/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_15-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 16:14:06,967 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 16:14:06,968 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 16:14:06,993 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-18 16:14:06,993 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-18 16:14:06,994 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-18 16:14:06,995 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-18 16:14:06,996 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-18 16:14:06,998 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-18 16:14:06,998 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-18 16:14:06,999 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-18 16:14:07,000 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-18 16:14:07,001 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 16:14:07,001 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 16:14:07,002 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 16:14:07,003 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 16:14:07,004 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 16:14:07,005 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 16:14:07,006 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 16:14:07,008 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 16:14:07,009 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 16:14:07,010 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 16:14:07,011 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 16:14:07,012 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 16:14:07,012 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 16:14:07,015 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-18 16:14:07,015 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-18 16:14:07,015 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-18 16:14:07,016 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-18 16:14:07,016 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-18 16:14:07,017 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-18 16:14:07,017 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-18 16:14:07,018 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-18 16:14:07,019 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-18 16:14:07,019 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-18 16:14:07,020 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-18 16:14:07,020 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-18 16:14:07,021 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-18 16:14:07,021 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-18 16:14:07,021 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 16:14:07,022 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 16:14:07,023 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 16:14:07,023 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-03-18 16:14:07,041 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 16:14:07,041 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 16:14:07,042 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-18 16:14:07,042 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-18 16:14:07,042 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-18 16:14:07,043 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-18 16:14:07,043 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-18 16:14:07,043 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-18 16:14:07,043 INFO L138 SettingsManager]: * Use SBE=true [2022-03-18 16:14:07,044 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 16:14:07,044 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-18 16:14:07,044 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 16:14:07,044 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-18 16:14:07,044 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 16:14:07,044 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 16:14:07,044 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 16:14:07,045 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 16:14:07,045 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-18 16:14:07,045 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 16:14:07,045 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 16:14:07,045 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 16:14:07,045 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 16:14:07,045 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 16:14:07,046 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 16:14:07,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 16:14:07,046 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 16:14:07,046 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-18 16:14:07,046 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-18 16:14:07,046 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 16:14:07,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-18 16:14:07,047 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-18 16:14:07,047 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-18 16:14:07,047 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 16:14:07,047 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 16:14:07,261 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 16:14:07,282 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 16:14:07,284 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 16:14:07,285 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 16:14:07,285 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 16:14:07,286 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_15-2.c [2022-03-18 16:14:07,342 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fdd93abd/83934563f96845d7bb7e5abdb524f050/FLAG35f46576a [2022-03-18 16:14:07,706 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 16:14:07,707 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_15-2.c [2022-03-18 16:14:07,713 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fdd93abd/83934563f96845d7bb7e5abdb524f050/FLAG35f46576a [2022-03-18 16:14:08,145 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fdd93abd/83934563f96845d7bb7e5abdb524f050 [2022-03-18 16:14:08,149 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 16:14:08,151 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 16:14:08,155 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 16:14:08,156 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 16:14:08,159 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 16:14:08,159 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 04:14:08" (1/1) ... [2022-03-18 16:14:08,160 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d1997cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:14:08, skipping insertion in model container [2022-03-18 16:14:08,160 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 04:14:08" (1/1) ... [2022-03-18 16:14:08,166 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 16:14:08,183 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 16:14:08,352 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_15-2.c[5628,5641] [2022-03-18 16:14:08,354 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 16:14:08,360 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 16:14:08,384 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_15-2.c[5628,5641] [2022-03-18 16:14:08,385 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 16:14:08,395 INFO L208 MainTranslator]: Completed translation [2022-03-18 16:14:08,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:14:08 WrapperNode [2022-03-18 16:14:08,396 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 16:14:08,397 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 16:14:08,397 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 16:14:08,397 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 16:14:08,405 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:14:08" (1/1) ... [2022-03-18 16:14:08,405 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:14:08" (1/1) ... [2022-03-18 16:14:08,410 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:14:08" (1/1) ... [2022-03-18 16:14:08,411 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:14:08" (1/1) ... [2022-03-18 16:14:08,416 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:14:08" (1/1) ... [2022-03-18 16:14:08,421 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:14:08" (1/1) ... [2022-03-18 16:14:08,422 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:14:08" (1/1) ... [2022-03-18 16:14:08,424 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 16:14:08,425 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 16:14:08,425 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 16:14:08,425 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 16:14:08,426 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:14:08" (1/1) ... [2022-03-18 16:14:08,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 16:14:08,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 16:14:08,464 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-18 16:14:08,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-18 16:14:08,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 16:14:08,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 16:14:08,498 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 16:14:08,498 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 16:14:08,498 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 16:14:08,498 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 16:14:08,498 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 16:14:08,498 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 16:14:08,498 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 16:14:08,498 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 16:14:08,499 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 16:14:08,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 16:14:08,499 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 16:14:08,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 16:14:08,499 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 16:14:08,499 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 16:14:08,559 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 16:14:08,561 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 16:14:08,728 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 16:14:08,734 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 16:14:08,734 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-18 16:14:08,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 04:14:08 BoogieIcfgContainer [2022-03-18 16:14:08,736 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 16:14:08,737 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 16:14:08,737 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 16:14:08,740 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 16:14:08,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 04:14:08" (1/3) ... [2022-03-18 16:14:08,741 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21678f7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 04:14:08, skipping insertion in model container [2022-03-18 16:14:08,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:14:08" (2/3) ... [2022-03-18 16:14:08,741 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21678f7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 04:14:08, skipping insertion in model container [2022-03-18 16:14:08,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 04:14:08" (3/3) ... [2022-03-18 16:14:08,743 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_15-2.c [2022-03-18 16:14:08,746 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-18 16:14:08,747 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 16:14:08,784 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 16:14:08,788 INFO L340 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 [2022-03-18 16:14:08,789 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 16:14:08,825 INFO L276 IsEmpty]: Start isEmpty. Operand has 60 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 55 states have internal predecessors, (103), 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) [2022-03-18 16:14:08,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-18 16:14:08,829 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:14:08,829 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:14:08,830 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:14:08,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:14:08,835 INFO L85 PathProgramCache]: Analyzing trace with hash 208658311, now seen corresponding path program 1 times [2022-03-18 16:14:08,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:14:08,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067940085] [2022-03-18 16:14:08,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:14:08,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:14:08,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:09,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 16:14:09,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:09,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 16:14:09,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:14:09,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067940085] [2022-03-18 16:14:09,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067940085] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 16:14:09,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 16:14:09,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 16:14:09,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082457752] [2022-03-18 16:14:09,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 16:14:09,074 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 16:14:09,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:14:09,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 16:14:09,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 16:14:09,106 INFO L87 Difference]: Start difference. First operand has 60 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 55 states have internal predecessors, (103), 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 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 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) [2022-03-18 16:14:09,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:14:09,323 INFO L93 Difference]: Finished difference Result 118 states and 211 transitions. [2022-03-18 16:14:09,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 16:14:09,325 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 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 26 [2022-03-18 16:14:09,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:14:09,333 INFO L225 Difference]: With dead ends: 118 [2022-03-18 16:14:09,333 INFO L226 Difference]: Without dead ends: 103 [2022-03-18 16:14:09,336 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 16:14:09,339 INFO L912 BasicCegarLoop]: 110 mSDtfsCounter, 259 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 16:14:09,340 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 119 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 16:14:09,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-18 16:14:09,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 71. [2022-03-18 16:14:09,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 67 states have (on average 1.8955223880597014) internal successors, (127), 67 states have internal predecessors, (127), 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) [2022-03-18 16:14:09,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 130 transitions. [2022-03-18 16:14:09,376 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 130 transitions. Word has length 26 [2022-03-18 16:14:09,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:14:09,377 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 130 transitions. [2022-03-18 16:14:09,377 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 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) [2022-03-18 16:14:09,377 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 130 transitions. [2022-03-18 16:14:09,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-18 16:14:09,378 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:14:09,378 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:14:09,379 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 16:14:09,379 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:14:09,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:14:09,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1785486395, now seen corresponding path program 1 times [2022-03-18 16:14:09,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:14:09,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381852253] [2022-03-18 16:14:09,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:14:09,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:14:09,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:09,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 16:14:09,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:09,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 16:14:09,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:14:09,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381852253] [2022-03-18 16:14:09,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381852253] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 16:14:09,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 16:14:09,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 16:14:09,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926743640] [2022-03-18 16:14:09,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 16:14:09,463 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 16:14:09,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:14:09,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 16:14:09,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 16:14:09,464 INFO L87 Difference]: Start difference. First operand 71 states and 130 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 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) [2022-03-18 16:14:09,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:14:09,574 INFO L93 Difference]: Finished difference Result 168 states and 313 transitions. [2022-03-18 16:14:09,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 16:14:09,574 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 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 26 [2022-03-18 16:14:09,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:14:09,576 INFO L225 Difference]: With dead ends: 168 [2022-03-18 16:14:09,576 INFO L226 Difference]: Without dead ends: 103 [2022-03-18 16:14:09,577 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 16:14:09,578 INFO L912 BasicCegarLoop]: 128 mSDtfsCounter, 223 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 16:14:09,579 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 135 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 16:14:09,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-18 16:14:09,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2022-03-18 16:14:09,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 97 states have (on average 1.8865979381443299) internal successors, (183), 97 states have internal predecessors, (183), 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) [2022-03-18 16:14:09,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 186 transitions. [2022-03-18 16:14:09,589 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 186 transitions. Word has length 26 [2022-03-18 16:14:09,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:14:09,589 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 186 transitions. [2022-03-18 16:14:09,589 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 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) [2022-03-18 16:14:09,590 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 186 transitions. [2022-03-18 16:14:09,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-18 16:14:09,591 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:14:09,591 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:14:09,591 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 16:14:09,591 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:14:09,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:14:09,592 INFO L85 PathProgramCache]: Analyzing trace with hash -2121315188, now seen corresponding path program 1 times [2022-03-18 16:14:09,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:14:09,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876651796] [2022-03-18 16:14:09,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:14:09,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:14:09,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:09,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 16:14:09,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:09,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 16:14:09,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:14:09,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876651796] [2022-03-18 16:14:09,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876651796] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 16:14:09,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 16:14:09,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 16:14:09,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634683999] [2022-03-18 16:14:09,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 16:14:09,654 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 16:14:09,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:14:09,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 16:14:09,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 16:14:09,655 INFO L87 Difference]: Start difference. First operand 101 states and 186 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2022-03-18 