/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-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-30 20:15:56,083 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-30 20:15:56,084 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-30 20:15:56,103 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-30 20:15:56,157 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-30 20:15:56,158 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-30 20:15:56,158 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-30 20:15:56,159 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 20:15:56,172 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-30 20:15:56,172 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-30 20:15:56,172 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-30 20:15:56,172 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-30 20:15:56,173 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-30 20:15:56,173 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-30 20:15:56,173 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-30 20:15:56,173 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-30 20:15:56,173 INFO L138 SettingsManager]: * Use SBE=true [2022-01-30 20:15:56,174 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-30 20:15:56,174 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-30 20:15:56,174 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-30 20:15:56,174 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-30 20:15:56,174 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-30 20:15:56,174 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-30 20:15:56,174 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-30 20:15:56,174 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-30 20:15:56,174 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-30 20:15:56,175 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-30 20:15:56,175 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-30 20:15:56,175 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-30 20:15:56,175 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-30 20:15:56,175 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-30 20:15:56,175 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-30 20:15:56,175 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-30 20:15:56,175 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-30 20:15:56,175 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-30 20:15:56,175 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-30 20:15:56,175 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-30 20:15:56,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-30 20:15:56,176 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-30 20:15:56,176 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-30 20:15:56,176 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-30 20:15:56,176 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-30 20:15:56,349 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-30 20:15:56,365 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-30 20:15:56,367 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-30 20:15:56,368 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-30 20:15:56,368 INFO L275 PluginConnector]: CDTParser initialized [2022-01-30 20:15:56,369 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-2.i [2022-01-30 20:15:56,413 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e98c0fe58/d191f91a9ffb41038c4300a245e8ca42/FLAG53f74193c [2022-01-30 20:15:56,739 INFO L306 CDTParser]: Found 1 translation units. [2022-01-30 20:15:56,739 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-2.i [2022-01-30 20:15:56,744 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e98c0fe58/d191f91a9ffb41038c4300a245e8ca42/FLAG53f74193c [2022-01-30 20:15:57,169 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e98c0fe58/d191f91a9ffb41038c4300a245e8ca42 [2022-01-30 20:15:57,170 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-30 20:15:57,174 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-30 20:15:57,177 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-30 20:15:57,177 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-30 20:15:57,180 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-30 20:15:57,180 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 08:15:57" (1/1) ... [2022-01-30 20:15:57,182 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b73c518 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 08:15:57, skipping insertion in model container [2022-01-30 20:15:57,182 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 08:15:57" (1/1) ... [2022-01-30 20:15:57,188 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-30 20:15:57,198 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-30 20:15:57,310 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-2.i[823,836] [2022-01-30 20:15:57,341 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-30 20:15:57,345 INFO L203 MainTranslator]: Completed pre-run [2022-01-30 20:15:57,359 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-2.i[823,836] [2022-01-30 20:15:57,373 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-30 20:15:57,384 INFO L208 MainTranslator]: Completed translation [2022-01-30 20:15:57,384 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 08:15:57 WrapperNode [2022-01-30 20:15:57,384 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-30 20:15:57,385 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-30 20:15:57,385 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-30 20:15:57,385 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-30 20:15:57,392 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 08:15:57" (1/1) ... [2022-01-30 20:15:57,392 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 08:15:57" (1/1) ... [2022-01-30 20:15:57,399 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 08:15:57" (1/1) ... [2022-01-30 20:15:57,399 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 08:15:57" (1/1) ... [2022-01-30 20:15:57,404 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 08:15:57" (1/1) ... [2022-01-30 20:15:57,408 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 08:15:57" (1/1) ... [2022-01-30 20:15:57,409 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 08:15:57" (1/1) ... [2022-01-30 20:15:57,410 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-30 20:15:57,410 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-30 20:15:57,411 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-30 20:15:57,411 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-30 20:15:57,413 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 08:15:57" (1/1) ... [2022-01-30 20:15:57,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-30 20:15:57,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 20:15:57,489 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 20:15:57,502 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 20:15:57,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-30 20:15:57,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-30 20:15:57,526 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-30 20:15:57,526 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-30 20:15:57,527 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-30 20:15:57,528 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-30 20:15:57,528 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-30 20:15:57,528 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-30 20:15:57,529 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-30 20:15:57,529 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-30 20:15:57,529 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-30 20:15:57,529 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-30 20:15:57,529 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-30 20:15:57,529 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-30 20:15:57,529 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-30 20:15:57,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-30 20:15:57,532 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-30 20:15:57,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-30 20:15:57,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-30 20:15:57,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-30 20:15:57,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-30 20:15:57,602 INFO L234 CfgBuilder]: Building ICFG [2022-01-30 20:15:57,603 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-30 20:15:57,745 INFO L275 CfgBuilder]: Performing block encoding [2022-01-30 20:15:57,749 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-30 20:15:57,749 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2022-01-30 20:15:57,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 08:15:57 BoogieIcfgContainer [2022-01-30 20:15:57,751 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-30 20:15:57,752 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-30 20:15:57,752 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-30 20:15:57,767 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-30 20:15:57,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.01 08:15:57" (1/3) ... [2022-01-30 20:15:57,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19676b8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 08:15:57, skipping insertion in model container [2022-01-30 20:15:57,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 08:15:57" (2/3) ... [2022-01-30 20:15:57,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19676b8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 08:15:57, skipping insertion in model container [2022-01-30 20:15:57,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 08:15:57" (3/3) ... [2022-01-30 20:15:57,769 INFO L111 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_ground-2.i [2022-01-30 20:15:57,774 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-30 20:15:57,774 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-30 20:15:57,834 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-30 20:15:57,838 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 20:15:57,839 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-30 20:15:57,849 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 20:15:57,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-30 20:15:57,856 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 20:15:57,860 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 20:15:57,861 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 20:15:57,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 20:15:57,867 INFO L85 PathProgramCache]: Analyzing trace with hash -185709015, now seen corresponding path program 1 times [2022-01-30 20:15:57,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 20:15:57,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581661159] [2022-01-30 20:15:57,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:15:57,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 20:15:57,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:58,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 20:15:58,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:58,039 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 20:15:58,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 20:15:58,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581661159] [2022-01-30 20:15:58,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581661159] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 20:15:58,040 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 20:15:58,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-30 20:15:58,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55713794] [2022-01-30 20:15:58,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 20:15:58,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-30 20:15:58,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 20:15:58,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-30 20:15:58,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-30 20:15:58,063 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 20:15:58,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 20:15:58,097 INFO L93 Difference]: Finished difference Result 82 states and 123 transitions. [2022-01-30 20:15:58,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-30 20:15:58,099 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 20:15:58,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 20:15:58,104 INFO L225 Difference]: With dead ends: 82 [2022-01-30 20:15:58,104 INFO L226 Difference]: Without dead ends: 40 [2022-01-30 20:15:58,106 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 20:15:58,108 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 20:15:58,109 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 20:15:58,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-30 20:15:58,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-01-30 20:15:58,138 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 20:15:58,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2022-01-30 20:15:58,139 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 16 [2022-01-30 20:15:58,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 20:15:58,140 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2022-01-30 20:15:58,140 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 20:15:58,140 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2022-01-30 20:15:58,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-30 20:15:58,141 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 20:15:58,141 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 20:15:58,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-30 20:15:58,142 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 20:15:58,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 20:15:58,142 INFO L85 PathProgramCache]: Analyzing trace with hash 874426105, now seen corresponding path program 1 times [2022-01-30 20:15:58,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 20:15:58,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856548460] [2022-01-30 20:15:58,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:15:58,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 20:15:58,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:58,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 20:15:58,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:58,183 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 20:15:58,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 20:15:58,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856548460] [2022-01-30 20:15:58,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856548460] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 20:15:58,183 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 20:15:58,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-30 20:15:58,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330112481] [2022-01-30 20:15:58,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 20:15:58,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-30 20:15:58,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 20:15:58,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-30 20:15:58,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-30 20:15:58,186 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 20:15:58,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 20:15:58,280 INFO L93 Difference]: Finished difference Result 74 states and 96 transitions. [2022-01-30 20:15:58,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-30 20:15:58,280 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 20:15:58,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 20:15:58,283 INFO L225 Difference]: With dead ends: 74 [2022-01-30 20:15:58,283 INFO L226 Difference]: Without dead ends: 42 [2022-01-30 20:15:58,286 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 20:15:58,289 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 20:15:58,290 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 20:15:58,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-01-30 20:15:58,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2022-01-30 20:15:58,294 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 20:15:58,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2022-01-30 20:15:58,295 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 16 [2022-01-30 20:15:58,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 20:15:58,295 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2022-01-30 20:15:58,296 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 20:15:58,296 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2022-01-30 20:15:58,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-30 20:15:58,296 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 20:15:58,296 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 