/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/locks/test_locks_14-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 12:08:58,982 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 12:08:58,984 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 12:08:59,030 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 12:08:59,030 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 12:08:59,032 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 12:08:59,034 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 12:08:59,037 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 12:08:59,038 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 12:08:59,043 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 12:08:59,043 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 12:08:59,045 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 12:08:59,045 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 12:08:59,047 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 12:08:59,048 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 12:08:59,051 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 12:08:59,051 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 12:08:59,052 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 12:08:59,054 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 12:08:59,059 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 12:08:59,061 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 12:08:59,062 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 12:08:59,062 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 12:08:59,063 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 12:08:59,065 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 12:08:59,070 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 12:08:59,077 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 12:08:59,078 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 12:08:59,080 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 12:08:59,080 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-20 12:08:59,109 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 12:08:59,110 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 12:08:59,112 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 12:08:59,112 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 12:08:59,112 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 12:08:59,113 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 12:08:59,113 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 12:08:59,113 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 12:08:59,113 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 12:08:59,114 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 12:08:59,116 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 12:08:59,116 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 12:08:59,116 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 12:08:59,117 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 12:08:59,117 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 12:08:59,117 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 12:08:59,117 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 12:08:59,117 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 12:08:59,117 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 12:08:59,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 12:08:59,117 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 12:08:59,118 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 12:08:59,118 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 12:08:59,118 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 12:08:59,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 12:08:59,118 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 12:08:59,118 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-20 12:08:59,119 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-20 12:08:59,120 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 12:08:59,120 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 12:08:59,325 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 12:08:59,343 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 12:08:59,345 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 12:08:59,346 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 12:08:59,346 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 12:08:59,347 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_14-1.c [2022-03-20 12:08:59,394 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80bde3a31/acf90a259f1b46ec8f77759e55b3b292/FLAG6d293f90c [2022-03-20 12:08:59,727 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 12:08:59,727 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_14-1.c [2022-03-20 12:08:59,734 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80bde3a31/acf90a259f1b46ec8f77759e55b3b292/FLAG6d293f90c [2022-03-20 12:09:00,135 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80bde3a31/acf90a259f1b46ec8f77759e55b3b292 [2022-03-20 12:09:00,137 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 12:09:00,139 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 12:09:00,147 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 12:09:00,148 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 12:09:00,150 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 12:09:00,151 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 12:09:00" (1/1) ... [2022-03-20 12:09:00,152 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34c814d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:09:00, skipping insertion in model container [2022-03-20 12:09:00,152 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 12:09:00" (1/1) ... [2022-03-20 12:09:00,158 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 12:09:00,189 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 12:09:00,354 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_14-1.c[5283,5296] [2022-03-20 12:09:00,357 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 12:09:00,362 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 12:09:00,385 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_14-1.c[5283,5296] [2022-03-20 12:09:00,386 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 12:09:00,404 INFO L208 MainTranslator]: Completed translation [2022-03-20 12:09:00,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:09:00 WrapperNode [2022-03-20 12:09:00,405 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 12:09:00,407 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 12:09:00,407 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 12:09:00,407 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 12:09:00,416 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:09:00" (1/1) ... [2022-03-20 12:09:00,416 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:09:00" (1/1) ... [2022-03-20 12:09:00,422 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:09:00" (1/1) ... [2022-03-20 12:09:00,422 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:09:00" (1/1) ... [2022-03-20 12:09:00,428 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:09:00" (1/1) ... [2022-03-20 12:09:00,434 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:09:00" (1/1) ... [2022-03-20 12:09:00,435 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:09:00" (1/1) ... [2022-03-20 12:09:00,438 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 12:09:00,438 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 12:09:00,439 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 12:09:00,439 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 12:09:00,439 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:09:00" (1/1) ... [2022-03-20 12:09:00,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 12:09:00,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:09:00,473 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) [2022-03-20 12:09:00,482 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 [2022-03-20 12:09:00,508 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 12:09:00,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 12:09:00,509 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 12:09:00,509 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 12:09:00,509 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 12:09:00,509 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 12:09:00,510 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 12:09:00,510 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 12:09:00,510 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 12:09:00,510 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 12:09:00,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 12:09:00,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 12:09:00,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 12:09:00,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 12:09:00,511 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 12:09:00,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 12:09:00,570 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 12:09:00,571 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 12:09:00,868 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 12:09:00,875 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 12:09:00,875 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 12:09:00,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 12:09:00 BoogieIcfgContainer [2022-03-20 12:09:00,877 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 12:09:00,878 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 12:09:00,878 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 12:09:00,879 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 12:09:00,881 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 12:09:00" (1/1) ... [2022-03-20 12:09:00,882 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-03-20 12:09:00,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 12:09:00 BasicIcfg [2022-03-20 12:09:00,901 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 12:09:00,902 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 12:09:00,902 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 12:09:00,910 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 12:09:00,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 12:09:00" (1/4) ... [2022-03-20 12:09:00,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5be4507a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 12:09:00, skipping insertion in model container [2022-03-20 12:09:00,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:09:00" (2/4) ... [2022-03-20 12:09:00,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5be4507a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 12:09:00, skipping insertion in model container [2022-03-20 12:09:00,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 12:09:00" (3/4) ... [2022-03-20 12:09:00,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5be4507a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 12:09:00, skipping insertion in model container [2022-03-20 12:09:00,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 12:09:00" (4/4) ... [2022-03-20 12:09:00,912 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_14-1.cqvasr [2022-03-20 12:09:00,917 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 12:09:00,917 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 12:09:00,952 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 12:09:00,960 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=FINITE_AUTOMATA, 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 [2022-03-20 12:09:00,960 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 12:09:00,974 INFO L276 IsEmpty]: Start isEmpty. Operand has 57 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 52 states have internal predecessors, (97), 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) [2022-03-20 12:09:00,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-20 12:09:00,979 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:09:00,979 INFO L499 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] [2022-03-20 12:09:00,980 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:09:00,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:09:00,984 INFO L85 PathProgramCache]: Analyzing trace with hash 267710119, now seen corresponding path program 1 times [2022-03-20 12:09:00,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:09:00,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378526400] [2022-03-20 12:09:00,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:09:00,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:09:01,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:01,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:09:01,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:01,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:09:01,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:09:01,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378526400] [2022-03-20 12:09:01,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378526400] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:09:01,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:09:01,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:09:01,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944640851] [2022-03-20 12:09:01,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:09:01,201 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:09:01,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:09:01,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:09:01,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:09:01,232 INFO L87 Difference]: Start difference. First operand has 57 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 52 states have internal predecessors, (97), 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 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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) [2022-03-20 12:09:01,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:09:01,411 INFO L93 Difference]: Finished difference Result 112 states and 199 transitions. [2022-03-20 12:09:01,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:09:01,414 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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 25 [2022-03-20 12:09:01,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:09:01,422 INFO L225 Difference]: With dead ends: 112 [2022-03-20 12:09:01,422 INFO L226 Difference]: Without dead ends: 97 [2022-03-20 12:09:01,425 INFO L912 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 [2022-03-20 12:09:01,427 INFO L913 BasicCegarLoop]: 104 mSDtfsCounter, 242 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:09:01,428 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 113 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:09:01,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-20 12:09:01,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 67. [2022-03-20 12:09:01,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 63 states have (on average 1.8888888888888888) internal successors, (119), 63 states have internal predecessors, (119), 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) [2022-03-20 12:09:01,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 122 transitions. [2022-03-20 12:09:01,466 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 122 transitions. Word has length 25 [2022-03-20 12:09:01,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:09:01,466 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 122 transitions. [2022-03-20 12:09:01,467 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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) [2022-03-20 12:09:01,467 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 122 transitions. [2022-03-20 12:09:01,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-20 12:09:01,468 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:09:01,468 INFO L499 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] [2022-03-20 12:09:01,468 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 12:09:01,468 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:09:01,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:09:01,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1621019816, now seen corresponding path program 1 times [2022-03-20 12:09:01,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:09:01,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624140319] [2022-03-20 12:09:01,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:09:01,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:09:01,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:01,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:09:01,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:01,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:09:01,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:09:01,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624140319] [2022-03-20 12:09:01,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624140319] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:09:01,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:09:01,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:09:01,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300053067] [2022-03-20 12:09:01,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:09:01,545 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:09:01,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:09:01,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:09:01,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:09:01,546 INFO L87 Difference]: Start difference. First operand 67 states and 122 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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) [2022-03-20 12:09:01,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:09:01,668 INFO L93 Difference]: Finished difference Result 158 states and 293 transitions. [2022-03-20 12:09:01,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:09:01,669 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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 25 [2022-03-20 12:09:01,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:09:01,675 INFO L225 Difference]: With dead ends: 158 [2022-03-20 12:09:01,675 INFO L226 Difference]: Without dead ends: 97 [2022-03-20 12:09:01,681 INFO L912 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 [2022-03-20 12:09:01,683 INFO L913 BasicCegarLoop]: 120 mSDtfsCounter, 208 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 127 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 [2022-03-20 12:09:01,684 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 127 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:09:01,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-20 12:09:01,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2022-03-20 12:09:01,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 91 states have (on average 1.879120879120879) internal successors, (171), 91 states have internal predecessors, (171), 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) [2022-03-20 12:09:01,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 174 transitions. [2022-03-20 12:09:01,707 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 174 transitions. Word has length 25 [2022-03-20 12:09:01,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:09:01,707 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 174 transitions. [2022-03-20 12:09:01,708 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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) [2022-03-20 12:09:01,708 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 174 transitions. [2022-03-20 12:09:01,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-20 12:09:01,709 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:09:01,709 INFO L499 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] [2022-03-20 12:09:01,709 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 12:09:01,709 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:09:01,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:09:01,710 INFO L85 PathProgramCache]: Analyzing trace with hash -290888810, now seen corresponding path program 1 times [2022-03-20 12:09:01,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:09:01,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733796420] [2022-03-20 12:09:01,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:09:01,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:09:01,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:01,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:09:01,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:01,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:09:01,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:09:01,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733796420] [2022-03-20 12:09:01,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733796420] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:09:01,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:09:01,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:09:01,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302906454] [2022-03-20 