16:14:09,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:14:09,777 INFO L93 Difference]: Finished difference Result 154 states and 280 transitions. [2022-03-18 16:14:09,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 16:14:09,778 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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 27 [2022-03-18 16:14:09,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:14:09,779 INFO L225 Difference]: With dead ends: 154 [2022-03-18 16:14:09,779 INFO L226 Difference]: Without dead ends: 106 [2022-03-18 16:14:09,780 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 16:14:09,781 INFO L912 BasicCegarLoop]: 156 mSDtfsCounter, 196 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 16:14:09,782 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 163 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 16:14:09,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-03-18 16:14:09,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2022-03-18 16:14:09,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 100 states have (on average 1.85) internal successors, (185), 100 states have internal predecessors, (185), 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) [2022-03-18 16:14:09,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 188 transitions. [2022-03-18 16:14:09,792 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 188 transitions. Word has length 27 [2022-03-18 16:14:09,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:14:09,792 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 188 transitions. [2022-03-18 16:14:09,792 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2022-03-18 16:14:09,793 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 188 transitions. [2022-03-18 16:14:09,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-18 16:14:09,793 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:14:09,793 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:14:09,794 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-18 16:14:09,794 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:14:09,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:14:09,794 INFO L85 PathProgramCache]: Analyzing trace with hash 484708366, now seen corresponding path program 1 times [2022-03-18 16:14:09,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:14:09,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063090068] [2022-03-18 16:14:09,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:14:09,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:14:09,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:09,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 16:14:09,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:09,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 16:14:09,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:14:09,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063090068] [2022-03-18 16:14:09,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063090068] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 16:14:09,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 16:14:09,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 16:14:09,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288317778] [2022-03-18 16:14:09,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 16:14:09,854 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 16:14:09,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:14:09,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 16:14:09,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 16:14:09,855 INFO L87 Difference]: Start difference. First operand 104 states and 188 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2022-03-18 16:14:09,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:14:09,978 INFO L93 Difference]: Finished difference Result 292 states and 540 transitions. [2022-03-18 16:14:09,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 16:14:09,979 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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 27 [2022-03-18 16:14:09,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:14:09,981 INFO L225 Difference]: With dead ends: 292 [2022-03-18 16:14:09,982 INFO L226 Difference]: Without dead ends: 197 [2022-03-18 16:14:09,983 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 16:14:09,995 INFO L912 BasicCegarLoop]: 102 mSDtfsCounter, 248 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 16:14:09,995 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 109 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 16:14:09,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-03-18 16:14:10,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 195. [2022-03-18 16:14:10,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 191 states have (on average 1.8534031413612566) internal successors, (354), 191 states have internal predecessors, (354), 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) [2022-03-18 16:14:10,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 357 transitions. [2022-03-18 16:14:10,010 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 357 transitions. Word has length 27 [2022-03-18 16:14:10,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:14:10,011 INFO L478 AbstractCegarLoop]: Abstraction has 195 states and 357 transitions. [2022-03-18 16:14:10,011 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2022-03-18 16:14:10,011 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 357 transitions. [2022-03-18 16:14:10,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-18 16:14:10,012 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:14:10,012 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:14:10,012 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-18 16:14:10,013 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:14:10,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:14:10,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1816114224, now seen corresponding path program 1 times [2022-03-18 16:14:10,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:14:10,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670577785] [2022-03-18 16:14:10,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:14:10,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:14:10,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:10,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 16:14:10,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:10,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 16:14:10,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:14:10,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670577785] [2022-03-18 16:14:10,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670577785] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 16:14:10,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 16:14:10,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 16:14:10,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589696159] [2022-03-18 16:14:10,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 16:14:10,108 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 16:14:10,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:14:10,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 16:14:10,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 16:14:10,109 INFO L87 Difference]: Start difference. First operand 195 states and 357 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2022-03-18 16:14:10,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:14:10,207 INFO L93 Difference]: Finished difference Result 255 states and 467 transitions. [2022-03-18 16:14:10,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 16:14:10,207 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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 27 [2022-03-18 16:14:10,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:14:10,209 INFO L225 Difference]: With dead ends: 255 [2022-03-18 16:14:10,209 INFO L226 Difference]: Without dead ends: 253 [2022-03-18 16:14:10,209 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 16:14:10,210 INFO L912 BasicCegarLoop]: 181 mSDtfsCounter, 161 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 16:14:10,211 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 188 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 16:14:10,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-03-18 16:14:10,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 195. [2022-03-18 16:14:10,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 191 states have (on average 1.8429319371727748) internal successors, (352), 191 states have internal predecessors, (352), 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) [2022-03-18 16:14:10,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 355 transitions. [2022-03-18 16:14:10,223 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 355 transitions. Word has length 27 [2022-03-18 16:14:10,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:14:10,223 INFO L478 AbstractCegarLoop]: Abstraction has 195 states and 355 transitions. [2022-03-18 16:14:10,224 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2022-03-18 16:14:10,224 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 355 transitions. [2022-03-18 16:14:10,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-18 16:14:10,225 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:14:10,225 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:14:10,225 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-18 16:14:10,225 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:14:10,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:14:10,226 INFO L85 PathProgramCache]: Analyzing trace with hash 2141269562, now seen corresponding path program 1 times [2022-03-18 16:14:10,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:14:10,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54558124] [2022-03-18 16:14:10,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:14:10,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:14:10,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:10,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 16:14:10,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:10,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 16:14:10,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:14:10,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54558124] [2022-03-18 16:14:10,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54558124] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 16:14:10,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 16:14:10,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 16:14:10,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128127916] [2022-03-18 16:14:10,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 16:14:10,287 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 16:14:10,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:14:10,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 16:14:10,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 16:14:10,288 INFO L87 Difference]: Start difference. First operand 195 states and 355 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 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) [2022-03-18 16:14:10,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:14:10,383 INFO L93 Difference]: Finished difference Result 371 states and 683 transitions. [2022-03-18 16:14:10,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 16:14:10,384 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 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 28 [2022-03-18 16:14:10,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:14:10,386 INFO L225 Difference]: With dead ends: 371 [2022-03-18 16:14:10,386 INFO L226 Difference]: Without dead ends: 369 [2022-03-18 16:14:10,386 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 16:14:10,387 INFO L912 BasicCegarLoop]: 99 mSDtfsCounter, 239 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 16:14:10,387 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 106 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 16:14:10,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-03-18 16:14:10,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 263. [2022-03-18 16:14:10,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 259 states have (on average 1.83011583011583) internal successors, (474), 259 states have internal predecessors, (474), 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) [2022-03-18 16:14:10,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 477 transitions. [2022-03-18 16:14:10,400 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 477 transitions. Word has length 28 [2022-03-18 16:14:10,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:14:10,400 INFO L478 AbstractCegarLoop]: Abstraction has 263 states and 477 transitions. [2022-03-18 16:14:10,401 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 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) [2022-03-18 16:14:10,401 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 477 transitions. [2022-03-18 16:14:10,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-18 16:14:10,402 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:14:10,402 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:14:10,402 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-18 16:14:10,402 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:14:10,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:14:10,403 INFO L85 PathProgramCache]: Analyzing trace with hash 147124856, now seen corresponding path program 1 times [2022-03-18 16:14:10,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:14:10,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025759180] [2022-03-18 16:14:10,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:14:10,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:14:10,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:10,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 16:14:10,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:10,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 16:14:10,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:14:10,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025759180] [2022-03-18 16:14:10,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025759180] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 16:14:10,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 16:14:10,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 16:14:10,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647703534] [2022-03-18 16:14:10,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 16:14:10,446 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 16:14:10,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:14:10,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 16:14:10,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 16:14:10,447 INFO L87 Difference]: Start difference. First operand 263 states and 477 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 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) [2022-03-18 16:14:10,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:14:10,544 INFO L93 Difference]: Finished difference Result 631 states and 1155 transitions. [2022-03-18 16:14:10,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 16:14:10,545 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 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 28 [2022-03-18 16:14:10,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:14:10,546 INFO L225 Difference]: With dead ends: 631 [2022-03-18 16:14:10,546 INFO L226 Difference]: Without dead ends: 377 [2022-03-18 16:14:10,548 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 16:14:10,548 INFO L912 BasicCegarLoop]: 132 mSDtfsCounter, 211 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 16:14:10,549 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 139 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 16:14:10,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-03-18 16:14:10,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 375. [2022-03-18 16:14:10,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 371 states have (on average 1.8221024258760108) internal successors, (676), 371 states have internal predecessors, (676), 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) [2022-03-18 16:14:10,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 679 transitions. [2022-03-18 16:14:10,560 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 679 transitions. Word has length 28 [2022-03-18 16:14:10,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:14:10,560 INFO L478 AbstractCegarLoop]: Abstraction has 375 states and 679 transitions. [2022-03-18 16:14:10,561 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 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) [2022-03-18 16:14:10,561 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 679 transitions. [2022-03-18 16:14:10,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-18 16:14:10,562 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:14:10,562 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:14:10,562 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-18 16:14:10,563 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:14:10,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:14:10,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1955059427, now seen corresponding path program 1 times [2022-03-18 16:14:10,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:14:10,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390323054] [2022-03-18 16:14:10,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:14:10,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:14:10,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:10,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 16:14:10,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:10,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 16:14:10,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:14:10,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390323054] [2022-03-18 16:14:10,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390323054] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 16:14:10,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 16:14:10,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 16:14:10,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205444602] [2022-03-18 16:14:10,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 16:14:10,612 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 16:14:10,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:14:10,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 16:14:10,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 16:14:10,613 INFO L87 Difference]: Start difference. First operand 375 states and 679 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 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) [2022-03-18 16:14:10,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:14:10,711 INFO L93 Difference]: Finished difference Result 565 states and 1021 transitions. [2022-03-18 16:14:10,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 16:14:10,716 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 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 29 [2022-03-18 16:14:10,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:14:10,719 INFO L225 Difference]: With dead ends: 565 [2022-03-18 16:14:10,719 INFO L226 Difference]: Without dead ends: 383 [2022-03-18 16:14:10,721 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 16:14:10,721 INFO L912 BasicCegarLoop]: 150 mSDtfsCounter, 194 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 16:14:10,722 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 157 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 16:14:10,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-03-18 16:14:10,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 381. [2022-03-18 16:14:10,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 377 states have (on average 1.8037135278514589) internal successors, (680), 377 states have internal predecessors, (680), 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) [2022-03-18 16:14:10,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 683 transitions. [2022-03-18 16:14:10,734 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 683 transitions. Word has length 29 [2022-03-18 16:14:10,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:14:10,734 INFO L478 AbstractCegarLoop]: Abstraction has 381 states and 683 transitions. [2022-03-18 16:14:10,734 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 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) [2022-03-18 16:14:10,734 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 683 transitions. [2022-03-18 16:14:10,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-18 16:14:10,737 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:14:10,737 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:14:10,737 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-18 16:14:10,737 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:14:10,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:14:10,738 INFO L85 PathProgramCache]: Analyzing trace with hash 266115685, now seen corresponding path program 1 times [2022-03-18 16:14:10,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:14:10,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375579441] [2022-03-18 16:14:10,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:14:10,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:14:10,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:10,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 16:14:10,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:10,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 16:14:10,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:14:10,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375579441] [2022-03-18 