/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 06:23:22,772 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 06:23:22,774 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 06:23:22,796 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-02 06:23:22,804 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 06:23:22,804 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 06:23:22,805 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 06:23:22,806 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 06:23:22,807 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 06:23:22,808 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 06:23:22,809 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 06:23:22,810 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 06:23:22,812 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 06:23:22,813 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 06:23:22,814 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 06:23:22,814 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 06:23:22,818 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 06:23:22,825 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 06:23:22,825 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 06:23:22,826 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 06:23:22,827 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-02 06:23:22,847 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 06:23:22,848 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 06:23:22,848 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 06:23:22,848 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 06:23:22,849 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 06:23:22,849 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 06:23:22,849 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 06:23:22,849 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 06:23:22,850 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 06:23:22,850 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 06:23:22,850 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 06:23:22,850 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 06:23:22,850 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 06:23:22,850 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 06:23:22,851 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 06:23:22,851 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 06:23:22,851 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 06:23:22,851 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 06:23:22,851 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 06:23:22,851 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 06:23:22,851 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 06:23:22,852 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 06:23:22,852 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 06:23:22,852 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 06:23:22,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 06:23:22,852 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 06:23:22,852 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 06:23:22,852 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 06:23:22,853 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 06:23:22,853 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 06:23:22,853 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 06:23:22,853 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 06:23:22,853 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 06:23:22,853 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 06:23:22,853 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 06:23:22,853 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 06:23:23,032 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 06:23:23,050 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 06:23:23,052 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 06:23:23,053 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 06:23:23,053 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 06:23:23,054 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-04-02 06:23:24,259 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 06:23:24,471 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 06:23:24,472 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-04-02 06:23:24,479 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3aead1a5/7548f8a9cab945129f1cf9b78d6d40b2/FLAG6429fdb08 [2023-04-02 06:23:24,494 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3aead1a5/7548f8a9cab945129f1cf9b78d6d40b2 [2023-04-02 06:23:24,497 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 06:23:24,499 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 06:23:24,500 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 06:23:24,501 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 06:23:24,503 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 06:23:24,504 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 06:23:24" (1/1) ... [2023-04-02 06:23:24,505 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1802b796 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:23:24, skipping insertion in model container [2023-04-02 06:23:24,505 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 06:23:24" (1/1) ... [2023-04-02 06:23:24,511 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 06:23:24,545 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 06:23:24,704 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[6876,6889] [2023-04-02 06:23:24,717 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[9071,9084] [2023-04-02 06:23:24,725 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 06:23:24,738 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 06:23:24,797 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[6876,6889] [2023-04-02 06:23:24,806 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[9071,9084] [2023-04-02 06:23:24,812 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 06:23:24,828 INFO L208 MainTranslator]: Completed translation [2023-04-02 06:23:24,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:23:24 WrapperNode [2023-04-02 06:23:24,829 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 06:23:24,829 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 06:23:24,829 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 06:23:24,830 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 06:23:24,840 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:23:24" (1/1) ... [2023-04-02 06:23:24,840 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:23:24" (1/1) ... [2023-04-02 06:23:24,856 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:23:24" (1/1) ... [2023-04-02 06:23:24,857 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:23:24" (1/1) ... [2023-04-02 06:23:24,869 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:23:24" (1/1) ... [2023-04-02 06:23:24,874 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:23:24" (1/1) ... [2023-04-02 06:23:24,877 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:23:24" (1/1) ... [2023-04-02 06:23:24,879 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:23:24" (1/1) ... [2023-04-02 06:23:24,882 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 06:23:24,883 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 06:23:24,883 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 06:23:24,883 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 06:23:24,890 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:23:24" (1/1) ... [2023-04-02 06:23:24,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 06:23:24,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 06:23:24,925 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) [2023-04-02 06:23:24,941 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 [2023-04-02 06:23:24,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 06:23:24,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 06:23:24,968 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 06:23:24,968 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 06:23:24,968 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 06:23:24,968 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 06:23:24,968 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 06:23:24,968 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 06:23:24,968 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 06:23:24,968 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-02 06:23:24,968 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-02 06:23:24,969 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-02 06:23:24,969 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-02 06:23:24,969 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 06:23:24,969 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-02 06:23:24,970 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-02 06:23:24,970 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-02 06:23:24,970 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-02 06:23:24,970 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-02 06:23:24,970 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-02 06:23:24,970 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-02 06:23:24,970 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 06:23:24,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 06:23:24,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 06:23:24,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 06:23:24,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 06:23:24,971 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 06:23:24,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 06:23:25,081 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 06:23:25,082 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 06:23:25,571 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 06:23:25,577 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 06:23:25,577 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-02 06:23:25,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 06:23:25 BoogieIcfgContainer [2023-04-02 06:23:25,579 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 06:23:25,581 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 06:23:25,581 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 06:23:25,584 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 06:23:25,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 06:23:24" (1/3) ... [2023-04-02 06:23:25,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@291f52bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 06:23:25, skipping insertion in model container [2023-04-02 06:23:25,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:23:24" (2/3) ... [2023-04-02 06:23:25,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@291f52bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 06:23:25, skipping insertion in model container [2023-04-02 06:23:25,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 06:23:25" (3/3) ... [2023-04-02 06:23:25,598 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-04-02 06:23:25,618 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 06:23:25,618 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-04-02 06:23:25,660 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 06:23:25,666 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@72dafad3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 06:23:25,667 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-04-02 06:23:25,673 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 104 states have (on average 1.7403846153846154) internal successors, (181), 107 states have internal predecessors, (181), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 06:23:25,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-02 06:23:25,681 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:23:25,681 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:23:25,681 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:23:25,687 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:23:25,687 INFO L85 PathProgramCache]: Analyzing trace with hash 128383548, now seen corresponding path program 1 times [2023-04-02 06:23:25,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:23:25,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515959970] [2023-04-02 06:23:25,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:23:25,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:23:25,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:23:26,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:23:26,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:23:26,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:23:26,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:23:26,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515959970] [2023-04-02 06:23:26,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515959970] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:23:26,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:23:26,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 06:23:26,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999519689] [2023-04-02 06:23:26,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:23:26,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:23:26,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:23:26,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:23:26,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:23:26,363 INFO L87 Difference]: Start difference. First operand has 112 states, 104 states have (on average 1.7403846153846154) internal successors, (181), 107 states have internal predecessors, (181), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:23:27,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:23:27,230 INFO L93 Difference]: Finished difference Result 440 states and 679 transitions. [2023-04-02 06:23:27,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 06:23:27,232 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2023-04-02 06:23:27,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:23:27,245 INFO L225 Difference]: With dead ends: 440 [2023-04-02 06:23:27,246 INFO L226 Difference]: Without dead ends: 356 [2023-04-02 06:23:27,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-04-02 06:23:27,257 INFO L413 NwaCegarLoop]: 305 mSDtfsCounter, 610 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 610 SdHoareTripleChecker+Valid, 947 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 06:23:27,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [610 Valid, 947 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 06:23:27,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2023-04-02 