20:15:58,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-30 20:15:58,297 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 20:15:58,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 20:15:58,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1401517019, now seen corresponding path program 1 times [2022-01-30 20:15:58,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 20:15:58,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370934849] [2022-01-30 20:15:58,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:15:58,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 20:15:58,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:58,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 20:15:58,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:58,354 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 20:15:58,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 20:15:58,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370934849] [2022-01-30 20:15:58,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370934849] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 20:15:58,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195276182] [2022-01-30 20:15:58,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:15:58,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 20:15:58,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 20:15:58,360 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 20:15:58,361 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 20:15:58,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:58,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-30 20:15:58,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 20:15:58,457 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 20:15:58,457 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-30 20:15:58,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195276182] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 20:15:58,458 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-30 20:15:58,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-01-30 20:15:58,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312004973] [2022-01-30 20:15:58,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 20:15:58,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-30 20:15:58,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 20:15:58,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-30 20:15:58,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-30 20:15:58,463 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 20:15:58,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 20:15:58,505 INFO L93 Difference]: Finished difference Result 72 states and 93 transitions. [2022-01-30 20:15:58,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-30 20:15:58,505 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 20:15:58,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 20:15:58,506 INFO L225 Difference]: With dead ends: 72 [2022-01-30 20:15:58,506 INFO L226 Difference]: Without dead ends: 59 [2022-01-30 20:15:58,507 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 20:15:58,509 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 24 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 20:15:58,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 80 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 20:15:58,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-01-30 20:15:58,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2022-01-30 20:15:58,523 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 20:15:58,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2022-01-30 20:15:58,524 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 18 [2022-01-30 20:15:58,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 20:15:58,524 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2022-01-30 20:15:58,524 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 20:15:58,525 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2022-01-30 20:15:58,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-30 20:15:58,525 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 20:15:58,525 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 20:15:58,543 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-30 20:15:58,745 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 20:15:58,745 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 20:15:58,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 20:15:58,745 INFO L85 PathProgramCache]: Analyzing trace with hash -2112897826, now seen corresponding path program 1 times [2022-01-30 20:15:58,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 20:15:58,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199670558] [2022-01-30 20:15:58,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:15:58,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 20:15:58,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:58,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 20:15:58,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:58,797 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 20:15:58,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 20:15:58,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199670558] [2022-01-30 20:15:58,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199670558] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 20:15:58,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212361412] [2022-01-30 20:15:58,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:15:58,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 20:15:58,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 20:15:58,799 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 20:15:58,803 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 20:15:58,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:58,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-30 20:15:58,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 20:15:58,886 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 20:15:58,887 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-30 20:15:58,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212361412] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 20:15:58,887 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-30 20:15:58,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-01-30 20:15:58,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778843531] [2022-01-30 20:15:58,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 20:15:58,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-30 20:15:58,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 20:15:58,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-30 20:15:58,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-30 20:15:58,888 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 20:15:58,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 20:15:58,910 INFO L93 Difference]: Finished difference Result 90 states and 119 transitions. [2022-01-30 20:15:58,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-30 20:15:58,910 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 20:15:58,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 20:15:58,921 INFO L225 Difference]: With dead ends: 90 [2022-01-30 20:15:58,921 INFO L226 Difference]: Without dead ends: 59 [2022-01-30 20:15:58,922 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 20:15:58,923 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 17 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 20:15:58,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 81 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 20:15:58,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-01-30 20:15:58,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 46. [2022-01-30 20:15:58,935 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 20:15:58,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2022-01-30 20:15:58,937 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 20 [2022-01-30 20:15:58,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 20:15:58,938 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2022-01-30 20:15:58,938 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 20:15:58,938 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2022-01-30 20:15:58,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-30 20:15:58,939 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 