16:14:10,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375579441] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 16:14:10,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 16:14:10,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 16:14:10,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304885732] [2022-03-18 16:14:10,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 16:14:10,818 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 16:14:10,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:14:10,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 16:14:10,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 16:14:10,819 INFO L87 Difference]: Start difference. First operand 381 states and 683 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 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) [2022-03-18 16:14:10,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:14:10,909 INFO L93 Difference]: Finished difference Result 717 states and 1301 transitions. [2022-03-18 16:14:10,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 16:14:10,909 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 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 29 [2022-03-18 16:14:10,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:14:10,913 INFO L225 Difference]: With dead ends: 717 [2022-03-18 16:14:10,913 INFO L226 Difference]: Without dead ends: 715 [2022-03-18 16:14:10,913 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 16:14:10,914 INFO L912 BasicCegarLoop]: 98 mSDtfsCounter, 232 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 16:14:10,914 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 105 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 16:14:10,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2022-03-18 16:14:10,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 521. [2022-03-18 16:14:10,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 517 states have (on average 1.7794970986460348) internal successors, (920), 517 states have internal predecessors, (920), 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) [2022-03-18 16:14:10,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 923 transitions. [2022-03-18 16:14:10,929 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 923 transitions. Word has length 29 [2022-03-18 16:14:10,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:14:10,929 INFO L478 AbstractCegarLoop]: Abstraction has 521 states and 923 transitions. [2022-03-18 16:14:10,929 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 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) [2022-03-18 16:14:10,929 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 923 transitions. [2022-03-18 16:14:10,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-18 16:14:10,930 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:14:10,930 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:14:10,930 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-18 16:14:10,931 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:14:10,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:14:10,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1728029021, now seen corresponding path program 1 times [2022-03-18 16:14:10,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:14:10,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332253502] [2022-03-18 16:14:10,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:14:10,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:14:10,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:10,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 16:14:10,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:10,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 16:14:10,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:14:10,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332253502] [2022-03-18 16:14:10,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332253502] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 16:14:10,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 16:14:10,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 16:14:10,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144045198] [2022-03-18 16:14:10,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 16:14:10,965 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 16:14:10,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:14:10,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 16:14:10,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 16:14:10,966 INFO L87 Difference]: Start difference. First operand 521 states and 923 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 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) [2022-03-18 16:14:11,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:14:11,060 INFO L93 Difference]: Finished difference Result 1245 states and 2221 transitions. [2022-03-18 16:14:11,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 16:14:11,061 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 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 29 [2022-03-18 16:14:11,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:14:11,064 INFO L225 Difference]: With dead ends: 1245 [2022-03-18 16:14:11,064 INFO L226 Difference]: Without dead ends: 739 [2022-03-18 16:14:11,065 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 16:14:11,066 INFO L912 BasicCegarLoop]: 134 mSDtfsCounter, 205 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 16:14:11,066 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 141 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 16:14:11,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2022-03-18 16:14:11,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 737. [2022-03-18 16:14:11,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 733 states have (on average 1.7735334242837653) internal successors, (1300), 733 states have internal predecessors, (1300), 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) [2022-03-18 16:14:11,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1303 transitions. [2022-03-18 16:14:11,086 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 1303 transitions. Word has length 29 [2022-03-18 16:14:11,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:14:11,087 INFO L478 AbstractCegarLoop]: Abstraction has 737 states and 1303 transitions. [2022-03-18 16:14:11,087 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 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) [2022-03-18 16:14:11,087 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 1303 transitions. [2022-03-18 16:14:11,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-18 16:14:11,088 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:14:11,088 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:14:11,088 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-18 16:14:11,088 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:14:11,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:14:11,089 INFO L85 PathProgramCache]: Analyzing trace with hash -340135571, now seen corresponding path program 1 times [2022-03-18 16:14:11,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:14:11,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993589856] [2022-03-18 16:14:11,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:14:11,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:14:11,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:11,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 16:14:11,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:11,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 16:14:11,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:14:11,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993589856] [2022-03-18 16:14:11,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993589856] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 16:14:11,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 16:14:11,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 16:14:11,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029984104] [2022-03-18 16:14:11,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 16:14:11,121 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 16:14:11,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:14:11,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 16:14:11,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 16:14:11,122 INFO L87 Difference]: Start difference. First operand 737 states and 1303 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 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) [2022-03-18 16:14:11,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:14:11,219 INFO L93 Difference]: Finished difference Result 1105 states and 1949 transitions. [2022-03-18 16:14:11,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 16:14:11,219 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 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 30 [2022-03-18 16:14:11,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:14:11,222 INFO L225 Difference]: With dead ends: 1105 [2022-03-18 16:14:11,222 INFO L226 Difference]: Without dead ends: 747 [2022-03-18 16:14:11,223 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 16:14:11,224 INFO L912 BasicCegarLoop]: 147 mSDtfsCounter, 193 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 16:14:11,224 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 154 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 16:14:11,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2022-03-18 16:14:11,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 745. [2022-03-18 16:14:11,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 741 states have (on average 1.7543859649122806) internal successors, (1300), 741 states have internal predecessors, (1300), 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) [2022-03-18 16:14:11,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1303 transitions. [2022-03-18 16:14:11,244 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1303 transitions. Word has length 30 [2022-03-18 16:14:11,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:14:11,244 INFO L478 AbstractCegarLoop]: Abstraction has 745 states and 1303 transitions. [2022-03-18 16:14:11,244 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 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) [2022-03-18 16:14:11,244 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1303 transitions. [2022-03-18 16:14:11,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-18 16:14:11,246 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:14:11,246 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:14:11,246 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-18 16:14:11,247 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:14:11,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:14:11,247 INFO L85 PathProgramCache]: Analyzing trace with hash -2029079313, now seen corresponding path program 1 times [2022-03-18 16:14:11,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:14:11,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330236587] [2022-03-18 16:14:11,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:14:11,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:14:11,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:11,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 16:14:11,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:11,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 16:14:11,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:14:11,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330236587] [2022-03-18 16:14:11,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330236587] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 16:14:11,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 16:14:11,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 16:14:11,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626718856] [2022-03-18 16:14:11,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 16:14:11,292 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 16:14:11,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:14:11,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 16:14:11,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 16:14:11,293 INFO L87 Difference]: Start difference. First operand 745 states and 1303 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 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) [2022-03-18 16:14:11,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:14:11,401 INFO L93 Difference]: Finished difference Result 1389 states and 2465 transitions. [2022-03-18 16:14:11,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 16:14:11,402 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 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 30 [2022-03-18 16:14:11,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:14:11,407 INFO L225 Difference]: With dead ends: 1389 [2022-03-18 16:14:11,407 INFO L226 Difference]: Without dead ends: 1387 [2022-03-18 16:14:11,407 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 16:14:11,408 INFO L912 BasicCegarLoop]: 97 mSDtfsCounter, 225 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 16:14:11,408 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 104 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 16:14:11,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1387 states. [2022-03-18 16:14:11,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1387 to 1033. [2022-03-18 16:14:11,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 1029 states have (on average 1.7220602526724975) internal successors, (1772), 1029 states have internal predecessors, (1772), 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) [2022-03-18 16:14:11,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 1775 transitions. [2022-03-18 16:14:11,434 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 1775 transitions. Word has length 30 [2022-03-18 16:14:11,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:14:11,435 INFO L478 AbstractCegarLoop]: Abstraction has 1033 states and 1775 transitions. [2022-03-18 16:14:11,435 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 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) [2022-03-18 16:14:11,435 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 1775 transitions. [2022-03-18 16:14:11,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-18 16:14:11,437 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:14:11,437 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:14:11,437 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-18 16:14:11,437 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:14:11,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:14:11,437 INFO L85 PathProgramCache]: Analyzing trace with hash 271743277, now seen corresponding path program 1 times [2022-03-18 16:14:11,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:14:11,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306821650] [2022-03-18 16:14:11,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:14:11,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:14:11,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:11,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 16:14:11,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:11,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 16:14:11,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:14:11,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306821650] [2022-03-18 16:14:11,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306821650] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 16:14:11,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 16:14:11,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 16:14:11,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838189287] [2022-03-18 16:14:11,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 16:14:11,486 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 16:14:11,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:14:11,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 16:14:11,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 16:14:11,487 INFO L87 Difference]: Start difference. First operand 1033 states and 1775 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 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) [2022-03-18 16:14:11,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:14:11,589 INFO L93 Difference]: Finished difference Result 2461 states and 4257 transitions. [2022-03-18 16:14:11,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 16:14:11,590 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 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 30 [2022-03-18 16:14:11,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:14:11,595 INFO L225 Difference]: With dead ends: 2461 [2022-03-18 16:14:11,595 INFO L226 Difference]: Without dead ends: 1451 [2022-03-18 16:14:11,596 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 16:14:11,598 INFO L912 BasicCegarLoop]: 136 mSDtfsCounter, 199 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 16:14:11,598 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 143 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 16:14:11,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2022-03-18 16:14:11,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 1449. [2022-03-18 16:14:11,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1449 states, 1445 states have (on average 1.719031141868512) internal successors, (2484), 1445 states have internal predecessors, (2484), 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) [2022-03-18 16:14:11,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1449 states to 1449 states and 2487 transitions. [2022-03-18 16:14:11,637 INFO L78 Accepts]: Start accepts. Automaton has 1449 states and 2487 transitions. Word has length 30 [2022-03-18 16:14:11,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:14:11,637 INFO L478 AbstractCegarLoop]: Abstraction has 1449 states and 2487 transitions. [2022-03-18 16:14:11,637 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 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) [2022-03-18 16:14:11,637 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states and 2487 transitions. [2022-03-18 16:14:11,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-18 16:14:11,639 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:14:11,639 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:14:11,639 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-03-18 16:14:11,639 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:14:11,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:14:11,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1523263864, now seen corresponding path program 1 times [2022-03-18 16:14:11,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:14:11,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073394292] [2022-03-18 16:14:11,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:14:11,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:14:11,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:11,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 16:14:11,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:11,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 16:14:11,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:14:11,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073394292] [2022-03-18 16:14:11,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073394292] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 16:14:11,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 16:14:11,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 16:14:11,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904383155] [2022-03-18 16:14:11,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 16:14:11,675 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 16:14:11,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:14:11,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 16:14:11,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 16:14:11,675 INFO L87 Difference]: Start difference. First operand 1449 states and 2487 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 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) [2022-03-18 16:14:11,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:14:11,774 INFO L93 Difference]: Finished difference Result 2173 states and 3721 transitions. [2022-03-18 16:14:11,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 16:14:11,774 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 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 31 [2022-03-18 16:14:11,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:14:11,779 INFO L225 Difference]: With dead ends: 2173 [2022-03-18 16:14:11,780 INFO L226 Difference]: Without dead ends: 1467 [2022-03-18 16:14:11,781 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 16:14:11,781 INFO L912 BasicCegarLoop]: 144 mSDtfsCounter, 192 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 16:14:11,782 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 151 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 16:14:11,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1467 states. [2022-03-18 16:14:11,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1467 to 1465. [2022-03-18 16:14:11,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1465 states, 1461 states have (on average 1.700205338809035) internal successors, (2484), 1461 states have internal predecessors, (2484), 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) [2022-03-18 16:14:11,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 2487 transitions. [2022-03-18 16:14:11,820 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 2487 transitions. Word has length 31 [2022-03-18 16:14:11,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:14:11,820 