06:23:27,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 158. [2023-04-02 06:23:27,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 153 states have (on average 1.4248366013071896) internal successors, (218), 154 states have internal predecessors, (218), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:23:27,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 221 transitions. [2023-04-02 06:23:27,315 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 221 transitions. Word has length 51 [2023-04-02 06:23:27,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:23:27,315 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 221 transitions. [2023-04-02 06:23:27,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:23:27,316 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 221 transitions. [2023-04-02 06:23:27,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-04-02 06:23:27,317 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:23:27,317 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:23:27,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 06:23:27,318 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:23:27,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:23:27,319 INFO L85 PathProgramCache]: Analyzing trace with hash -486068417, now seen corresponding path program 1 times [2023-04-02 06:23:27,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:23:27,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982729787] [2023-04-02 06:23:27,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:23:27,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:23:27,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:23:27,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:23:27,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:23:27,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:23:27,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:23:27,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982729787] [2023-04-02 06:23:27,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982729787] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:23:27,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:23:27,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 06:23:27,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497749769] [2023-04-02 06:23:27,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:23:27,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:23:27,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:23:27,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:23:27,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:23:27,700 INFO L87 Difference]: Start difference. First operand 158 states and 221 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:23:28,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:23:28,183 INFO L93 Difference]: Finished difference Result 247 states and 353 transitions. [2023-04-02 06:23:28,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:23:28,185 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2023-04-02 06:23:28,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:23:28,191 INFO L225 Difference]: With dead ends: 247 [2023-04-02 06:23:28,195 INFO L226 Difference]: Without dead ends: 162 [2023-04-02 06:23:28,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-04-02 06:23:28,197 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 246 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:23:28,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 356 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:23:28,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-04-02 06:23:28,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 160. [2023-04-02 06:23:28,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.4129032258064516) internal successors, (219), 156 states have internal predecessors, (219), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:23:28,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 222 transitions. [2023-04-02 06:23:28,233 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 222 transitions. Word has length 52 [2023-04-02 06:23:28,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:23:28,234 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 222 transitions. [2023-04-02 06:23:28,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:23:28,234 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 222 transitions. [2023-04-02 06:23:28,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-02 06:23:28,237 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:23:28,237 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:23:28,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 06:23:28,238 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:23:28,238 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:23:28,238 INFO L85 PathProgramCache]: Analyzing trace with hash -364883093, now seen corresponding path program 1 times [2023-04-02 06:23:28,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:23:28,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274612915] [2023-04-02 06:23:28,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:23:28,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:23:28,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:23:28,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:23:28,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:23:28,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:23:28,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:23:28,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274612915] [2023-04-02 06:23:28,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274612915] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:23:28,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:23:28,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 06:23:28,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256303757] [2023-04-02 06:23:28,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:23:28,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:23:28,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:23:28,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:23:28,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:23:28,459 INFO L87 Difference]: Start difference. First operand 160 states and 222 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 5 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:23:28,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:23:28,994 INFO L93 Difference]: Finished difference Result 473 states and 689 transitions. [2023-04-02 06:23:28,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:23:28,994 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 5 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2023-04-02 06:23:28,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:23:28,996 INFO L225 Difference]: With dead ends: 473 [2023-04-02 06:23:28,997 INFO L226 Difference]: Without dead ends: 391 [2023-04-02 06:23:28,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-04-02 06:23:28,998 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 298 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:23:28,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 606 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:23:29,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2023-04-02 06:23:29,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 251. [2023-04-02 06:23:29,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 246 states have (on average 1.451219512195122) internal successors, (357), 247 states have internal predecessors, (357), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:23:29,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 360 transitions. [2023-04-02 06:23:29,036 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 360 transitions. Word has length 53 [2023-04-02 06:23:29,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:23:29,038 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 360 transitions. [2023-04-02 06:23:29,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 5 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:23:29,038 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 360 transitions. [2023-04-02 06:23:29,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-02 06:23:29,044 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:23:29,044 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:23:29,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 06:23:29,044 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:23:29,044 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:23:29,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1869952833, now seen corresponding path program 1 times [2023-04-02 06:23:29,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:23:29,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294123982] [2023-04-02 06:23:29,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:23:29,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:23:29,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:23:29,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:23:29,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:23:29,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:23:29,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:23:29,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294123982] [2023-04-02 06:23:29,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294123982] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:23:29,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:23:29,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 06:23:29,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394893290] [2023-04-02 06:23:29,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:23:29,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:23:29,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:23:29,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:23:29,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:23:29,282 INFO L87 Difference]: Start difference. First operand 251 states and 360 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 5 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:23:29,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:23:29,727 INFO L93 Difference]: Finished difference Result 564 states and 827 transitions. [2023-04-02 06:23:29,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:23:29,728 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 5 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2023-04-02 06:23:29,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:23:29,730 INFO L225 Difference]: With dead ends: 564 [2023-04-02 06:23:29,731 INFO L226 Difference]: Without dead ends: 482 [2023-04-02 06:23:29,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-04-02 06:23:29,743 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 357 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:23:29,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 495 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:23:29,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2023-04-02 06:23:29,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 379. [2023-04-02 06:23:29,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 374 states have (on average 1.4705882352941178) internal successors, (550), 375 states have internal predecessors, (550), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:23:29,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 553 transitions. [2023-04-02 06:23:29,779 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 553 transitions. Word has length 53 [2023-04-02 06:23:29,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:23:29,780 INFO L495 AbstractCegarLoop]: Abstraction has 379 states and 553 transitions. [2023-04-02 06:23:29,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 5 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:23:29,780 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 553 transitions. [2023-04-02 06:23:29,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-02 06:23:29,781 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:23:29,781 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:23:29,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 06:23:29,781 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:23:29,782 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:23:29,782 INFO L85 PathProgramCache]: Analyzing trace with hash 2032261186, now seen corresponding path program 1 times [2023-04-02 06:23:29,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:23:29,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555250861] [2023-04-02 06:23:29,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:23:29,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:23:29,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:23:29,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:23:29,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:23:29,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:23:29,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:23:29,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555250861] [2023-04-02 06:23:29,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555250861] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:23:29,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:23:29,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 06:23:29,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166888515] [2023-04-02 06:23:29,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:23:29,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:23:29,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:23:29,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:23:29,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:23:29,951 INFO L87 Difference]: Start difference. First operand 379 states and 553 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 5 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:23:30,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:23:30,448 INFO L93 Difference]: Finished difference Result 650 states and 957 transitions. [2023-04-02 06:23:30,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:23:30,449 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 5 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2023-04-02 06:23:30,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:23:30,451 INFO L225 Difference]: With dead ends: 650 [2023-04-02 06:23:30,452 INFO L226 Difference]: Without dead ends: 568 [2023-04-02 06:23:30,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-04-02 06:23:30,457 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 346 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:23:30,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 