/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 01:35:45,540 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 01:35:45,541 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 01:35:45,577 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 01:35:45,618 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 01:35:45,618 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 01:35:45,619 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 01:35:45,619 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf [2022-01-10 01:35:45,635 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 01:35:45,635 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 01:35:45,635 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 01:35:45,635 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 01:35:45,636 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 01:35:45,636 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 01:35:45,636 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 01:35:45,636 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 01:35:45,636 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 01:35:45,637 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 01:35:45,637 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 01:35:45,637 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 01:35:45,637 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 01:35:45,637 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 01:35:45,637 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 01:35:45,637 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 01:35:45,638 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 01:35:45,638 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 01:35:45,638 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 01:35:45,638 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 01:35:45,638 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 01:35:45,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 01:35:45,638 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 01:35:45,638 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 01:35:45,639 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 01:35:45,639 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 01:35:45,639 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 01:35:45,639 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 01:35:45,639 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 01:35:45,639 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 01:35:45,639 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 01:35:45,812 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 01:35:45,831 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 01:35:45,833 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 01:35:45,834 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 01:35:45,834 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 01:35:45,835 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2022-01-10 01:35:45,899 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eef9fbdf6/fb3086e9dfb04a23a95fa0a7ce0ed87b/FLAG23700e73a [2022-01-10 01:35:46,199 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 01:35:46,200 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2022-01-10 01:35:46,217 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eef9fbdf6/fb3086e9dfb04a23a95fa0a7ce0ed87b/FLAG23700e73a [2022-01-10 01:35:46,616 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eef9fbdf6/fb3086e9dfb04a23a95fa0a7ce0ed87b [2022-01-10 01:35:46,625 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 01:35:46,626 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 01:35:46,628 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 01:35:46,628 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 01:35:46,631 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 01:35:46,631 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 01:35:46" (1/1) ... [2022-01-10 01:35:46,634 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@85ec575 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:35:46, skipping insertion in model container [2022-01-10 01:35:46,634 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 01:35:46" (1/1) ... [2022-01-10 01:35:46,651 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 01:35:46,673 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 01:35:46,820 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[4069,4082] [2022-01-10 01:35:46,835 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 01:35:46,846 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 01:35:46,866 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[4069,4082] [2022-01-10 01:35:46,873 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 01:35:46,885 INFO L208 MainTranslator]: Completed translation [2022-01-10 01:35:46,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:35:46 WrapperNode [2022-01-10 01:35:46,886 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 01:35:46,887 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 01:35:46,887 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 01:35:46,887 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 01:35:46,899 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:35:46" (1/1) ... [2022-01-10 01:35:46,905 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:35:46" (1/1) ... [2022-01-10 01:35:46,923 INFO L137 Inliner]: procedures = 22, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 271 [2022-01-10 01:35:46,924 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 01:35:46,924 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 01:35:46,924 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 01:35:46,924 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 01:35:46,930 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:35:46" (1/1) ... [2022-01-10 01:35:46,930 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:35:46" (1/1) ... [2022-01-10 01:35:46,933 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:35:46" (1/1) ... [2022-01-10 01:35:46,933 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:35:46" (1/1) ... [2022-01-10 01:35:46,942 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:35:46" (1/1) ... [2022-01-10 01:35:46,944 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:35:46" (1/1) ... [2022-01-10 01:35:46,945 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:35:46" (1/1) ... [2022-01-10 01:35:46,947 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 01:35:46,947 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 01:35:46,948 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 01:35:46,948 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 01:35:46,948 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:35:46" (1/1) ... [2022-01-10 01:35:46,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 01:35:46,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:35:46,973 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) [2022-01-10 01:35:46,980 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 [2022-01-10 01:35:47,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 01:35:47,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-10 01:35:47,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 01:35:47,001 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 01:35:47,067 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 01:35:47,068 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 01:35:47,328 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 01:35:47,333 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 01:35:47,333 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 01:35:47,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 01:35:47 BoogieIcfgContainer [2022-01-10 01:35:47,335 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 01:35:47,342 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 01:35:47,343 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 01:35:47,345 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 01:35:47,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 01:35:46" (1/3) ... [2022-01-10 01:35:47,348 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71c73bcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 01:35:47, skipping insertion in model container [2022-01-10 01:35:47,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:35:46" (2/3) ... [2022-01-10 01:35:47,348 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71c73bcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 01:35:47, skipping insertion in model container [2022-01-10 01:35:47,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 01:35:47" (3/3) ... [2022-01-10 01:35:47,349 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2022-01-10 01:35:47,353 