INFO L478 AbstractCegarLoop]: Abstraction has 1465 states and 2487 transitions. [2022-03-18 16:14:11,820 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 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) [2022-03-18 16:14:11,820 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 2487 transitions. [2022-03-18 16:14:11,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-18 16:14:11,821 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:14:11,822 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:14:11,822 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-03-18 16:14:11,822 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:14:11,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:14:11,822 INFO L85 PathProgramCache]: Analyzing trace with hash -165679878, now seen corresponding path program 1 times [2022-03-18 16:14:11,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:14:11,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847555099] [2022-03-18 16:14:11,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:14:11,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:14:11,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:11,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 16:14:11,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:11,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 16:14:11,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:14:11,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847555099] [2022-03-18 16:14:11,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847555099] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 16:14:11,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 16:14:11,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 16:14:11,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098904443] [2022-03-18 16:14:11,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 16:14:11,868 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 16:14:11,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:14:11,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 16:14:11,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 16:14:11,869 INFO L87 Difference]: Start difference. First operand 1465 states and 2487 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 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) [2022-03-18 16:14:11,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:14:11,974 INFO L93 Difference]: Finished difference Result 2701 states and 4665 transitions. [2022-03-18 16:14:11,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 16:14:11,974 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 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 31 [2022-03-18 16:14:11,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:14:11,983 INFO L225 Difference]: With dead ends: 2701 [2022-03-18 16:14:11,983 INFO L226 Difference]: Without dead ends: 2699 [2022-03-18 16:14:11,987 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 16:14:11,987 INFO L912 BasicCegarLoop]: 96 mSDtfsCounter, 218 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 16:14:11,988 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 103 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 16:14:11,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2699 states. [2022-03-18 16:14:12,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2699 to 2057. [2022-03-18 16:14:12,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2057 states, 2053 states have (on average 1.6619581100828056) internal successors, (3412), 2053 states have internal predecessors, (3412), 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) [2022-03-18 16:14:12,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2057 states to 2057 states and 3415 transitions. [2022-03-18 16:14:12,036 INFO L78 Accepts]: Start accepts. Automaton has 2057 states and 3415 transitions. Word has length 31 [2022-03-18 16:14:12,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:14:12,036 INFO L478 AbstractCegarLoop]: Abstraction has 2057 states and 3415 transitions. [2022-03-18 16:14:12,036 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 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) [2022-03-18 16:14:12,036 INFO L276 IsEmpty]: Start isEmpty. Operand 2057 states and 3415 transitions. [2022-03-18 16:14:12,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-18 16:14:12,038 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:14:12,038 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:14:12,039 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-03-18 16:14:12,039 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:14:12,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:14:12,039 INFO L85 PathProgramCache]: Analyzing trace with hash 2135142712, now seen corresponding path program 1 times [2022-03-18 16:14:12,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:14:12,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668516964] [2022-03-18 16:14:12,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:14:12,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:14:12,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:12,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 16:14:12,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:12,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 16:14:12,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:14:12,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668516964] [2022-03-18 16:14:12,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668516964] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 16:14:12,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 16:14:12,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 16:14:12,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463544664] [2022-03-18 16:14:12,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 16:14:12,086 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 16:14:12,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:14:12,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 16:14:12,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 16:14:12,087 INFO L87 Difference]: Start difference. First operand 2057 states and 3415 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 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) [2022-03-18 16:14:12,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:14:12,223 INFO L93 Difference]: Finished difference Result 4877 states and 8153 transitions. [2022-03-18 16:14:12,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 16:14:12,223 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 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 31 [2022-03-18 16:14:12,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:14:12,232 INFO L225 Difference]: With dead ends: 4877 [2022-03-18 16:14:12,232 INFO L226 Difference]: Without dead ends: 2859 [2022-03-18 16:14:12,235 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 16:14:12,235 INFO L912 BasicCegarLoop]: 138 mSDtfsCounter, 193 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 16:14:12,235 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 145 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 16:14:12,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2859 states. [2022-03-18 16:14:12,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2859 to 2857. [2022-03-18 16:14:12,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2857 states, 2853 states have (on average 1.6614090431125133) internal successors, (4740), 2853 states have internal predecessors, (4740), 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) [2022-03-18 16:14:12,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2857 states to 2857 states and 4743 transitions. [2022-03-18 16:14:12,316 INFO L78 Accepts]: Start accepts. Automaton has 2857 states and 4743 transitions. Word has length 31 [2022-03-18 16:14:12,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:14:12,316 INFO L478 AbstractCegarLoop]: Abstraction has 2857 states and 4743 transitions. [2022-03-18 16:14:12,316 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 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) [2022-03-18 16:14:12,316 INFO L276 IsEmpty]: Start isEmpty. Operand 2857 states and 4743 transitions. [2022-03-18 16:14:12,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-18 16:14:12,318 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:14:12,319 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:14:12,319 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-03-18 16:14:12,319 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:14:12,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:14:12,319 INFO L85 PathProgramCache]: Analyzing trace with hash -840895454, now seen corresponding path program 1 times [2022-03-18 16:14:12,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:14:12,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510992968] [2022-03-18 16:14:12,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:14:12,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:14:12,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:12,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 16:14:12,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:12,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 16:14:12,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:14:12,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510992968] [2022-03-18 16:14:12,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510992968] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 16:14:12,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 16:14:12,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 16:14:12,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14416364] [2022-03-18 16:14:12,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 16:14:12,360 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 16:14:12,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:14:12,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 16:14:12,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 16:14:12,360 INFO L87 Difference]: Start difference. First operand 2857 states and 4743 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 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) [2022-03-18 16:14:12,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:14:12,468 INFO L93 Difference]: Finished difference Result 4285 states and 7097 transitions. [2022-03-18 16:14:12,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 16:14:12,468 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 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 32 [2022-03-18 16:14:12,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:14:12,478 INFO L225 Difference]: With dead ends: 4285 [2022-03-18 16:14:12,478 INFO L226 Difference]: Without dead ends: 2891 [2022-03-18 16:14:12,480 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 16:14:12,481 INFO L912 BasicCegarLoop]: 141 mSDtfsCounter, 191 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 16:14:12,481 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 148 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 16:14:12,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2891 states. [2022-03-18 16:14:12,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2891 to 2889. [2022-03-18 16:14:12,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2889 states, 2885 states have (on average 1.6429809358752165) internal successors, (4740), 2885 states have internal predecessors, (4740), 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) [2022-03-18 16:14:12,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2889 states to 2889 states and 4743 transitions. [2022-03-18 16:14:12,550 INFO L78 Accepts]: Start accepts. Automaton has 2889 states and 4743 transitions. Word has length 32 [2022-03-18 16:14:12,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:14:12,550 INFO L478 AbstractCegarLoop]: Abstraction has 2889 states and 4743 transitions. [2022-03-18 16:14:12,550 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 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) [2022-03-18 16:14:12,550 INFO L276 IsEmpty]: Start isEmpty. Operand 2889 states and 4743 transitions. [2022-03-18 16:14:12,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-18 16:14:12,552 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:14:12,553 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:14:12,553 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-03-18 16:14:12,553 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:14:12,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:14:12,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1765128100, now seen corresponding path program 1 times [2022-03-18 16:14:12,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:14:12,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706031832] [2022-03-18 16:14:12,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:14:12,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:14:12,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:12,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 16:14:12,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:12,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 16:14:12,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:14:12,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706031832] [2022-03-18 16:14:12,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706031832] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 16:14:12,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 16:14:12,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 16:14:12,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355046700] [2022-03-18 16:14:12,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 16:14:12,583 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 16:14:12,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:14:12,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 16:14:12,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 16:14:12,584 INFO L87 Difference]: Start difference. First operand 2889 states and 4743 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 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) [2022-03-18 16:14:12,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:14:12,709 INFO L93 Difference]: Finished difference Result 5261 states and 8809 transitions. [2022-03-18 16:14:12,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 16:14:12,709 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 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 32 [2022-03-18 16:14:12,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:14:12,726 INFO L225 Difference]: With dead ends: 5261 [2022-03-18 16:14:12,727 INFO L226 Difference]: Without dead ends: 5259 [2022-03-18 16:14:12,728 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 16:14:12,729 INFO L912 BasicCegarLoop]: 95 mSDtfsCounter, 211 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 16:14:12,729 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 102 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 16:14:12,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5259 states. [2022-03-18 16:14:12,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5259 to 4105. [2022-03-18 16:14:12,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4105 states, 4101 states have (on average 1.6005852231163131) internal successors, (6564), 4101 states have internal predecessors, (6564), 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) [2022-03-18 16:14:12,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4105 states to 4105 states and 6567 transitions. [2022-03-18 16:14:12,851 INFO L78 Accepts]: Start accepts. Automaton has 4105 states and 6567 transitions. Word has length 32 [2022-03-18 16:14:12,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:14:12,851 INFO L478 AbstractCegarLoop]: Abstraction has 4105 states and 6567 transitions. [2022-03-18 16:14:12,852 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 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) [2022-03-18 16:14:12,852 INFO L276 IsEmpty]: Start isEmpty. Operand 4105 states and 6567 transitions. [2022-03-18 16:14:12,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-18 16:14:12,856 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:14:12,856 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:14:12,856 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-03-18 16:14:12,857 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:14:12,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:14:12,857 INFO L85 PathProgramCache]: Analyzing trace with hash -229016606, now seen corresponding path program 1 times [2022-03-18 16:14:12,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:14:12,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054834999] [2022-03-18 16:14:12,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:14:12,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:14:12,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:12,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 16:14:12,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:12,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 16:14:12,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:14:12,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054834999] [2022-03-18 16:14:12,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054834999] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 16:14:12,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 16:14:12,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 16:14:12,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404331003] [2022-03-18 16:14:12,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 16:14:12,885 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 16:14:12,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:14:12,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 16:14:12,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 16:14:12,885 INFO L87 Difference]: Start difference. First operand 4105 states and 6567 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 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) [2022-03-18 16:14:13,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:14:13,037 INFO L93 Difference]: Finished difference Result 9677 states and 15593 transitions. [2022-03-18 16:14:13,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 16:14:13,038 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 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 32 [2022-03-18 16:14:13,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:14:13,054 INFO L225 Difference]: With dead ends: 9677 [2022-03-18 16:14:13,054 INFO L226 Difference]: Without dead ends: 5643 [2022-03-18 16:14:13,061 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 16:14:13,061 INFO L912 BasicCegarLoop]: 140 mSDtfsCounter, 187 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 16:14:13,061 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 147 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 16:14:13,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5643 states. [2022-03-18 16:14:13,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5643 to 5641. [2022-03-18 16:14:13,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5641 states, 5637 states have (on average 1.6015611140677666) internal successors, (9028), 5637 states have internal predecessors, (9028), 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) [2022-03-18 16:14:13,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5641 states to 5641 states and 9031 transitions. [2022-03-18 16:14:13,192 INFO L78 Accepts]: Start accepts. Automaton has 5641 states and 9031 transitions. Word has length 32 [2022-03-18 16:14:13,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:14:13,192 INFO L478 AbstractCegarLoop]: Abstraction has 5641 states and 9031 transitions. [2022-03-18 16:14:13,193 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 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) [2022-03-18 16:14:13,193 INFO L276 IsEmpty]: Start isEmpty. Operand 5641 states and 9031 transitions. [2022-03-18 16:14:13,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-18 16:14:13,197 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:14:13,197 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:14:13,198 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-03-18 16:14:13,198 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:14:13,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:14:13,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1115389939, now seen corresponding path program 1 times [2022-03-18 16:14:13,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:14:13,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407178233] [2022-03-18 16:14:13,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:14:13,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:14:13,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:13,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 16:14:13,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:13,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 16:14:13,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:14:13,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407178233] [2022-03-18 16:14:13,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407178233] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 16:14:13,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 16:14:13,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 16:14:13,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066508780] [2022-03-18 16:14:13,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 16:14:13,223 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 16:14:13,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:14:13,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 16:14:13,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 