12:09:01,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:09:01,809 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:09:01,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:09:01,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:09:01,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:09:01,811 INFO L87 Difference]: Start difference. First operand 95 states and 174 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) [2022-03-20 12:09:01,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:09:01,937 INFO L93 Difference]: Finished difference Result 145 states and 262 transitions. [2022-03-20 12:09:01,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:09:01,938 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 [2022-03-20 12:09:01,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:09:01,941 INFO L225 Difference]: With dead ends: 145 [2022-03-20 12:09:01,941 INFO L226 Difference]: Without dead ends: 100 [2022-03-20 12:09:01,943 INFO L912 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 [2022-03-20 12:09:01,948 INFO L913 BasicCegarLoop]: 146 mSDtfsCounter, 183 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 153 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 [2022-03-20 12:09:01,950 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 153 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:09:01,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-20 12:09:01,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2022-03-20 12:09:01,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 94 states have (on average 1.8404255319148937) internal successors, (173), 94 states have internal predecessors, (173), 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) [2022-03-20 12:09:01,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 176 transitions. [2022-03-20 12:09:01,960 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 176 transitions. Word has length 26 [2022-03-20 12:09:01,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:09:01,960 INFO L478 AbstractCegarLoop]: Abstraction has 98 states and 176 transitions. [2022-03-20 12:09:01,961 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) [2022-03-20 12:09:01,961 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 176 transitions. [2022-03-20 12:09:01,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-20 12:09:01,962 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:09:01,962 INFO L499 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] [2022-03-20 12:09:01,962 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 12:09:01,962 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:09:01,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:09:01,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1287961163, now seen corresponding path program 1 times [2022-03-20 12:09:01,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:09:01,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089533646] [2022-03-20 12:09:01,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:09:01,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:09:01,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:02,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:09:02,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:02,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:09:02,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:09:02,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089533646] [2022-03-20 12:09:02,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089533646] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:09:02,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:09:02,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:09:02,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744984854] [2022-03-20 12:09:02,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:09:02,018 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:09:02,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:09:02,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:09:02,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:09:02,019 INFO L87 Difference]: Start difference. First operand 98 states and 176 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) [2022-03-20 12:09:02,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:09:02,118 INFO L93 Difference]: Finished difference Result 185 states and 337 transitions. [2022-03-20 12:09:02,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:09:02,118 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 [2022-03-20 12:09:02,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:09:02,121 INFO L225 Difference]: With dead ends: 185 [2022-03-20 12:09:02,121 INFO L226 Difference]: Without dead ends: 183 [2022-03-20 12:09:02,121 INFO L912 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 [2022-03-20 12:09:02,129 INFO L913 BasicCegarLoop]: 94 mSDtfsCounter, 229 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 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 [2022-03-20 12:09:02,131 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 101 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:09:02,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-03-20 12:09:02,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 129. [2022-03-20 12:09:02,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 125 states have (on average 1.84) internal successors, (230), 125 states have internal predecessors, (230), 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) [2022-03-20 12:09:02,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 233 transitions. [2022-03-20 12:09:02,147 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 233 transitions. Word has length 26 [2022-03-20 12:09:02,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:09:02,148 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 233 transitions. [2022-03-20 12:09:02,148 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) [2022-03-20 12:09:02,148 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 233 transitions. [2022-03-20 12:09:02,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-20 12:09:02,149 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:09:02,149 INFO L499 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] [2022-03-20 12:09:02,149 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-20 12:09:02,150 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:09:02,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:09:02,150 INFO L85 PathProgramCache]: Analyzing trace with hash 65348534, now seen corresponding path program 1 times [2022-03-20 12:09:02,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:09:02,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571703531] [2022-03-20 12:09:02,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:09:02,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:09:02,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:02,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:09:02,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:02,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:09:02,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:09:02,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571703531] [2022-03-20 12:09:02,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571703531] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:09:02,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:09:02,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:09:02,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974525407] [2022-03-20 12:09:02,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:09:02,205 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:09:02,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:09:02,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:09:02,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:09:02,206 INFO L87 Difference]: Start difference. First operand 129 states and 233 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) [2022-03-20 12:09:02,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:09:02,308 INFO L93 Difference]: Finished difference Result 305 states and 559 transitions. [2022-03-20 12:09:02,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:09:02,309 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 [2022-03-20 12:09:02,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:09:02,313 INFO L225 Difference]: With dead ends: 305 [2022-03-20 12:09:02,313 INFO L226 Difference]: Without dead ends: 185 [2022-03-20 12:09:02,319 INFO L912 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 [2022-03-20 12:09:02,320 INFO L913 BasicCegarLoop]: 122 mSDtfsCounter, 202 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 129 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 [2022-03-20 12:09:02,321 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 129 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:09:02,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-03-20 12:09:02,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 183. [2022-03-20 12:09:02,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 179 states have (on average 1.8324022346368716) internal successors, (328), 179 states have internal predecessors, (328), 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) [2022-03-20 12:09:02,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 331 transitions. [2022-03-20 12:09:02,338 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 331 transitions. Word has length 26 [2022-03-20 12:09:02,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:09:02,339 INFO L478 AbstractCegarLoop]: Abstraction has 183 states and 331 transitions. [2022-03-20 12:09:02,339 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) [2022-03-20 12:09:02,339 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 331 transitions. [2022-03-20 12:09:02,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 12:09:02,340 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:09:02,340 INFO L499 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] [2022-03-20 12:09:02,340 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-20 12:09:02,340 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:09:02,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:09:02,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1272058172, now seen corresponding path program 1 times [2022-03-20 12:09:02,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:09:02,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356151801] [2022-03-20 12:09:02,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:09:02,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:09:02,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:02,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:09:02,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:02,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:09:02,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:09:02,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356151801] [2022-03-20 12:09:02,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356151801] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:09:02,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:09:02,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:09:02,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399047214] [2022-03-20 12:09:02,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:09:02,387 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:09:02,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:09:02,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:09:02,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:09:02,388 INFO L87 Difference]: Start difference. First operand 183 states and 331 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) [2022-03-20 12:09:02,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:09:02,478 INFO L93 Difference]: Finished difference Result 274 states and 494 transitions. [2022-03-20 12:09:02,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:09:02,478 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 [2022-03-20 12:09:02,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:09:02,481 INFO L225 Difference]: With dead ends: 274 [2022-03-20 12:09:02,481 INFO L226 Difference]: Without dead ends: 187 [2022-03-20 12:09:02,485 INFO L912 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 [2022-03-20 12:09:02,486 INFO L913 BasicCegarLoop]: 143 mSDtfsCounter, 182 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 150 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 [2022-03-20 12:09:02,487 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 150 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:09:02,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-03-20 12:09:02,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 185. [2022-03-20 12:09:02,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 181 states have (on average 1.8121546961325967) internal successors, (328), 181 states have internal predecessors, (328), 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) [2022-03-20 12:09:02,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 331 transitions. [2022-03-20 12:09:02,508 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 331 transitions. Word has length 27 [2022-03-20 12:09:02,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:09:02,508 INFO L478 AbstractCegarLoop]: Abstraction has 185 states and 331 transitions. [2022-03-20 12:09:02,508 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) [2022-03-20 12:09:02,509 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 331 transitions. [2022-03-20 12:09:02,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 12:09:02,510 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:09:02,510 INFO L499 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] [2022-03-20 12:09:02,510 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-20 12:09:02,510 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:09:02,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:09:02,511 INFO L85 PathProgramCache]: Analyzing trace with hash 2025836771, now seen corresponding path program 1 times [2022-03-20 12:09:02,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:09:02,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336636530] [2022-03-20 12:09:02,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:09:02,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:09:02,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:02,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:09:02,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:02,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:09:02,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:09:02,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336636530] [2022-03-20 12:09:02,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336636530] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:09:02,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:09:02,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:09:02,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398789331] [2022-03-20 12:09:02,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:09:02,620 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:09:02,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:09:02,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:09:02,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:09:02,621 INFO L87 Difference]: Start difference. First operand 185 states and 331 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) [2022-03-20 12:09:02,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:09:02,715 INFO L93 Difference]: Finished difference Result 349 states and 633 transitions. [2022-03-20 12:09:02,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:09:02,716 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 [2022-03-20 12:09:02,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:09:02,718 INFO L225 Difference]: With dead ends: 349 [2022-03-20 12:09:02,718 INFO L226 Difference]: Without dead ends: 347 [2022-03-20 12:09:02,718 INFO L912 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 [2022-03-20 12:09:02,719 INFO L913 BasicCegarLoop]: 93 mSDtfsCounter, 222 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 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 [2022-03-20 12:09:02,719 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 100 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:09:02,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-03-20 12:09:02,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 249. [2022-03-20 12:09:02,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 245 states have (on average 1.7959183673469388) internal successors, (440), 245 states have internal predecessors, (440), 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) [2022-03-20 12:09:02,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 443 transitions. [2022-03-20 12:09:02,728 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 443 transitions. Word has length 27 [2022-03-20 12:09:02,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:09:02,729 INFO L478 AbstractCegarLoop]: Abstraction has 249 states and 443 transitions. [2022-03-20 12:09:02,729 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) [2022-03-20 12:09:02,729 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 443 transitions. [2022-03-20 12:09:02,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 12:09:02,730 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:09:02,730 INFO L499 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] [2022-03-20 12:09:02,730 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-20 12:09:02,731 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:09:02,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:09:02,731 INFO L85 PathProgramCache]: Analyzing trace with hash -915820828, now seen corresponding path program 1 times [2022-03-20 12:09:02,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:09:02,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256798357] [2022-03-20 12:09:02,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:09:02,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:09:02,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:02,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:09:02,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:02,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:09:02,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:09:02,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256798357] [2022-03-20 12:09:02,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256798357] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:09:02,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:09:02,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:09:02,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900968803] [2022-03-20 12:09:02,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:09:02,770 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:09:02,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:09:02,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:09:02,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:09:02,771 INFO L87 Difference]: Start difference. First operand 249 states and 443 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) [2022-03-20 12:09:02,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:09:02,866 INFO L93 Difference]: Finished difference Result 593 states and 1065 transitions. [2022-03-20 12:09:02,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:09:02,866 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 [2022-03-20 12:09:02,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:09:02,868 INFO L225 Difference]: With dead ends: 593 [2022-03-20 12:09:02,868 INFO L226 Difference]: Without dead ends: 355 [2022-03-20 12:09:02,869 INFO L912 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 [2022-03-20 12:09:02,869 INFO L913 BasicCegarLoop]: 124 mSDtfsCounter, 196 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 131 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 [2022-03-20 12:09:02,870 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 131 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:09:02,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-03-20 12:09:02,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 353. [2022-03-20 12:09:02,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 349 states have (on average 1.7879656160458453) internal successors, (624), 349 states have internal predecessors, (624), 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) [2022-03-20 12:09:02,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 627 transitions. [2022-03-20 12:09:02,881 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 627 transitions. Word has length 27 [2022-03-20 12:09:02,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:09:02,881 INFO L478 AbstractCegarLoop]: Abstraction has 353 states and 627 transitions. [2022-03-20 12:09:02,882 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) [2022-03-20 12:09:02,882 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 