585 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:23:30,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2023-04-02 06:23:30,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 470. [2023-04-02 06:23:30,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 465 states have (on average 1.4795698924731182) internal successors, (688), 466 states have internal predecessors, (688), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:23:30,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 691 transitions. [2023-04-02 06:23:30,498 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 691 transitions. Word has length 53 [2023-04-02 06:23:30,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:23:30,498 INFO L495 AbstractCegarLoop]: Abstraction has 470 states and 691 transitions. [2023-04-02 06:23:30,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 5 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:23:30,499 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 691 transitions. [2023-04-02 06:23:30,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-02 06:23:30,499 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:23:30,499 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:23:30,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-02 06:23:30,500 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:23:30,500 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:23:30,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1402534896, now seen corresponding path program 1 times [2023-04-02 06:23:30,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:23:30,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707249389] [2023-04-02 06:23:30,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:23:30,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:23:30,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:23:30,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:23:30,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:23:30,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:23:30,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:23:30,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707249389] [2023-04-02 06:23:30,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707249389] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:23:30,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:23:30,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 06:23:30,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616999132] [2023-04-02 06:23:30,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:23:30,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:23:30,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:23:30,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:23:30,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:23:30,697 INFO L87 Difference]: Start difference. First operand 470 states and 691 transitions. Second operand has 6 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:23:31,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:23:31,051 INFO L93 Difference]: Finished difference Result 910 states and 1350 transitions. [2023-04-02 06:23:31,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:23:31,051 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2023-04-02 06:23:31,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:23:31,053 INFO L225 Difference]: With dead ends: 910 [2023-04-02 06:23:31,053 INFO L226 Difference]: Without dead ends: 470 [2023-04-02 06:23:31,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-04-02 06:23:31,055 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 366 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:23:31,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 93 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:23:31,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2023-04-02 06:23:31,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 470. [2023-04-02 06:23:31,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 465 states have (on average 1.4580645161290322) internal successors, (678), 466 states have internal predecessors, (678), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:23:31,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 681 transitions. [2023-04-02 06:23:31,114 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 681 transitions. Word has length 54 [2023-04-02 06:23:31,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:23:31,115 INFO L495 AbstractCegarLoop]: Abstraction has 470 states and 681 transitions. [2023-04-02 06:23:31,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:23:31,115 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 681 transitions. [2023-04-02 06:23:31,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-02 06:23:31,115 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:23:31,116 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:23:31,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-02 06:23:31,116 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:23:31,116 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:23:31,116 INFO L85 PathProgramCache]: Analyzing trace with hash -634385001, now seen corresponding path program 1 times [2023-04-02 06:23:31,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:23:31,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130673119] [2023-04-02 06:23:31,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:23:31,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:23:31,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:23:31,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:23:31,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:23:31,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:23:31,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:23:31,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130673119] [2023-04-02 06:23:31,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130673119] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:23:31,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:23:31,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 06:23:31,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591021527] [2023-04-02 06:23:31,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:23:31,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:23:31,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:23:31,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:23:31,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:23:31,308 INFO L87 Difference]: Start difference. First operand 470 states and 681 transitions. Second operand has 6 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:23:31,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:23:31,651 INFO L93 Difference]: Finished difference Result 906 states and 1326 transitions. [2023-04-02 06:23:31,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:23:31,652 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2023-04-02 06:23:31,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:23:31,654 INFO L225 Difference]: With dead ends: 906 [2023-04-02 06:23:31,654 INFO L226 Difference]: Without dead ends: 470 [2023-04-02 06:23:31,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-04-02 06:23:31,656 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 348 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:23:31,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 101 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:23:31,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2023-04-02 06:23:31,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 470. [2023-04-02 06:23:31,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 465 states have (on average 1.4365591397849462) internal successors, (668), 466 states have internal predecessors, (668), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:23:31,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 671 transitions. [2023-04-02 06:23:31,710 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 671 transitions. Word has length 55 [2023-04-02 06:23:31,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:23:31,710 INFO L495 AbstractCegarLoop]: Abstraction has 470 states and 671 transitions. [2023-04-02 06:23:31,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:23:31,710 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 671 transitions. [2023-04-02 06:23:31,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-02 06:23:31,712 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:23:31,712 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:23:31,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-02 06:23:31,713 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:23:31,713 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:23:31,713 INFO L85 PathProgramCache]: Analyzing trace with hash -183310977, now seen corresponding path program 1 times [2023-04-02 06:23:31,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:23:31,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390836687] [2023-04-02 06:23:31,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:23:31,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:23:31,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:23:31,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:23:31,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:23:31,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:23:31,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:23:31,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390836687] [2023-04-02 06:23:31,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390836687] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:23:31,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:23:31,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 06:23:31,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982709939] [2023-04-02 06:23:31,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:23:31,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:23:31,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:23:31,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:23:31,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:23:31,935 INFO L87 Difference]: Start difference. First operand 470 states and 671 transitions. Second operand has 6 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:23:32,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:23:32,351 INFO L93 Difference]: Finished difference Result 1318 states and 1906 transitions. [2023-04-02 06:23:32,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:23:32,351 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2023-04-02 06:23:32,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:23:32,355 INFO L225 Difference]: With dead ends: 1318 [2023-04-02 06:23:32,355 INFO L226 Difference]: Without dead ends: 874 [2023-04-02 06:23:32,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-04-02 06:23:32,357 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 539 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:23:32,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [539 Valid, 137 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:23:32,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2023-04-02 06:23:32,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 869. [2023-04-02 06:23:32,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 864 states have (on average 1.4421296296296295) internal successors, (1246), 865 states have internal predecessors, (1246), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:23:32,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 1249 transitions. [2023-04-02 06:23:32,440 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 1249 transitions. Word has length 56 [2023-04-02 06:23:32,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:23:32,440 INFO L495 AbstractCegarLoop]: Abstraction has 869 states and 1249 transitions. [2023-04-02 06:23:32,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:23:32,440 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 1249 transitions. [2023-04-02 06:23:32,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-02 06:23:32,441 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:23:32,441 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:23:32,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-02 06:23:32,441 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:23:32,442 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:23:32,442 INFO L85 PathProgramCache]: Analyzing trace with hash 863873077, now seen corresponding path program 1 times [2023-04-02 06:23:32,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:23:32,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969736430] [2023-04-02 06:23:32,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:23:32,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:23:32,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:23:32,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:23:32,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:23:32,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:23:32,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:23:32,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969736430] [2023-04-02 06:23:32,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969736430] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:23:32,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:23:32,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-02 06:23:32,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339686215] [2023-04-02 06:23:32,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:23:32,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-02 06:23:32,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:23:32,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-02 06:23:32,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-04-02 06:23:32,776 INFO L87 Difference]: Start difference. First operand 869 states and 1249 transitions. Second operand has 11 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:23:33,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:23:33,678 INFO L93 Difference]: Finished difference Result 2085 states and 2998 transitions. [2023-04-02 06:23:33,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-02 06:23:33,679 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2023-04-02 06:23:33,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:23:33,683 INFO L225 Difference]: With dead ends: 2085 [2023-04-02 06:23:33,683 INFO L226 Difference]: Without dead ends: 1309 [2023-04-02 06:23:33,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2023-04-02 06:23:33,687 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 1133 