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 01:35:47,353 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 01:35:47,385 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 01:35:47,390 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 [2022-01-10 01:35:47,390 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 01:35:47,400 INFO L276 IsEmpty]: Start isEmpty. Operand has 62 states, 60 states have (on average 1.7166666666666666) internal successors, (103), 61 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:35:47,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-10 01:35:47,405 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:35:47,405 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:35:47,406 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:35:47,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:35:47,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1007825277, now seen corresponding path program 1 times [2022-01-10 01:35:47,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:35:47,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890709913] [2022-01-10 01:35:47,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:35:47,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:35:47,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:35:47,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:35:47,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:35:47,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890709913] [2022-01-10 01:35:47,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890709913] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:35:47,661 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:35:47,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 01:35:47,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82413144] [2022-01-10 01:35:47,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:35:47,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 01:35:47,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:35:47,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 01:35:47,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 01:35:47,692 INFO L87 Difference]: Start difference. First operand has 62 states, 60 states have (on average 1.7166666666666666) internal successors, (103), 61 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:35:47,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:35:47,767 INFO L93 Difference]: Finished difference Result 140 states and 224 transitions. [2022-01-10 01:35:47,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 01:35:47,771 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-01-10 01:35:47,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:35:47,782 INFO L225 Difference]: With dead ends: 140 [2022-01-10 01:35:47,782 INFO L226 Difference]: Without dead ends: 91 [2022-01-10 01:35:47,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 01:35:47,788 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 68 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:35:47,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 215 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:35:47,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-01-10 01:35:47,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2022-01-10 01:35:47,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.4772727272727273) internal successors, (130), 88 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:35:47,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 130 transitions. [2022-01-10 01:35:47,836 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 130 transitions. Word has length 36 [2022-01-10 01:35:47,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:35:47,836 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 130 transitions. [2022-01-10 01:35:47,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:35:47,838 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 130 transitions. [2022-01-10 01:35:47,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-10 01:35:47,839 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:35:47,839 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:35:47,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 01:35:47,840 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:35:47,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:35:47,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1176817218, now seen corresponding path program 1 times [2022-01-10 01:35:47,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:35:47,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21369150] [2022-01-10 01:35:47,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:35:47,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:35:47,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:35:47,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:35:47,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:35:47,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21369150] [2022-01-10 01:35:47,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21369150] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:35:47,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:35:47,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 01:35:47,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904467030] [2022-01-10 01:35:47,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:35:47,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 01:35:47,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:35:47,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 01:35:47,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 01:35:47,918 INFO L87 Difference]: Start difference. First operand 89 states and 130 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:35:47,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:35:47,954 INFO L93 Difference]: Finished difference Result 213 states and 326 transitions. [2022-01-10 01:35:47,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 01:35:47,957 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-01-10 01:35:47,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:35:47,961 INFO L225 Difference]: With dead ends: 213 [2022-01-10 01:35:47,961 INFO L226 Difference]: Without dead ends: 143 [2022-01-10 01:35:47,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 01:35:47,964 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 48 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:35:47,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 182 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:35:47,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-01-10 01:35:47,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2022-01-10 01:35:47,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.5142857142857142) internal successors, (212), 140 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:35:47,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 212 transitions. [2022-01-10 01:35:47,984 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 212 transitions. Word has length 37 [2022-01-10 01:35:47,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:35:47,984 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 212 transitions. [2022-01-10 01:35:47,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:35:47,985 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 212 transitions. [2022-01-10 01:35:47,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-10 01:35:47,986 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:35:47,987 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:35:47,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 01:35:47,987 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:35:47,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:35:47,988 INFO L85 PathProgramCache]: Analyzing trace with hash 761408425, now seen corresponding path program 1 times [2022-01-10 01:35:47,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:35:47,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39339864] [2022-01-10 01:35:47,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:35:47,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:35:48,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:35:48,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:35:48,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:35:48,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39339864] [2022-01-10 01:35:48,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39339864] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:35:48,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:35:48,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 01:35:48,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581820809] [2022-01-10 