627 transitions. [2022-03-20 12:09:02,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 12:09:02,883 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:09:02,883 INFO L499 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] [2022-03-20 12:09:02,883 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-20 12:09:02,883 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:09:02,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:09:02,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1623537198, now seen corresponding path program 1 times [2022-03-20 12:09:02,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:09:02,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686530697] [2022-03-20 12:09:02,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:09:02,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:09:02,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:02,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:09:02,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:02,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:09:02,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:09:02,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686530697] [2022-03-20 12:09:02,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686530697] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:09:02,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:09:02,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:09:02,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9877210] [2022-03-20 12:09:02,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:09:02,930 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:09:02,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:09:02,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:09:02,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:09:02,931 INFO L87 Difference]: Start difference. First operand 353 states and 627 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) [2022-03-20 12:09:03,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:09:03,025 INFO L93 Difference]: Finished difference Result 529 states and 937 transitions. [2022-03-20 12:09:03,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:09:03,026 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 [2022-03-20 12:09:03,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:09:03,029 INFO L225 Difference]: With dead ends: 529 [2022-03-20 12:09:03,029 INFO L226 Difference]: Without dead ends: 359 [2022-03-20 12:09:03,030 INFO L912 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 [2022-03-20 12:09:03,032 INFO L913 BasicCegarLoop]: 140 mSDtfsCounter, 181 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 147 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 [2022-03-20 12:09:03,032 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 147 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:09:03,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-03-20 12:09:03,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 357. [2022-03-20 12:09:03,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 353 states have (on average 1.7677053824362605) internal successors, (624), 353 states have internal predecessors, (624), 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) [2022-03-20 12:09:03,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 627 transitions. [2022-03-20 12:09:03,044 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 627 transitions. Word has length 28 [2022-03-20 12:09:03,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:09:03,045 INFO L478 AbstractCegarLoop]: Abstraction has 357 states and 627 transitions. [2022-03-20 12:09:03,046 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) [2022-03-20 12:09:03,046 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 627 transitions. [2022-03-20 12:09:03,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 12:09:03,049 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:09:03,049 INFO L499 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] [2022-03-20 12:09:03,049 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-20 12:09:03,049 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:09:03,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:09:03,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1674357745, now seen corresponding path program 1 times [2022-03-20 12:09:03,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:09:03,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845997258] [2022-03-20 12:09:03,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:09:03,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:09:03,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:03,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:09:03,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:03,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:09:03,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:09:03,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845997258] [2022-03-20 12:09:03,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845997258] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:09:03,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:09:03,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:09:03,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616361147] [2022-03-20 12:09:03,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:09:03,106 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:09:03,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:09:03,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:09:03,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:09:03,107 INFO L87 Difference]: Start difference. First operand 357 states and 627 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) [2022-03-20 12:09:03,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:09:03,205 INFO L93 Difference]: Finished difference Result 669 states and 1193 transitions. [2022-03-20 12:09:03,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:09:03,205 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 [2022-03-20 12:09:03,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:09:03,209 INFO L225 Difference]: With dead ends: 669 [2022-03-20 12:09:03,209 INFO L226 Difference]: Without dead ends: 667 [2022-03-20 12:09:03,209 INFO L912 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 [2022-03-20 12:09:03,210 INFO L913 BasicCegarLoop]: 92 mSDtfsCounter, 215 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 99 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 [2022-03-20 12:09:03,211 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 99 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:09:03,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-03-20 12:09:03,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 489. [2022-03-20 12:09:03,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 485 states have (on average 1.7402061855670103) internal successors, (844), 485 states have internal predecessors, (844), 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) [2022-03-20 12:09:03,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 847 transitions. [2022-03-20 12:09:03,227 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 847 transitions. Word has length 28 [2022-03-20 12:09:03,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:09:03,228 INFO L478 AbstractCegarLoop]: Abstraction has 489 states and 847 transitions. [2022-03-20 12:09:03,228 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) [2022-03-20 12:09:03,228 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 847 transitions. [2022-03-20 12:09:03,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 12:09:03,229 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:09:03,229 INFO L499 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] [2022-03-20 12:09:03,229 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-20 12:09:03,229 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:09:03,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:09:03,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1267299854, now seen corresponding path program 1 times [2022-03-20 12:09:03,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:09:03,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184228889] [2022-03-20 12:09:03,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:09:03,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:09:03,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:03,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:09:03,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:03,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:09:03,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:09:03,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184228889] [2022-03-20 12:09:03,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184228889] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:09:03,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:09:03,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:09:03,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053634109] [2022-03-20 12:09:03,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:09:03,295 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:09:03,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:09:03,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:09:03,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:09:03,296 INFO L87 Difference]: Start difference. First operand 489 states and 847 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) [2022-03-20 12:09:03,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:09:03,395 INFO L93 Difference]: Finished difference Result 1165 states and 2033 transitions. [2022-03-20 12:09:03,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:09:03,395 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 [2022-03-20 12:09:03,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:09:03,398 INFO L225 Difference]: With dead ends: 1165 [2022-03-20 12:09:03,398 INFO L226 Difference]: Without dead ends: 691 [2022-03-20 12:09:03,399 INFO L912 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 [2022-03-20 12:09:03,400 INFO L913 BasicCegarLoop]: 126 mSDtfsCounter, 190 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:09:03,400 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 133 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:09:03,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2022-03-20 12:09:03,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 689. [2022-03-20 12:09:03,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 685 states have (on average 1.7343065693430657) internal successors, (1188), 685 states have internal predecessors, (1188), 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) [2022-03-20 12:09:03,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 1191 transitions. [2022-03-20 12:09:03,421 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 1191 transitions. Word has length 28 [2022-03-20 12:09:03,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:09:03,421 INFO L478 AbstractCegarLoop]: Abstraction has 689 states and 1191 transitions. [2022-03-20 12:09:03,422 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) [2022-03-20 12:09:03,422 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 1191 transitions. [2022-03-20 12:09:03,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 12:09:03,423 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:09:03,423 INFO L499 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] [2022-03-20 12:09:03,423 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-20 12:09:03,423 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:09:03,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:09:03,424 INFO L85 PathProgramCache]: Analyzing trace with hash 365515008, now seen corresponding path program 1 times [2022-03-20 12:09:03,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:09:03,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961724537] [2022-03-20 12:09:03,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:09:03,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:09:03,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:03,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:09:03,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:03,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:09:03,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:09:03,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961724537] [2022-03-20 12:09:03,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961724537] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:09:03,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:09:03,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:09:03,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785834655] [2022-03-20 12:09:03,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:09:03,471 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:09:03,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:09:03,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:09:03,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:09:03,471 INFO L87 Difference]: Start difference. First operand 689 states and 1191 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) [2022-03-20 12:09:03,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:09:03,557 INFO L93 Difference]: Finished difference Result 1033 states and 1781 transitions. [2022-03-20 12:09:03,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:09:03,557 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 [2022-03-20 12:09:03,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:09:03,560 INFO L225 Difference]: With dead ends: 1033 [2022-03-20 12:09:03,560 INFO L226 Difference]: Without dead ends: 699 [2022-03-20 12:09:03,561 INFO L912 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 [2022-03-20 12:09:03,562 INFO L913 BasicCegarLoop]: 137 mSDtfsCounter, 180 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 144 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 [2022-03-20 12:09:03,562 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 144 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:09:03,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2022-03-20 12:09:03,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 697. [2022-03-20 12:09:03,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 693 states have (on average 1.7142857142857142) internal successors, (1188), 693 states have internal predecessors, (1188), 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) [2022-03-20 12:09:03,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1191 transitions. [2022-03-20 12:09:03,581 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1191 transitions. Word has length 29 [2022-03-20 12:09:03,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:09:03,582 INFO L478 AbstractCegarLoop]: Abstraction has 697 states and 1191 transitions. [2022-03-20 12:09:03,582 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) [2022-03-20 12:09:03,582 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1191 transitions. [2022-03-20 12:09:03,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 12:09:03,583 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:09:03,583 INFO L499 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] [2022-03-20 12:09:03,584 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-20 12:09:03,584 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:09:03,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:09:03,584 INFO L85 PathProgramCache]: Analyzing trace with hash -631557345, now seen corresponding path program 1 times [2022-03-20 12:09:03,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:09:03,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728060949] [2022-03-20 12:09:03,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:09:03,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:09:03,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:03,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:09:03,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:03,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:09:03,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:09:03,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728060949] [2022-03-20 12:09:03,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728060949] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:09:03,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:09:03,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:09:03,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193767872] [2022-03-20 12:09:03,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:09:03,623 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:09:03,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:09:03,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:09:03,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:09:03,624 INFO L87 Difference]: Start difference. First operand 697 states and 1191 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) [2022-03-20 12:09:03,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:09:03,719 INFO L93 Difference]: Finished difference Result 1293 states and 2249 transitions. [2022-03-20 12:09:03,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:09:03,719 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 [2022-03-20 12:09:03,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:09:03,724 INFO L225 Difference]: With dead ends: 1293 [2022-03-20 12:09:03,725 INFO L226 Difference]: Without dead ends: 1291 [2022-03-20 12:09:03,725 INFO L912 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 [2022-03-20 12:09:03,726 INFO L913 BasicCegarLoop]: 91 mSDtfsCounter, 208 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 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 [2022-03-20 12:09:03,726 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 98 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:09:03,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1291 states. [2022-03-20 12:09:03,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1291 to 969. [2022-03-20 12:09:03,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 965 states have (on average 1.6787564766839378) internal successors, (1620), 965 states have internal predecessors, (1620), 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) [2022-03-20 12:09:03,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 1623 transitions. [2022-03-20 12:09:03,758 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 1623 transitions. Word has length 29 [2022-03-20 12:09:03,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:09:03,758 INFO L478 AbstractCegarLoop]: Abstraction has 969 states and 1623 transitions. [2022-03-20 12:09:03,759 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) [2022-03-20 12:09:03,759 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 1623 transitions. [2022-03-20 12:09:03,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 12:09:03,761 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:09:03,761 INFO L499 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] [2022-03-20 12:09:03,761 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-03-20 12:09:03,761 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:09:03,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:09:03,762 INFO L85 PathProgramCache]: Analyzing trace with hash 721752352, now seen corresponding path program 1 times [2022-03-20 12:09:03,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:09:03,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304505357] [2022-03-20 12:09:03,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:09:03,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:09:03,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:03,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:09:03,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:03,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:09:03,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:09:03,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304505357] [2022-03-20 12:09:03,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304505357] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:09:03,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:09:03,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:09:03,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594158893] [2022-03-20 12:09:03,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:09:03,810 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:09:03,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:09:03,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:09:03,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:09:03,811 INFO L87 Difference]: Start difference. First operand 969 states and 1623 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) [2022-03-20 12:09:03,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:09:03,910 INFO L93 Difference]: Finished difference Result 2301 states and 3881 transitions. [2022-03-20 12:09:03,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:09:03,911 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 [2022-03-20 12:09:03,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:09:03,916 INFO L225 Difference]: With dead ends: 2301 [2022-03-20 12:09:03,916 INFO L226 Difference]: Without dead ends: 1355 [2022-03-20 12:09:03,919 INFO L912 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 [2022-03-20 12:09:03,919 INFO L913 BasicCegarLoop]: 128 mSDtfsCounter, 184 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 135 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 [2022-03-20 12:09:03,920 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 135 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:09:03,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2022-03-20 12:09:03,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 1353. [2022-03-20 12:09:03,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1353 states, 1349 states have (on average 1.67531504818384) internal successors, (2260), 1349 states have internal predecessors, (2260), 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) [2022-03-20 12:09:03,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1353 states to 1353 states and 2263 transitions. [2022-03-20 12:09:03,986 INFO L78 Accepts]: Start accepts. Automaton has 1353 states and 2263 transitions. Word has length 29 [2022-03-20 12:09:03,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:09:03,986 INFO L478 AbstractCegarLoop]: Abstraction has 1353 states and 2263 transitions. [2022-03-20 12:09:03,986 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) [2022-03-20 12:09:03,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1353 states and 2263 transitions. [2022-03-20 12:09:03,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 12:09:03,988 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:09:03,988 INFO L499 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] [2022-03-20 12:09:03,988 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-03-20 12:09:03,988 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:09:03,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:09:03,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1896591374, now seen corresponding path program 1 times [2022-03-20 12:09:03,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:09:03,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594222641] [2022-03-20 12:09:03,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:09:03,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:09:03,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:04,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:09:04,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:04,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:09:04,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:09:04,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594222641] [2022-03-20 12:09:04,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594222641] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:09:04,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:09:04,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:09:04,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124372158] [2022-03-20 12:09:04,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:09:04,022 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:09:04,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:09:04,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:09:04,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:09:04,023 INFO L87 Difference]: Start difference. First operand 1353 states and 2263 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) [2022-03-20 12:09:04,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:09:04,115 INFO L93 Difference]: Finished difference Result 2029 states and 3385 transitions. [2022-03-20 12:09:04,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:09:04,115 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 [2022-03-20 12:09:04,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:09:04,120 INFO L225 Difference]: With dead ends: 2029 [2022-03-20 12:09:04,120 INFO L226 Difference]: Without dead ends: 1371 [2022-03-20 12:09:04,123 INFO L912 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 [2022-03-20 12:09:04,124 INFO L913 BasicCegarLoop]: 134 mSDtfsCounter, 179 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 141 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 [2022-03-20 12:09:04,124 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 141 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:09:04,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2022-03-20 12:09:04,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1369. [2022-03-20 12:09:04,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 1365 states have (on average 1.6556776556776556) internal successors, (2260), 1365 states have internal predecessors, (2260), 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) [2022-03-20 12:09:04,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 2263 transitions. [2022-03-20 12:09:04,165 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 2263 transitions. Word has length 30 [2022-03-20 12:09:04,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:09:04,166 INFO L478 AbstractCegarLoop]: Abstraction has 1369 states and 2263 transitions. [2022-03-20 12:09:04,166 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) [2022-03-20 12:09:04,166 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 2263 transitions. [2022-03-20 12:09:04,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 12:09:04,167 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:09:04,168 INFO L499 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] [2022-03-20 12:09:04,168 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-03-20 12:09:04,168 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:09:04,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:09:04,168 INFO L85 PathProgramCache]: Analyzing trace with hash 899519021, now seen corresponding path program 1 times [2022-03-20 12:09:04,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:09:04,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447240789] [2022-03-20 12:09:04,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:09:04,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:09:04,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:04,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:09:04,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:04,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:09:04,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:09:04,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447240789] [2022-03-20 12:09:04,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447240789] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:09:04,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:09:04,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:09:04,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670540625] [2022-03-20 12:09:04,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:09:04,220 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:09:04,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:09:04,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:09:04,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:09:04,221 INFO L87 Difference]: Start difference. First operand 1369 states and 2263 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) [2022-03-20 12:09:04,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:09:04,318 INFO L93 Difference]: Finished difference Result 2509 states and 4233 transitions. [2022-03-20 12:09:04,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:09:04,319 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 [2022-03-20 12:09:04,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:09:04,328 INFO L225 Difference]: With dead ends: 2509 [2022-03-20 12:09:04,328 INFO L226 Difference]: Without dead ends: 2507 [2022-03-20 12:09:04,329 INFO L912 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 [2022-03-20 12:09:04,330 INFO L913 BasicCegarLoop]: 90 mSDtfsCounter, 201 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 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, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:09:04,330 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 97 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:09:04,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2507 states. [2022-03-20 12:09:04,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2507 to 1929. [2022-03-20 12:09:04,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1929 states, 1925 states have (on average 1.6145454545454545) internal successors, (3108), 1925 states have internal predecessors, (3108), 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) [2022-03-20 12:09:04,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1929 states to 1929 states and 3111 transitions. [2022-03-20 12:09:04,382 INFO L78 Accepts]: Start accepts. Automaton has 1929 states and 3111 transitions. Word has length 30 [2022-03-20 12:09:04,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:09:04,382 INFO L478 AbstractCegarLoop]: Abstraction has 1929 states and 3111 transitions. [2022-03-20 12:09:04,383 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) [2022-03-20 12:09:04,383 INFO L276 IsEmpty]: Start isEmpty. Operand 1929 states and 3111 transitions. [2022-03-20 12:09:04,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 12:09:04,385 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:09:04,385 INFO L499 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] [2022-03-20 12:09:04,385 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-03-20 12:09:04,385 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:09:04,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:09:04,386 INFO L85 PathProgramCache]: Analyzing trace with hash -2042138578, now seen corresponding path program 1 times [2022-03-20 12:09:04,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:09:04,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695254711] [2022-03-20 12:09:04,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:09:04,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:09:04,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:04,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:09:04,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:04,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:09:04,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:09:04,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695254711] [2022-03-20 12:09:04,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695254711] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:09:04,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:09:04,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:09:04,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971366863] [2022-03-20 12:09:04,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:09:04,427 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:09:04,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:09:04,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:09:04,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:09:04,428 INFO L87 Difference]: Start difference. First operand 1929 states and 3111 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) [2022-03-20 12:09:04,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:09:04,533 INFO L93 Difference]: Finished difference Result 4557 states and 7401 transitions. [2022-03-20 12:09:04,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:09:04,534 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 [2022-03-20 12:09:04,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:09:04,543 INFO L225 Difference]: With dead ends: 4557 [2022-03-20 12:09:04,543 INFO L226 Difference]: Without dead ends: 2667 [2022-03-20 12:09:04,547 INFO L912 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 [2022-03-20 12:09:04,548 INFO L913 BasicCegarLoop]: 130 mSDtfsCounter, 178 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 137 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 [2022-03-20 12:09:04,548 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 137 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:09:04,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2667 states. [2022-03-20 12:09:04,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2667 to 2665. [2022-03-20 12:09:04,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2665 states, 2661 states have (on average 1.6129274708756107) internal successors, (4292), 2661 states have internal predecessors, (4292), 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) [2022-03-20 12:09:04,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2665 states to 2665 states and 4295 transitions. [2022-03-20 12:09:04,619 INFO L78 Accepts]: Start accepts. Automaton has 2665 states and 4295 transitions. Word has length 30 [2022-03-20 12:09:04,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:09:04,619 INFO L478 AbstractCegarLoop]: Abstraction has 2665 states and 4295 transitions. [2022-03-20 12:09:04,620 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) [2022-03-20 12:09:04,620 INFO L276 IsEmpty]: Start isEmpty. Operand 2665 states and 4295 transitions. [2022-03-20 12:09:04,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-20 12:09:04,622 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:09:04,622 INFO L499 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] [2022-03-20 12:09:04,623 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-03-20 12:09:04,623 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:09:04,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:09:04,623 INFO L85 PathProgramCache]: Analyzing trace with hash 2115318588, now seen corresponding path program 1 times [2022-03-20 12:09:04,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:09:04,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342653961] [2022-03-20 12:09:04,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:09:04,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:09:04,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:04,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:09:04,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:04,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:09:04,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:09:04,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342653961] [2022-03-20 12:09:04,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342653961] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:09:04,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:09:04,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:09:04,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148374839] [2022-03-20 12:09:04,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:09:04,668 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:09:04,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:09:04,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:09:04,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:09:04,668 INFO L87 Difference]: Start difference. First operand 2665 states and 4295 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) [2022-03-20 12:09:04,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:09:04,775 INFO L93 Difference]: Finished difference Result 3997 states and 6425 transitions. [2022-03-20 12:09:04,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:09:04,775 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 [2022-03-20 12:09:04,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:09:04,784 INFO L225 Difference]: With dead ends: 3997 [2022-03-20 12:09:04,785 INFO L226 Difference]: Without dead ends: 2699 [2022-03-20 12:09:04,788 INFO L912 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 [2022-03-20 12:09:04,789 INFO L913 BasicCegarLoop]: 131 mSDtfsCounter, 178 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 138 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 [2022-03-20 12:09:04,789 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 138 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:09:04,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2699 states. [2022-03-20 12:09:04,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2699 to 2697. [2022-03-20 12:09:04,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2697 states, 2693 states have (on average 1.5937616041589306) internal successors, (4292), 2693 states have internal predecessors, (4292), 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) [2022-03-20 12:09:04,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2697 states to 2697 states and 4295 transitions. [2022-03-20 12:09:04,889 INFO L78 Accepts]: Start accepts. Automaton has 2697 states and 4295 transitions. Word has length 31 [2022-03-20 12:09:04,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:09:04,890 INFO L478 AbstractCegarLoop]: Abstraction has 2697 states and 4295 transitions. [2022-03-20 12:09:04,890 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) [2022-03-20 12:09:04,890 INFO L276 IsEmpty]: Start isEmpty. Operand 2697 states and 4295 transitions. [2022-03-20 12:09:04,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-20 12:09:04,892 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:09:04,892 INFO L499 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] [2022-03-20 12:09:04,892 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-03-20 12:09:04,893 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:09:04,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:09:04,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1118246235, now seen corresponding path program 1 times [2022-03-20 12:09:04,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:09:04,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709080562] [2022-03-20 12:09:04,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:09:04,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:09:04,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:04,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:09:04,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:04,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:09:04,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:09:04,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709080562] [2022-03-20 12:09:04,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709080562] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:09:04,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:09:04,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:09:04,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752360960] [2022-03-20 12:09:04,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:09:04,931 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:09:04,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:09:04,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:09:04,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:09:04,932 INFO L87 Difference]: Start difference. First operand 2697 states and 4295 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) [2022-03-20 12:09:05,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:09:05,046 INFO L93 Difference]: Finished difference Result 4877 states and 7945 transitions. [2022-03-20 12:09:05,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:09:05,046 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 [2022-03-20 12:09:05,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:09:05,063 INFO L225 Difference]: With dead ends: 4877 [2022-03-20 12:09:05,063 INFO L226 Difference]: Without dead ends: 4875 [2022-03-20 12:09:05,065 INFO L912 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 [2022-03-20 12:09:05,066 INFO L913 BasicCegarLoop]: 89 mSDtfsCounter, 194 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 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 [2022-03-20 12:09:05,067 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 96 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:09:05,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4875 states. [2022-03-20 12:09:05,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4875 to 3849. [2022-03-20 12:09:05,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3849 states, 3845 states have (on average 1.5490247074122236) internal successors, (5956), 3845 states have internal predecessors, (5956), 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) [2022-03-20 12:09:05,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3849 states to 3849 states and 5959 transitions. [2022-03-20 12:09:05,180 INFO L78 Accepts]: Start accepts. Automaton has 3849 states and 5959 transitions. Word has length 31 [2022-03-20 12:09:05,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:09:05,180 INFO L478 AbstractCegarLoop]: Abstraction has 3849 states and 5959 transitions. [2022-03-20 12:09:05,180 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) [2022-03-20 12:09:05,181 INFO L276 IsEmpty]: Start isEmpty. Operand 3849 states and 5959 transitions. [2022-03-20 12:09:05,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-20 12:09:05,186 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:09:05,186 INFO L499 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] [2022-03-20 