20:15:58,939 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 20:15:58,954 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-30 20:15:59,148 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 20:15:59,148 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 20:15:59,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 20:15:59,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1372722844, now seen corresponding path program 1 times [2022-01-30 20:15:59,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 20:15:59,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622824511] [2022-01-30 20:15:59,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:15:59,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 20:15:59,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:59,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 20:15:59,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:59,193 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 20:15:59,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 20:15:59,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622824511] [2022-01-30 20:15:59,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622824511] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 20:15:59,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108693351] [2022-01-30 20:15:59,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:15:59,193 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 20:15:59,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 20:15:59,195 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 20:15:59,196 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 20:15:59,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:59,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-30 20:15:59,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 20:15:59,286 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 20:15:59,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 20:15:59,354 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 20:15:59,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108693351] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 20:15:59,355 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 20:15:59,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-30 20:15:59,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273565680] [2022-01-30 20:15:59,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 20:15:59,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-30 20:15:59,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 20:15:59,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-30 20:15:59,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-30 20:15:59,356 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 20:15:59,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 20:15:59,505 INFO L93 Difference]: Finished difference Result 89 states and 117 transitions. [2022-01-30 20:15:59,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-30 20:15:59,506 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 20:15:59,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 20:15:59,506 INFO L225 Difference]: With dead ends: 89 [2022-01-30 20:15:59,506 INFO L226 Difference]: Without dead ends: 52 [2022-01-30 20:15:59,506 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 20:15:59,507 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 20:15:59,507 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 20:15:59,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-30 20:15:59,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-01-30 20:15:59,520 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 20:15:59,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2022-01-30 20:15:59,522 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 20 [2022-01-30 20:15:59,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 20:15:59,522 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2022-01-30 20:15:59,523 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 20:15:59,523 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2022-01-30 20:15:59,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-30 20:15:59,523 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 20:15:59,524 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 20:15:59,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-30 20:15:59,726 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 20:15:59,726 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 20:15:59,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 20:15:59,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1107587266, now seen corresponding path program 2 times [2022-01-30 20:15:59,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 20:15:59,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735412654] [2022-01-30 20:15:59,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:15:59,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 20:15:59,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:59,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 20:15:59,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:59,775 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 20:15:59,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 20:15:59,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735412654] [2022-01-30 20:15:59,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735412654] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 20:15:59,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 20:15:59,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-30 20:15:59,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308834522] [2022-01-30 20:15:59,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 20:15:59,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-30 20:15:59,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 20:15:59,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-30 20:15:59,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-30 20:15:59,776 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 20:15:59,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 20:15:59,870 INFO L93 Difference]: Finished difference Result 112 states and 149 transitions. [2022-01-30 20:15:59,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-30 20:15:59,870 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 20:15:59,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 20:15:59,871 INFO L225 Difference]: With dead ends: 112 [2022-01-30 20:15:59,871 INFO L226 Difference]: Without dead ends: 77 [2022-01-30 20:15:59,873 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 20:15:59,874 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 94 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 20:15:59,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 42 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 20:15:59,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-01-30 20:15:59,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 53. [2022-01-30 20:15:59,887 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 20:15:59,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 66 transitions. [2022-01-30 20:15:59,887 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 66 transitions. Word has length 26 [2022-01-30 20:15:59,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 20:15:59,887 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 66 transitions. [2022-01-30 20:15:59,888 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 20:15:59,888 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 66 transitions. [2022-01-30 20:15:59,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-30 20:15:59,890 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 20:15:59,890 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 20:15:59,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-30 20:15:59,890 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 20:15:59,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 20:15:59,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1533032449, now seen corresponding path program 1 times [2022-01-30 20:15:59,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 20:15:59,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530879970] [2022-01-30 20:15:59,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:15:59,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 