/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-7390193 [2022-04-05 09:40:33,279 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 09:40:33,301 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 09:40:33,362 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-05 09:40:33,377 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 09:40:33,380 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 09:40:33,381 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 09:40:33,383 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 09:40:33,384 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 09:40:33,385 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 09:40:33,386 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 09:40:33,391 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 09:40:33,393 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 09:40:33,393 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 09:40:33,394 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 09:40:33,395 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 09:40:33,397 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 09:40:33,402 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-05 09:40:33,410 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 09:40:33,411 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 09:40:33,412 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 09:40:33,413 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-05 09:40:33,437 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 09:40:33,437 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 09:40:33,438 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-05 09:40:33,438 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-05 09:40:33,439 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-05 09:40:33,439 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-05 09:40:33,439 INFO L138 SettingsManager]: * Use SBE=true [2022-04-05 09:40:33,439 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 09:40:33,440 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 09:40:33,440 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 09:40:33,440 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 09:40:33,441 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 09:40:33,441 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 09:40:33,441 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 09:40:33,441 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 09:40:33,441 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 09:40:33,441 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 09:40:33,442 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 09:40:33,442 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 09:40:33,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 09:40:33,442 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 09:40:33,442 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-05 09:40:33,442 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-05 09:40:33,443 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 09:40:33,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-05 09:40:33,443 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-05 09:40:33,443 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-05 09:40:33,443 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-05 09:40:33,444 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 09:40:33,445 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 09:40:33,686 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 09:40:33,714 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 09:40:33,716 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 09:40:33,717 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 09:40:33,717 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 09:40:33,718 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_14-1.c [2022-04-05 09:40:33,774 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4af6edb1b/ec82e905b0584bebbaa272219978e694/FLAG93a1c767f [2022-04-05 09:40:34,173 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 09:40:34,174 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_14-1.c [2022-04-05 09:40:34,181 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4af6edb1b/ec82e905b0584bebbaa272219978e694/FLAG93a1c767f [2022-04-05 09:40:34,193 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4af6edb1b/ec82e905b0584bebbaa272219978e694 [2022-04-05 09:40:34,195 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 09:40:34,196 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 09:40:34,200 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 09:40:34,200 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 09:40:34,203 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 09:40:34,204 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 09:40:34" (1/1) ... [2022-04-05 09:40:34,205 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e679356 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:40:34, skipping insertion in model container [2022-04-05 09:40:34,205 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 09:40:34" (1/1) ... [2022-04-05 09:40:34,211 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 09:40:34,237 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 09:40:34,437 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] [2022-04-05 09:40:34,445 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 09:40:34,453 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 09:40:34,492 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] [2022-04-05 09:40:34,493 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 09:40:34,504 INFO L208 MainTranslator]: Completed translation [2022-04-05 09:40:34,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:40:34 WrapperNode [2022-04-05 09:40:34,505 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 09:40:34,507 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 09:40:34,507 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 09:40:34,507 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 09:40:34,516 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:40:34" (1/1) ... [2022-04-05 09:40:34,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:40:34" (1/1) ... [2022-04-05 09:40:34,531 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:40:34" (1/1) ... [2022-04-05 09:40:34,531 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:40:34" (1/1) ... [2022-04-05 09:40:34,536 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:40:34" (1/1) ... [2022-04-05 09:40:34,551 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:40:34" (1/1) ... [2022-04-05 09:40:34,552 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:40:34" (1/1) ... [2022-04-05 09:40:34,554 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 09:40:34,555 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 09:40:34,555 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 09:40:34,555 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 09:40:34,558 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:40:34" (1/1) ... [2022-04-05 09:40:34,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 09:40:34,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:40:34,593 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) [2022-04-05 09:40:34,608 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 [2022-04-05 09:40:34,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 09:40:34,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 09:40:34,628 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 09:40:34,628 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 09:40:34,628 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 09:40:34,629 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 09:40:34,629 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 09:40:34,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 09:40:34,630 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-05 09:40:34,630 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 