internal successors, (86), 69 states have internal predecessors, (86), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 20:15:56,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 95 transitions. [2022-01-30 20:15:56,999 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 95 transitions. Word has length 30 [2022-01-30 20:15:56,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 20:15:57,000 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 95 transitions. [2022-01-30 20:15:57,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 20:15:57,000 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 95 transitions. [2022-01-30 20:15:57,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-30 20:15:57,000 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 20:15:57,000 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 20:15:57,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-30 20:15:57,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 20:15:57,216 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 20:15:57,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 20:15:57,217 INFO L85 PathProgramCache]: Analyzing trace with hash 270185605, now seen corresponding path program 2 times [2022-01-30 20:15:57,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 20:15:57,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141648583] [2022-01-30 20:15:57,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:15:57,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 20:15:57,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:57,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 20:15:57,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:57,338 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-30 20:15:57,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 20:15:57,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141648583] [2022-01-30 20:15:57,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141648583] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 20:15:57,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947270993] [2022-01-30 20:15:57,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 20:15:57,338 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 20:15:57,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 20:15:57,345 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) [2022-01-30 20:15:57,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-30 20:15:57,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-30 20:15:57,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 20:15:57,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-30 20:15:57,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 20:15:57,491 INFO L353 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2022-01-30 20:15:57,492 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 31 [2022-01-30 20:15:57,523 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-30 20:15:57,554 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-01-30 20:15:57,554 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-30 20:15:57,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947270993] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 20:15:57,554 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-30 20:15:57,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [14] total 20 [2022-01-30 20:15:57,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494942332] [2022-01-30 20:15:57,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 20:15:57,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-30 20:15:57,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 20:15:57,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-30 20:15:57,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2022-01-30 20:15:57,556 INFO L87 Difference]: Start difference. First operand 77 states and 95 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 20:15:57,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 20:15:57,627 INFO L93 Difference]: Finished difference Result 91 states and 111 transitions. [2022-01-30 20:15:57,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-30 20:15:57,627 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-01-30 20:15:57,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 20:15:57,628 INFO L225 Difference]: With dead ends: 91 [2022-01-30 20:15:57,628 INFO L226 Difference]: Without dead ends: 89 [2022-01-30 20:15:57,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2022-01-30 20:15:57,629 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 57 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 20:15:57,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 199 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 20:15:57,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-01-30 20:15:57,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 82. [2022-01-30 20:15:57,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 72 states have (on average 1.2361111111111112) internal successors, (89), 73 states have internal predecessors, (89), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 20:15:57,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 100 transitions. [2022-01-30 20:15:57,635 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 100 transitions. Word has length 42 [2022-01-30 20:15:57,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 20:15:57,635 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 100 transitions. [2022-01-30 20:15:57,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 20:15:57,635 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 100 transitions. [2022-01-30 20:15:57,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-30 20:15:57,636 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 20:15:57,636 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 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] [2022-01-30 20:15:57,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-30 20:15:57,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 20:15:57,856 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 20:15:57,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 20:15:57,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1371551035, now seen corresponding path program 1 times [2022-01-30 20:15:57,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 20:15:57,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471540520] [2022-01-30 20:15:57,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:15:57,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 20:15:57,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:58,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 20:15:58,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:58,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-30 20:15:58,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:58,020 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-30 20:15:58,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 20:15:58,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471540520] [2022-01-30 20:15:58,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471540520] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 20:15:58,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797419499] [2022-01-30 20:15:58,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:15:58,021 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 20:15:58,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 20:15:58,022 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) [2022-01-30 20:15:58,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-30 20:15:58,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:58,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-30 20:15:58,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 20:15:58,145 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-30 20:15:58,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 20:15:58,364 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-30 20:15:58,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797419499] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 20:15:58,364 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 20:15:58,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-01-30 20:15:58,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354865558] [2022-01-30 20:15:58,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 20:15:58,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-30 20:15:58,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 20:15:58,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-30 20:15:58,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-30 20:15:58,366 INFO L87 Difference]: Start difference. First operand 82 states and 100 transitions. Second operand has 26 states, 26 states have (on average 2.730769230769231) internal successors, (71), 25 states have internal predecessors, (71), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-30 20:15:58,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 20:15:58,712 INFO L93 Difference]: Finished difference Result 161 states and 208 transitions. [2022-01-30 20:15:58,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-30 20:15:58,713 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.730769230769231) internal successors, (71), 25 states have internal predecessors, (71), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2022-01-30 20:15:58,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 20:15:58,715 INFO L225 Difference]: With dead ends: 161 [2022-01-30 20:15:58,715 INFO L226 Difference]: Without dead ends: 106 [2022-01-30 20:15:58,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=853, Invalid=1403, Unknown=0, NotChecked=0, Total=2256 [2022-01-30 20:15:58,716 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 94 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 20:15:58,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 53 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 