20:15:59,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:59,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 20:15:59,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:59,954 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 20:15:59,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 20:15:59,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530879970] [2022-01-30 20:15:59,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530879970] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 20:15:59,954 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 20:15:59,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-30 20:15:59,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750336284] [2022-01-30 20:15:59,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 20:15:59,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-30 20:15:59,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 20:15:59,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-30 20:15:59,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-30 20:15:59,955 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 20:16:00,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 20:16:00,048 INFO L93 Difference]: Finished difference Result 108 states and 143 transitions. [2022-01-30 20:16:00,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-30 20:16:00,051 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 20:16:00,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 20:16:00,052 INFO L225 Difference]: With dead ends: 108 [2022-01-30 20:16:00,052 INFO L226 Difference]: Without dead ends: 73 [2022-01-30 20:16:00,052 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 20:16:00,053 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 69 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 20:16:00,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 52 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 20:16:00,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-01-30 20:16:00,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 65. [2022-01-30 20:16:00,058 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 20:16:00,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 83 transitions. [2022-01-30 20:16:00,058 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 83 transitions. Word has length 29 [2022-01-30 20:16:00,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 20:16:00,059 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 83 transitions. [2022-01-30 20:16:00,059 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 20:16:00,059 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 83 transitions. [2022-01-30 20:16:00,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-30 20:16:00,059 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 20:16:00,060 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 20:16:00,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-30 20:16:00,060 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 20:16:00,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 20:16:00,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1205271623, now seen corresponding path program 1 times [2022-01-30 20:16:00,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 20:16:00,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217576642] [2022-01-30 20:16:00,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:16:00,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 20:16:00,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:16:00,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 20:16:00,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:16:00,109 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 20:16:00,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 20:16:00,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217576642] [2022-01-30 20:16:00,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217576642] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 20:16:00,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010768656] [2022-01-30 20:16:00,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:16:00,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 20:16:00,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 20:16:00,111 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 20:16:00,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-30 20:16:00,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:16:00,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-30 20:16:00,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 20:16:00,205 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 20:16:00,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 20:16:00,294 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 20:16:00,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010768656] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 20:16:00,295 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 20:16:00,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-01-30 20:16:00,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536241839] [2022-01-30 20:16:00,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 20:16:00,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-30 20:16:00,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 20:16:00,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-30 20:16:00,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-30 20:16:00,296 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 20:16:00,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 20:16:00,452 INFO L93 Difference]: Finished difference Result 127 states and 168 transitions. [2022-01-30 20:16:00,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-30 20:16:00,452 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 20:16:00,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 20:16:00,453 INFO L225 Difference]: With dead ends: 127 [2022-01-30 20:16:00,453 INFO L226 Difference]: Without dead ends: 77 [2022-01-30 20:16:00,453 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 20:16:00,453 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 20:16:00,454 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 20:16:00,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-01-30 20:16:00,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-01-30 20:16:00,457 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 20:16:00,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 95 transitions. [2022-01-30 20:16:00,458 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 95 transitions. Word has length 30 [2022-01-30 20:16:00,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 20:16:00,458 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 95 transitions. [2022-01-30 20:16:00,458 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 20:16:00,458 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 95 transitions. [2022-01-30 20:16:00,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-30 20:16:00,459 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 20:16:00,459 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 20:16:00,474 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 20:16:00,674 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 20:16:00,674 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 20:16:00,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 20:16:00,675 INFO L85 PathProgramCache]: Analyzing trace with hash 270185605, now seen corresponding path program 2 times [2022-01-30 20:16:00,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 20:16:00,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44470577] [2022-01-30 20:16:00,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:16:00,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 20:16:00,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:16:00,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 20:16:00,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:16:00,765 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 20:16:00,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 20:16:00,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44470577] [2022-01-30 20:16:00,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44470577] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 20:16:00,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202790798] [2022-01-30 20:16:00,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 20:16:00,765 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 