09:40:34,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 09:40:34,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 09:40:34,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 09:40:34,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 09:40:34,631 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 09:40:34,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 09:40:34,706 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 09:40:34,708 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 09:40:34,882 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 09:40:34,887 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 09:40:34,887 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-05 09:40:34,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 09:40:34 BoogieIcfgContainer [2022-04-05 09:40:34,889 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 09:40:34,890 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 09:40:34,890 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 09:40:34,891 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 09:40:34,893 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 09:40:34" (1/1) ... [2022-04-05 09:40:34,895 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-05 09:40:34,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 09:40:34 BasicIcfg [2022-04-05 09:40:34,915 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 09:40:34,917 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 09:40:34,917 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 09:40:34,919 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 09:40:34,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 09:40:34" (1/4) ... [2022-04-05 09:40:34,920 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@367e19b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 09:40:34, skipping insertion in model container [2022-04-05 09:40:34,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:40:34" (2/4) ... [2022-04-05 09:40:34,920 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@367e19b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 09:40:34, skipping insertion in model container [2022-04-05 09:40:34,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 09:40:34" (3/4) ... [2022-04-05 09:40:34,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@367e19b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 09:40:34, skipping insertion in model container [2022-04-05 09:40:34,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 09:40:34" (4/4) ... [2022-04-05 09:40:34,921 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_14-1.cqvasr [2022-04-05 09:40:34,925 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-05 09:40:34,925 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 09:40:34,988 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 09:40:34,992 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 [2022-04-05 09:40:34,993 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 09:40:35,007 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) [2022-04-05 09:40:35,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-05 09:40:35,015 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:40:35,015 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] [2022-04-05 09:40:35,016 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:40:35,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:40:35,021 INFO L85 PathProgramCache]: Analyzing trace with hash 267710119, now seen corresponding path program 1 times [2022-04-05 09:40:35,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:40:35,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574734945] [2022-04-05 09:40:35,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:40:35,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:40:35,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:35,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 09:40:35,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:35,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 09:40:35,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:40:35,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574734945] [2022-04-05 09:40:35,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574734945] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 09:40:35,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 09:40:35,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 09:40:35,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330797537] [2022-04-05 09:40:35,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 09:40:35,346 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 09:40:35,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:40:35,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 09:40:35,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 09:40:35,373 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) [2022-04-05 09:40:35,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:40:35,595 INFO L93 Difference]: Finished difference Result 112 states and 199 transitions. [2022-04-05 09:40:35,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 09:40:35,597 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 [2022-04-05 09:40:35,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:40:35,609 INFO L225 Difference]: With dead ends: 112 [2022-04-05 09:40:35,609 INFO L226 Difference]: Without dead ends: 97 [2022-04-05 09:40:35,611 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 [2022-04-05 09:40:35,616 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, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 09:40:35,616 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 113 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 09:40:35,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-04-05 09:40:35,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 67. [2022-04-05 09:40:35,656 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) [2022-04-05 09:40:35,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 122 transitions. [2022-04-05 09:40:35,658 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 122 transitions. Word has length 25 [2022-04-05 09:40:35,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:40:35,659 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 122 transitions. [2022-04-05 09:40:35,659 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) [2022-04-05 09:40:35,659 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 122 transitions. [2022-04-05 09:40:35,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-05 09:40:35,660 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:40:35,660 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] [2022-04-05 09:40:35,661 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 09:40:35,661 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:40:35,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:40:35,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1621019816, now seen corresponding path program 1 times [2022-04-05 09:40:35,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:40:35,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665488364] [2022-04-05 09:40:35,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:40:35,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:40:35,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:35,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 09:40:35,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:35,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 09:40:35,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:40:35,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665488364] [2022-04-05 09:40:35,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665488364] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 09:40:35,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 09:40:35,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 09:40:35,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587375576] [2022-04-05 09:40:35,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 09:40:35,722 