12:09:05,186 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-03-20 12:09:05,186 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:09:05,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:09:05,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1823411364, now seen corresponding path program 1 times [2022-03-20 12:09:05,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:09:05,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755188514] [2022-03-20 12:09:05,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:09:05,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:09:05,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:05,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:09:05,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:05,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:09:05,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:09:05,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755188514] [2022-03-20 12:09:05,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755188514] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:09:05,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:09:05,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:09:05,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047442831] [2022-03-20 12:09:05,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:09:05,213 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:09:05,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:09:05,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:09:05,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:09:05,214 INFO L87 Difference]: Start difference. First operand 3849 states and 5959 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) [2022-03-20 12:09:05,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:09:05,345 INFO L93 Difference]: Finished difference Result 9037 states and 14089 transitions. [2022-03-20 12:09:05,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:09:05,346 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 [2022-03-20 12:09:05,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:09:05,376 INFO L225 Difference]: With dead ends: 9037 [2022-03-20 12:09:05,377 INFO L226 Difference]: Without dead ends: 5259 [2022-03-20 12:09:05,384 INFO L912 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 [2022-03-20 12:09:05,385 INFO L913 BasicCegarLoop]: 132 mSDtfsCounter, 172 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 139 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 [2022-03-20 12:09:05,385 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 139 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:09:05,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5259 states. [2022-03-20 12:09:05,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5259 to 5257. [2022-03-20 12:09:05,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5257 states, 5253 states have (on average 1.5480677707976394) internal successors, (8132), 5253 states have internal predecessors, (8132), 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) [2022-03-20 12:09:05,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5257 states to 5257 states and 8135 transitions. [2022-03-20 12:09:05,570 INFO L78 Accepts]: Start accepts. Automaton has 5257 states and 8135 transitions. Word has length 31 [2022-03-20 12:09:05,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:09:05,571 INFO L478 AbstractCegarLoop]: Abstraction has 5257 states and 8135 transitions. [2022-03-20 12:09:05,571 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) [2022-03-20 12:09:05,571 INFO L276 IsEmpty]: Start isEmpty. Operand 5257 states and 8135 transitions. [2022-03-20 12:09:05,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 12:09:05,577 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:09:05,577 INFO L499 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] [2022-03-20 12:09:05,577 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-03-20 12:09:05,577 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:09:05,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:09:05,578 INFO L85 PathProgramCache]: Analyzing trace with hash 305927754, now seen corresponding path program 1 times [2022-03-20 12:09:05,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:09:05,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023714448] [2022-03-20 12:09:05,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:09:05,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:09:05,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:05,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:09:05,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:05,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:09:05,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:09:05,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023714448] [2022-03-20 12:09:05,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023714448] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:09:05,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:09:05,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:09:05,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25838620] [2022-03-20 12:09:05,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:09:05,607 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:09:05,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:09:05,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:09:05,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:09:05,608 INFO L87 Difference]: Start difference. First operand 5257 states and 8135 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) [2022-03-20 12:09:05,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:09:05,742 INFO L93 Difference]: Finished difference Result 7885 states and 12169 transitions. [2022-03-20 12:09:05,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:09:05,743 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 [2022-03-20 12:09:05,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:09:05,753 INFO L225 Difference]: With dead ends: 7885 [2022-03-20 12:09:05,753 INFO L226 Difference]: Without dead ends: 5323 [2022-03-20 12:09:05,759 INFO L912 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 [2022-03-20 12:09:05,760 INFO L913 BasicCegarLoop]: 128 mSDtfsCounter, 177 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 135 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 [2022-03-20 12:09:05,760 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 135 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:09:05,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5323 states. [2022-03-20 12:09:05,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5323 to 5321. [2022-03-20 12:09:05,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5321 states, 5317 states have (on average 1.529433891292082) internal successors, (8132), 5317 states have internal predecessors, (8132), 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) [2022-03-20 12:09:05,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5321 states to 5321 states and 8135 transitions. [2022-03-20 12:09:05,910 INFO L78 Accepts]: Start accepts. Automaton has 5321 states and 8135 transitions. Word has length 32 [2022-03-20 12:09:05,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:09:05,910 INFO L478 AbstractCegarLoop]: Abstraction has 5321 states and 8135 transitions. [2022-03-20 12:09:05,911 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) [2022-03-20 12:09:05,911 INFO L276 IsEmpty]: Start isEmpty. Operand 5321 states and 8135 transitions. [2022-03-20 12:09:05,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 12:09:05,917 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:09:05,917 INFO L499 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] [2022-03-20 12:09:05,917 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-03-20 12:09:05,917 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:09:05,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:09:05,918 INFO L85 PathProgramCache]: Analyzing trace with hash -691144599, now seen corresponding path program 1 times [2022-03-20 12:09:05,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:09:05,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007797830] [2022-03-20 12:09:05,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:09:05,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:09:05,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:05,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:09:05,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:05,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:09:05,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:09:05,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007797830] [2022-03-20 12:09:05,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007797830] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:09:05,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:09:05,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:09:05,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842981226] [2022-03-20 12:09:05,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:09:05,951 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:09:05,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:09:05,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:09:05,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:09:05,952 INFO L87 Difference]: Start difference. First operand 5321 states and 8135 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) [2022-03-20 12:09:06,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:09:06,093 INFO L93 Difference]: Finished difference Result 9485 states and 14857 transitions. [2022-03-20 12:09:06,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:09:06,094 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 [2022-03-20 12:09:06,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:09:06,115 INFO L225 Difference]: With dead ends: 9485 [2022-03-20 12:09:06,115 INFO L226 Difference]: Without dead ends: 9483 [2022-03-20 12:09:06,121 INFO L912 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 [2022-03-20 12:09:06,122 INFO L913 BasicCegarLoop]: 88 mSDtfsCounter, 187 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 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 [2022-03-20 12:09:06,122 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 95 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:09:06,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9483 states. [2022-03-20 12:09:06,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9483 to 7689. [2022-03-20 12:09:06,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7689 states, 7685 states have (on average 1.4828887443070917) internal successors, (11396), 7685 states have internal predecessors, (11396), 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) [2022-03-20 12:09:06,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7689 states to 7689 states and 11399 transitions. [2022-03-20 12:09:06,341 INFO L78 Accepts]: Start accepts. Automaton has 7689 states and 11399 transitions. Word has length 32 [2022-03-20 12:09:06,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:09:06,342 INFO L478 AbstractCegarLoop]: Abstraction has 7689 states and 11399 transitions. [2022-03-20 12:09:06,342 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) [2022-03-20 12:09:06,342 INFO L276 IsEmpty]: Start isEmpty. Operand 7689 states and 11399 transitions. [2022-03-20 12:09:06,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 12:09:06,352 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:09:06,352 INFO L499 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] [2022-03-20 12:09:06,352 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-03-20 12:09:06,352 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:09:06,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:09:06,353 INFO L85 PathProgramCache]: Analyzing trace with hash 662165098, now seen corresponding path program 1 times [2022-03-20 12:09:06,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:09:06,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889781800] [2022-03-20 12:09:06,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:09:06,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:09:06,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:06,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:09:06,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:06,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:09:06,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:09:06,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889781800] [2022-03-20 12:09:06,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889781800] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:09:06,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:09:06,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:09:06,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34986659] [2022-03-20 12:09:06,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:09:06,381 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:09:06,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:09:06,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:09:06,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:09:06,382 INFO L87 Difference]: Start difference. First operand 7689 states and 11399 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) [2022-03-20 12:09:06,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:09:06,551 INFO L93 Difference]: Finished difference Result 17933 states and 26761 transitions. [2022-03-20 12:09:06,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:09:06,552 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 [2022-03-20 12:09:06,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:09:06,571 INFO L225 Difference]: With dead ends: 17933 [2022-03-20 12:09:06,571 INFO L226 Difference]: Without dead ends: 10379 [2022-03-20 12:09:06,587 INFO L912 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 [2022-03-20 12:09:06,589 INFO L913 BasicCegarLoop]: 134 mSDtfsCounter, 166 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 141 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 [2022-03-20 12:09:06,589 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 141 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:09:06,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10379 states. [2022-03-20 12:09:06,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10379 to 10377. [2022-03-20 12:09:06,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10377 states, 10373 states have (on average 1.4811529933481153) internal successors, (15364), 10373 states have internal predecessors, (15364), 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) [2022-03-20 12:09:06,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10377 states to 10377 states and 15367 transitions. [2022-03-20 12:09:06,862 INFO L78 Accepts]: Start accepts. Automaton has 10377 states and 15367 transitions. Word has length 32 [2022-03-20 12:09:06,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:09:06,862 INFO L478 AbstractCegarLoop]: Abstraction has 10377 states and 15367 transitions. [2022-03-20 12:09:06,862 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) [2022-03-20 12:09:06,862 INFO L276 IsEmpty]: Start isEmpty. Operand 10377 states and 15367 transitions. [2022-03-20 12:09:06,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 12:09:06,872 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:09:06,873 INFO L499 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] [2022-03-20 12:09:06,873 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-03-20 12:09:06,873 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:09:06,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:09:06,873 INFO L85 PathProgramCache]: Analyzing trace with hash 49386872, now seen corresponding path program 1 times [2022-03-20 12:09:06,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:09:06,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940489685] [2022-03-20 12:09:06,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:09:06,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:09:06,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:06,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:09:06,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:06,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:09:06,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:09:06,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940489685] [2022-03-20 12:09:06,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940489685] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:09:06,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:09:06,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:09:06,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935484043] [2022-03-20 12:09:06,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:09:06,906 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:09:06,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:09:06,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:09:06,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:09:06,906 INFO L87 Difference]: Start difference. First operand 10377 states and 15367 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) [2022-03-20 12:09:07,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:09:07,076 INFO L93 Difference]: Finished difference Result 15565 states and 22985 transitions. [2022-03-20 12:09:07,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:09:07,077 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 [2022-03-20 12:09:07,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:09:07,095 INFO L225 Difference]: With dead ends: 15565 [2022-03-20 12:09:07,096 INFO L226 Difference]: Without dead ends: 10507 [2022-03-20 12:09:07,157 INFO L912 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 [2022-03-20 12:09:07,158 INFO L913 BasicCegarLoop]: 125 mSDtfsCounter, 176 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 132 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 [2022-03-20 12:09:07,158 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 132 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:09:07,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10507 states. [2022-03-20 12:09:07,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10507 to 10505. [2022-03-20 12:09:07,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10505 states, 10501 states have (on average 1.4630987524997618) internal successors, (15364), 10501 states have internal predecessors, (15364), 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) [2022-03-20 12:09:07,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10505 states to 10505 states and 15367 transitions. [2022-03-20 12:09:07,341 INFO L78 Accepts]: Start accepts. Automaton has 10505 states and 15367 transitions. Word has length 33 [2022-03-20 12:09:07,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:09:07,341 INFO L478 AbstractCegarLoop]: Abstraction has 10505 states and 15367 transitions. [2022-03-20 12:09:07,341 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) [2022-03-20 12:09:07,341 INFO L276 IsEmpty]: Start isEmpty. Operand 10505 states and 15367 transitions. [2022-03-20 12:09:07,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 12:09:07,352 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:09:07,352 INFO L499 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] [2022-03-20 12:09:07,352 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-03-20 12:09:07,352 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:09:07,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:09:07,352 INFO L85 PathProgramCache]: Analyzing trace with hash -947685481, now seen corresponding path program 1 times [2022-03-20 12:09:07,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:09:07,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357414683] [2022-03-20 12:09:07,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:09:07,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:09:07,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:07,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:09:07,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:07,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:09:07,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:09:07,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357414683] [2022-03-20 12:09:07,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357414683] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:09:07,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:09:07,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:09:07,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104410343] [2022-03-20 12:09:07,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:09:07,382 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:09:07,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:09:07,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:09:07,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:09:07,383 INFO L87 Difference]: Start difference. First operand 10505 states and 15367 