20:15:58,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-01-30 20:15:58,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2022-01-30 20:15:58,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 97 states have internal predecessors, (113), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 20:15:58,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 124 transitions. [2022-01-30 20:15:58,723 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 124 transitions. Word has length 50 [2022-01-30 20:15:58,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 20:15:58,723 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 124 transitions. [2022-01-30 20:15:58,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.730769230769231) internal successors, (71), 25 states have internal predecessors, (71), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-30 20:15:58,724 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 124 transitions. [2022-01-30 20:15:58,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-30 20:15:58,724 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 20:15:58,724 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 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] [2022-01-30 20:15:58,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-30 20:15:58,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 20:15:58,943 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 20:15:58,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 20:15:58,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1727596755, now seen corresponding path program 2 times [2022-01-30 20:15:58,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 20:15:58,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137892861] [2022-01-30 20:15:58,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:15:58,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 20:15:58,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:59,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 20:15:59,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:59,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-30 20:15:59,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:59,216 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 2 proven. 484 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-30 20:15:59,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 20:15:59,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137892861] [2022-01-30 20:15:59,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137892861] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 20:15:59,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845249618] [2022-01-30 20:15:59,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 20:15:59,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 20:15:59,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 20:15:59,221 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) [2022-01-30 20:15:59,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-30 20:15:59,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 20:15:59,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 20:15:59,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-30 20:15:59,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 20:15:59,396 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-30 20:15:59,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 20:16:00,017 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 2 proven. 484 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-30 20:16:00,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845249618] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 20:16:00,017 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 20:16:00,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-01-30 20:16:00,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642667827] [2022-01-30 20:16:00,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 20:16:00,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-30 20:16:00,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 20:16:00,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-30 20:16:00,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-30 20:16:00,020 INFO L87 Difference]: Start difference. First operand 106 states and 124 transitions. Second operand has 50 states, 50 states have (on average 2.38) internal successors, (119), 49 states have internal predecessors, (119), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-30 20:16:00,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 20:16:00,985 INFO L93 Difference]: Finished difference Result 209 states and 268 transitions. [2022-01-30 20:16:00,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-30 20:16:00,985 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.38) internal successors, (119), 49 states have internal predecessors, (119), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 74 [2022-01-30 20:16:00,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 20:16:00,986 INFO L225 Difference]: With dead ends: 209 [2022-01-30 20:16:00,986 INFO L226 Difference]: Without dead ends: 154 [2022-01-30 20:16:00,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3433, Invalid=5687, Unknown=0, NotChecked=0, Total=9120 [2022-01-30 20:16:00,990 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 154 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-30 20:16:00,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 73 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-30 20:16:00,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-01-30 20:16:00,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2022-01-30 20:16:00,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 144 states have (on average 1.1180555555555556) internal successors, (161), 145 states have internal predecessors, (161), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 20:16:00,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 172 transitions. [2022-01-30 20:16:00,997 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 172 transitions. Word has length 74 [2022-01-30 20:16:00,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 20:16:00,997 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 172 transitions. [2022-01-30 20:16:00,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.38) internal successors, (119), 49 states have internal predecessors, (119), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-30 20:16:00,997 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 172 transitions. [2022-01-30 20:16:00,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-01-30 20:16:00,998 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 20:16:00,998 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 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] [2022-01-30 20:16:01,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-30 20:16:01,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 20:16:01,215 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 20:16:01,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 20:16:01,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1993287677, now seen corresponding path program 3 times [2022-01-30 20:16:01,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 20:16:01,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392468853] [2022-01-30 20:16:01,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:16:01,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 20:16:01,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:16:02,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 20:16:02,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:16:02,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-30 20:16:02,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:16:02,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 2 proven. 2116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-30 20:16:02,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 20:16:02,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392468853] [2022-01-30 20:16:02,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392468853] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 20:16:02,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890663903] [2022-01-30 20:16:02,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-30 20:16:02,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 20:16:02,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 20:16:02,111 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) [2022-01-30 20:16:02,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-30 20:16:02,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-30 20:16:02,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 20:16:02,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-30 20:16:02,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 20:16:02,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2120 trivial. 0 not checked. [2022-01-30 20:16:02,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 20:16:02,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2118 trivial. 