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 09:40:35,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:40:35,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 09:40:35,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 09:40:35,724 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) [2022-04-05 09:40:35,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:40:35,832 INFO L93 Difference]: Finished difference Result 158 states and 293 transitions. [2022-04-05 09:40:35,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 09:40:35,832 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 [2022-04-05 09:40:35,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:40:35,833 INFO L225 Difference]: With dead ends: 158 [2022-04-05 09:40:35,834 INFO L226 Difference]: Without dead ends: 97 [2022-04-05 09:40:35,834 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 [2022-04-05 09:40:35,835 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 [2022-04-05 09:40:35,836 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] [2022-04-05 09:40:35,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-04-05 09:40:35,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2022-04-05 09:40:35,844 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) [2022-04-05 09:40:35,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 174 transitions. [2022-04-05 09:40:35,848 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 174 transitions. Word has length 25 [2022-04-05 09:40:35,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:40:35,849 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 174 transitions. [2022-04-05 09:40:35,849 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) [2022-04-05 09:40:35,849 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 174 transitions. [2022-04-05 09:40:35,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-05 09:40:35,850 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:40:35,850 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] [2022-04-05 09:40:35,850 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-05 09:40:35,851 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:40:35,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:40:35,851 INFO L85 PathProgramCache]: Analyzing trace with hash -290888810, now seen corresponding path program 1 times [2022-04-05 09:40:35,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:40:35,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398327568] [2022-04-05 09:40:35,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:40:35,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:40:35,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:35,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 09:40:35,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:35,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 09:40:35,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:40:35,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398327568] [2022-04-05 09:40:35,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398327568] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 09:40:35,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 09:40:35,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 09:40:35,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938594387] [2022-04-05 09:40:35,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 09:40:35,927 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 09:40:35,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:40:35,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 09:40:35,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 09:40:35,928 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) [2022-04-05 09:40:36,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:40:36,021 INFO L93 Difference]: Finished difference Result 145 states and 262 transitions. [2022-04-05 09:40:36,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 09:40:36,021 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 [2022-04-05 09:40:36,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:40:36,022 INFO L225 Difference]: With dead ends: 145 [2022-04-05 09:40:36,023 INFO L226 Difference]: Without dead ends: 100 [2022-04-05 09:40:36,023 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 [2022-04-05 09:40:36,024 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 [2022-04-05 09:40:36,066 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] [2022-04-05 09:40:36,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-04-05 09:40:36,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2022-04-05 09:40:36,074 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) [2022-04-05 09:40:36,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 176 transitions. [2022-04-05 09:40:36,087 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 176 transitions. Word has length 26 [2022-04-05 09:40:36,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:40:36,087 INFO L478 AbstractCegarLoop]: Abstraction has 98 states and 176 transitions. [2022-04-05 09:40:36,088 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) [2022-04-05 09:40:36,088 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 176 transitions. [2022-04-05 09:40:36,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-05 09:40:36,089 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:40:36,089 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] [2022-04-05 09:40:36,089 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-05 09:40:36,089 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:40:36,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:40:36,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1287961163, now seen corresponding path program 1 times [2022-04-05 09:40:36,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:40:36,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520408154] [2022-04-05 09:40:36,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:40:36,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:40:36,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:36,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 09:40:36,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:36,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 09:40:36,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:40:36,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520408154] [2022-04-05 09:40:36,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520408154] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 09:40:36,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 09:40:36,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 09:40:36,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651059627] [2022-04-05 09:40:36,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 09:40:36,150 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 09:40:36,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:40:36,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 09:40:36,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 09:40:36,151 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) [2022-04-05 09:40:36,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:40:36,244 INFO L93 Difference]: Finished difference Result 185 states and 337 transitions. [2022-04-05 09:40:36,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 09:40:36,244 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 [2022-04-05 09:40:36,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:40:36,246 INFO L225 Difference]: With dead ends: 185 [2022-04-05 09:40:36,246 INFO L226 Difference]: Without dead ends: 183 [2022-04-05 09:40:36,246 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 [2022-04-05 09:40:36,247 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 [2022-04-05 09:40:36,248 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] [2022-04-05 09:40:36,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-04-05 09:40:36,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 129. [2022-04-05 09:40:36,255 