16:14:13,224 INFO L87 Difference]: Start difference. First operand 5641 states and 9031 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 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) [2022-03-18 16:14:13,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:14:13,356 INFO L93 Difference]: Finished difference Result 8461 states and 13513 transitions. [2022-03-18 16:14:13,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 16:14:13,356 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 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 33 [2022-03-18 16:14:13,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:14:13,367 INFO L225 Difference]: With dead ends: 8461 [2022-03-18 16:14:13,367 INFO L226 Difference]: Without dead ends: 5707 [2022-03-18 16:14:13,373 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 16:14:13,373 INFO L912 BasicCegarLoop]: 138 mSDtfsCounter, 190 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 16:14:13,374 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 145 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 16:14:13,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5707 states. [2022-03-18 16:14:13,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5707 to 5705. [2022-03-18 16:14:13,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5705 states, 5701 states have (on average 1.5835818277495177) internal successors, (9028), 5701 states have internal predecessors, (9028), 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) [2022-03-18 16:14:13,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5705 states to 5705 states and 9031 transitions. [2022-03-18 16:14:13,530 INFO L78 Accepts]: Start accepts. Automaton has 5705 states and 9031 transitions. Word has length 33 [2022-03-18 16:14:13,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:14:13,530 INFO L478 AbstractCegarLoop]: Abstraction has 5705 states and 9031 transitions. [2022-03-18 16:14:13,530 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 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) [2022-03-18 16:14:13,530 INFO L276 IsEmpty]: Start isEmpty. Operand 5705 states and 9031 transitions. [2022-03-18 16:14:13,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-18 16:14:13,535 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:14:13,535 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:14:13,536 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-03-18 16:14:13,536 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:14:13,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:14:13,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1490633615, now seen corresponding path program 1 times [2022-03-18 16:14:13,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:14:13,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146318784] [2022-03-18 16:14:13,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:14:13,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:14:13,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:13,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 16:14:13,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:13,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 16:14:13,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:14:13,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146318784] [2022-03-18 16:14:13,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146318784] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 16:14:13,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 16:14:13,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 16:14:13,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218843863] [2022-03-18 16:14:13,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 16:14:13,562 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 16:14:13,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:14:13,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 16:14:13,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 16:14:13,562 INFO L87 Difference]: Start difference. First operand 5705 states and 9031 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 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) [2022-03-18 16:14:13,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:14:13,706 INFO L93 Difference]: Finished difference Result 10253 states and 16585 transitions. [2022-03-18 16:14:13,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 16:14:13,706 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 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 33 [2022-03-18 16:14:13,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:14:13,727 INFO L225 Difference]: With dead ends: 10253 [2022-03-18 16:14:13,727 INFO L226 Difference]: Without dead ends: 10251 [2022-03-18 16:14:13,733 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 16:14:13,733 INFO L912 BasicCegarLoop]: 94 mSDtfsCounter, 204 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 16:14:13,734 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 101 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 16:14:13,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10251 states. [2022-03-18 16:14:13,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10251 to 8201. [2022-03-18 16:14:13,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8201 states, 8197 states have (on average 1.5386116872026352) internal successors, (12612), 8197 states have internal predecessors, (12612), 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) [2022-03-18 16:14:13,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8201 states to 8201 states and 12615 transitions. [2022-03-18 16:14:13,967 INFO L78 Accepts]: Start accepts. Automaton has 8201 states and 12615 transitions. Word has length 33 [2022-03-18 16:14:13,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:14:13,967 INFO L478 AbstractCegarLoop]: Abstraction has 8201 states and 12615 transitions. [2022-03-18 16:14:13,968 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 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) [2022-03-18 16:14:13,968 INFO L276 IsEmpty]: Start isEmpty. Operand 8201 states and 12615 transitions. [2022-03-18 16:14:13,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-18 16:14:13,976 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:14:13,977 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:14:13,977 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-03-18 16:14:13,977 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:14:13,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:14:13,977 INFO L85 PathProgramCache]: Analyzing trace with hash -503511091, now seen corresponding path program 1 times [2022-03-18 16:14:13,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:14:13,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630985495] [2022-03-18 16:14:13,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:14:13,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:14:13,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:14,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 16:14:14,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:14,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 16:14:14,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:14:14,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630985495] [2022-03-18 16:14:14,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630985495] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 16:14:14,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 16:14:14,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 16:14:14,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555130197] [2022-03-18 16:14:14,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 16:14:14,005 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 16:14:14,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:14:14,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 16:14:14,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 16:14:14,006 INFO L87 Difference]: Start difference. First operand 8201 states and 12615 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 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) [2022-03-18 16:14:14,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:14:14,184 INFO L93 Difference]: Finished difference Result 19213 states and 29769 transitions. [2022-03-18 16:14:14,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 16:14:14,186 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 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 33 [2022-03-18 16:14:14,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:14:14,205 INFO L225 Difference]: With dead ends: 19213 [2022-03-18 16:14:14,205 INFO L226 Difference]: Without dead ends: 11147 [2022-03-18 16:14:14,219 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 16:14:14,220 INFO L912 BasicCegarLoop]: 142 mSDtfsCounter, 181 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 16:14:14,220 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 149 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 16:14:14,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11147 states. [2022-03-18 16:14:14,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11147 to 11145. [2022-03-18 16:14:14,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11145 states, 11141 states have (on average 1.5398976752535678) internal successors, (17156), 11141 states have internal predecessors, (17156), 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) [2022-03-18 16:14:14,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11145 states to 11145 states and 17159 transitions. [2022-03-18 16:14:14,472 INFO L78 Accepts]: Start accepts. Automaton has 11145 states and 17159 transitions. Word has length 33 [2022-03-18 16:14:14,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:14:14,472 INFO L478 AbstractCegarLoop]: Abstraction has 11145 states and 17159 transitions. [2022-03-18 16:14:14,472 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 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) [2022-03-18 16:14:14,472 INFO L276 IsEmpty]: Start isEmpty. Operand 11145 states and 17159 transitions. [2022-03-18 16:14:14,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-18 16:14:14,481 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:14:14,481 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:14:14,482 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-03-18 16:14:14,482 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:14:14,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:14:14,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1034784041, now seen corresponding path program 1 times [2022-03-18 16:14:14,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:14:14,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112657793] [2022-03-18 16:14:14,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:14:14,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:14:14,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:14,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 16:14:14,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:14,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 16:14:14,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:14:14,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112657793] [2022-03-18 16:14:14,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112657793] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 16:14:14,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 16:14:14,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 16:14:14,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182948512] [2022-03-18 16:14:14,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 16:14:14,509 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 16:14:14,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:14:14,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 16:14:14,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 16:14:14,510 INFO L87 Difference]: Start difference. First operand 11145 states and 17159 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 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) [2022-03-18 16:14:14,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:14:14,670 INFO L93 Difference]: Finished difference Result 16717 states and 25673 transitions. [2022-03-18 16:14:14,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 16:14:14,670 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 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 34 [2022-03-18 16:14:14,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:14:14,689 INFO L225 Difference]: With dead ends: 16717 [2022-03-18 16:14:14,689 INFO L226 Difference]: Without dead ends: 11275 [2022-03-18 16:14:14,701 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 16:14:14,702 INFO L912 BasicCegarLoop]: 135 mSDtfsCounter, 189 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 16:14:14,702 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 142 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 16:14:14,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11275 states. [2022-03-18 16:14:14,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11275 to 11273. [2022-03-18 16:14:14,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11273 states, 11269 states have (on average 1.5224066021829799) internal successors, (17156), 11269 states have internal predecessors, (17156), 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) [2022-03-18 16:14:15,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11273 states to 11273 states and 17159 transitions. [2022-03-18 16:14:15,020 INFO L78 Accepts]: Start accepts. Automaton has 11273 states and 17159 transitions. Word has length 34 [2022-03-18 16:14:15,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:14:15,021 INFO L478 AbstractCegarLoop]: Abstraction has 11273 states and 17159 transitions. [2022-03-18 16:14:15,021 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 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) [2022-03-18 16:14:15,021 INFO L276 IsEmpty]: Start isEmpty. Operand 11273 states and 17159 transitions. [2022-03-18 16:14:15,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-18 16:14:15,031 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:14:15,031 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:14:15,031 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-03-18 16:14:15,031 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:14:15,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:14:15,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1571239513, now seen corresponding path program 1 times [2022-03-18 16:14:15,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:14:15,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968156722] [2022-03-18 16:14:15,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:14:15,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:14:15,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:15,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 16:14:15,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:15,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 16:14:15,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:14:15,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968156722] [2022-03-18 16:14:15,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968156722] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 16:14:15,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 16:14:15,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 16:14:15,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209325564] [2022-03-18 16:14:15,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 16:14:15,061 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 16:14:15,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:14:15,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 16:14:15,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 16:14:15,061 INFO L87 Difference]: Start difference. First operand 11273 states and 17159 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 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) [2022-03-18 16:14:15,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:14:15,310 INFO L93 Difference]: Finished difference Result 19981 states and 31113 transitions. [2022-03-18 16:14:15,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 16:14:15,310 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 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 34 [2022-03-18 16:14:15,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:14:15,347 INFO L225 Difference]: With dead ends: 19981 [2022-03-18 16:14:15,348 INFO L226 Difference]: Without dead ends: 19979 [2022-03-18 16:14:15,358 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 16:14:15,358 INFO L912 BasicCegarLoop]: 93 mSDtfsCounter, 197 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 16:14:15,359 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 100 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 16:14:15,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19979 states. [2022-03-18 16:14:15,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19979 to 16393. [2022-03-18 16:14:15,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16393 states, 16389 states have (on average 1.4763560925010677) internal successors, (24196), 16389 states have internal predecessors, (24196), 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) [2022-03-18 16:14:15,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16393 states to 16393 states and 24199 transitions. [2022-03-18 16:14:15,704 INFO L78 Accepts]: Start accepts. Automaton has 16393 states and 24199 transitions. Word has length 34 [2022-03-18 16:14:15,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:14:15,705 INFO L478 AbstractCegarLoop]: Abstraction has 16393 states and 24199 transitions. [2022-03-18 16:14:15,705 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 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) [2022-03-18 16:14:15,705 INFO L276 IsEmpty]: Start isEmpty. Operand 16393 states and 24199 transitions. [2022-03-18 16:14:15,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-18 16:14:15,722 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:14:15,722 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:14:15,722 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-03-18 16:14:15,722 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:14:15,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:14:15,723 INFO L85 PathProgramCache]: Analyzing trace with hash -422905193, now seen corresponding path program 1 times [2022-03-18 16:14:15,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:14:15,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817915888] [2022-03-18 16:14:15,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:14:15,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:14:15,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:15,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 16:14:15,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:15,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 16:14:15,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:14:15,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817915888] [2022-03-18 16:14:15,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817915888] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 16:14:15,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 16:14:15,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 16:14:15,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267765892] [2022-03-18 16:14:15,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 16:14:15,752 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 16:14:15,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:14:15,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 16:14:15,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 16:14:15,752 INFO L87 Difference]: Start difference. First operand 16393 states and 24199 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 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) [2022-03-18 16:14:16,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:14:16,172 INFO L93 Difference]: Finished difference Result 38157 states and 56713 transitions. [2022-03-18 16:14:16,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 16:14:16,172 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 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 34 [2022-03-18 16:14:16,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:14:16,210 INFO L225 Difference]: With dead ends: 38157 [2022-03-18 16:14:16,210 INFO L226 Difference]: Without dead ends: 22027 [2022-03-18 16:14:16,235 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 16:14:16,235 INFO L912 BasicCegarLoop]: 144 mSDtfsCounter, 175 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 16:14:16,236 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 151 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 16:14:16,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22027 states. [2022-03-18 16:14:16,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22027 to 22025. [2022-03-18 16:14:16,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22025 states, 22021 states have (on average 1.4765905272240134) internal successors, (32516), 22021 states have internal predecessors, (32516), 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) [2022-03-18 16:14:16,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22025 states to 22025 states and 32519 transitions. [2022-03-18 16:14:16,651 INFO L78 Accepts]: Start accepts. Automaton has 22025 states and 32519 transitions. Word has length 34 [2022-03-18 16:14:16,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:14:16,651 INFO L478 AbstractCegarLoop]: Abstraction has 22025 states and 32519 transitions. [2022-03-18 16:14:16,651 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 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) [2022-03-18 