01:35:48,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:35:48,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 01:35:48,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:35:48,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 01:35:48,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 01:35:48,065 INFO L87 Difference]: Start difference. First operand 141 states and 212 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:35:48,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:35:48,106 INFO L93 Difference]: Finished difference Result 353 states and 546 transitions. [2022-01-10 01:35:48,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 01:35:48,109 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-10 01:35:48,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:35:48,110 INFO L225 Difference]: With dead ends: 353 [2022-01-10 01:35:48,110 INFO L226 Difference]: Without dead ends: 231 [2022-01-10 01:35:48,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 01:35:48,112 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 43 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:35:48,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 178 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:35:48,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-01-10 01:35:48,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 229. [2022-01-10 01:35:48,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.5263157894736843) internal successors, (348), 228 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:35:48,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 348 transitions. [2022-01-10 01:35:48,133 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 348 transitions. Word has length 38 [2022-01-10 01:35:48,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:35:48,134 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 348 transitions. [2022-01-10 01:35:48,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:35:48,134 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 348 transitions. [2022-01-10 01:35:48,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-10 01:35:48,135 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:35:48,135 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:35:48,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 01:35:48,135 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:35:48,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:35:48,136 INFO L85 PathProgramCache]: Analyzing trace with hash 2014631486, now seen corresponding path program 1 times [2022-01-10 01:35:48,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:35:48,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748558514] [2022-01-10 01:35:48,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:35:48,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:35:48,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:35:48,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:35:48,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:35:48,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748558514] [2022-01-10 01:35:48,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748558514] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:35:48,224 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:35:48,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 01:35:48,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324765145] [2022-01-10 01:35:48,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:35:48,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 01:35:48,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:35:48,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 01:35:48,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 01:35:48,226 INFO L87 Difference]: Start difference. First operand 229 states and 348 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:35:48,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:35:48,403 INFO L93 Difference]: Finished difference Result 1489 states and 2322 transitions. [2022-01-10 01:35:48,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 01:35:48,403 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-10 01:35:48,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:35:48,407 INFO L225 Difference]: With dead ends: 1489 [2022-01-10 01:35:48,407 INFO L226 Difference]: Without dead ends: 1279 [2022-01-10 01:35:48,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-10 01:35:48,417 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 423 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 01:35:48,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [423 Valid, 419 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 01:35:48,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2022-01-10 01:35:48,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 437. [2022-01-10 01:35:48,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 436 states have (on average 1.5137614678899083) internal successors, (660), 436 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:35:48,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 660 transitions. [2022-01-10 01:35:48,469 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 660 transitions. Word has length 39 [2022-01-10 01:35:48,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:35:48,469 INFO L470 AbstractCegarLoop]: Abstraction has 437 states and 660 transitions. [2022-01-10 01:35:48,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:35:48,470 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 660 transitions. [2022-01-10 01:35:48,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-10 01:35:48,470 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:35:48,470 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:35:48,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 01:35:48,471 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:35:48,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:35:48,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1891215654, now seen corresponding path program 1 times [2022-01-10 01:35:48,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:35:48,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536844684] [2022-01-10 01:35:48,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:35:48,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:35:48,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:35:48,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:35:48,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:35:48,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536844684] [2022-01-10 01:35:48,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536844684] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:35:48,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:35:48,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 01:35:48,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189891366] [2022-01-10 01:35:48,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:35:48,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 01:35:48,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:35:48,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 01:35:48,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 01:35:48,526 INFO L87 Difference]: Start difference. First operand 437 states and 660 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:35:48,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:35:48,577 INFO L93 Difference]: Finished difference Result 1055 states and 1604 transitions. [2022-01-10 01:35:48,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 01:35:48,577 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-01-10 01:35:48,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:35:48,580 INFO L225 Difference]: With dead ends: 1055 [2022-01-10 01:35:48,581 INFO L226 Difference]: Without dead ends: 637 [2022-01-10 01:35:48,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 01:35:48,582 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 34 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:35:48,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 154 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:35:48,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2022-01-10 01:35:48,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 635. [2022-01-10 01:35:48,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 634 states have (on average 1.498422712933754) internal successors, (950), 634 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:35:48,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 950 transitions. [2022-01-10 01:35:48,622 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 950 transitions. Word has length 41 [2022-01-10 01:35:48,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:35:48,622 