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) [2022-04-05 09:40:36,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 233 transitions. [2022-04-05 09:40:36,256 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 233 transitions. Word has length 26 [2022-04-05 09:40:36,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:40:36,256 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 233 transitions. [2022-04-05 09:40:36,257 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) [2022-04-05 09:40:36,257 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 233 transitions. [2022-04-05 09:40:36,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-05 09:40:36,258 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:40:36,258 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] [2022-04-05 09:40:36,258 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-05 09:40:36,258 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:40:36,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:40:36,259 INFO L85 PathProgramCache]: Analyzing trace with hash 65348534, now seen corresponding path program 1 times [2022-04-05 09:40:36,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:40:36,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677318468] [2022-04-05 09:40:36,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:40:36,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:40:36,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:36,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 09:40:36,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:36,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 09:40:36,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:40:36,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677318468] [2022-04-05 09:40:36,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677318468] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 09:40:36,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 09:40:36,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 09:40:36,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370079297] [2022-04-05 09:40:36,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 09:40:36,301 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 09:40:36,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:40:36,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 09:40:36,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 09:40:36,302 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) [2022-04-05 09:40:36,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:40:36,393 INFO L93 Difference]: Finished difference Result 305 states and 559 transitions. [2022-04-05 09:40:36,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 09:40:36,393 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 [2022-04-05 09:40:36,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:40:36,395 INFO L225 Difference]: With dead ends: 305 [2022-04-05 09:40:36,395 INFO L226 Difference]: Without dead ends: 185 [2022-04-05 09:40:36,396 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 [2022-04-05 09:40:36,397 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 [2022-04-05 09:40:36,397 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] [2022-04-05 09:40:36,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-04-05 09:40:36,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 183. [2022-04-05 09:40:36,404 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) [2022-04-05 09:40:36,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 331 transitions. [2022-04-05 09:40:36,406 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 331 transitions. Word has length 26 [2022-04-05 09:40:36,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:40:36,406 INFO L478 AbstractCegarLoop]: Abstraction has 183 states and 331 transitions. [2022-04-05 09:40:36,406 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) [2022-04-05 09:40:36,406 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 331 transitions. [2022-04-05 09:40:36,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-05 09:40:36,407 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:40:36,407 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] [2022-04-05 09:40:36,408 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-04-05 09:40:36,408 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:40:36,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:40:36,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1272058172, now seen corresponding path program 1 times [2022-04-05 09:40:36,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:40:36,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93062798] [2022-04-05 09:40:36,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:40:36,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:40:36,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:36,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 09:40:36,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:36,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 09:40:36,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:40:36,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93062798] [2022-04-05 09:40:36,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93062798] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 09:40:36,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 09:40:36,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 09:40:36,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102832992] [2022-04-05 09:40:36,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 09:40:36,446 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 09:40:36,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:40:36,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 09:40:36,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 09:40:36,447 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) [2022-04-05 09:40:36,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:40:36,535 INFO L93 Difference]: Finished difference Result 274 states and 494 transitions. [2022-04-05 09:40:36,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 09:40:36,535 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 [2022-04-05 09:40:36,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:40:36,537 INFO L225 Difference]: With dead ends: 274 [2022-04-05 09:40:36,537 INFO L226 Difference]: Without dead ends: 187 [2022-04-05 09:40:36,537 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 [2022-04-05 09:40:36,538 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 [2022-04-05 09:40:36,539 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] [2022-04-05 09:40:36,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-04-05 09:40:36,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 185. [2022-04-05 09:40:36,545 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) [2022-04-05 09:40:36,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 331 transitions. [2022-04-05 09:40:36,546 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 331 transitions. Word has length 27 [2022-04-05 09:40:36,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:40:36,547 INFO L478 AbstractCegarLoop]: Abstraction has 185 states and 331 transitions. [2022-04-05 09:40:36,547 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) [2022-04-05 09:40:36,547 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 331 transitions. [2022-04-05 09:40:36,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-05 09:40:36,548 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:40:36,548 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] [2022-04-05 09:40:36,548 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-04-05 09:40:36,548 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:40:36,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:40:36,549 INFO L85 PathProgramCache]: Analyzing trace with hash 2025836771, now seen corresponding path program 1 times [2022-04-05 09:40:36,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:40:36,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774120906] [2022-04-05 