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) [2022-03-20 12:09:07,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:09:07,668 INFO L93 Difference]: Finished difference Result 18445 states and 27657 transitions. [2022-03-20 12:09:07,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:09:07,668 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 [2022-03-20 12:09:07,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:09:07,702 INFO L225 Difference]: With dead ends: 18445 [2022-03-20 12:09:07,702 INFO L226 Difference]: Without dead ends: 18443 [2022-03-20 12:09:07,710 INFO L912 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 [2022-03-20 12:09:07,710 INFO L913 BasicCegarLoop]: 87 mSDtfsCounter, 180 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 94 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 [2022-03-20 12:09:07,714 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 94 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:09:07,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18443 states. [2022-03-20 12:09:07,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18443 to 15369. [2022-03-20 12:09:08,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15369 states, 15365 states have (on average 1.4164659941425317) internal successors, (21764), 15365 states have internal predecessors, (21764), 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) [2022-03-20 12:09:08,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15369 states to 15369 states and 21767 transitions. [2022-03-20 12:09:08,042 INFO L78 Accepts]: Start accepts. Automaton has 15369 states and 21767 transitions. Word has length 33 [2022-03-20 12:09:08,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:09:08,042 INFO L478 AbstractCegarLoop]: Abstraction has 15369 states and 21767 transitions. [2022-03-20 12:09:08,042 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) [2022-03-20 12:09:08,043 INFO L276 IsEmpty]: Start isEmpty. Operand 15369 states and 21767 transitions. [2022-03-20 12:09:08,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 12:09:08,062 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:09:08,062 INFO L499 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] [2022-03-20 12:09:08,062 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-03-20 12:09:08,063 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:09:08,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:09:08,063 INFO L85 PathProgramCache]: Analyzing trace with hash 405624216, now seen corresponding path program 1 times [2022-03-20 12:09:08,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:09:08,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354995473] [2022-03-20 12:09:08,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:09:08,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:09:08,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:08,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:09:08,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:08,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:09:08,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:09:08,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354995473] [2022-03-20 12:09:08,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354995473] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:09:08,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:09:08,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:09:08,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6818891] [2022-03-20 12:09:08,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:09:08,097 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:09:08,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:09:08,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:09:08,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:09:08,098 INFO L87 Difference]: Start difference. First operand 15369 states and 21767 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) [2022-03-20 12:09:08,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:09:08,401 INFO L93 Difference]: Finished difference Result 35597 states and 50697 transitions. [2022-03-20 12:09:08,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:09:08,402 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 [2022-03-20 12:09:08,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:09:08,441 INFO L225 Difference]: With dead ends: 35597 [2022-03-20 12:09:08,441 INFO L226 Difference]: Without dead ends: 20491 [2022-03-20 12:09:08,467 INFO L912 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 [2022-03-20 12:09:08,468 INFO L913 BasicCegarLoop]: 136 mSDtfsCounter, 160 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:09:08,468 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 143 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:09:08,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20491 states. [2022-03-20 12:09:08,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20491 to 20489. [2022-03-20 12:09:08,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20489 states, 20485 states have (on average 1.4123505003661216) internal successors, (28932), 20485 states have internal predecessors, (28932), 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) [2022-03-20 12:09:08,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20489 states to 20489 states and 28935 transitions. [2022-03-20 12:09:08,825 INFO L78 Accepts]: Start accepts. Automaton has 20489 states and 28935 transitions. Word has length 33 [2022-03-20 12:09:08,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:09:08,825 INFO L478 AbstractCegarLoop]: Abstraction has 20489 states and 28935 transitions. [2022-03-20 12:09:08,825 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) [2022-03-20 12:09:08,825 INFO L276 IsEmpty]: Start isEmpty. Operand 20489 states and 28935 transitions. [2022-03-20 12:09:08,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 12:09:08,841 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:09:08,841 INFO L499 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] [2022-03-20 12:09:08,842 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-03-20 12:09:08,842 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:09:08,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:09:08,842 INFO L85 PathProgramCache]: Analyzing trace with hash 686554246, now seen corresponding path program 1 times [2022-03-20 12:09:08,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:09:08,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327032198] [2022-03-20 12:09:08,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:09:08,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:09:08,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:08,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:09:08,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:08,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:09:08,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:09:08,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327032198] [2022-03-20 12:09:08,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327032198] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:09:08,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:09:08,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:09:08,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970672716] [2022-03-20 12:09:08,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:09:08,867 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:09:08,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:09:08,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:09:08,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:09:08,868 INFO L87 Difference]: Start difference. First operand 20489 states and 28935 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) [2022-03-20 12:09:09,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:09:09,204 INFO L93 Difference]: Finished difference Result 30733 states and 43273 transitions. [2022-03-20 12:09:09,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:09:09,205 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 [2022-03-20 12:09:09,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:09:09,246 INFO L225 Difference]: With dead ends: 30733 [2022-03-20 12:09:09,246 INFO L226 Difference]: Without dead ends: 20747 [2022-03-20 12:09:09,265 INFO L912 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 [2022-03-20 12:09:09,265 INFO L913 BasicCegarLoop]: 122 mSDtfsCounter, 175 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:09:09,267 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 129 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:09:09,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20747 states. [2022-03-20 12:09:09,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20747 to 20745. [2022-03-20 12:09:09,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20745 states, 20741 states have (on average 1.3949182778072418) internal successors, (28932), 20741 states have internal predecessors, (28932), 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) [2022-03-20 12:09:09,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20745 states to 20745 states and 28935 transitions. [2022-03-20 12:09:09,746 INFO L78 Accepts]: Start accepts. Automaton has 20745 states and 28935 transitions. Word has length 34 [2022-03-20 12:09:09,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:09:09,746 INFO L478 AbstractCegarLoop]: Abstraction has 20745 states and 28935 transitions. [2022-03-20 12:09:09,747 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) [2022-03-20 12:09:09,747 INFO L276 IsEmpty]: Start isEmpty. Operand 20745 states and 28935 transitions. [2022-03-20 12:09:09,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 12:09:09,762 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:09:09,762 INFO L499 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] [2022-03-20 12:09:09,762 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-03-20 12:09:09,762 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:09:09,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:09:09,763 INFO L85 PathProgramCache]: Analyzing trace with hash -310518107, now seen corresponding path program 1 times [2022-03-20 12:09:09,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:09:09,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102227971] [2022-03-20 12:09:09,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:09:09,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:09:09,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:09,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:09:09,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:09,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:09:09,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:09:09,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102227971] [2022-03-20 12:09:09,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102227971] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:09:09,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:09:09,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:09:09,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944770797] [2022-03-20 12:09:09,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:09:09,789 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:09:09,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:09:09,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:09:09,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:09:09,790 INFO L87 Difference]: Start difference. First operand 20745 states and 28935 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) [2022-03-20 12:09:10,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:09:10,135 INFO L93 Difference]: Finished difference Result 35853 states and 51209 transitions. [2022-03-20 12:09:10,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:09:10,136 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 [2022-03-20 12:09:10,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:09:10,194 INFO L225 Difference]: With dead ends: 35853 [2022-03-20 12:09:10,194 INFO L226 Difference]: Without dead ends: 35851 [2022-03-20 12:09:10,216 INFO L912 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 [2022-03-20 12:09:10,217 INFO L913 BasicCegarLoop]: 86 mSDtfsCounter, 173 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 93 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 [2022-03-20 12:09:10,217 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 93 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:09:10,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35851 states. [2022-03-20 12:09:10,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35851 to 30729. [2022-03-20 12:09:10,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30729 states, 30725 states have (on average 1.3499104963384865) internal successors, (41476), 30725 states have internal predecessors, (41476), 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) [2022-03-20 12:09:11,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30729 states to 30729 states and 41479 transitions. [2022-03-20 12:09:11,037 INFO L78 Accepts]: Start accepts. Automaton has 30729 states and 41479 transitions. Word has length 34 [2022-03-20 12:09:11,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:09:11,037 INFO L478 AbstractCegarLoop]: Abstraction has 30729 states and 41479 transitions. [2022-03-20 12:09:11,037 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) [2022-03-20 12:09:11,037 INFO L276 IsEmpty]: Start isEmpty. Operand 30729 states and 41479 transitions. [2022-03-20 12:09:11,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 12:09:11,068 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:09:11,068 INFO L499 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] [2022-03-20 12:09:11,068 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-03-20 12:09:11,068 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:09:11,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:09:11,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1042791590, now seen corresponding path program 1 times [2022-03-20 12:09:11,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:09:11,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144612931] [2022-03-20 12:09:11,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:09:11,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:09:11,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:11,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:09:11,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:11,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:09:11,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:09:11,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144612931] [2022-03-20 12:09:11,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144612931] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:09:11,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:09:11,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:09:11,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381128745] [2022-03-20 12:09:11,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:09:11,112 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:09:11,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:09:11,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:09:11,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:09:11,114 INFO L87 Difference]: Start difference. First operand 30729 states and 41479 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) [2022-03-20 12:09:11,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:09:11,821 INFO L93 Difference]: Finished difference Result 70669 states and 95753 transitions. [2022-03-20 12:09:11,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:09:11,822 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 [2022-03-20 12:09:11,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:09:11,871 INFO L225 Difference]: With dead ends: 70669 [2022-03-20 12:09:11,872 INFO L226 Difference]: Without dead ends: 40459 [2022-03-20 12:09:11,900 INFO L912 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 [2022-03-20 12:09:11,901 INFO L913 BasicCegarLoop]: 138 mSDtfsCounter, 154 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:09:11,901 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 145 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:09:11,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40459 states. [2022-03-20 12:09:12,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40459 to 40457. [2022-03-20 12:09:12,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40457 states, 40453 states have (on average 1.3417051887375473) internal successors, (54276), 40453 states have internal predecessors, (54276), 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) [2022-03-20 12:09:12,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40457 states to 40457 states and 54279 transitions. [2022-03-20 12:09:12,747 INFO L78 Accepts]: Start accepts. Automaton has 40457 states and 54279 transitions. Word has length 34 [2022-03-20 12:09:12,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:09:12,747 INFO L478 AbstractCegarLoop]: Abstraction has 40457 states and 54279 transitions. [2022-03-20 12:09:12,747 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) [2022-03-20 12:09:12,748 INFO L276 IsEmpty]: Start isEmpty. Operand 40457 states and 54279 transitions. [2022-03-20 12:09:12,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-20 12:09:12,769 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:09:12,769 INFO L499 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] [2022-03-20 12:09:12,770 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-03-20 12:09:12,770 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:09:12,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:09:12,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1036093516, now seen corresponding path program 1 times [2022-03-20 12:09:12,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:09:12,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471869746] [2022-03-20 12:09:12,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:09:12,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:09:12,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:12,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:09:12,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:12,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:09:12,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:09:12,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471869746] [2022-03-20 12:09:12,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471869746] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:09:12,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:09:12,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:09:12,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182146105] [2022-03-20 12:09:12,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:09:12,795 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:09:12,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:09:12,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:09:12,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:09:12,796 INFO L87 Difference]: Start difference. First operand 40457 states and 54279 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) [2022-03-20 12:09:13,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:09:13,230 INFO L93 Difference]: Finished difference Result 60685 states and 81161 transitions. [2022-03-20 12:09:13,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:09:13,231 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 [2022-03-20 12:09:13,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:09:13,275 INFO L225 Difference]: With dead ends: 60685 [2022-03-20 12:09:13,275 INFO L226 Difference]: Without dead ends: 40971 [2022-03-20 12:09:13,359 INFO L912 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 [2022-03-20 12:09:13,360 INFO L913 BasicCegarLoop]: 119 mSDtfsCounter, 174 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:09:13,360 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 126 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:09:13,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40971 states. [2022-03-20 12:09:13,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40971 to 40969. [2022-03-20 12:09:13,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40969 states, 40965 states have (on average 1.3249359209080922) internal successors, (54276), 40965 states have internal predecessors, (54276), 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) [2022-03-20 12:09:14,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40969 states to 40969 states and 54279 transitions. [2022-03-20 12:09:14,136 INFO L78 Accepts]: Start accepts. Automaton has 40969 states and 54279 transitions. Word has length 35 [2022-03-20 12:09:14,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:09:14,137 INFO L478 AbstractCegarLoop]: Abstraction has 40969 states and 54279 transitions. [2022-03-20 12:09:14,137 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) [2022-03-20 12:09:14,137 INFO L276 IsEmpty]: Start