20:16:00,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 20:16:00,766 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 20:16:00,767 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 20:16:00,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-30 20:16:00,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 20:16:00,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-30 20:16:00,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 20:16:00,867 INFO L353 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2022-01-30 20:16:00,867 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 20:16:00,894 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 23 treesize of output 7 [2022-01-30 20:16:00,928 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 20:16:00,928 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-30 20:16:00,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202790798] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 20:16:00,928 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-30 20:16:00,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 18 [2022-01-30 20:16:00,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342798967] [2022-01-30 20:16:00,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 20:16:00,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-30 20:16:00,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 20:16:00,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-30 20:16:00,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2022-01-30 20:16:00,929 INFO L87 Difference]: Start difference. First operand 77 states and 95 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 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 20:16:00,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 20:16:00,972 INFO L93 Difference]: Finished difference Result 88 states and 107 transitions. [2022-01-30 20:16:00,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-30 20:16:00,972 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 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 20:16:00,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 20:16:00,973 INFO L225 Difference]: With dead ends: 88 [2022-01-30 20:16:00,973 INFO L226 Difference]: Without dead ends: 86 [2022-01-30 20:16:00,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2022-01-30 20:16:00,975 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 8 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 20:16:00,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 212 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 20:16:00,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-01-30 20:16:00,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2022-01-30 20:16:00,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 73 states have (on average 1.2465753424657535) internal successors, (91), 74 states have internal predecessors, (91), 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 20:16:00,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 102 transitions. [2022-01-30 20:16:00,982 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 102 transitions. Word has length 42 [2022-01-30 20:16:00,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 20:16:00,982 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 102 transitions. [2022-01-30 20:16:00,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 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 20:16:00,982 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 102 transitions. [2022-01-30 20:16:00,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-30 20:16:00,983 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 20:16:00,983 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 20:16:01,003 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 20:16:01,201 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 20:16:01,203 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 20:16:01,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 20:16:01,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1371551035, now seen corresponding path program 1 times [2022-01-30 20:16:01,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 20:16:01,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439163861] [2022-01-30 20:16:01,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:16:01,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 20:16:01,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:16:01,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 20:16:01,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:16:01,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-30 20:16:01,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:16:01,333 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 20:16:01,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 20:16:01,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439163861] [2022-01-30 20:16:01,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439163861] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 20:16:01,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964753752] [2022-01-30 20:16:01,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:16:01,334 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 20:16:01,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 20:16:01,335 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 20:16:01,336 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 20:16:01,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:16:01,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-30 20:16:01,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 20:16:01,471 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 20:16:01,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 20:16:01,707 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 20:16:01,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964753752] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 20:16:01,708 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 20:16:01,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-01-30 20:16:01,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604502788] [2022-01-30 20:16:01,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 20:16:01,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-30 20:16:01,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 20:16:01,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-30 20:16:01,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-30 20:16:01,711 INFO L87 Difference]: Start difference. First operand 83 states and 102 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 20:16:02,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 20:16:02,050 INFO L93 Difference]: Finished difference Result 163 states and 212 transitions. [2022-01-30 20:16:02,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-30 20:16:02,051 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 20:16:02,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 20:16:02,052 INFO L225 Difference]: With dead ends: 163 [2022-01-30 20:16:02,052 INFO L226 Difference]: Without dead ends: 107 [2022-01-30 20:16:02,053 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 20:16:02,053 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 94 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 20:16:02,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 58 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 20:16:02,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-01-30 20:16:02,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2022-01-30 20:16:02,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 97 states have (on average 1.1855670103092784) internal successors, (115), 98 states have internal predecessors, (115), 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 20:16:02,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 126 transitions. [2022-01-30 20:16:02,058 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 126 transitions. Word has length 50 [2022-01-30 20:16:02,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 20:16:02,058 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 126 transitions. [2022-01-30 20:16:02,058 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 20:16:02,058 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 126 transitions. [2022-01-30 20:16:02,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-30 20:16:02,059 