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 950 transitions. [2022-01-10 01:35:48,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:35:48,622 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 950 transitions. [2022-01-10 01:35:48,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-10 01:35:48,623 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:35:48,623 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:35:48,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-10 01:35:48,624 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:35:48,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:35:48,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1870212999, now seen corresponding path program 1 times [2022-01-10 01:35:48,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:35:48,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801774281] [2022-01-10 01:35:48,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:35:48,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:35:48,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:35:48,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:35:48,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:35:48,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801774281] [2022-01-10 01:35:48,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801774281] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:35:48,735 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:35:48,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 01:35:48,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590234387] [2022-01-10 01:35:48,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:35:48,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 01:35:48,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:35:48,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 01:35:48,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 01:35:48,737 INFO L87 Difference]: Start difference. First operand 635 states and 950 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:35:48,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:35:48,818 INFO L93 Difference]: Finished difference Result 1251 states and 1880 transitions. [2022-01-10 01:35:48,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 01:35:48,818 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-01-10 01:35:48,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:35:48,820 INFO L225 Difference]: With dead ends: 1251 [2022-01-10 01:35:48,821 INFO L226 Difference]: Without dead ends: 637 [2022-01-10 01:35:48,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 01:35:48,823 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 171 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:35:48,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 195 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:35:48,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2022-01-10 01:35:48,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 635. [2022-01-10 01:35:48,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 634 states have (on average 1.4794952681388012) internal successors, (938), 634 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:35:48,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 938 transitions. [2022-01-10 01:35:48,878 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 938 transitions. Word has length 41 [2022-01-10 01:35:48,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:35:48,879 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 938 transitions. [2022-01-10 01:35:48,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:35:48,880 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 938 transitions. [2022-01-10 01:35:48,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-10 01:35:48,881 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:35:48,881 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:35:48,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-10 01:35:48,881 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:35:48,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:35:48,882 INFO L85 PathProgramCache]: Analyzing trace with hash -2143937547, now seen corresponding path program 1 times [2022-01-10 01:35:48,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:35:48,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121393725] [2022-01-10 01:35:48,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:35:48,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:35:48,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:35:48,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:35:48,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:35:48,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121393725] [2022-01-10 01:35:48,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121393725] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:35:48,951 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:35:48,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 01:35:48,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946777101] [2022-01-10 01:35:48,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:35:48,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 01:35:48,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:35:48,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 01:35:48,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 01:35:48,953 INFO L87 Difference]: Start difference. First operand 635 states and 938 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:35:49,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:35:49,049 INFO L93 Difference]: Finished difference Result 1249 states and 1855 transitions. [2022-01-10 01:35:49,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 01:35:49,050 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-10 01:35:49,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:35:49,052 INFO L225 Difference]: With dead ends: 1249 [2022-01-10 01:35:49,052 INFO L226 Difference]: Without dead ends: 635 [2022-01-10 01:35:49,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 01:35:49,054 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 198 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:35:49,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 61 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:35:49,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2022-01-10 01:35:49,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2022-01-10 01:35:49,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 634 states have (on average 1.4605678233438486) internal successors, (926), 634 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:35:49,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 926 transitions. [2022-01-10 01:35:49,105 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 926 transitions. Word has length 42 [2022-01-10 01:35:49,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:35:49,106 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 926 transitions. [2022-01-10 01:35:49,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:35:49,106 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 926 transitions. [2022-01-10 01:35:49,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-10 01:35:49,109 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:35:49,109 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:35:49,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-10 01:35:49,109 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:35:49,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:35:49,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1278405158, now seen corresponding path program 1 times [2022-01-10 01:35:49,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:35:49,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920171545] [2022-01-10 01:35:49,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:35:49,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:35:49,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:35:49,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:35:49,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:35:49,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920171545] [2022-01-10 01:35:49,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920171545] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:35:49,183 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:35:49,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 01:35:49,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804075291] [2022-01-10 01:35:49,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:35:49,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 01:35:49,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:35:49,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 