09:40:36,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:40:36,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:40:36,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:36,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 09:40:36,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:36,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 09:40:36,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:40:36,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774120906] [2022-04-05 09:40:36,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774120906] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 09:40:36,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 09:40:36,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 09:40:36,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72048073] [2022-04-05 09:40:36,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 09:40:36,584 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 09:40:36,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:40:36,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 09:40:36,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 09:40:36,585 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) [2022-04-05 09:40:36,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:40:36,672 INFO L93 Difference]: Finished difference Result 349 states and 633 transitions. [2022-04-05 09:40:36,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 09:40:36,672 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 [2022-04-05 09:40:36,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:40:36,674 INFO L225 Difference]: With dead ends: 349 [2022-04-05 09:40:36,674 INFO L226 Difference]: Without dead ends: 347 [2022-04-05 09:40:36,675 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 [2022-04-05 09:40:36,675 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 [2022-04-05 09:40:36,676 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] [2022-04-05 09:40:36,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-04-05 09:40:36,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 249. [2022-04-05 09:40:36,683 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) [2022-04-05 09:40:36,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 443 transitions. [2022-04-05 09:40:36,685 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 443 transitions. Word has length 27 [2022-04-05 09:40:36,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:40:36,685 INFO L478 AbstractCegarLoop]: Abstraction has 249 states and 443 transitions. [2022-04-05 09:40:36,685 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) [2022-04-05 09:40:36,685 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 443 transitions. [2022-04-05 09:40:36,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-05 09:40:36,686 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:40:36,687 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] [2022-04-05 09:40:36,687 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-04-05 09:40:36,687 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:40:36,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:40:36,687 INFO L85 PathProgramCache]: Analyzing trace with hash -915820828, now seen corresponding path program 1 times [2022-04-05 09:40:36,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:40:36,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169705654] [2022-04-05 09:40:36,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:40:36,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:40:36,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:36,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 09:40:36,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:36,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 09:40:36,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:40:36,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169705654] [2022-04-05 09:40:36,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169705654] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 09:40:36,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 09:40:36,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 09:40:36,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847299022] [2022-04-05 09:40:36,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 09:40:36,722 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 09:40:36,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:40:36,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 09:40:36,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 09:40:36,723 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) [2022-04-05 09:40:36,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:40:36,815 INFO L93 Difference]: Finished difference Result 593 states and 1065 transitions. [2022-04-05 09:40:36,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 09:40:36,815 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 [2022-04-05 09:40:36,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:40:36,817 INFO L225 Difference]: With dead ends: 593 [2022-04-05 09:40:36,817 INFO L226 Difference]: Without dead ends: 355 [2022-04-05 09:40:36,818 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 [2022-04-05 09:40:36,818 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 [2022-04-05 09:40:36,819 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] [2022-04-05 09:40:36,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-04-05 09:40:36,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 353. [2022-04-05 09:40:36,826 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) [2022-04-05 09:40:36,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 627 transitions. [2022-04-05 09:40:36,827 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 627 transitions. Word has length 27 [2022-04-05 09:40:36,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:40:36,828 INFO L478 AbstractCegarLoop]: Abstraction has 353 states and 627 transitions. [2022-04-05 09:40:36,828 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) [2022-04-05 09:40:36,828 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 627 transitions. [2022-04-05 09:40:36,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-05 09:40:36,829 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:40:36,829 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] [2022-04-05 09:40:36,829 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-04-05 09:40:36,829 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:40:36,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:40:36,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1623537198, now seen corresponding path program 1 times [2022-04-05 09:40:36,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:40:36,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361149417] [2022-04-05 09:40:36,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:40:36,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:40:36,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:36,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 09:40:36,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:36,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 09:40:36,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:40:36,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361149417] [2022-04-05 09:40:36,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361149417] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 09:40:36,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 09:40:36,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 09:40:36,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550053271] [2022-04-05 09:40:36,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 09:40:36,862 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 09:40:36,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:40:36,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 09:40:36,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 09:40:36,863 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) [2022-04-05 