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1133 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:23:33,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1133 Valid, 267 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:23:33,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1309 states. [2023-04-02 06:23:33,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1309 to 869. [2023-04-02 06:23:33,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 864 states have (on average 1.4386574074074074) internal successors, (1243), 865 states have internal predecessors, (1243), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:23:33,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 1246 transitions. [2023-04-02 06:23:33,827 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 1246 transitions. Word has length 57 [2023-04-02 06:23:33,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:23:33,828 INFO L495 AbstractCegarLoop]: Abstraction has 869 states and 1246 transitions. [2023-04-02 06:23:33,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:23:33,828 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 1246 transitions. [2023-04-02 06:23:33,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-02 06:23:33,828 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:23:33,829 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:23:33,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-02 06:23:33,829 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:23:33,829 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:23:33,829 INFO L85 PathProgramCache]: Analyzing trace with hash -2134065602, now seen corresponding path program 1 times [2023-04-02 06:23:33,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:23:33,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453848351] [2023-04-02 06:23:33,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:23:33,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:23:33,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:23:34,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:23:34,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:23:34,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:23:34,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:23:34,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453848351] [2023-04-02 06:23:34,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453848351] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:23:34,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:23:34,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-02 06:23:34,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18581785] [2023-04-02 06:23:34,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:23:34,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-02 06:23:34,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:23:34,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-02 06:23:34,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-04-02 06:23:34,253 INFO L87 Difference]: Start difference. First operand 869 states and 1246 transitions. Second operand has 10 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:23:35,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:23:35,211 INFO L93 Difference]: Finished difference Result 2394 states and 3470 transitions. [2023-04-02 06:23:35,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 06:23:35,212 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2023-04-02 06:23:35,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:23:35,218 INFO L225 Difference]: With dead ends: 2394 [2023-04-02 06:23:35,218 INFO L226 Difference]: Without dead ends: 1630 [2023-04-02 06:23:35,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2023-04-02 06:23:35,220 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 1037 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1037 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:23:35,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1037 Valid, 230 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:23:35,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1630 states. [2023-04-02 06:23:35,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1630 to 869. [2023-04-02 06:23:35,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 864 states have (on average 1.4375) internal successors, (1242), 865 states have internal predecessors, (1242), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:23:35,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 1245 transitions. [2023-04-02 06:23:35,399 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 1245 transitions. Word has length 57 [2023-04-02 06:23:35,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:23:35,400 INFO L495 AbstractCegarLoop]: Abstraction has 869 states and 1245 transitions. [2023-04-02 06:23:35,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:23:35,400 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 1245 transitions. [2023-04-02 06:23:35,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-02 06:23:35,400 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:23:35,401 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:23:35,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-02 06:23:35,401 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:23:35,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:23:35,401 INFO L85 PathProgramCache]: Analyzing trace with hash -208385422, now seen corresponding path program 1 times [2023-04-02 06:23:35,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:23:35,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74015354] [2023-04-02 06:23:35,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:23:35,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:23:35,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:23:35,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:23:35,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:23:35,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:23:35,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:23:35,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74015354] [2023-04-02 06:23:35,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74015354] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:23:35,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:23:35,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-02 06:23:35,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906318983] [2023-04-02 06:23:35,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:23:35,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-02 06:23:35,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:23:35,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-02 06:23:35,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-04-02 06:23:35,708 INFO L87 Difference]: Start difference. First operand 869 states and 1245 transitions. Second operand has 11 states, 10 states have (on average 5.5) internal successors, (55), 9 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:23:37,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:23:37,010 INFO L93 Difference]: Finished difference Result 2442 states and 3519 transitions. [2023-04-02 06:23:37,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-02 06:23:37,011 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.5) internal successors, (55), 9 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2023-04-02 06:23:37,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:23:37,017 INFO L225 Difference]: With dead ends: 2442 [2023-04-02 06:23:37,017 INFO L226 Difference]: Without dead ends: 1681 [2023-04-02 06:23:37,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2023-04-02 06:23:37,019 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 671 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 06:23:37,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [671 Valid, 402 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 06:23:37,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1681 states. [2023-04-02 06:23:37,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1681 to 869. [2023-04-02 06:23:37,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 864 states have (on average 1.4305555555555556) internal successors, (1236), 865 states have internal predecessors, (1236), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:23:37,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 1239 transitions. [2023-04-02 06:23:37,281 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 1239 transitions. Word has length 58 [2023-04-02 06:23:37,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:23:37,281 INFO L495 AbstractCegarLoop]: Abstraction has 869 states and 1239 transitions. [2023-04-02 06:23:37,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.5) internal successors, (55), 9 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:23:37,282 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 1239 transitions. [2023-04-02 06:23:37,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-02 06:23:37,282 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:23:37,282 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:23:37,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-02 06:23:37,283 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:23:37,283 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:23:37,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1888191086, now seen corresponding path program 1 times [2023-04-02 06:23:37,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:23:37,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388920173] [2023-04-02 06:23:37,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:23:37,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:23:37,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:23:37,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:23:37,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:23:37,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:23:37,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:23:37,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388920173] [2023-04-02 06:23:37,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388920173] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:23:37,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:23:37,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-04-02 06:23:37,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892204784] [2023-04-02 06:23:37,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:23:37,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 06:23:37,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:23:37,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 06:23:37,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-04-02 06:23:37,998 INFO L87 Difference]: Start difference. First operand 869 states and 1239 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:23:40,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:23:40,322 INFO L93 Difference]: Finished difference Result 3399 states and 4948 transitions. [2023-04-02 06:23:40,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-02 06:23:40,322 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2023-04-02 06:23:40,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:23:40,332 INFO L225 Difference]: With dead ends: 3399 [2023-04-02 06:23:40,332 INFO L226 Difference]: Without dead ends: 3047 [2023-04-02 06:23:40,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=142, Invalid=364, Unknown=0, NotChecked=0, Total=506 [2023-04-02 06:23:40,334 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 789 mSDsluCounter, 706 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 789 SdHoareTripleChecker+Valid, 981 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-02 06:23:40,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [789 Valid, 981 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-02 06:23:40,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3047 states. [2023-04-02 06:23:40,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3047 to 848. [2023-04-02 06:23:40,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 843 states have (on average 1.431791221826809) internal successors, (1207), 844 states have internal predecessors, (1207), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:23:40,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 1210 transitions. [2023-04-02 06:23:40,632 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 1210 transitions. Word has length 59 [2023-04-02 06:23:40,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:23:40,632 INFO L495 AbstractCegarLoop]: Abstraction has 848 states and 1210 transitions. [2023-04-02 06:23:40,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:23:40,633 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 1210 transitions. [2023-04-02 06:23:40,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-02 06:23:40,633 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:23:40,633 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:23:40,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-02 06:23:40,634 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:23:40,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:23:40,634 INFO L85 PathProgramCache]: Analyzing trace with hash 817069193, now seen corresponding path program 1 times [2023-04-02 06:23:40,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:23:40,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218934083] [2023-04-02 06:23:40,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:23:40,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:23:40,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:23:41,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:23:41,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:23:41,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:23:41,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:23:41,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218934083] [2023-04-02 06:23:41,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218934083] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:23:41,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:23:41,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-04-02 06:23:41,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943435557] [2023-04-02 06:23:41,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:23:41,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-02 06:23:41,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:23:41,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-02 06:23:41,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2023-04-02 06:23:41,263 INFO L87 Difference]: Start difference. First operand 848 states and 1210 