16:14:16,651 INFO L276 IsEmpty]: Start isEmpty. Operand 22025 states and 32519 transitions. [2022-03-18 16:14:16,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-18 16:14:16,667 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:14:16,667 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:14:16,667 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-03-18 16:14:16,667 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:14:16,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:14:16,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1463999138, now seen corresponding path program 1 times [2022-03-18 16:14:16,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:14:16,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615742159] [2022-03-18 16:14:16,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:14:16,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:14:16,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:16,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 16:14:16,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:16,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 16:14:16,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:14:16,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615742159] [2022-03-18 16:14:16,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615742159] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 16:14:16,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 16:14:16,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 16:14:16,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458951967] [2022-03-18 16:14:16,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 16:14:16,696 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 16:14:16,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:14:16,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 16:14:16,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 16:14:16,697 INFO L87 Difference]: Start difference. First operand 22025 states and 32519 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 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) [2022-03-18 16:14:17,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:14:17,027 INFO L93 Difference]: Finished difference Result 33037 states and 48649 transitions. [2022-03-18 16:14:17,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 16:14:17,027 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 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 35 [2022-03-18 16:14:17,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:14:17,062 INFO L225 Difference]: With dead ends: 33037 [2022-03-18 16:14:17,062 INFO L226 Difference]: Without dead ends: 22283 [2022-03-18 16:14:17,081 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 16:14:17,082 INFO L912 BasicCegarLoop]: 132 mSDtfsCounter, 188 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 16:14:17,084 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 139 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 16:14:17,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22283 states. [2022-03-18 16:14:17,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22283 to 22281. [2022-03-18 16:14:17,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22281 states, 22277 states have (on average 1.4596220316918795) internal successors, (32516), 22277 states have internal predecessors, (32516), 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) [2022-03-18 16:14:17,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22281 states to 22281 states and 32519 transitions. [2022-03-18 16:14:17,664 INFO L78 Accepts]: Start accepts. Automaton has 22281 states and 32519 transitions. Word has length 35 [2022-03-18 16:14:17,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:14:17,664 INFO L478 AbstractCegarLoop]: Abstraction has 22281 states and 32519 transitions. [2022-03-18 16:14:17,664 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 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) [2022-03-18 16:14:17,664 INFO L276 IsEmpty]: Start isEmpty. Operand 22281 states and 32519 transitions. [2022-03-18 16:14:17,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-18 16:14:17,682 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:14:17,682 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:14:17,683 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-03-18 16:14:17,683 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:14:17,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:14:17,683 INFO L85 PathProgramCache]: Analyzing trace with hash -224944604, now seen corresponding path program 1 times [2022-03-18 16:14:17,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:14:17,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313208723] [2022-03-18 16:14:17,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:14:17,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:14:17,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:17,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 16:14:17,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:17,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 16:14:17,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:14:17,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313208723] [2022-03-18 16:14:17,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313208723] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 16:14:17,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 16:14:17,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 16:14:17,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112257682] [2022-03-18 16:14:17,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 16:14:17,707 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 16:14:17,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:14:17,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 16:14:17,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 16:14:17,710 INFO L87 Difference]: Start difference. First operand 22281 states and 32519 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 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) [2022-03-18 16:14:18,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:14:18,222 INFO L93 Difference]: Finished difference Result 65293 states and 94473 transitions. [2022-03-18 16:14:18,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 16:14:18,222 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 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 35 [2022-03-18 16:14:18,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:14:18,289 INFO L225 Difference]: With dead ends: 65293 [2022-03-18 16:14:18,289 INFO L226 Difference]: Without dead ends: 43531 [2022-03-18 16:14:18,324 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 16:14:18,325 INFO L912 BasicCegarLoop]: 110 mSDtfsCounter, 208 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 16:14:18,325 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 117 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 16:14:18,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43531 states. [2022-03-18 16:14:19,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43531 to 43529. [2022-03-18 16:14:19,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43529 states, 43525 states have (on average 1.4234577828834003) internal successors, (61956), 43525 states have internal predecessors, (61956), 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) [2022-03-18 16:14:19,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43529 states to 43529 states and 61959 transitions. [2022-03-18 16:14:19,177 INFO L78 Accepts]: Start accepts. Automaton has 43529 states and 61959 transitions. Word has length 35 [2022-03-18 16:14:19,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:14:19,177 INFO L478 AbstractCegarLoop]: Abstraction has 43529 states and 61959 transitions. [2022-03-18 16:14:19,177 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 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) [2022-03-18 16:14:19,177 INFO L276 IsEmpty]: Start isEmpty. Operand 43529 states and 61959 transitions. [2022-03-18 16:14:19,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-18 16:14:19,208 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:14:19,208 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:14:19,209 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-03-18 16:14:19,210 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:14:19,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:14:19,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1769200102, now seen corresponding path program 1 times [2022-03-18 16:14:19,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:14:19,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315180735] [2022-03-18 16:14:19,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:14:19,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:14:19,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:19,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 16:14:19,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:19,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 16:14:19,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:14:19,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315180735] [2022-03-18 16:14:19,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315180735] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 16:14:19,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 16:14:19,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 16:14:19,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335160955] [2022-03-18 16:14:19,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 16:14:19,237 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 16:14:19,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:14:19,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 16:14:19,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 16:14:19,237 INFO L87 Difference]: Start difference. First operand 43529 states and 61959 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 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) [2022-03-18 16:14:19,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:14:19,866 INFO L93 Difference]: Finished difference Result 49677 states and 73225 transitions. [2022-03-18 16:14:19,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 16:14:19,867 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 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 35 [2022-03-18 16:14:19,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:14:19,931 INFO L225 Difference]: With dead ends: 49677 [2022-03-18 16:14:19,931 INFO L226 Difference]: Without dead ends: 49675 [2022-03-18 16:14:19,944 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 16:14:19,945 INFO L912 BasicCegarLoop]: 149 mSDtfsCounter, 129 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 16:14:19,945 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 156 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 16:14:19,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49675 states. [2022-03-18 16:14:20,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49675 to 43529. [2022-03-18 16:14:20,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43529 states, 43525 states have (on average 1.411694428489374) internal successors, (61444), 43525 states have internal predecessors, (61444), 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) [2022-03-18 16:14:20,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43529 states to 43529 states and 61447 transitions. [2022-03-18 16:14:20,624 INFO L78 Accepts]: Start accepts. Automaton has 43529 states and 61447 transitions. Word has length 35 [2022-03-18 16:14:20,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:14:20,625 INFO L478 AbstractCegarLoop]: Abstraction has 43529 states and 61447 transitions. [2022-03-18 16:14:20,625 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 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) [2022-03-18 16:14:20,625 INFO L276 IsEmpty]: Start isEmpty. Operand 43529 states and 61447 transitions. [2022-03-18 16:14:20,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-18 16:14:20,645 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:14:20,645 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:14:20,646 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-03-18 16:14:20,646 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:14:20,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:14:20,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1616866700, now seen corresponding path program 1 times [2022-03-18 16:14:20,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:14:20,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122041505] [2022-03-18 16:14:20,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:14:20,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:14:20,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:20,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 16:14:20,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:20,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 16:14:20,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:14:20,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122041505] [2022-03-18 16:14:20,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122041505] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 16:14:20,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 16:14:20,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 16:14:20,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812613474] [2022-03-18 16:14:20,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 16:14:20,672 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 16:14:20,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:14:20,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 16:14:20,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 16:14:20,673 INFO L87 Difference]: Start difference. First operand 43529 states and 61447 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 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) [2022-03-18 16:14:21,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:14:21,667 INFO L93 Difference]: Finished difference Result 75277 states and 108553 transitions. [2022-03-18 16:14:21,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 16:14:21,667 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 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 36 [2022-03-18 16:14:21,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:14:21,749 INFO L225 Difference]: With dead ends: 75277 [2022-03-18 16:14:21,749 INFO L226 Difference]: Without dead ends: 75275 [2022-03-18 16:14:21,765 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 16:14:21,766 INFO L912 BasicCegarLoop]: 91 mSDtfsCounter, 183 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 16:14:21,766 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 98 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 16:14:21,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75275 states. [2022-03-18 16:14:22,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75275 to 65033. [2022-03-18 16:14:22,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65033 states, 65029 states have (on average 1.3700349075028064) internal successors, (89092), 65029 states have internal predecessors, (89092), 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) [2022-03-18 16:14:22,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65033 states to 65033 states and 89095 transitions. [2022-03-18 16:14:22,698 INFO L78 Accepts]: Start accepts. Automaton has 65033 states and 89095 transitions. Word has length 36 [2022-03-18 16:14:22,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:14:22,699 INFO L478 AbstractCegarLoop]: Abstraction has 65033 states and 89095 transitions. [2022-03-18 16:14:22,699 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 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) [2022-03-18 16:14:22,699 INFO L276 IsEmpty]: Start isEmpty. Operand 65033 states and 89095 transitions. [2022-03-18 16:14:22,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-18 16:14:22,964 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:14:22,964 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:14:22,964 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-03-18 16:14:22,964 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:14:22,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:14:22,965 INFO L85 PathProgramCache]: Analyzing trace with hash -377278006, now seen corresponding path program 1 times [2022-03-18 16:14:22,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:14:22,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395472550] [2022-03-18 16:14:22,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:14:22,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:14:22,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:23,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 16:14:23,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:23,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 16:14:23,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:14:23,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395472550] [2022-03-18 16:14:23,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395472550] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 16:14:23,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 16:14:23,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 16:14:23,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408095565] [2022-03-18 16:14:23,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 16:14:23,029 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 16:14:23,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:14:23,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 16:14:23,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 16:14:23,030 INFO L87 Difference]: Start difference. First operand 65033 states and 89095 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 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) [2022-03-18 16:14:24,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:14:24,044 INFO L93 Difference]: Finished difference Result 150029 states and 206857 transitions. [2022-03-18 16:14:24,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 16:14:24,044 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 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 36 [2022-03-18 16:14:24,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:14:24,139 INFO L225 Difference]: With dead ends: 150029 [2022-03-18 16:14:24,140 INFO L226 Difference]: Without dead ends: 85515 [2022-03-18 16:14:24,175 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 16:14:24,176 INFO L912 BasicCegarLoop]: 148 mSDtfsCounter, 163 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 16:14:24,176 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 155 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 16:14:24,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85515 states. [2022-03-18 16:14:25,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85515 to 85513. [2022-03-18 16:14:25,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85513 states, 85509 states have (on average 1.3652364078634998) internal successors, (116740), 85509 states have internal predecessors, (116740), 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) [2022-03-18 16:14:25,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85513 states to 85513 states and 116743 transitions. [2022-03-18 16:14:25,560 INFO L78 Accepts]: Start accepts. Automaton has 85513 states and 116743 transitions. Word has length 36 [2022-03-18 16:14:25,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:14:25,561 INFO L478 AbstractCegarLoop]: Abstraction has 85513 states and 116743 transitions. [2022-03-18 16:14:25,561 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 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) [2022-03-18 16:14:25,561 INFO L276 IsEmpty]: Start isEmpty. Operand 85513 states and 116743 transitions. [2022-03-18 16:14:25,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-18 16:14:25,605 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:14:25,605 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:14:25,605 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-03-18 16:14:25,605 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:14:25,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:14:25,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1416524679, now seen corresponding path program 1 times [2022-03-18 16:14:25,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:14:25,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383804463] [2022-03-18 16:14:25,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:14:25,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:14:25,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:25,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 16:14:25,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:25,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 16:14:25,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:14:25,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383804463] [2022-03-18 16:14:25,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383804463] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 16:14:25,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 16:14:25,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 16:14:25,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491901357] [2022-03-18 16:14:25,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 16:14:25,630 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 16:14:25,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:14:25,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 16:14:25,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 16:14:25,630 INFO L87 Difference]: Start difference. First operand 85513 states and 116743 