isEmpty. Operand 40969 states and 54279 transitions. [2022-03-20 12:09:14,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-20 12:09:14,161 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:09:14,171 INFO L499 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] [2022-03-20 12:09:14,172 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-03-20 12:09:14,172 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:09:14,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:09:14,172 INFO L85 PathProgramCache]: Analyzing trace with hash -2033165869, now seen corresponding path program 1 times [2022-03-20 12:09:14,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:09:14,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773772738] [2022-03-20 12:09:14,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:09:14,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:09:14,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:14,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:09:14,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:14,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:09:14,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:09:14,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773772738] [2022-03-20 12:09:14,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773772738] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:09:14,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:09:14,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:09:14,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718159793] [2022-03-20 12:09:14,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:09:14,199 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:09:14,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:09:14,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:09:14,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:09:14,200 INFO L87 Difference]: Start difference. First operand 40969 states and 54279 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) [2022-03-20 12:09:14,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:09:14,844 INFO L93 Difference]: Finished difference Result 69645 states and 94217 transitions. [2022-03-20 12:09:14,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:09:14,844 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 [2022-03-20 12:09:14,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:09:14,926 INFO L225 Difference]: With dead ends: 69645 [2022-03-20 12:09:14,927 INFO L226 Difference]: Without dead ends: 69643 [2022-03-20 12:09:14,941 INFO L912 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 [2022-03-20 12:09:14,941 INFO L913 BasicCegarLoop]: 85 mSDtfsCounter, 166 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 92 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 [2022-03-20 12:09:14,942 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 92 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:09:14,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69643 states. [2022-03-20 12:09:15,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69643 to 61449. [2022-03-20 12:09:15,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61449 states, 61445 states have (on average 1.283294002766702) internal successors, (78852), 61445 states have internal predecessors, (78852), 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) [2022-03-20 12:09:15,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61449 states to 61449 states and 78855 transitions. [2022-03-20 12:09:15,928 INFO L78 Accepts]: Start accepts. Automaton has 61449 states and 78855 transitions. Word has length 35 [2022-03-20 12:09:15,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:09:15,928 INFO L478 AbstractCegarLoop]: Abstraction has 61449 states and 78855 transitions. [2022-03-20 12:09:15,928 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) [2022-03-20 12:09:15,928 INFO L276 IsEmpty]: Start isEmpty. Operand 61449 states and 78855 transitions. [2022-03-20 12:09:15,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-20 12:09:15,969 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:09:15,969 INFO L499 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] [2022-03-20 12:09:15,969 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-03-20 12:09:15,969 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:09:15,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:09:15,970 INFO L85 PathProgramCache]: Analyzing trace with hash -679856172, now seen corresponding path program 1 times [2022-03-20 12:09:15,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:09:15,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583950832] [2022-03-20 12:09:15,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:09:15,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:09:15,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:15,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:09:15,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:15,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:09:15,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:09:15,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583950832] [2022-03-20 12:09:15,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583950832] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:09:15,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:09:15,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:09:15,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120500985] [2022-03-20 12:09:15,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:09:15,995 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:09:15,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:09:15,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:09:15,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:09:15,995 INFO L87 Difference]: Start difference. First operand 61449 states and 78855 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) [2022-03-20 12:09:17,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:09:17,097 INFO L93 Difference]: Finished difference Result 140301 states and 180233 transitions. [2022-03-20 12:09:17,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:09:17,098 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 [2022-03-20 12:09:17,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:09:17,302 INFO L225 Difference]: With dead ends: 140301 [2022-03-20 12:09:17,303 INFO L226 Difference]: Without dead ends: 79883 [2022-03-20 12:09:17,337 INFO L912 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 [2022-03-20 12:09:17,338 INFO L913 BasicCegarLoop]: 140 mSDtfsCounter, 148 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 12:09:17,338 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 147 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 12:09:17,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79883 states. [2022-03-20 12:09:18,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79883 to 79881. [2022-03-20 12:09:18,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79881 states, 79877 states have (on average 1.2692013971481153) internal successors, (101380), 79877 states have internal predecessors, (101380), 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) [2022-03-20 12:09:18,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79881 states to 79881 states and 101383 transitions. [2022-03-20 12:09:18,619 INFO L78 Accepts]: Start accepts. Automaton has 79881 states and 101383 transitions. Word has length 35 [2022-03-20 12:09:18,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:09:18,620 INFO L478 AbstractCegarLoop]: Abstraction has 79881 states and 101383 transitions. [2022-03-20 12:09:18,620 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) [2022-03-20 12:09:18,620 INFO L276 IsEmpty]: Start isEmpty. Operand 79881 states and 101383 transitions. [2022-03-20 12:09:18,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 12:09:18,657 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:09:18,657 INFO L499 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] [2022-03-20 12:09:18,657 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-03-20 12:09:18,657 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:09:18,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:09:18,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1396400834, now seen corresponding path program 1 times [2022-03-20 12:09:18,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:09:18,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599685171] [2022-03-20 12:09:18,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:09:18,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:09:18,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:18,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:09:18,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:18,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:09:18,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:09:18,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599685171] [2022-03-20 12:09:18,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599685171] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:09:18,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:09:18,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:09:18,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781063906] [2022-03-20 12:09:18,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:09:18,683 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:09:18,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:09:18,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:09:18,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:09:18,683 INFO L87 Difference]: Start difference. First operand 79881 states and 101383 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) [2022-03-20 12:09:19,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:09:19,703 INFO L93 Difference]: Finished difference Result 119821 states and 151561 transitions. [2022-03-20 12:09:19,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:09:19,703 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 [2022-03-20 12:09:19,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:09:19,798 INFO L225 Difference]: With dead ends: 119821 [2022-03-20 12:09:19,799 INFO L226 Difference]: Without dead ends: 80907 [2022-03-20 12:09:19,833 INFO L912 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 [2022-03-20 12:09:19,833 INFO L913 BasicCegarLoop]: 116 mSDtfsCounter, 173 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:09:19,833 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 123 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:09:19,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80907 states. [2022-03-20 12:09:20,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80907 to 80905. [2022-03-20 12:09:21,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80905 states, 80901 states have (on average 1.253136549610017) internal successors, (101380), 80901 states have internal predecessors, (101380), 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) [2022-03-20 12:09:21,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80905 states to 80905 states and 101383 transitions. [2022-03-20 12:09:21,142 INFO L78 Accepts]: Start accepts. Automaton has 80905 states and 101383 transitions. Word has length 36 [2022-03-20 12:09:21,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:09:21,142 INFO L478 AbstractCegarLoop]: Abstraction has 80905 states and 101383 transitions. [2022-03-20 12:09:21,142 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) [2022-03-20 12:09:21,142 INFO L276 IsEmpty]: Start isEmpty. Operand 80905 states and 101383 transitions. [2022-03-20 12:09:21,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 12:09:21,173 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:09:21,173 INFO L499 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] [2022-03-20 12:09:21,173 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-03-20 12:09:21,173 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:09:21,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:09:21,173 INFO L85 PathProgramCache]: Analyzing trace with hash 399328481, now seen corresponding path program 1 times [2022-03-20 12:09:21,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:09:21,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595293318] [2022-03-20 12:09:21,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:09:21,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:09:21,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:21,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:09:21,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:21,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:09:21,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:09:21,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595293318] [2022-03-20 12:09:21,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595293318] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:09:21,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:09:21,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:09:21,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210837460] [2022-03-20 12:09:21,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:09:21,195 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:09:21,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:09:21,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:09:21,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:09:21,196 INFO L87 Difference]: Start difference. First operand 80905 states and 101383 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) [2022-03-20 12:09:22,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:09:22,648 INFO L93 Difference]: Finished difference Result 135181 states and 172041 transitions. [2022-03-20 12:09:22,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:09:22,649 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 [2022-03-20 12:09:22,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:09:22,817 INFO L225 Difference]: With dead ends: 135181 [2022-03-20 12:09:22,817 INFO L226 Difference]: Without dead ends: 135179 [2022-03-20 12:09:22,845 INFO L912 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 [2022-03-20 12:09:22,845 INFO L913 BasicCegarLoop]: 84 mSDtfsCounter, 159 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 12:09:22,846 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 91 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 12:09:22,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135179 states. [2022-03-20 12:09:24,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135179 to 122889. [2022-03-20 12:09:24,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122889 states, 122885 states have (on average 1.2166497131464378) internal successors, (149508), 122885 states have internal predecessors, (149508), 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) [2022-03-20 12:09:24,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122889 states to 122889 states and 149511 transitions. [2022-03-20 12:09:24,880 INFO L78 Accepts]: Start accepts. Automaton has 122889 states and 149511 transitions. Word has length 36 [2022-03-20 12:09:24,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:09:24,880 INFO L478 AbstractCegarLoop]: Abstraction has 122889 states and 149511 transitions. [2022-03-20 12:09:24,880 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) [2022-03-20 12:09:24,880 INFO L276 IsEmpty]: Start isEmpty. Operand 122889 states and 149511 transitions. [2022-03-20 12:09:24,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 12:09:24,938 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:09:24,938 INFO L499 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] [2022-03-20 12:09:24,938 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-03-20 12:09:24,938 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:09:24,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:09:24,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1752638178, now seen corresponding path program 1 times [2022-03-20 12:09:24,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:09:24,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844206504] [2022-03-20 12:09:24,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:09:24,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:09:24,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:24,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:09:24,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:24,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:09:24,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:09:24,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844206504] [2022-03-20 12:09:24,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844206504] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:09:24,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:09:24,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:09:24,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446456878] [2022-03-20 12:09:24,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:09:24,963 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:09:24,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:09:24,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:09:24,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:09:24,963 INFO L87 Difference]: Start difference. First operand 122889 states and 149511 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) [2022-03-20 12:09:26,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:09:26,939 INFO L93 Difference]: Finished difference Result 278541 states and 337929 transitions. [2022-03-20 12:09:26,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:09:26,940 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 [2022-03-20 12:09:26,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:09:27,250 INFO L225 Difference]: With dead ends: 278541 [2022-03-20 12:09:27,250 INFO L226 Difference]: Without dead ends: 157707 [2022-03-20 12:09:27,328 INFO L912 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 [2022-03-20 12:09:27,328 INFO L913 BasicCegarLoop]: 142 mSDtfsCounter, 142 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:09:27,328 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 149 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:09:27,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157707 states. [2022-03-20 12:09:29,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157707 to 157705. [2022-03-20 12:09:29,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157705 states, 157701 states have (on average 1.1947926772816913) internal successors, (188420), 157701 states have internal predecessors, (188420), 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) [2022-03-20 12:09:30,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157705 states to 157705 states and 188423 transitions. [2022-03-20 12:09:30,108 INFO L78 Accepts]: Start accepts. Automaton has 157705 states and 188423 transitions. Word has length 36 [2022-03-20 12:09:30,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:09:30,108 INFO L478 AbstractCegarLoop]: Abstraction has 157705 states and 188423 transitions. [2022-03-20 12:09:30,109 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) [2022-03-20 12:09:30,109 INFO L276 IsEmpty]: Start isEmpty. Operand 157705 states and 188423 transitions. [2022-03-20 12:09:30,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 12:09:30,188 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:09:30,188 INFO L499 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] [2022-03-20 12:09:30,188 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-03-20 12:09:30,188 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:09:30,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:09:30,189 INFO L85 PathProgramCache]: Analyzing trace with hash -505685520, now seen corresponding path program 1 times [2022-03-20 12:09:30,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:09:30,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578324466] [2022-03-20 12:09:30,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:09:30,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:09:30,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:30,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:09:30,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:30,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:09:30,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:09:30,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578324466] [2022-03-20 12:09:30,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578324466] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:09:30,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:09:30,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:09:30,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133645333] [2022-03-20 12:09:30,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:09:30,213 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:09:30,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:09:30,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:09:30,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:09:30,214 