01:35:49,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 01:35:49,185 INFO L87 Difference]: Start difference. First operand 635 states and 926 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:35:49,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:35:49,326 INFO L93 Difference]: Finished difference Result 1143 states and 1658 transitions. [2022-01-10 01:35:49,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 01:35:49,327 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-10 01:35:49,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:35:49,331 INFO L225 Difference]: With dead ends: 1143 [2022-01-10 01:35:49,331 INFO L226 Difference]: Without dead ends: 1141 [2022-01-10 01:35:49,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 01:35:49,332 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 108 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:35:49,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 361 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:35:49,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1141 states. [2022-01-10 01:35:49,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1141 to 667. [2022-01-10 01:35:49,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 666 states have (on average 1.4324324324324325) internal successors, (954), 666 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:35:49,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 954 transitions. [2022-01-10 01:35:49,393 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 954 transitions. Word has length 42 [2022-01-10 01:35:49,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:35:49,394 INFO L470 AbstractCegarLoop]: Abstraction has 667 states and 954 transitions. [2022-01-10 01:35:49,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:35:49,394 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 954 transitions. [2022-01-10 01:35:49,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-10 01:35:49,397 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:35:49,397 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:35:49,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-10 01:35:49,397 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:35:49,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:35:49,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1616122195, now seen corresponding path program 1 times [2022-01-10 01:35:49,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:35:49,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599214125] [2022-01-10 01:35:49,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:35:49,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:35:49,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:35:49,466 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 01:35:49,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:35:49,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599214125] [2022-01-10 01:35:49,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599214125] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:35:49,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:35:49,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 01:35:49,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176721468] [2022-01-10 01:35:49,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:35:49,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 01:35:49,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:35:49,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 01:35:49,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-10 01:35:49,468 INFO L87 Difference]: Start difference. First operand 667 states and 954 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:35:49,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:35:49,690 INFO L93 Difference]: Finished difference Result 2735 states and 3928 transitions. [2022-01-10 01:35:49,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 01:35:49,691 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-01-10 01:35:49,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:35:49,697 INFO L225 Difference]: With dead ends: 2735 [2022-01-10 01:35:49,697 INFO L226 Difference]: Without dead ends: 2089 [2022-01-10 01:35:49,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 01:35:49,700 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 214 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:35:49,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 325 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:35:49,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2022-01-10 01:35:49,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 1311. [2022-01-10 01:35:49,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1311 states, 1310 states have (on average 1.4305343511450381) internal successors, (1874), 1310 states have internal predecessors, (1874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:35:49,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1311 states to 1311 states and 1874 transitions. [2022-01-10 01:35:49,839 INFO L78 Accepts]: Start accepts. Automaton has 1311 states and 1874 transitions. Word has length 60 [2022-01-10 01:35:49,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:35:49,839 INFO L470 AbstractCegarLoop]: Abstraction has 1311 states and 1874 transitions. [2022-01-10 01:35:49,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:35:49,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1311 states and 1874 transitions. [2022-01-10 01:35:49,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-10 01:35:49,840 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:35:49,840 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:35:49,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-10 01:35:49,840 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:35:49,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:35:49,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1524898995, now seen corresponding path program 1 times [2022-01-10 01:35:49,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:35:49,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787864541] [2022-01-10 01:35:49,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:35:49,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:35:49,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:35:49,898 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 01:35:49,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:35:49,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787864541] [2022-01-10 01:35:49,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787864541] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:35:49,899 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:35:49,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 01:35:49,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361955754] [2022-01-10 01:35:49,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:35:49,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 01:35:49,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:35:49,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 01:35:49,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-10 01:35:49,901 INFO L87 Difference]: Start difference. First operand 1311 states and 1874 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:35:50,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:35:50,156 INFO L93 Difference]: Finished difference Result 3379 states and 4848 transitions. [2022-01-10 01:35:50,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 01:35:50,157 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-01-10 01:35:50,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:35:50,165 INFO L225 Difference]: With dead ends: 3379 [2022-01-10 01:35:50,165 INFO L226 Difference]: Without dead ends: 2733 [2022-01-10 01:35:50,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 01:35:50,169 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 209 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:35:50,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 355 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:35:50,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2733 states. [2022-01-10 01:35:50,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2733 to 2279. [2022-01-10 01:35:50,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2279 states, 2278 states have (on average 1.4240561896400352) internal successors, (3244), 2278 states have internal predecessors, (3244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:35:50,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2279 states to 2279 states and 3244 transitions. [2022-01-10 01:35:50,358 INFO L78 Accepts]: Start accepts. Automaton has 2279 states and 3244 transitions. Word has length 60 [2022-01-10 01:35:50,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:35:50,358 INFO L470 AbstractCegarLoop]: Abstraction has 2279 states and 3244 transitions. [2022-01-10 01:35:50,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:35:50,358 INFO L276 IsEmpty]: Start isEmpty. Operand 2279 states and 3244 transitions. [2022-01-10 01:35:50,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-10 01:35:50,359 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:35:50,359 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:35:50,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-10 01:35:50,360 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:35:50,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:35:50,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1912167623, now seen corresponding path program 1 times [2022-01-10 01:35:50,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:35:50,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087175110] [2022-01-10 01:35:50,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:35:50,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:35:50,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:35:50,405 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 01:35:50,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:35:50,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087175110] [2022-01-10 01:35:50,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087175110] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:35:50,406 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:35:50,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 01:35:50,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716836916] [2022-01-10 01:35:50,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:35:50,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 01:35:50,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:35:50,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 01:35:50,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-10 01:35:50,408 INFO L87 Difference]: Start difference. First operand 2279 states and 3244 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:35:50,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:35:50,660 INFO L93 Difference]: Finished difference Result 3631 states and 5216 transitions. [2022-01-10 01:35:50,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 01:35:50,661 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-01-10 01:35:50,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:35:50,670 INFO L225 Difference]: With dead ends: 3631 [2022-01-10 01:35:50,670 INFO L226 Difference]: Without dead ends: 3181 [2022-01-10 01:35:50,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 01:35:50,672 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 206 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:35:50,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 338 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:35:50,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3181 states. [2022-01-10 01:35:50,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3181 to 2727. [2022-01-10 01:35:50,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2727 states, 2726 states have (on average 1.4277329420396185) internal successors, (3892), 2726 states have internal predecessors, (3892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:35:50,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2727 states to 2727 states and 3892 transitions. [2022-01-10 01:35:50,903 INFO L78 Accepts]: Start accepts. Automaton has 2727 states and 3892 transitions. Word has length 60 [2022-01-10 01:35:50,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:35:50,903 INFO L470 AbstractCegarLoop]: Abstraction has 2727 states and 3892 transitions. [2022-01-10 01:35:50,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:35:50,903 INFO L276 IsEmpty]: Start isEmpty. Operand 2727 states and 3892 transitions. [2022-01-10 01:35:50,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-10 01:35:50,904 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:35:50,904 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:35:50,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-10 01:35:50,904 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:35:50,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:35:50,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1791952020, now seen corresponding path program 1 times [2022-01-10 01:35:50,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:35:50,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50122404] [2022-01-10 01:35:50,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:35:50,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:35:50,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:35:50,957 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 01:35:50,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:35:50,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50122404] [2022-01-10 01:35:50,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50122404] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 01:35:50,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658626204] [2022-01-10 01:35:50,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:35:50,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:35:50,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:35:50,960 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) [2022-01-10 01:35:50,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-10 01:35:51,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:35:51,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-10 01:35:51,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 01:35:51,293 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:35:51,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 01:35:51,642 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:35:51,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658626204] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 01:35:51,642 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 01:35:51,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 12 [2022-01-10 01:35:51,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347987152] [2022-01-10 01:35:51,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 01:35:51,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 01:35:51,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:35:51,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 01:35:51,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-01-10 01:35:51,644 INFO L87 Difference]: Start difference. First operand 2727 states and 3892 transitions. Second operand has 12 states, 12 states have (on average 14.166666666666666) internal successors, (170), 12 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:35:52,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:35:52,509 INFO L93 Difference]: Finished difference Result 10001 states and 14436 transitions. [2022-01-10 01:35:52,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 01:35:52,510 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 14.166666666666666) internal successors, (170), 12 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-01-10 01:35:52,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:35:52,531 INFO L225 Difference]: With dead ends: 10001 [2022-01-10 01:35:52,531 INFO L226 Difference]: Without dead ends: 7903 [2022-01-10 01:35:52,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 112 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-01-10 01:35:52,535 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 660 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 660 SdHoareTripleChecker+Valid, 837 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 01:35:52,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [660 Valid, 837 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 01:35:52,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7903 states. [2022-01-10 01:35:53,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7903 to 7875. [2022-01-10 01:35:53,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7875 states, 7874 states have (on average 1.4109728219456439) internal successors, (11110), 7874 states have internal predecessors, (11110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:35:53,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7875 states to 7875 states and 11110 transitions. [2022-01-10 01:35:53,281 INFO L78 Accepts]: Start accepts. Automaton has 7875 states and 11110 transitions. Word has length 61 [2022-01-10 01:35:53,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:35:53,282 INFO L470 AbstractCegarLoop]: Abstraction has 7875 states and 11110 transitions. [2022-01-10 