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:23:43,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:23:43,894 INFO L93 Difference]: Finished difference Result 3400 states and 4945 transitions. [2023-04-02 06:23:43,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-02 06:23:43,894 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2023-04-02 06:23:43,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:23:43,902 INFO L225 Difference]: With dead ends: 3400 [2023-04-02 06:23:43,902 INFO L226 Difference]: Without dead ends: 3051 [2023-04-02 06:23:43,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2023-04-02 06:23:43,904 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 807 mSDsluCounter, 1208 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 807 SdHoareTripleChecker+Valid, 1486 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-02 06:23:43,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [807 Valid, 1486 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 782 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-02 06:23:43,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3051 states. [2023-04-02 06:23:44,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3051 to 824. [2023-04-02 06:23:44,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 819 states have (on average 1.4322344322344323) internal successors, (1173), 820 states have internal predecessors, (1173), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:23:44,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 1176 transitions. [2023-04-02 06:23:44,226 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 1176 transitions. Word has length 59 [2023-04-02 06:23:44,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:23:44,226 INFO L495 AbstractCegarLoop]: Abstraction has 824 states and 1176 transitions. [2023-04-02 06:23:44,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:23:44,226 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 1176 transitions. [2023-04-02 06:23:44,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-02 06:23:44,227 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:23:44,227 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:23:44,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-02 06:23:44,227 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:23:44,227 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:23:44,228 INFO L85 PathProgramCache]: Analyzing trace with hash 159625514, now seen corresponding path program 1 times [2023-04-02 06:23:44,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:23:44,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645082948] [2023-04-02 06:23:44,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:23:44,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:23:44,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:23:44,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:23:44,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:23:44,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:23:44,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:23:44,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645082948] [2023-04-02 06:23:44,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645082948] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:23:44,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:23:44,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-04-02 06:23:44,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666243153] [2023-04-02 06:23:44,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:23:44,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-02 06:23:44,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:23:44,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-02 06:23:44,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2023-04-02 06:23:44,986 INFO L87 Difference]: Start difference. First operand 824 states and 1176 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:23:47,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:23:47,663 INFO L93 Difference]: Finished difference Result 3367 states and 4899 transitions. [2023-04-02 06:23:47,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-04-02 06:23:47,664 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2023-04-02 06:23:47,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:23:47,671 INFO L225 Difference]: With dead ends: 3367 [2023-04-02 06:23:47,671 INFO L226 Difference]: Without dead ends: 2630 [2023-04-02 06:23:47,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=262, Invalid=1220, Unknown=0, NotChecked=0, Total=1482 [2023-04-02 06:23:47,673 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 512 mSDsluCounter, 2137 mSDsCounter, 0 mSdLazyCounter, 1482 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 2348 SdHoareTripleChecker+Invalid, 1509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-02 06:23:47,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [512 Valid, 2348 Invalid, 1509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1482 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-02 06:23:47,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2630 states. [2023-04-02 06:23:47,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2630 to 828. [2023-04-02 06:23:47,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 823 states have (on average 1.4289185905224788) internal successors, (1176), 824 states have internal predecessors, (1176), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:23:47,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1179 transitions. [2023-04-02 06:23:47,986 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1179 transitions. Word has length 59 [2023-04-02 06:23:47,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:23:47,986 INFO L495 AbstractCegarLoop]: Abstraction has 828 states and 1179 transitions. [2023-04-02 06:23:47,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:23:47,986 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1179 transitions. [2023-04-02 06:23:47,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-02 06:23:47,987 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:23:47,987 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:23:47,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-02 06:23:47,987 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:23:47,988 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:23:47,988 INFO L85 PathProgramCache]: Analyzing trace with hash 849845676, now seen corresponding path program 1 times [2023-04-02 06:23:47,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:23:47,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555808451] [2023-04-02 06:23:47,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:23:47,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:23:48,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:23:49,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:23:49,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:23:49,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:23:49,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:23:49,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555808451] [2023-04-02 06:23:49,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555808451] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:23:49,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:23:49,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2023-04-02 06:23:49,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31344024] [2023-04-02 06:23:49,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:23:49,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-02 06:23:49,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:23:49,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-02 06:23:49,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2023-04-02 06:23:49,379 INFO L87 Difference]: Start difference. First operand 828 states and 1179 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:23:54,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:23:54,331 INFO L93 Difference]: Finished difference Result 2546 states and 3698 transitions. [2023-04-02 06:23:54,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-04-02 06:23:54,331 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2023-04-02 06:23:54,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:23:54,337 INFO L225 Difference]: With dead ends: 2546 [2023-04-02 06:23:54,337 INFO L226 Difference]: Without dead ends: 2215 [2023-04-02 06:23:54,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=358, Invalid=1804, Unknown=0, NotChecked=0, Total=2162 [2023-04-02 06:23:54,338 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 482 mSDsluCounter, 2822 mSDsCounter, 0 mSdLazyCounter, 1994 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 3024 SdHoareTripleChecker+Invalid, 2009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:23:54,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [482 Valid, 3024 Invalid, 2009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1994 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-02 06:23:54,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2215 states. [2023-04-02 06:23:54,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2215 to 828. [2023-04-02 06:23:54,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 823 states have (on average 1.4277035236938032) internal successors, (1175), 824 states have internal predecessors, (1175), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:23:54,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1178 transitions. [2023-04-02 06:23:54,712 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1178 transitions. Word has length 60 [2023-04-02 06:23:54,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:23:54,712 INFO L495 AbstractCegarLoop]: Abstraction has 828 states and 1178 transitions. [2023-04-02 06:23:54,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:23:54,712 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1178 transitions. [2023-04-02 06:23:54,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-02 06:23:54,713 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:23:54,713 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:23:54,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-02 06:23:54,713 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:23:54,713 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:23:54,713 INFO L85 PathProgramCache]: Analyzing trace with hash 469715920, now seen corresponding path program 1 times [2023-04-02 06:23:54,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:23:54,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219305801] [2023-04-02 06:23:54,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:23:54,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:23:54,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:23:55,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:23:55,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:23:55,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:23:55,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:23:55,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219305801] [2023-04-02 06:23:55,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219305801] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:23:55,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:23:55,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-04-02 06:23:55,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547773083] [2023-04-02 06:23:55,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:23:55,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-02 06:23:55,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:23:55,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-02 06:23:55,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2023-04-02 06:23:55,359 INFO L87 Difference]: Start difference. First operand 828 states and 1178 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:23:57,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:23:57,772 INFO L93 Difference]: Finished difference Result 2204 states and 3201 transitions. [2023-04-02 06:23:57,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-02 06:23:57,773 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2023-04-02 06:23:57,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:23:57,779 INFO L225 Difference]: With dead ends: 2204 [2023-04-02 06:23:57,779 INFO L226 Difference]: Without dead ends: 1868 [2023-04-02 06:23:57,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=172, Invalid=640, Unknown=0, NotChecked=0, Total=812 [2023-04-02 06:23:57,781 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 780 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 780 SdHoareTripleChecker+Valid, 1240 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 06:23:57,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [780 Valid, 1240 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 06:23:57,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1868 states. [2023-04-02 06:23:58,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1868 to 817. [2023-04-02 06:23:58,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 812 states have (on average 1.4310344827586208) internal successors, (1162), 813 states have internal predecessors, (1162), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:23:58,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 1165 transitions. [2023-04-02 06:23:58,190 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 1165 transitions. Word has length 60 [2023-04-02 06:23:58,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:23:58,190 INFO L495 AbstractCegarLoop]: Abstraction has 817 states and 1165 transitions. [2023-04-02 06:23:58,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:23:58,191 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 1165 transitions. [2023-04-02 06:23:58,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-04-02 06:23:58,191 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:23:58,191 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:23:58,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-02 06:23:58,192 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:23:58,192 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:23:58,192 INFO L85 PathProgramCache]: Analyzing trace with hash 391704462, now seen corresponding path program 1 times [2023-04-02 06:23:58,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:23:58,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45551647] [2023-04-02 06:23:58,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:23:58,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:23:58,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:23:59,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:23:59,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:23:59,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:23:59,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:23:59,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45551647] [2023-04-02 