09:40:36,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:40:36,950 INFO L93 Difference]: Finished difference Result 529 states and 937 transitions. [2022-04-05 09:40:36,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 09:40:36,950 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 [2022-04-05 09:40:36,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:40:36,953 INFO L225 Difference]: With dead ends: 529 [2022-04-05 09:40:36,953 INFO L226 Difference]: Without dead ends: 359 [2022-04-05 09:40:36,953 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 [2022-04-05 09:40:36,955 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 [2022-04-05 09:40:36,955 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] [2022-04-05 09:40:36,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-04-05 09:40:36,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 357. [2022-04-05 09:40:36,965 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) [2022-04-05 09:40:36,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 627 transitions. [2022-04-05 09:40:36,966 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 627 transitions. Word has length 28 [2022-04-05 09:40:36,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:40:36,967 INFO L478 AbstractCegarLoop]: Abstraction has 357 states and 627 transitions. [2022-04-05 09:40:36,967 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) [2022-04-05 09:40:36,967 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 627 transitions. [2022-04-05 09:40:36,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-05 09:40:36,970 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:40:36,970 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] [2022-04-05 09:40:36,970 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-04-05 09:40:36,970 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:40:36,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:40:36,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1674357745, now seen corresponding path program 1 times [2022-04-05 09:40:36,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:40:36,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224559842] [2022-04-05 09:40:36,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:40:36,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:40:36,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:37,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 09:40:37,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:37,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 09:40:37,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:40:37,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224559842] [2022-04-05 09:40:37,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224559842] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 09:40:37,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 09:40:37,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 09:40:37,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988698013] [2022-04-05 09:40:37,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 09:40:37,032 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 09:40:37,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:40:37,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 09:40:37,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 09:40:37,033 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) [2022-04-05 09:40:37,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:40:37,122 INFO L93 Difference]: Finished difference Result 669 states and 1193 transitions. [2022-04-05 09:40:37,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 09:40:37,122 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 [2022-04-05 09:40:37,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:40:37,125 INFO L225 Difference]: With dead ends: 669 [2022-04-05 09:40:37,125 INFO L226 Difference]: Without dead ends: 667 [2022-04-05 09:40:37,125 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 [2022-04-05 09:40:37,126 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 [2022-04-05 09:40:37,126 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] [2022-04-05 09:40:37,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-04-05 09:40:37,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 489. [2022-04-05 09:40:37,137 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) [2022-04-05 09:40:37,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 847 transitions. [2022-04-05 09:40:37,138 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 847 transitions. Word has length 28 [2022-04-05 09:40:37,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:40:37,139 INFO L478 AbstractCegarLoop]: Abstraction has 489 states and 847 transitions. [2022-04-05 09:40:37,139 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) [2022-04-05 09:40:37,139 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 847 transitions. [2022-04-05 09:40:37,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-05 09:40:37,140 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:40:37,140 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] [2022-04-05 09:40:37,140 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-04-05 09:40:37,140 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:40:37,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:40:37,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1267299854, now seen corresponding path program 1 times [2022-04-05 09:40:37,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:40:37,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277523177] [2022-04-05 09:40:37,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:40:37,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:40:37,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:37,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 09:40:37,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:37,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 09:40:37,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:40:37,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277523177] [2022-04-05 09:40:37,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277523177] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 09:40:37,169 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 09:40:37,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 09:40:37,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204346318] [2022-04-05 09:40:37,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 09:40:37,169 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 09:40:37,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:40:37,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 09:40:37,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 09:40:37,182 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) [2022-04-05 09:40:37,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:40:37,276 INFO L93 Difference]: Finished difference Result 1165 states and 2033 transitions. [2022-04-05 09:40:37,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 09:40:37,276 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 [2022-04-05 09:40:37,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:40:37,279 INFO L225 Difference]: With dead ends: 1165 [2022-04-05 09:40:37,279 INFO L226 Difference]: Without dead ends: 691 [2022-04-05 09:40:37,280 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 [2022-04-05 09:40:37,280 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 [2022-04-05 09:40:37,281 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] [2022-04-05 09:40:37,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2022-04-05 09:40:37,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 689. [2022-04-05 09:40:37,294 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) [2022-04-05 09:40:37,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 1191 transitions. [2022-04-05 09:40:37,296 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 1191 transitions. Word has length 28 [2022-04-05 