01:35:53,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 14.166666666666666) internal successors, (170), 12 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:35:53,282 INFO L276 IsEmpty]: Start isEmpty. Operand 7875 states and 11110 transitions. [2022-01-10 01:35:53,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-10 01:35:53,283 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:35:53,283 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:35:53,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-10 01:35:53,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-10 01:35:53,501 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:35:53,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:35:53,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1709414990, now seen corresponding path program 1 times [2022-01-10 01:35:53,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:35:53,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861439356] [2022-01-10 01:35:53,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:35:53,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:35:53,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:35:53,628 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:35:53,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:35:53,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861439356] [2022-01-10 01:35:53,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861439356] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 01:35:53,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219640291] [2022-01-10 01:35:53,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:35:53,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:35:53,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:35:53,630 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) [2022-01-10 01:35:53,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-10 01:35:53,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:35:53,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 01:35:53,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 01:35:54,401 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:35:54,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 01:35:54,856 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:35:54,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219640291] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 01:35:54,856 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 01:35:54,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2022-01-10 01:35:54,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519734137] [2022-01-10 01:35:54,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 01:35:54,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-10 01:35:54,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:35:54,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-10 01:35:54,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-01-10 01:35:54,857 INFO L87 Difference]: Start difference. First operand 7875 states and 11110 transitions. Second operand has 25 states, 25 states have (on average 6.28) internal successors, (157), 24 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:36:32,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:36:32,442 INFO L93 Difference]: Finished difference Result 166466 states and 226447 transitions. [2022-01-10 01:36:32,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 339 states. [2022-01-10 01:36:32,442 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 6.28) internal successors, (157), 24 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-01-10 01:36:32,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:36:32,816 INFO L225 Difference]: With dead ends: 166466 [2022-01-10 01:36:32,816 INFO L226 Difference]: Without dead ends: 158612 [2022-01-10 01:36:32,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 360 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58389 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=14199, Invalid=116483, Unknown=0, NotChecked=0, Total=130682 [2022-01-10 01:36:32,885 INFO L933 BasicCegarLoop]: 220 mSDtfsCounter, 10145 mSDsluCounter, 2018 mSDsCounter, 0 mSdLazyCounter, 2493 mSolverCounterSat, 746 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10145 SdHoareTripleChecker+Valid, 2238 SdHoareTripleChecker+Invalid, 3239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 746 IncrementalHoareTripleChecker+Valid, 2493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-10 01:36:32,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10145 Valid, 2238 Invalid, 3239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [746 Valid, 2493 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-10 01:36:33,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158612 states. [2022-01-10 01:36:40,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158612 to 38937. [2022-01-10 01:36:40,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38937 states, 38936 states have (on average 1.370299979453462) internal successors, (53354), 38936 states have internal predecessors, (53354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:36:40,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38937 states to 38937 states and 53354 transitions. [2022-01-10 01:36:40,293 INFO L78 Accepts]: Start accepts. Automaton has 38937 states and 53354 transitions. Word has length 62 [2022-01-10 01:36:40,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:36:40,293 INFO L470 AbstractCegarLoop]: Abstraction has 38937 states and 53354 transitions. [2022-01-10 01:36:40,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.28) internal successors, (157), 24 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:36:40,293 INFO L276 IsEmpty]: Start isEmpty. Operand 38937 states and 53354 transitions. [2022-01-10 01:36:40,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-10 01:36:40,295 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:36:40,295 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:36:40,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-10 01:36:40,511 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,SelfDestructingSolverStorable12 [2022-01-10 01:36:40,511 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:36:40,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:36:40,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1807663409, now seen corresponding path program 1 times [2022-01-10 01:36:40,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:36:40,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808606062] [2022-01-10 01:36:40,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:36:40,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:36:40,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:36:40,695 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:36:40,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:36:40,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808606062] [2022-01-10 01:36:40,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808606062] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 01:36:40,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000349641] [2022-01-10 01:36:40,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:36:40,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:36:40,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:36:40,697 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) [2022-01-10 01:36:40,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-10 01:36:40,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:36:40,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-10 01:36:40,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 01:36:41,356 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:36:41,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 01:36:41,840 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:36:41,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000349641] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 01:36:41,841 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 01:36:41,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-10 01:36:41,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858654189] [2022-01-10 01:36:41,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 01:36:41,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-10 01:36:41,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:36:41,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-10 01:36:41,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-10 01:36:41,842 INFO L87 Difference]: Start difference. First operand 38937 states and 53354 transitions. Second operand has 21 states, 21 states have (on average 6.904761904761905) internal successors, (145), 20 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)