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 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) [2022-03-18 16:14:26,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:14:26,657 INFO L93 Difference]: Finished difference Result 129037 states and 176137 transitions. [2022-03-18 16:14:26,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 16:14:26,657 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 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 37 [2022-03-18 16:14:26,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:14:26,766 INFO L225 Difference]: With dead ends: 129037 [2022-03-18 16:14:26,766 INFO L226 Difference]: Without dead ends: 87051 [2022-03-18 16:14:26,811 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 16:14:26,812 INFO L912 BasicCegarLoop]: 126 mSDtfsCounter, 186 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 16:14:26,812 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 133 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 16:14:26,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87051 states. [2022-03-18 16:14:28,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87051 to 87049. [2022-03-18 16:14:28,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87049 states, 87045 states have (on average 1.3529094146705727) internal successors, (117764), 87045 states have internal predecessors, (117764), 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) [2022-03-18 16:14:28,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87049 states to 87049 states and 117767 transitions. [2022-03-18 16:14:28,288 INFO L78 Accepts]: Start accepts. Automaton has 87049 states and 117767 transitions. Word has length 37 [2022-03-18 16:14:28,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:14:28,288 INFO L478 AbstractCegarLoop]: Abstraction has 87049 states and 117767 transitions. [2022-03-18 16:14:28,288 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 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) [2022-03-18 16:14:28,288 INFO L276 IsEmpty]: Start isEmpty. Operand 87049 states and 117767 transitions. [2022-03-18 16:14:28,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-18 16:14:28,329 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:14:28,329 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:14:28,330 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-03-18 16:14:28,330 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:14:28,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:14:28,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1189498875, now seen corresponding path program 1 times [2022-03-18 16:14:28,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:14:28,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91657509] [2022-03-18 16:14:28,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:14:28,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:14:28,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:28,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 16:14:28,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:28,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 16:14:28,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:14:28,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91657509] [2022-03-18 16:14:28,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91657509] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 16:14:28,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 16:14:28,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 16:14:28,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002212373] [2022-03-18 16:14:28,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 16:14:28,355 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 16:14:28,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:14:28,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 16:14:28,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 16:14:28,356 INFO L87 Difference]: Start difference. First operand 87049 states and 117767 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 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) [2022-03-18 16:14:29,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:14:29,855 INFO L93 Difference]: Finished difference Result 147469 states and 202761 transitions. [2022-03-18 16:14:29,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 16:14:29,855 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 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 37 [2022-03-18 16:14:29,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:14:30,040 INFO L225 Difference]: With dead ends: 147469 [2022-03-18 16:14:30,040 INFO L226 Difference]: Without dead ends: 147467 [2022-03-18 16:14:30,070 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 16:14:30,071 INFO L912 BasicCegarLoop]: 90 mSDtfsCounter, 176 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 16:14:30,071 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 97 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 16:14:30,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147467 states. [2022-03-18 16:14:31,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147467 to 131081. [2022-03-18 16:14:31,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131081 states, 131077 states have (on average 1.312480450422271) internal successors, (172036), 131077 states have internal predecessors, (172036), 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) [2022-03-18 16:14:32,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131081 states to 131081 states and 172039 transitions. [2022-03-18 16:14:32,059 INFO L78 Accepts]: Start accepts. Automaton has 131081 states and 172039 transitions. Word has length 37 [2022-03-18 16:14:32,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:14:32,059 INFO L478 AbstractCegarLoop]: Abstraction has 131081 states and 172039 transitions. [2022-03-18 16:14:32,059 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 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) [2022-03-18 16:14:32,059 INFO L276 IsEmpty]: Start isEmpty. Operand 131081 states and 172039 transitions. [2022-03-18 16:14:32,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-18 16:14:32,137 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:14:32,137 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:14:32,137 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-03-18 16:14:32,137 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:14:32,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:14:32,137 INFO L85 PathProgramCache]: Analyzing trace with hash -804645831, now seen corresponding path program 1 times [2022-03-18 16:14:32,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:14:32,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513001495] [2022-03-18 16:14:32,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:14:32,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:14:32,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:32,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 16:14:32,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:32,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 16:14:32,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:14:32,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513001495] [2022-03-18 16:14:32,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513001495] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 16:14:32,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 16:14:32,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 16:14:32,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338803470] [2022-03-18 16:14:32,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 16:14:32,161 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 16:14:32,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:14:32,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 16:14:32,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 16:14:32,162 INFO L87 Difference]: Start difference. First operand 131081 states and 172039 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 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) [2022-03-18 16:14:33,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:14:33,898 INFO L93 Difference]: Finished difference Result 299021 states and 393225 transitions. [2022-03-18 16:14:33,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 16:14:33,898 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 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 37 [2022-03-18 16:14:33,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:14:34,112 INFO L225 Difference]: With dead ends: 299021 [2022-03-18 16:14:34,113 INFO L226 Difference]: Without dead ends: 169995 [2022-03-18 16:14:34,226 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 16:14:34,227 INFO L912 BasicCegarLoop]: 150 mSDtfsCounter, 157 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 16:14:34,227 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 157 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 16:14:34,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169995 states. [2022-03-18 16:14:36,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169995 to 169993. [2022-03-18 16:14:37,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169993 states, 169989 states have (on average 1.3011900770049827) internal successors, (221188), 169989 states have internal predecessors, (221188), 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) [2022-03-18 16:14:37,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169993 states to 169993 states and 221191 transitions. [2022-03-18 16:14:37,343 INFO L78 Accepts]: Start accepts. Automaton has 169993 states and 221191 transitions. Word has length 37 [2022-03-18 16:14:37,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:14:37,344 INFO L478 AbstractCegarLoop]: Abstraction has 169993 states and 221191 transitions. [2022-03-18 16:14:37,344 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 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) [2022-03-18 16:14:37,344 INFO L276 IsEmpty]: Start isEmpty. Operand 169993 states and 221191 transitions. [2022-03-18 16:14:37,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-18 16:14:37,438 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:14:37,438 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:14:37,438 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-03-18 16:14:37,438 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:14:37,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:14:37,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1780025025, now seen corresponding path program 1 times [2022-03-18 16:14:37,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:14:37,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363538739] [2022-03-18 16:14:37,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:14:37,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:14:37,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:37,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 16:14:37,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:37,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 16:14:37,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:14:37,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363538739] [2022-03-18 16:14:37,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363538739] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 16:14:37,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 16:14:37,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 16:14:37,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525590628] [2022-03-18 16:14:37,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 16:14:37,469 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 16:14:37,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:14:37,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 16:14:37,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 16:14:37,470 INFO L87 Difference]: Start difference. First operand 169993 states and 221191 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 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) [2022-03-18 16:14:39,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:14:39,505 INFO L93 Difference]: Finished difference Result 254989 states and 330761 transitions. [2022-03-18 16:14:39,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 16:14:39,506 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 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 38 [2022-03-18 16:14:39,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:14:39,737 INFO L225 Difference]: With dead ends: 254989 [2022-03-18 16:14:39,737 INFO L226 Difference]: Without dead ends: 172043 [2022-03-18 16:14:39,811 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 16:14:39,811 INFO L912 BasicCegarLoop]: 123 mSDtfsCounter, 185 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 16:14:39,812 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 130 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 16:14:39,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172043 states. [2022-03-18 16:14:42,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172043 to 172041. [2022-03-18 16:14:42,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172041 states, 172037 states have (on average 1.2857001691496597) internal successors, (221188), 172037 states have internal predecessors, (221188), 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) [2022-03-18 16:14:42,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172041 states to 172041 states and 221191 transitions. [2022-03-18 16:14:42,876 INFO L78 Accepts]: Start accepts. Automaton has 172041 states and 221191 transitions. Word has length 38 [2022-03-18 16:14:42,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:14:42,876 INFO L478 AbstractCegarLoop]: Abstraction has 172041 states and 221191 transitions. [2022-03-18 16:14:42,876 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 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) [2022-03-18 16:14:42,876 INFO L276 IsEmpty]: Start isEmpty. Operand 172041 states and 221191 transitions. [2022-03-18 16:14:42,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-18 16:14:42,968 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:14:42,968 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:14:42,969 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-03-18 16:14:42,969 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:14:42,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:14:42,969 INFO L85 PathProgramCache]: Analyzing trace with hash 825998529, now seen corresponding path program 1 times [2022-03-18 16:14:42,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:14:42,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207855823] [2022-03-18 16:14:42,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:14:42,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:14:42,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:42,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 16:14:42,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:42,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 16:14:42,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:14:42,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207855823] [2022-03-18 16:14:42,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207855823] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 16:14:42,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 16:14:42,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 16:14:42,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584334562] [2022-03-18 16:14:42,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 16:14:42,996 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 16:14:42,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:14:42,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 16:14:42,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 16:14:42,997 INFO L87 Difference]: Start difference. First operand 172041 states and 221191 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 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) [2022-03-18 16:14:45,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:14:45,527 INFO L93 Difference]: Finished difference Result 286733 states and 372745 transitions. [2022-03-18 16:14:45,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 16:14:45,527 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 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 38 [2022-03-18 16:14:45,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:14:45,932 INFO L225 Difference]: With dead ends: 286733 [2022-03-18 16:14:45,933 INFO L226 Difference]: Without dead ends: 286731 [2022-03-18 16:14:45,990 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 16:14:45,990 INFO L912 BasicCegarLoop]: 89 mSDtfsCounter, 169 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 16:14:45,990 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 96 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 16:14:46,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286731 states. [2022-03-18 16:14:49,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286731 to 262153. [2022-03-18 16:14:49,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262153 states, 262149 states have (on average 1.2499914170948583) internal successors, (327684), 262149 states have internal predecessors, (327684), 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) [2022-03-18 16:14:50,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262153 states to 262153 states and 327687 transitions. [2022-03-18 16:14:50,184 INFO L78 Accepts]: Start accepts. Automaton has 262153 states and 327687 transitions. Word has length 38 [2022-03-18 16:14:50,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:14:50,184 INFO L478 AbstractCegarLoop]: Abstraction has 262153 states and 327687 transitions. [2022-03-18 16:14:50,184 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 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) [2022-03-18 16:14:50,184 INFO L276 IsEmpty]: Start isEmpty. Operand 262153 states and 327687 transitions. [2022-03-18 16:14:50,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-18 16:14:50,715 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:14:50,715 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:14:50,715 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-03-18 16:14:50,715 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:14:50,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:14:50,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1168146177, now seen corresponding path program 1 times [2022-03-18 16:14:50,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:14:50,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294718260] [2022-03-18 16:14:50,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:14:50,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:14:50,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:50,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 16:14:50,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:14:50,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 16:14:50,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:14:50,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294718260] [2022-03-18 16:14:50,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294718260] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 16:14:50,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 16:14:50,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 16:14:50,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329168321] [2022-03-18 16:14:50,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 16:14:50,741 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 16:14:50,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:14:50,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 16:14:50,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 16:14:50,742 INFO L87 Difference]: Start difference. First operand 262153 states and 327687 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 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) [2022-03-18 16:14:54,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:14:54,743 INFO L93 Difference]: Finished difference Result 593933 states and 741385 transitions. [2022-03-18 16:14:54,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 16:14:54,744 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 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 38 [2022-03-18 16:14:54,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:14:55,254 INFO L225 Difference]: With dead ends: 593933 [2022-03-18 16:14:55,254 INFO L226 Difference]: Without dead ends: 335883 [2022-03-18 16:14:55,818 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 16:14:55,818 INFO L912 BasicCegarLoop]: 152 mSDtfsCounter, 151 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 16:14:55,819 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 159 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 16:14:55,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335883 states. [2022-03-18 16:15:00,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335883 to 335881. [2022-03-18 16:15:00,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335881 states, 335877 states have (on average 1.2317008905045597) internal successors, (413700), 335877 states have internal predecessors, (413700), 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) [2022-03-18 16:15:01,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335881 states to 335881 states and 413703 transitions. [2022-03-18 16:15:01,930 INFO L78 Accepts]: Start accepts. Automaton has 335881 states and 413703 transitions. Word has length 38 [2022-03-18 16:15:01,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:15:01,930 INFO L478 AbstractCegarLoop]: Abstraction has 335881 states and 413703 transitions. [2022-03-18 16:15:01,930 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 