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 20:16:02,059 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 20:16:02,075 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 20:16:02,269 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 20:16:02,269 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 20:16:02,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 20:16:02,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1727596755, now seen corresponding path program 2 times [2022-01-30 20:16:02,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 20:16:02,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138687259] [2022-01-30 20:16:02,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:16:02,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 20:16:02,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:16:02,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 20:16:02,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:16:02,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-30 20:16:02,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:16:02,569 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 20:16:02,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 20:16:02,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138687259] [2022-01-30 20:16:02,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138687259] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 20:16:02,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243329373] [2022-01-30 20:16:02,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 20:16:02,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 20:16:02,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 20:16:02,570 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 20:16:02,571 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 20:16:02,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 20:16:02,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 20:16:02,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-30 20:16:02,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 20:16:02,777 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 20:16:02,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 20:16:03,394 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 20:16:03,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243329373] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 20:16:03,395 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 20:16:03,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-01-30 20:16:03,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486705717] [2022-01-30 20:16:03,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 20:16:03,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-30 20:16:03,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 20:16:03,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-30 20:16:03,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-30 20:16:03,397 INFO L87 Difference]: Start difference. First operand 107 states and 126 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 20:16:04,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 20:16:04,406 INFO L93 Difference]: Finished difference Result 211 states and 272 transitions. [2022-01-30 20:16:04,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-30 20:16:04,406 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 20:16:04,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 20:16:04,407 INFO L225 Difference]: With dead ends: 211 [2022-01-30 20:16:04,407 INFO L226 Difference]: Without dead ends: 155 [2022-01-30 20:16:04,410 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 20:16:04,410 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 131 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-30 20:16:04,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 73 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-30 20:16:04,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-01-30 20:16:04,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2022-01-30 20:16:04,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 145 states have (on average 1.1241379310344828) internal successors, (163), 146 states have internal predecessors, (163), 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 20:16:04,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 174 transitions. [2022-01-30 20:16:04,416 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 174 transitions. Word has length 74 [2022-01-30 20:16:04,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 20:16:04,416 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 174 transitions. [2022-01-30 20:16:04,416 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 20:16:04,416 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 174 transitions. [2022-01-30 20:16:04,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-01-30 20:16:04,417 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 20:16:04,417 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 20:16:04,433 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 20:16:04,623 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 20:16:04,624 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 20:16:04,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 20:16:04,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1993287677, now seen corresponding path program 3 times [2022-01-30 20:16:04,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 20:16:04,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510222439] [2022-01-30 20:16:04,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:16:04,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 20:16:04,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:16:05,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 20:16:05,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:16:05,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-30 20:16:05,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:16:05,487 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 20:16:05,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 20:16:05,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510222439] [2022-01-30 20:16:05,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510222439] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 20:16:05,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020007838] [2022-01-30 20:16:05,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-30 20:16:05,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 20:16:05,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 20:16:05,489 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 20:16:05,503 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 20:16:05,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-30 20:16:05,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 20:16:05,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-30 20:16:05,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 20:16:05,769 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 20:16:05,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 20:16:05,956 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 20:16:05,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020007838] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 20:16:05,957 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 20:16:05,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 5, 5] total 56 [2022-01-30 20:16:05,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492359814] [2022-01-30 20:16:05,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 20:16:05,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-30 20:16:05,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 20:16:05,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-30 20:16:05,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1197, Invalid=1883, Unknown=0, NotChecked=0, Total=3080 [2022-01-30 20:16:05,959 INFO L87 Difference]: Start difference. First operand 155 states and 174 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 20:16:07,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 20:16:07,452 INFO L93 Difference]: Finished difference Result 267 states and 336 transitions. [2022-01-30 20:16:07,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-30 20:16:07,453 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 20:16:07,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 20:16:07,455 INFO L225 Difference]: With dead