INFO L87 Difference]: Start difference. First operand 157705 states and 188423 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) [2022-03-20 12:09:32,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:09:32,036 INFO L93 Difference]: Finished difference Result 236557 states and 281609 transitions. [2022-03-20 12:09:32,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:09:32,036 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 [2022-03-20 12:09:32,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:09:32,418 INFO L225 Difference]: With dead ends: 236557 [2022-03-20 12:09:32,418 INFO L226 Difference]: Without dead ends: 159755 [2022-03-20 12:09:32,457 INFO L912 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 [2022-03-20 12:09:32,458 INFO L913 BasicCegarLoop]: 113 mSDtfsCounter, 172 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:09:32,458 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 120 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:09:32,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159755 states. [2022-03-20 12:09:34,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159755 to 159753. [2022-03-20 12:09:34,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159753 states, 159749 states have (on average 1.179475301879824) internal successors, (188420), 159749 states have internal predecessors, (188420), 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) [2022-03-20 12:09:35,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159753 states to 159753 states and 188423 transitions. [2022-03-20 12:09:35,169 INFO L78 Accepts]: Start accepts. Automaton has 159753 states and 188423 transitions. Word has length 37 [2022-03-20 12:09:35,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:09:35,170 INFO L478 AbstractCegarLoop]: Abstraction has 159753 states and 188423 transitions. [2022-03-20 12:09:35,170 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) [2022-03-20 12:09:35,170 INFO L276 IsEmpty]: Start isEmpty. Operand 159753 states and 188423 transitions. [2022-03-20 12:09:35,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 12:09:35,249 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:09:35,249 INFO L499 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] [2022-03-20 12:09:35,249 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-03-20 12:09:35,249 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:09:35,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:09:35,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1502757873, now seen corresponding path program 1 times [2022-03-20 12:09:35,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:09:35,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501911270] [2022-03-20 12:09:35,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:09:35,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:09:35,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:35,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:09:35,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:35,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:09:35,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:09:35,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501911270] [2022-03-20 12:09:35,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501911270] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:09:35,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:09:35,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:09:35,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955013868] [2022-03-20 12:09:35,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:09:35,283 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:09:35,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:09:35,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:09:35,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:09:35,285 INFO L87 Difference]: Start difference. First operand 159753 states and 188423 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) [2022-03-20 12:09:37,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:09:37,838 INFO L93 Difference]: Finished difference Result 262157 states and 311305 transitions. [2022-03-20 12:09:37,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:09:37,839 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 [2022-03-20 12:09:37,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:09:38,230 INFO L225 Difference]: With dead ends: 262157 [2022-03-20 12:09:38,230 INFO L226 Difference]: Without dead ends: 262155 [2022-03-20 12:09:38,287 INFO L912 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 [2022-03-20 12:09:38,288 INFO L913 BasicCegarLoop]: 83 mSDtfsCounter, 152 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:09:38,288 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 90 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:09:38,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262155 states. [2022-03-20 12:09:41,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262155 to 245769. [2022-03-20 12:09:41,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245769 states, 245765 states have (on average 1.1499928793766403) internal successors, (282628), 245765 states have internal predecessors, (282628), 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) [2022-03-20 12:09:42,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245769 states to 245769 states and 282631 transitions. [2022-03-20 12:09:42,684 INFO L78 Accepts]: Start accepts. Automaton has 245769 states and 282631 transitions. Word has length 37 [2022-03-20 12:09:42,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:09:42,684 INFO L478 AbstractCegarLoop]: Abstraction has 245769 states and 282631 transitions. [2022-03-20 12:09:42,684 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) [2022-03-20 12:09:42,684 INFO L276 IsEmpty]: Start isEmpty. Operand 245769 states and 282631 transitions. [2022-03-20 12:09:42,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 12:09:42,833 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:09:42,833 INFO L499 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] [2022-03-20 12:09:42,833 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-03-20 12:09:42,833 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:09:42,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:09:42,834 INFO L85 PathProgramCache]: Analyzing trace with hash -149448176, now seen corresponding path program 1 times [2022-03-20 12:09:42,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:09:42,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821757550] [2022-03-20 12:09:42,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:09:42,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:09:42,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:42,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:09:42,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:42,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:09:42,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:09:42,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821757550] [2022-03-20 12:09:42,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821757550] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:09:42,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:09:42,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:09:42,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892759734] [2022-03-20 12:09:42,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:09:42,854 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:09:42,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:09:42,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:09:42,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:09:42,855 INFO L87 Difference]: Start difference. First operand 245769 states and 282631 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) [2022-03-20 12:09:46,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:09:46,382 INFO L93 Difference]: Finished difference Result 552973 states and 630793 transitions. [2022-03-20 12:09:46,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:09:46,382 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 [2022-03-20 12:09:46,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:09:46,905 INFO L225 Difference]: With dead ends: 552973 [2022-03-20 12:09:46,905 INFO L226 Difference]: Without dead ends: 311307 [2022-03-20 12:09:47,442 INFO L912 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 [2022-03-20 12:09:47,445 INFO L913 BasicCegarLoop]: 144 mSDtfsCounter, 136 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 12:09:47,445 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 151 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 12:09:47,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311307 states. [2022-03-20 12:09:52,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311307 to 311305. [2022-03-20 12:09:52,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311305 states, 311301 states have (on average 1.1184159382719618) internal successors, (348164), 311301 states have internal predecessors, (348164), 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) [2022-03-20 12:09:53,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311305 states to 311305 states and 348167 transitions. [2022-03-20 12:09:53,794 INFO L78 Accepts]: Start accepts. Automaton has 311305 states and 348167 transitions. Word has length 37 [2022-03-20 12:09:53,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:09:53,795 INFO L478 AbstractCegarLoop]: Abstraction has 311305 states and 348167 transitions. [2022-03-20 12:09:53,795 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) [2022-03-20 12:09:53,795 INFO L276 IsEmpty]: Start isEmpty. Operand 311305 states and 348167 transitions. [2022-03-20 12:09:53,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-20 12:09:53,970 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:09:53,970 INFO L499 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] [2022-03-20 12:09:53,970 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-03-20 12:09:53,970 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:09:53,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:09:53,970 INFO L85 PathProgramCache]: Analyzing trace with hash 659179774, now seen corresponding path program 1 times [2022-03-20 12:09:53,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:09:53,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961137817] [2022-03-20 12:09:53,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:09:53,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:09:53,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:53,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:09:53,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:09:53,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:09:53,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:09:53,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961137817] [2022-03-20 12:09:53,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961137817] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:09:53,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:09:53,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:09:53,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266249737] [2022-03-20 12:09:53,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:09:53,993 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:09:53,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:09:53,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:09:53,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:09:53,994 INFO L87 Difference]: Start difference. First operand 311305 states and 348167 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) [2022-03-20 12:09:57,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:09:57,338 INFO L93 Difference]: Finished difference Result 466957 states and 520201 transitions. [2022-03-20 12:09:57,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:09:57,338 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 [2022-03-20 12:09:57,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:09:58,125 INFO L225 Difference]: With dead ends: 466957 [2022-03-20 12:09:58,125 INFO L226 Difference]: Without dead ends: 315403 [2022-03-20 12:09:58,216 INFO L912 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 [2022-03-20 12:09:58,217 INFO L913 BasicCegarLoop]: 110 mSDtfsCounter, 171 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:09:58,217 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 117 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:09:58,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315403 states. [2022-03-20 12:10:02,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315403 to 315401. [2022-03-20 12:10:02,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315401 states, 315397 states have (on average 1.1038912862202241) internal successors, (348164), 315397 states have internal predecessors, (348164), 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) [2022-03-20 12:10:03,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315401 states to 315401 states and 348167 transitions. [2022-03-20 12:10:03,623 INFO L78 Accepts]: Start accepts. Automaton has 315401 states and 348167 transitions. Word has length 38 [2022-03-20 12:10:03,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:10:03,623 INFO L478 AbstractCegarLoop]: Abstraction has 315401 states and 348167 transitions. [2022-03-20 12:10:03,623 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) [2022-03-20 12:10:03,623 INFO L276 IsEmpty]: Start isEmpty. Operand 315401 states and 348167 transitions. [2022-03-20 12:10:04,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-20 12:10:04,153 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:10:04,154 INFO L499 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] [2022-03-20 12:10:04,154 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-03-20 12:10:04,154 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:10:04,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:10:04,154 INFO L85 PathProgramCache]: Analyzing trace with hash -337892579, now seen corresponding path program 1 times [2022-03-20 12:10:04,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:10:04,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997263680] [2022-03-20 12:10:04,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:10:04,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:10:04,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:04,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:10:04,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:04,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:10:04,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:10:04,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997263680] [2022-03-20 12:10:04,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997263680] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:10:04,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:10:04,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:10:04,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252273513] [2022-03-20 12:10:04,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:10:04,175 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:10:04,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:10:04,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:10:04,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:10:04,176 INFO L87 Difference]: Start difference. First operand 315401 states and 348167 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) [2022-03-20 12:10:09,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:10:09,084 INFO L93 Difference]: Finished difference Result 507915 states and 557064 transitions. [2022-03-20 12:10:09,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:10:09,085 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 [2022-03-20 12:10:09,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:10:09,944 INFO L225 Difference]: With dead ends: 507915 [2022-03-20 12:10:09,944 INFO L226 Difference]: Without dead ends: 507913 [2022-03-20 12:10:10,031 INFO L912 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 [2022-03-20 12:10:10,031 INFO L913 BasicCegarLoop]: 81 mSDtfsCounter, 144 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:10:10,031 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 88 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:10:10,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507913 states. [2022-03-20 12:10:16,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507913 to 491529. [2022-03-20 12:10:17,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491529 states, 491525 states have (on average 1.0833304511469406) internal successors, (532484), 491525 states have internal predecessors, (532484), 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) [2022-03-20 12:10:19,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491529 states to 491529 states and 532487 transitions. [2022-03-20 12:10:19,674 INFO L78 Accepts]: Start accepts. Automaton has 491529 states and 532487 transitions. Word has length 38 [2022-03-20 12:10:19,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:10:19,675 INFO L478 AbstractCegarLoop]: Abstraction has 491529 states and 532487 transitions. [2022-03-20 12:10:19,675 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) [2022-03-20 12:10:19,675 INFO L276 IsEmpty]: Start isEmpty. Operand 491529 states and 532487 transitions. [2022-03-20 12:10:20,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-20 12:10:20,585 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:10:20,585 INFO L499 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] [2022-03-20 12:10:20,586 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-03-20 12:10:20,586 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:10:20,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:10:20,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1015417118, now seen corresponding path program 1 times [2022-03-20 12:10:20,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:10:20,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220933588] [2022-03-20 12:10:20,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:10:20,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:10:20,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:20,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:10:20,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:20,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:10:20,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:10:20,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220933588] [2022-03-20 12:10:20,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220933588] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:10:20,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:10:20,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:10:20,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534278707] [2022-03-20 12:10:20,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:10:20,661 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:10:20,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:10:20,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:10:20,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:10:20,663 INFO L87 Difference]: Start difference. First operand 491529 states and 532487 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) [2022-03-20 12:10:27,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:10:27,773 INFO L93 Difference]: Finished difference Result 1097737 states and 1171463 transitions. [2022-03-20 12:10:27,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:10:27,773 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 [2022-03-20 12:10:27,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:10:27,773 INFO L225 Difference]: With dead ends: 1097737 [2022-03-20 12:10:27,773 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 12:10:28,577 INFO L912 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 [2022-03-20 12:10:28,577 INFO L913 BasicCegarLoop]: 145 mSDtfsCounter, 127 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:10:28,577 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 152 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:10:28,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 12:10:28,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 12:10:28,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-20 12:10:28,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 12:10:28,580 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 38 [2022-03-20 12:10:28,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:10:28,580 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 12:10:28,580 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) [2022-03-20 12:10:28,580 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 12:10:28,580 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 12:10:28,582 INFO L788 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 12:10:28,585 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-03-20 12:10:28,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.