09:40:37,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:40:37,297 INFO L478 AbstractCegarLoop]: Abstraction has 689 states and 1191 transitions. [2022-04-05 09:40:37,297 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) [2022-04-05 09:40:37,297 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 1191 transitions. [2022-04-05 09:40:37,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-05 09:40:37,298 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:40:37,298 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] [2022-04-05 09:40:37,298 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-04-05 09:40:37,298 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:40:37,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:40:37,299 INFO L85 PathProgramCache]: Analyzing trace with hash 365515008, now seen corresponding path program 1 times [2022-04-05 09:40:37,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:40:37,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129925293] [2022-04-05 09:40:37,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:40:37,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:40:37,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:37,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 09:40:37,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:37,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 09:40:37,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:40:37,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129925293] [2022-04-05 09:40:37,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129925293] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 09:40:37,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 09:40:37,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 09:40:37,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809778023] [2022-04-05 09:40:37,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 09:40:37,328 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 09:40:37,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:40:37,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 09:40:37,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 09:40:37,328 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) [2022-04-05 09:40:37,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:40:37,410 INFO L93 Difference]: Finished difference Result 1033 states and 1781 transitions. [2022-04-05 09:40:37,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 09:40:37,410 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 [2022-04-05 09:40:37,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:40:37,412 INFO L225 Difference]: With dead ends: 1033 [2022-04-05 09:40:37,412 INFO L226 Difference]: Without dead ends: 699 [2022-04-05 09:40:37,413 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 [2022-04-05 09:40:37,414 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 [2022-04-05 09:40:37,414 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] [2022-04-05 09:40:37,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2022-04-05 09:40:37,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 697. [2022-04-05 09:40:37,426 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) [2022-04-05 09:40:37,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1191 transitions. [2022-04-05 09:40:37,428 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1191 transitions. Word has length 29 [2022-04-05 09:40:37,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:40:37,428 INFO L478 AbstractCegarLoop]: Abstraction has 697 states and 1191 transitions. [2022-04-05 09:40:37,429 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) [2022-04-05 09:40:37,429 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1191 transitions. [2022-04-05 09:40:37,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-05 09:40:37,429 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:40:37,430 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] [2022-04-05 09:40:37,430 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-04-05 09:40:37,430 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:40:37,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:40:37,430 INFO L85 PathProgramCache]: Analyzing trace with hash -631557345, now seen corresponding path program 1 times [2022-04-05 09:40:37,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:40:37,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67253543] [2022-04-05 09:40:37,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:40:37,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:40:37,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:37,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 09:40:37,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:37,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 09:40:37,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:40:37,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67253543] [2022-04-05 09:40:37,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67253543] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 09:40:37,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 09:40:37,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 09:40:37,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335858805] [2022-04-05 09:40:37,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 09:40:37,457 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 09:40:37,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:40:37,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 09:40:37,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 09:40:37,458 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) [2022-04-05 09:40:37,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:40:37,544 INFO L93 Difference]: Finished difference Result 1293 states and 2249 transitions. [2022-04-05 09:40:37,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 09:40:37,545 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 [2022-04-05 09:40:37,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:40:37,549 INFO L225 Difference]: With dead ends: 1293 [2022-04-05 09:40:37,549 INFO L226 Difference]: Without dead ends: 1291 [2022-04-05 09:40:37,550 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 [2022-04-05 09:40:37,550 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 [2022-04-05 09:40:37,550 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] [2022-04-05 09:40:37,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1291 states. [2022-04-05 09:40:37,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1291 to 969. [2022-04-05 09:40:37,570 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) [2022-04-05 09:40:37,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 1623 transitions. [2022-04-05 09:40:37,574 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 1623 transitions. Word has length 29 [2022-04-05 09:40:37,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:40:37,574 INFO L478 AbstractCegarLoop]: Abstraction has 969 states and 1623 transitions. [2022-04-05 09:40:37,574 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) [2022-04-05 09:40:37,574 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 1623 transitions. [2022-04-05 09:40:37,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-05 09:40:37,575 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:40:37,575 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] [2022-04-05 09:40:37,576 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-04-05 09:40:37,576 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:40:37,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:40:37,576 INFO L85 PathProgramCache]: Analyzing trace with hash 721752352, now seen corresponding path program 1 times [2022-04-05 09:40:37,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:40:37,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644708913] [2022-04-05 09:40:37,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:40:37,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:40:37,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:37,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 