06:23:59,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45551647] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:23:59,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:23:59,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2023-04-02 06:23:59,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735233573] [2023-04-02 06:23:59,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:23:59,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-04-02 06:23:59,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:23:59,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-04-02 06:23:59,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2023-04-02 06:23:59,032 INFO L87 Difference]: Start difference. First operand 817 states and 1165 transitions. Second operand has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 21 states have internal predecessors, (58), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:24:02,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:24:02,451 INFO L93 Difference]: Finished difference Result 2613 states and 3799 transitions. [2023-04-02 06:24:02,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-04-02 06:24:02,451 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 21 states have internal predecessors, (58), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2023-04-02 06:24:02,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:24:02,457 INFO L225 Difference]: With dead ends: 2613 [2023-04-02 06:24:02,457 INFO L226 Difference]: Without dead ends: 2277 [2023-04-02 06:24:02,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=319, Invalid=1661, Unknown=0, NotChecked=0, Total=1980 [2023-04-02 06:24:02,458 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 422 mSDsluCounter, 1870 mSDsCounter, 0 mSdLazyCounter, 1475 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 2010 SdHoareTripleChecker+Invalid, 1507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-02 06:24:02,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 2010 Invalid, 1507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1475 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-02 06:24:02,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2277 states. [2023-04-02 06:24:02,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2277 to 803. [2023-04-02 06:24:02,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 799 states have (on average 1.4355444305381728) internal successors, (1147), 799 states have internal predecessors, (1147), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:24:02,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1150 transitions. [2023-04-02 06:24:02,885 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1150 transitions. Word has length 61 [2023-04-02 06:24:02,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:24:02,885 INFO L495 AbstractCegarLoop]: Abstraction has 803 states and 1150 transitions. [2023-04-02 06:24:02,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 21 states have internal predecessors, (58), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:24:02,885 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1150 transitions. [2023-04-02 06:24:02,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-04-02 06:24:02,892 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:24:02,892 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:24:02,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-04-02 06:24:02,893 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:24:02,893 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:24:02,893 INFO L85 PathProgramCache]: Analyzing trace with hash 295964729, now seen corresponding path program 1 times [2023-04-02 06:24:02,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:24:02,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338191179] [2023-04-02 06:24:02,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:24:02,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:24:02,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:24:03,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:24:03,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:24:03,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:24:03,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:24:03,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338191179] [2023-04-02 06:24:03,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338191179] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:24:03,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:24:03,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 06:24:03,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50979348] [2023-04-02 06:24:03,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:24:03,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 06:24:03,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:24:03,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 06:24:03,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:24:03,035 INFO L87 Difference]: Start difference. First operand 803 states and 1150 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 4 states have internal predecessors, (77), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:24:04,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:24:04,263 INFO L93 Difference]: Finished difference Result 2211 states and 3224 transitions. [2023-04-02 06:24:04,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:24:04,263 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 4 states have internal predecessors, (77), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2023-04-02 06:24:04,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:24:04,267 INFO L225 Difference]: With dead ends: 2211 [2023-04-02 06:24:04,267 INFO L226 Difference]: Without dead ends: 1489 [2023-04-02 06:24:04,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-02 06:24:04,272 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 224 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:24:04,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 161 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:24:04,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1489 states. [2023-04-02 06:24:04,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1489 to 782. [2023-04-02 06:24:04,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 778 states have (on average 1.4344473007712082) internal successors, (1116), 778 states have internal predecessors, (1116), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:24:04,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 1119 transitions. [2023-04-02 06:24:04,728 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 1119 transitions. Word has length 80 [2023-04-02 06:24:04,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:24:04,728 INFO L495 AbstractCegarLoop]: Abstraction has 782 states and 1119 transitions. [2023-04-02 06:24:04,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 4 states have internal predecessors, (77), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:24:04,729 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 1119 transitions. [2023-04-02 06:24:04,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-04-02 06:24:04,730 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:24:04,730 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:24:04,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-04-02 06:24:04,730 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:24:04,730 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:24:04,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1612279756, now seen corresponding path program 1 times [2023-04-02 06:24:04,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:24:04,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583879856] [2023-04-02 06:24:04,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:24:04,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:24:04,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:24:04,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:24:04,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:24:04,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:24:04,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:24:04,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583879856] [2023-04-02 06:24:04,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583879856] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:24:04,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:24:04,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:24:04,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864857092] [2023-04-02 06:24:04,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:24:04,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:24:04,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:24:04,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:24:04,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:24:04,884 INFO L87 Difference]: Start difference. First operand 782 states and 1119 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:24:05,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:24:05,859 INFO L93 Difference]: Finished difference Result 1942 states and 2819 transitions. [2023-04-02 06:24:05,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:24:05,859 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2023-04-02 06:24:05,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:24:05,862 INFO L225 Difference]: With dead ends: 1942 [2023-04-02 06:24:05,862 INFO L226 Difference]: Without dead ends: 1229 [2023-04-02 06:24:05,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:24:05,864 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 74 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:24:05,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 190 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:24:05,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2023-04-02 06:24:06,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 1215. [2023-04-02 06:24:06,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1215 states, 1211 states have (on average 1.421139554087531) internal successors, (1721), 1211 states have internal predecessors, (1721), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:24:06,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 1724 transitions. [2023-04-02 06:24:06,555 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 1724 transitions. Word has length 80 [2023-04-02 06:24:06,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:24:06,556 INFO L495 AbstractCegarLoop]: Abstraction has 1215 states and 1724 transitions. [2023-04-02 06:24:06,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:24:06,556 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 1724 transitions. [2023-04-02 06:24:06,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-04-02 06:24:06,557 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:24:06,557 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:24:06,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-04-02 06:24:06,557 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:24:06,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:24:06,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1124615315, now seen corresponding path program 1 times [2023-04-02 06:24:06,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:24:06,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395861674] [2023-04-02 06:24:06,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:24:06,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:24:06,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:24:06,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:24:06,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:24:06,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:24:06,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:24:06,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395861674] [2023-04-02 06:24:06,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395861674] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:24:06,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:24:06,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:24:06,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444676456] [2023-04-02 06:24:06,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:24:06,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:24:06,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:24:06,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:24:06,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:24:06,740 INFO L87 Difference]: Start difference. First operand 1215 states and 1724 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 3 states have internal predecessors, (78), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:24:08,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:24:08,356 INFO L93 Difference]: Finished difference Result 3363 states and 4774 transitions. [2023-04-02 06:24:08,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:24:08,357 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 3 states have internal predecessors, (78), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2023-04-02 06:24:08,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:24:08,361 INFO L225 Difference]: With dead ends: 3363 [2023-04-02 06:24:08,361 INFO L226 Difference]: Without dead ends: 2217 [2023-04-02 06:24:08,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:24:08,363 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 52 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:24:08,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 255 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:24:08,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2217 states. [2023-04-02 06:24:09,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2217 to 2071. [2023-04-02 06:24:09,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2071 states, 2067 states have (on average 1.4044508950169328) internal successors, (2903), 2067 states have internal predecessors, (2903), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:24:09,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2071 states to 2071 states and 2906 transitions. [2023-04-02 06:24:09,608 INFO L78 Accepts]: Start accepts. Automaton has 2071 states and 2906 transitions. Word has length 81 [2023-04-02 06:24:09,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:24:09,608 INFO L495 AbstractCegarLoop]: Abstraction has 2071 states and 2906 transitions. [2023-04-02 