0 not checked. [2022-01-30 20:16:02,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890663903] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 20:16:02,586 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 20:16:02,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 5, 5] total 56 [2022-01-30 20:16:02,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912945938] [2022-01-30 20:16:02,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 20:16:02,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-30 20:16:02,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 20:16:02,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-30 20:16:02,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1197, Invalid=1883, Unknown=0, NotChecked=0, Total=3080 [2022-01-30 20:16:02,589 INFO L87 Difference]: Start difference. First operand 154 states and 172 transitions. Second operand has 56 states, 56 states have (on average 2.392857142857143) internal successors, (134), 55 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-30 20:16:04,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 20:16:04,273 INFO L93 Difference]: Finished difference Result 262 states and 326 transitions. [2022-01-30 20:16:04,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-30 20:16:04,273 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.392857142857143) internal successors, (134), 55 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 122 [2022-01-30 20:16:04,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 20:16:04,274 INFO L225 Difference]: With dead ends: 262 [2022-01-30 20:16:04,274 INFO L226 Difference]: Without dead ends: 207 [2022-01-30 20:16:04,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1913 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3820, Invalid=8612, Unknown=0, NotChecked=0, Total=12432 [2022-01-30 20:16:04,277 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 373 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-30 20:16:04,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 66 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-30 20:16:04,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-01-30 20:16:04,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 185. [2022-01-30 20:16:04,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 174 states have (on average 1.1379310344827587) internal successors, (198), 175 states have internal predecessors, (198), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-30 20:16:04,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 211 transitions. [2022-01-30 20:16:04,287 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 211 transitions. Word has length 122 [2022-01-30 20:16:04,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 20:16:04,288 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 211 transitions. [2022-01-30 20:16:04,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.392857142857143) internal successors, (134), 55 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-30 20:16:04,288 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 211 transitions. [2022-01-30 20:16:04,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-01-30 20:16:04,289 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 20:16:04,289 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 20:16:04,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-30 20:16:04,505 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,SelfDestructingSolverStorable11 [2022-01-30 20:16:04,505 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 20:16:04,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 20:16:04,506 INFO L85 PathProgramCache]: Analyzing trace with hash 389812694, now seen corresponding path program 4 times [2022-01-30 20:16:04,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 20:16:04,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750221083] [2022-01-30 20:16:04,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:16:04,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 20:16:04,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:16:05,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 20:16:05,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:16:05,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-01-30 20:16:05,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:16:05,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2235 backedges. 2 proven. 2209 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-30 20:16:05,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 20:16:05,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750221083] [2022-01-30 20:16:05,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750221083] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 20:16:05,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497194017] [2022-01-30 20:16:05,429 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-30 20:16:05,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 20:16:05,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 20:16:05,430 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) [2022-01-30 20:16:05,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-30 20:16:05,558 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-30 20:16:05,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 20:16:05,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-30 20:16:05,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 20:16:05,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2235 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-30 20:16:05,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 20:16:07,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2235 backedges. 2 proven. 2209 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-30 20:16:07,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497194017] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 20:16:07,967 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 20:16:07,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 100 [2022-01-30 20:16:07,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249433717] [2022-01-30 20:16:07,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 20:16:07,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-01-30 20:16:07,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 20:16:07,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-01-30 20:16:07,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2022-01-30 20:16:07,970 INFO L87 Difference]: Start difference. First operand 185 states and 211 transitions. Second operand has 100 states, 100 states have (on average 2.19) internal successors, (219), 99 states have internal predecessors, (219), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-30 20:16:10,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 20:16:10,446 INFO L93 Difference]: Finished difference Result 367 states and 467 transitions. [2022-01-30 20:16:10,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-30 20:16:10,447 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.19) internal successors, (219), 99 states have internal predecessors, (219), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 133 [2022-01-30 20:16:10,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 20:16:10,449 INFO L225 Difference]: With dead ends: 367 [2022-01-30 20:16:10,449 INFO L226 Difference]: Without dead ends: 283 [2022-01-30 20:16:10,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5970 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=14358, Invalid=23862, Unknown=0, NotChecked=0, Total=38220 [2022-01-30 20:16:10,454 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 279 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-30 20:16:10,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 78 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-30 20:16:10,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-01-30 20:16:10,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 283. [2022-01-30 20:16:10,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 272 states have (on average 1.088235294117647) internal successors, (296), 273 states have internal predecessors, (296), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-30 20:16:10,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 309 transitions. [2022-01-30 20:16:10,463 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 309 transitions. Word has length 133 [2022-01-30 20:16:10,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 20:16:10,464 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 309 transitions. [2022-01-30 20:16:10,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.19) internal successors, (219), 99 states have internal predecessors, (219), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-30 20:16:10,464 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 309 transitions. [2022-01-30 20:16:10,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-01-30 20:16:10,465 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 20:16:10,465 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 20:16:10,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-30 20:16:10,679 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,SelfDestructingSolverStorable12 [2022-01-30 20:16:10,679 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 20:16:10,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 20:16:10,680 INFO L85 PathProgramCache]: Analyzing trace with hash -11549740, now seen corresponding path program 5 times [2022-01-30 20:16:10,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 20:16:10,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135444594] [2022-01-30 20:16:10,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:16:10,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 20:16:10,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:16:12,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 20:16:12,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:16:12,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 219 [2022-01-30 20:16:12,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:16:12,841 INFO L134 CoverageAnalysis]: Checked inductivity of 9242 backedges. 2 proven. 9216 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-30 20:16:12,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 20:16:12,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135444594] [2022-01-30 20:16:12,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135444594] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 20:16:12,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437666385] [2022-01-30 20:16:12,841 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-30 20:16:12,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 20:16:12,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 20:16:12,842 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) [2022-01-30 20:16:12,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process