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) [2022-03-18 16:15:01,930 INFO L276 IsEmpty]: Start isEmpty. Operand 335881 states and 413703 transitions. [2022-03-18 16:15:02,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-18 16:15:02,105 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:15:02,105 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:15:02,105 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-03-18 16:15:02,106 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:15:02,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:15:02,106 INFO L85 PathProgramCache]: Analyzing trace with hash -163633522, now seen corresponding path program 1 times [2022-03-18 16:15:02,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:15:02,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480301804] [2022-03-18 16:15:02,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:15:02,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:15:02,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:15:02,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 16:15:02,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:15:02,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 16:15:02,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:15:02,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480301804] [2022-03-18 16:15:02,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480301804] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 16:15:02,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 16:15:02,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 16:15:02,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645233077] [2022-03-18 16:15:02,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 16:15:02,132 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 16:15:02,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:15:02,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 16:15:02,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 16:15:02,134 INFO L87 Difference]: Start difference. First operand 335881 states and 413703 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2022-03-18 16:15:05,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:15:05,559 INFO L93 Difference]: Finished difference Result 503821 states and 618505 transitions. [2022-03-18 16:15:05,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 16:15:05,559 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 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 39 [2022-03-18 16:15:05,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:15:06,082 INFO L225 Difference]: With dead ends: 503821 [2022-03-18 16:15:06,082 INFO L226 Difference]: Without dead ends: 339979 [2022-03-18 16:15:06,209 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 16:15:06,210 INFO L912 BasicCegarLoop]: 120 mSDtfsCounter, 184 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 16:15:06,210 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 127 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 16:15:06,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339979 states. [2022-03-18 16:15:11,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339979 to 339977. [2022-03-18 16:15:11,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339977 states, 339973 states have (on average 1.2168613389886844) internal successors, (413700), 339973 states have internal predecessors, (413700), 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) [2022-03-18 16:15:12,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339977 states to 339977 states and 413703 transitions. [2022-03-18 16:15:12,350 INFO L78 Accepts]: Start accepts. Automaton has 339977 states and 413703 transitions. Word has length 39 [2022-03-18 16:15:12,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:15:12,350 INFO L478 AbstractCegarLoop]: Abstraction has 339977 states and 413703 transitions. [2022-03-18 16:15:12,351 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2022-03-18 16:15:12,351 INFO L276 IsEmpty]: Start isEmpty. Operand 339977 states and 413703 transitions. [2022-03-18 16:15:12,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-18 16:15:12,911 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:15:12,912 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:15:12,912 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-03-18 16:15:12,912 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:15:12,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:15:12,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1852577264, now seen corresponding path program 1 times [2022-03-18 16:15:12,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:15:12,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448392349] [2022-03-18 16:15:12,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:15:12,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:15:12,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:15:12,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 16:15:12,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:15:12,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 16:15:12,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:15:12,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448392349] [2022-03-18 16:15:12,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448392349] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 16:15:12,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 16:15:12,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 16:15:12,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39476041] [2022-03-18 16:15:12,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 16:15:12,934 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 16:15:12,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:15:12,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 16:15:12,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 16:15:12,935 INFO L87 Difference]: Start difference. First operand 339977 states and 413703 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2022-03-18 16:15:17,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:15:17,760 INFO L93 Difference]: Finished difference Result 557069 states and 679945 transitions. [2022-03-18 16:15:17,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 16:15:17,767 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 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 39 [2022-03-18 16:15:17,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:15:18,846 INFO L225 Difference]: With dead ends: 557069 [2022-03-18 16:15:18,846 INFO L226 Difference]: Without dead ends: 557067 [2022-03-18 16:15:18,926 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 16:15:18,926 INFO L912 BasicCegarLoop]: 88 mSDtfsCounter, 162 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 16:15:18,927 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 95 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 16:15:19,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557067 states. [2022-03-18 16:15:26,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557067 to 524297. [2022-03-18 16:15:27,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524297 states, 524293 states have (on average 1.1874963045472664) internal successors, (622596), 524293 states have internal predecessors, (622596), 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) [2022-03-18 16:15:29,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524297 states to 524297 states and 622599 transitions. [2022-03-18 16:15:29,472 INFO L78 Accepts]: Start accepts. Automaton has 524297 states and 622599 transitions. Word has length 39 [2022-03-18 16:15:29,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:15:29,472 INFO L478 AbstractCegarLoop]: Abstraction has 524297 states and 622599 transitions. [2022-03-18 16:15:29,472 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2022-03-18 16:15:29,472 INFO L276 IsEmpty]: Start isEmpty. Operand 524297 states and 622599 transitions. [2022-03-18 16:15:30,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-18 16:15:30,336 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:15:30,336 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:15:30,336 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-03-18 16:15:30,336 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:15:30,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:15:30,337 INFO L85 PathProgramCache]: Analyzing trace with hash 448245326, now seen corresponding path program 1 times [2022-03-18 16:15:30,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:15:30,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444831232] [2022-03-18 16:15:30,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:15:30,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:15:30,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:15:30,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 16:15:30,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:15:30,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 16:15:30,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:15:30,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444831232] [2022-03-18 16:15:30,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444831232] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 16:15:30,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 16:15:30,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 16:15:30,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545862543] [2022-03-18 16:15:30,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 16:15:30,360 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 16:15:30,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:15:30,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 16:15:30,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 16:15:30,361 INFO L87 Difference]: Start difference. First operand 524297 states and 622599 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2022-03-18 16:15:37,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:15:37,658 INFO L93 Difference]: Finished difference Result 1179661 states and 1392649 transitions. [2022-03-18 16:15:37,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 16:15:37,659 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 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 39 [2022-03-18 16:15:37,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:15:39,218 INFO L225 Difference]: With dead ends: 1179661 [2022-03-18 16:15:39,218 INFO L226 Difference]: Without dead ends: 663563 [2022-03-18 16:15:39,480 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 16:15:39,480 INFO L912 BasicCegarLoop]: 154 mSDtfsCounter, 145 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 16:15:39,480 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 161 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 16:15:39,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663563 states. [2022-03-18 16:15:51,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663563 to 663561. [2022-03-18 16:15:52,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663561 states, 663557 states have (on average 1.1604911107862625) internal successors, (770052), 663557 states have internal predecessors, (770052), 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) [2022-03-18 16:15:55,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663561 states to 663561 states and 770055 transitions. [2022-03-18 16:15:55,480 INFO L78 Accepts]: Start accepts. Automaton has 663561 states and 770055 transitions. Word has length 39 [2022-03-18 16:15:55,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:15:55,481 INFO L478 AbstractCegarLoop]: Abstraction has 663561 states and 770055 transitions. [2022-03-18 16:15:55,481 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2022-03-18 16:15:55,481 INFO L276 IsEmpty]: Start isEmpty. Operand 663561 states and 770055 transitions. [2022-03-18 16:15:56,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-18 16:15:56,401 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:15:56,401 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:15:56,401 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-03-18 16:15:56,401 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:15:56,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:15:56,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1595104140, now seen corresponding path program 1 times [2022-03-18 16:15:56,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:15:56,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62845142] [2022-03-18 16:15:56,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:15:56,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:15:56,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:15:56,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 16:15:56,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:15:56,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 16:15:56,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:15:56,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62845142] [2022-03-18 16:15:56,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62845142] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 16:15:56,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 16:15:56,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 16:15:56,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579526676] [2022-03-18 16:15:56,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 16:15:56,431 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 16:15:56,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:15:56,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 16:15:56,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 16:15:56,432 INFO L87 Difference]: Start difference. First operand 663561 states and 770055 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 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) [2022-03-18 16:16:05,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:16:05,193 INFO L93 Difference]: Finished difference Result 995341 states and 1150985 transitions. [2022-03-18 16:16:05,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 16:16:05,193 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 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 40 [2022-03-18 16:16:05,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:16:06,490 INFO L225 Difference]: With dead ends: 995341 [2022-03-18 16:16:06,490 INFO L226 Difference]: Without dead ends: 671755 [2022-03-18 16:16:06,716 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 16:16:06,716 INFO L912 BasicCegarLoop]: 117 mSDtfsCounter, 183 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 16:16:06,717 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 124 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 16:16:07,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671755 states. [2022-03-18 16:16:16,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671755 to 671753. [2022-03-18 16:16:17,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671753 states, 671749 states have (on average 1.1463388855063423) internal successors, (770052), 671749 states have internal predecessors, (770052), 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) [2022-03-18 16:16:19,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671753 states to 671753 states and 770055 transitions. [2022-03-18 16:16:19,680 INFO L78 Accepts]: Start accepts. Automaton has 671753 states and 770055 transitions. Word has length 40 [2022-03-18 16:16:19,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:16:19,680 INFO L478 AbstractCegarLoop]: Abstraction has 671753 states and 770055 transitions. [2022-03-18 16:16:19,680 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 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) [2022-03-18 16:16:19,680 INFO L276 IsEmpty]: Start isEmpty. Operand 671753 states and 770055 transitions. [2022-03-18 16:16:20,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-18 16:16:20,533 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:16:20,533 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:16:20,533 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-03-18 16:16:20,533 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:16:20,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:16:20,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1010919414, now seen corresponding path program 1 times [2022-03-18 16:16:20,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:16:20,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522051801] [2022-03-18 16:16:20,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:16:20,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:16:20,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:16:20,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 16:16:20,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:16:20,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 16:16:20,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:16:20,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522051801] [2022-03-18 16:16:20,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522051801] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 16:16:20,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 16:16:20,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 16:16:20,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741973611] [2022-03-18 16:16:20,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 16:16:20,556 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 16:16:20,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:16:20,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 16:16:20,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 16:16:20,557 INFO L87 Difference]: Start difference. First operand 671753 states and 770055 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 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) [2022-03-18 16:16:31,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:16:31,942 INFO L93 Difference]: Finished difference Result 1081355 states and 1228808 transitions. [2022-03-18 16:16:31,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 16:16:31,942 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 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 40 [2022-03-18 16:16:31,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:16:34,142 INFO L225 Difference]: With dead ends: 1081355 [2022-03-18 16:16:34,142 INFO L226 Difference]: Without dead ends: 1081353 [2022-03-18 16:16:34,320 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 16:16:34,320 INFO L912 BasicCegarLoop]: 86 mSDtfsCounter, 154 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 16:16:34,320 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 93 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 16:16:35,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081353 states. [2022-03-18 16:16:48,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081353 to 1048585. [2022-03-18 16:16:49,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1048585 states, 1048581 states have (on average 1.1249984502866255) internal successors, (1179652), 1048581 states have internal predecessors, (1179652), 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) [2022-03-18 16:16:53,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048585 states to 1048585 states and 1179655 transitions. [2022-03-18 16:16:53,637 INFO L78 Accepts]: Start accepts. Automaton has 1048585 states and 1179655 transitions. Word has length 40 [2022-03-18 16:16:53,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:16:53,638 INFO L478 AbstractCegarLoop]: Abstraction has 1048585 states and 1179655 transitions. [2022-03-18 16:16:53,638 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 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) [2022-03-18 16:16:53,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1048585 states and 1179655 transitions. [2022-03-18 16:16:54,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-18 16:16:54,972 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:16:54,972 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:16:54,972 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-03-18 16:16:54,972 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:16:54,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:16:54,972 INFO L85 PathProgramCache]: Analyzing trace with hash -983225292, now seen corresponding path program 1 times [2022-03-18 16:16:54,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:16:54,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46708796] [2022-03-18 16:16:54,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:16:54,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:16:54,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:16:54,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 16:16:54,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:16:54,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 16:16:54,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:16:54,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46708796] [2022-03-18 16:16:54,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46708796] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 16:16:54,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 16:16:54,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 16:16:54,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903542669] [2022-03-18 16:16:54,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 16:16:54,997 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 16:16:54,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:16:54,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 16:16:54,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 16:16:54,997 INFO L87 Difference]: Start difference. First operand 1048585 states and 1179655 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 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)