06:24:09,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 3 states have internal predecessors, (78), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:24:09,608 INFO L276 IsEmpty]: Start isEmpty. Operand 2071 states and 2906 transitions. [2023-04-02 06:24:09,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-04-02 06:24:09,609 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:24:09,609 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:24:09,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-04-02 06:24:09,610 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:24:09,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:24:09,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1592795184, now seen corresponding path program 1 times [2023-04-02 06:24:09,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:24:09,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597914928] [2023-04-02 06:24:09,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:24:09,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:24:09,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:24:09,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:24:09,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:24:09,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:24:09,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:24:09,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597914928] [2023-04-02 06:24:09,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597914928] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:24:09,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:24:09,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:24:09,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293400218] [2023-04-02 06:24:09,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:24:09,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:24:09,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:24:09,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:24:09,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:24:09,770 INFO L87 Difference]: Start difference. First operand 2071 states and 2906 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 3 states have internal predecessors, (79), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:24:12,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:24:12,441 INFO L93 Difference]: Finished difference Result 5787 states and 8068 transitions. [2023-04-02 06:24:12,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:24:12,442 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 3 states have internal predecessors, (79), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2023-04-02 06:24:12,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:24:12,447 INFO L225 Difference]: With dead ends: 5787 [2023-04-02 06:24:12,447 INFO L226 Difference]: Without dead ends: 3785 [2023-04-02 06:24:12,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:24:12,450 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 45 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:24:12,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 252 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:24:12,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3785 states. [2023-04-02 06:24:14,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3785 to 3495. [2023-04-02 06:24:14,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3495 states, 3491 states have (on average 1.3746777427671155) internal successors, (4799), 3491 states have internal predecessors, (4799), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:24:14,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3495 states to 3495 states and 4802 transitions. [2023-04-02 06:24:14,686 INFO L78 Accepts]: Start accepts. Automaton has 3495 states and 4802 transitions. Word has length 82 [2023-04-02 06:24:14,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:24:14,686 INFO L495 AbstractCegarLoop]: Abstraction has 3495 states and 4802 transitions. [2023-04-02 06:24:14,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 3 states have internal predecessors, (79), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:24:14,686 INFO L276 IsEmpty]: Start isEmpty. Operand 3495 states and 4802 transitions. [2023-04-02 06:24:14,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-04-02 06:24:14,687 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:24:14,687 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:24:14,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-04-02 06:24:14,687 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:24:14,687 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:24:14,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1991325320, now seen corresponding path program 1 times [2023-04-02 06:24:14,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:24:14,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056049457] [2023-04-02 06:24:14,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:24:14,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:24:14,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:24:14,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:24:14,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:24:14,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:24:14,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:24:14,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056049457] [2023-04-02 06:24:14,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056049457] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:24:14,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:24:14,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 06:24:14,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433324298] [2023-04-02 06:24:14,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:24:14,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 06:24:14,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:24:14,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 06:24:14,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 06:24:14,935 INFO L87 Difference]: Start difference. First operand 3495 states and 4802 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 6 states have internal predecessors, (80), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:24:18,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:24:18,703 INFO L93 Difference]: Finished difference Result 5313 states and 7228 transitions. [2023-04-02 06:24:18,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 06:24:18,705 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 6 states have internal predecessors, (80), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2023-04-02 06:24:18,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:24:18,713 INFO L225 Difference]: With dead ends: 5313 [2023-04-02 06:24:18,713 INFO L226 Difference]: Without dead ends: 5311 [2023-04-02 06:24:18,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-04-02 06:24:18,715 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 193 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 654 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:24:18,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 654 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:24:18,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5311 states. [2023-04-02 06:24:21,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5311 to 3591. [2023-04-02 06:24:21,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3591 states, 3587 states have (on average 1.3534987454697518) internal successors, (4855), 3587 states have internal predecessors, (4855), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:24:21,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3591 states to 3591 states and 4858 transitions. [2023-04-02 06:24:21,113 INFO L78 Accepts]: Start accepts. Automaton has 3591 states and 4858 transitions. Word has length 83 [2023-04-02 06:24:21,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:24:21,114 INFO L495 AbstractCegarLoop]: Abstraction has 3591 states and 4858 transitions. [2023-04-02 06:24:21,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 6 states have internal predecessors, (80), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:24:21,114 INFO L276 IsEmpty]: Start isEmpty. Operand 3591 states and 4858 transitions. [2023-04-02 06:24:21,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-04-02 06:24:21,115 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:24:21,115 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:24:21,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-04-02 06:24:21,115 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:24:21,115 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:24:21,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1230399967, now seen corresponding path program 1 times [2023-04-02 06:24:21,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:24:21,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682753230] [2023-04-02 06:24:21,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:24:21,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:24:21,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:24:21,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:24:21,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:24:21,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:24:21,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:24:21,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682753230] [2023-04-02 06:24:21,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682753230] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:24:21,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:24:21,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 06:24:21,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983609728] [2023-04-02 06:24:21,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:24:21,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 06:24:21,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:24:21,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 06:24:21,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-02 06:24:21,337 INFO L87 Difference]: Start difference. First operand 3591 states and 4858 transitions. Second operand has 8 states, 7 states have (on average 11.714285714285714) internal successors, (82), 6 states have internal predecessors, (82), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:24:25,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:24:25,316 INFO L93 Difference]: Finished difference Result 8759 states and 11774 transitions. [2023-04-02 06:24:25,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 06:24:25,316 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.714285714285714) internal successors, (82), 6 states have internal predecessors, (82), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2023-04-02 06:24:25,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:24:25,325 INFO L225 Difference]: With dead ends: 8759 [2023-04-02 06:24:25,325 INFO L226 Difference]: Without dead ends: 5237 [2023-04-02 06:24:25,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2023-04-02 06:24:25,330 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 779 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 779 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:24:25,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [779 Valid, 220 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:24:25,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5237 states. [2023-04-02 06:24:27,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5237 to 3555. [2023-04-02 06:24:27,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3555 states, 3551 states have (on average 1.3368065333708814) internal successors, (4747), 3551 states have internal predecessors, (4747), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:24:27,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3555 states to 3555 states and 4750 transitions. [2023-04-02 06:24:27,803 INFO L78 Accepts]: Start accepts. Automaton has 3555 states and 4750 transitions. Word has length 85 [2023-04-02 06:24:27,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:24:27,803 INFO L495 AbstractCegarLoop]: Abstraction has 3555 states and 4750 transitions. [2023-04-02 06:24:27,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.714285714285714) internal successors, (82), 6 states have internal predecessors, (82), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:24:27,803 INFO L276 IsEmpty]: Start isEmpty. Operand 3555 states and 4750 transitions. [2023-04-02 06:24:27,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-04-02 06:24:27,805 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:24:27,805 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:24:27,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-04-02 06:24:27,806 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:24:27,806 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:24:27,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1968239888, now seen corresponding path program 1 times [2023-04-02 06:24:27,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:24:27,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915892401] [2023-04-02 06:24:27,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:24:27,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:24:27,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:24:27,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:24:27,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:24:27,961 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:24:27,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:24:27,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915892401] [2023-04-02 06:24:27,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915892401] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:24:27,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:24:27,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:24:27,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733385625] [2023-04-02 06:24:27,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:24:27,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:24:27,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:24:27,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:24:27,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:24:27,963 INFO L87 Difference]: Start difference. First operand 3555 states and 4750 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 3 states have internal predecessors, (102), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:24:31,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:24:31,263 INFO L93 Difference]: Finished difference Result 8111 