ends: 267 [2022-01-30 20:16:07,455 INFO L226 Difference]: Without dead ends: 211 [2022-01-30 20:16:07,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1913 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3820, Invalid=8612, Unknown=0, NotChecked=0, Total=12432 [2022-01-30 20:16:07,457 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 305 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-30 20:16:07,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 70 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-30 20:16:07,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-01-30 20:16:07,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 187. [2022-01-30 20:16:07,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 175 states have (on average 1.1428571428571428) internal successors, (200), 177 states have internal predecessors, (200), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-30 20:16:07,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 215 transitions. [2022-01-30 20:16:07,464 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 215 transitions. Word has length 122 [2022-01-30 20:16:07,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 20:16:07,465 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 215 transitions. [2022-01-30 20:16:07,465 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 20:16:07,465 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 215 transitions. [2022-01-30 20:16:07,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-01-30 20:16:07,466 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 20:16:07,466 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 20:16:07,483 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-01-30 20:16:07,681 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 20:16:07,682 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 20:16:07,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 20:16:07,682 INFO L85 PathProgramCache]: Analyzing trace with hash 389812694, now seen corresponding path program 4 times [2022-01-30 20:16:07,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 20:16:07,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107807690] [2022-01-30 20:16:07,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:16:07,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 20:16:07,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:16:08,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 20:16:08,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:16:08,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-01-30 20:16:08,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:16:08,500 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 20:16:08,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 20:16:08,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107807690] [2022-01-30 20:16:08,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107807690] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 20:16:08,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094250431] [2022-01-30 20:16:08,501 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-30 20:16:08,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 20:16:08,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 20:16:08,502 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 20:16:08,503 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 20:16:08,628 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-30 20:16:08,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 20:16:08,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-30 20:16:08,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 20:16:08,900 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 20:16:08,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 20:16:11,063 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 20:16:11,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094250431] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 20:16:11,064 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 20:16:11,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 100 [2022-01-30 20:16:11,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27619232] [2022-01-30 20:16:11,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 20:16:11,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-01-30 20:16:11,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 20:16:11,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-01-30 20:16:11,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2022-01-30 20:16:11,087 INFO L87 Difference]: Start difference. First operand 187 states and 215 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 20:16:14,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 20:16:14,228 INFO L93 Difference]: Finished difference Result 371 states and 475 transitions. [2022-01-30 20:16:14,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-30 20:16:14,228 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 20:16:14,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 20:16:14,229 INFO L225 Difference]: With dead ends: 371 [2022-01-30 20:16:14,230 INFO L226 Difference]: Without dead ends: 285 [2022-01-30 20:16:14,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5970 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=14358, Invalid=23862, Unknown=0, NotChecked=0, Total=38220 [2022-01-30 20:16:14,236 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 231 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-30 20:16:14,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 73 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-30 20:16:14,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-01-30 20:16:14,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 285. [2022-01-30 20:16:14,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 273 states have (on average 1.0915750915750915) internal successors, (298), 275 states have internal predecessors, (298), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-30 20:16:14,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 313 transitions. [2022-01-30 20:16:14,244 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 313 transitions. Word has length 133 [2022-01-30 20:16:14,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 20:16:14,244 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 313 transitions. [2022-01-30 20:16:14,245 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 20:16:14,245 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 313 transitions. [2022-01-30 20:16:14,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-01-30 20:16:14,246 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 20:16:14,246 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 20:16:14,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-01-30 20:16:14,466 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 20:16:14,466 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 20:16:14,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 20:16:14,467 INFO L85 PathProgramCache]: Analyzing trace with hash -11549740, now seen corresponding path program 5 times [2022-01-30 20:16:14,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 20:16:14,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868623163] [2022-01-30 20:16:14,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:16:14,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 20:16:14,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:16:17,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 20:16:17,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:16:17,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 219 [2022-01-30 20:16:17,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:16:17,398 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 20:16:17,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 20:16:17,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868623163] [2022-01-30 20:16:17,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868623163] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 20:16:17,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252846526] [2022-01-30 20:16:17,398 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-30 20:16:17,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 20:16:17,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 20:16:17,399 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 20:16:17,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process