states and 10856 transitions. [2023-04-02 06:24:31,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 06:24:31,263 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 3 states have internal predecessors, (102), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 105 [2023-04-02 06:24:31,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:24:31,274 INFO L225 Difference]: With dead ends: 8111 [2023-04-02 06:24:31,274 INFO L226 Difference]: Without dead ends: 4625 [2023-04-02 06:24:31,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:24:31,282 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 54 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:24:31,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 232 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:24:31,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4625 states. [2023-04-02 06:24:34,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4625 to 4219. [2023-04-02 06:24:34,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4219 states, 4215 states have (on average 1.3141162514827995) internal successors, (5539), 4215 states have internal predecessors, (5539), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:24:34,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4219 states to 4219 states and 5542 transitions. [2023-04-02 06:24:34,292 INFO L78 Accepts]: Start accepts. Automaton has 4219 states and 5542 transitions. Word has length 105 [2023-04-02 06:24:34,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:24:34,293 INFO L495 AbstractCegarLoop]: Abstraction has 4219 states and 5542 transitions. [2023-04-02 06:24:34,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 3 states have internal predecessors, (102), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:24:34,293 INFO L276 IsEmpty]: Start isEmpty. Operand 4219 states and 5542 transitions. [2023-04-02 06:24:34,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-04-02 06:24:34,294 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:24:34,295 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:24:34,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-04-02 06:24:34,295 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:24:34,295 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:24:34,295 INFO L85 PathProgramCache]: Analyzing trace with hash 327660393, now seen corresponding path program 1 times [2023-04-02 06:24:34,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:24:34,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291705519] [2023-04-02 06:24:34,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:24:34,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:24:34,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:24:34,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:24:34,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:24:34,425 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-02 06:24:34,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:24:34,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291705519] [2023-04-02 06:24:34,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291705519] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:24:34,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:24:34,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:24:34,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959228938] [2023-04-02 06:24:34,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:24:34,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:24:34,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:24:34,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:24:34,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:24:34,427 INFO L87 Difference]: Start difference. First operand 4219 states and 5542 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 3 states have internal predecessors, (100), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:24:37,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:24:37,417 INFO L93 Difference]: Finished difference Result 8289 states and 10931 transitions. [2023-04-02 06:24:37,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 06:24:37,418 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 3 states have internal predecessors, (100), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 105 [2023-04-02 06:24:37,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:24:37,424 INFO L225 Difference]: With dead ends: 8289 [2023-04-02 06:24:37,424 INFO L226 Difference]: Without dead ends: 4059 [2023-04-02 06:24:37,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:24:37,431 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 0 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 06:24:37,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 238 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 06:24:37,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4059 states. [2023-04-02 06:24:40,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4059 to 4051. [2023-04-02 06:24:40,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4051 states, 4047 states have (on average 1.3073881887818137) internal successors, (5291), 4047 states have internal predecessors, (5291), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:24:40,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4051 states to 4051 states and 5294 transitions. [2023-04-02 06:24:40,180 INFO L78 Accepts]: Start accepts. Automaton has 4051 states and 5294 transitions. Word has length 105 [2023-04-02 06:24:40,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:24:40,180 INFO L495 AbstractCegarLoop]: Abstraction has 4051 states and 5294 transitions. [2023-04-02 06:24:40,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 3 states have internal predecessors, (100), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:24:40,180 INFO L276 IsEmpty]: Start isEmpty. Operand 4051 states and 5294 transitions. [2023-04-02 06:24:40,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-04-02 06:24:40,182 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:24:40,182 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:24:40,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-04-02 06:24:40,182 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:24:40,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:24:40,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1041671459, now seen corresponding path program 1 times [2023-04-02 06:24:40,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:24:40,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646107349] [2023-04-02 06:24:40,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:24:40,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:24:40,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:24:40,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:24:40,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:24:40,842 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:24:40,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:24:40,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646107349] [2023-04-02 06:24:40,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646107349] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 06:24:40,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711488675] [2023-04-02 06:24:40,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:24:40,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 06:24:40,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 06:24:40,846 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) [2023-04-02 06:24:40,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 06:24:41,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:24:41,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 22 conjunts are in the unsatisfiable core [2023-04-02 06:24:41,023 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 06:24:42,215 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:24:42,216 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 06:24:43,388 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:24:43,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711488675] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 06:24:43,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 06:24:43,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 32 [2023-04-02 06:24:43,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882827246] [2023-04-02 06:24:43,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 06:24:43,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-04-02 06:24:43,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:24:43,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-04-02 06:24:43,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2023-04-02 06:24:43,390 INFO L87 Difference]: Start difference. First operand 4051 states and 5294 transitions. Second operand has 32 states, 32 states have (on average 8.21875) internal successors, (263), 30 states have internal predecessors, (263), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 06:25:07,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:25:07,556 INFO L93 Difference]: Finished difference Result 26134 states and 33598 transitions. [2023-04-02 06:25:07,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-04-02 06:25:07,557 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 8.21875) internal successors, (263), 30 states have internal predecessors, (263), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 106 [2023-04-02 06:25:07,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:25:07,585 INFO L225 Difference]: With dead ends: 26134 [2023-04-02 06:25:07,585 INFO L226 Difference]: Without dead ends: 22152 [2023-04-02 06:25:07,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 196 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1405, Invalid=4295, Unknown=0, NotChecked=0, Total=5700 [2023-04-02 06:25:07,597 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 2771 mSDsluCounter, 1073 mSDsCounter, 0 mSdLazyCounter, 1897 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2771 SdHoareTripleChecker+Valid, 1176 SdHoareTripleChecker+Invalid, 1966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:25:07,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2771 Valid, 1176 Invalid, 1966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1897 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-02 06:25:07,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22152 states. [2023-04-02 06:25:15,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22152 to 9844. [2023-04-02 06:25:15,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9844 states, 9840 states have (on average 1.3090447154471545) internal successors, (12881), 9840 states have internal predecessors, (12881), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:25:15,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9844 states to 9844 states and 12884 transitions. [2023-04-02 06:25:15,898 INFO L78 Accepts]: Start accepts. Automaton has 9844 states and 12884 transitions. Word has length 106 [2023-04-02 06:25:15,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:25:15,898 INFO L495 AbstractCegarLoop]: Abstraction has 9844 states and 12884 transitions. [2023-04-02 06:25:15,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 8.21875) internal successors, (263), 30 states have internal predecessors, (263), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 06:25:15,898 INFO L276 IsEmpty]: Start isEmpty. Operand 9844 states and 12884 transitions. [2023-04-02 06:25:15,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-04-02 06:25:15,902 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:25:15,902 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:25:15,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 06:25:16,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-04-02 06:25:16,113 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:25:16,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:25:16,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1775355037, now seen corresponding path program 1 times [2023-04-02 06:25:16,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:25:16,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034413041] [2023-04-02 06:25:16,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:25:16,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:25:16,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:25:17,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:25:17,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:25:17,090 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:25:17,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:25:17,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034413041] [2023-04-02 06:25:17,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034413041] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 06:25:17,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967985533] [2023-04-02 06:25:17,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:25:17,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 06:25:17,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 06:25:17,093 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) [2023-04-02 06:25:17,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 06:25:17,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:25:17,239 INFO L262 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 21 conjunts are in the unsatisfiable core [2023-04-02 06:25:17,243 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 06:25:18,458 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:25:18,458 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 06:25:20,013 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:25:20,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967985533] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 06:25:20,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 06:25:20,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 14, 13] total 46 [2023-04-02 06:25:20,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342053804] [2023-04-02 06:25:20,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 06:25:20,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-04-02 06:25:20,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:25:20,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-04-02 06:25:20,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1923, Unknown=0, NotChecked=0, Total=2070 [2023-04-02 06:25:20,016 INFO L87 Difference]: Start difference. First operand 9844 states and 12884 transitions. Second operand has 46 states, 46 states have (on average 6.130434782608695) internal successors, (282), 45 states have internal predecessors, (282), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2)