09:40:37,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:37,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 09:40:37,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:40:37,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644708913] [2022-04-05 09:40:37,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644708913] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 09:40:37,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 09:40:37,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 09:40:37,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507579920] [2022-04-05 09:40:37,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 09:40:37,604 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 09:40:37,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:40:37,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 09:40:37,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 09:40:37,605 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) [2022-04-05 09:40:37,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:40:37,696 INFO L93 Difference]: Finished difference Result 2301 states and 3881 transitions. [2022-04-05 09:40:37,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 09:40:37,696 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 [2022-04-05 09:40:37,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:40:37,701 INFO L225 Difference]: With dead ends: 2301 [2022-04-05 09:40:37,701 INFO L226 Difference]: Without dead ends: 1355 [2022-04-05 09:40:37,702 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 [2022-04-05 09:40:37,703 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 [2022-04-05 09:40:37,703 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] [2022-04-05 09:40:37,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2022-04-05 09:40:37,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 1353. [2022-04-05 09:40:37,728 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) [2022-04-05 09:40:37,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1353 states to 1353 states and 2263 transitions. [2022-04-05 09:40:37,732 INFO L78 Accepts]: Start accepts. Automaton has 1353 states and 2263 transitions. Word has length 29 [2022-04-05 09:40:37,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:40:37,733 INFO L478 AbstractCegarLoop]: Abstraction has 1353 states and 2263 transitions. [2022-04-05 09:40:37,733 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) [2022-04-05 09:40:37,733 INFO L276 IsEmpty]: Start isEmpty. Operand 1353 states and 2263 transitions. [2022-04-05 09:40:37,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-05 09:40:37,734 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:40:37,734 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] [2022-04-05 09:40:37,734 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-04-05 09:40:37,735 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:40:37,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:40:37,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1896591374, now seen corresponding path program 1 times [2022-04-05 09:40:37,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:40:37,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477159514] [2022-04-05 09:40:37,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:40:37,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:40:37,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:37,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 09:40:37,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:37,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 09:40:37,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:40:37,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477159514] [2022-04-05 09:40:37,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477159514] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 09:40:37,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 09:40:37,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 09:40:37,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558907833] [2022-04-05 09:40:37,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 09:40:37,764 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 09:40:37,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:40:37,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 09:40:37,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 09:40:37,765 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) [2022-04-05 09:40:37,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:40:37,851 INFO L93 Difference]: Finished difference Result 2029 states and 3385 transitions. [2022-04-05 09:40:37,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 09:40:37,852 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 [2022-04-05 09:40:37,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:40:37,856 INFO L225 Difference]: With dead ends: 2029 [2022-04-05 09:40:37,856 INFO L226 Difference]: Without dead ends: 1371 [2022-04-05 09:40:37,858 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 [2022-04-05 09:40:37,858 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 [2022-04-05 09:40:37,858 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] [2022-04-05 09:40:37,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2022-04-05 09:40:37,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1369. [2022-04-05 09:40:37,884 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) [2022-04-05 09:40:37,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 2263 transitions. [2022-04-05 09:40:37,889 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 2263 transitions. Word has length 30 [2022-04-05 09:40:37,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:40:37,889 INFO L478 AbstractCegarLoop]: Abstraction has 1369 states and 2263 transitions. [2022-04-05 09:40:37,889 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) [2022-04-05 09:40:37,889 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 2263 transitions. [2022-04-05 09:40:37,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-05 09:40:37,890 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:40:37,890 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] [2022-04-05 09:40:37,890 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-04-05 09:40:37,891 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:40:37,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:40:37,891 INFO L85 PathProgramCache]: Analyzing trace with hash 899519021, now seen corresponding path program 1 times [2022-04-05 09:40:37,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:40:37,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61934333] [2022-04-05 09:40:37,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:40:37,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:40:37,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:37,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 09:40:37,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:37,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 09:40:37,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:40:37,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61934333] [2022-04-05 09:40:37,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61934333] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 09:40:37,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 09:40:37,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 09:40:37,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713093550] [2022-04-05 09:40:37,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 09:40:37,921 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 09:40:37,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:40:37,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 09:40:37,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 09:40:37,922 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) [2022-04-05 09:40:38,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:40:38,028 INFO L93 Difference]: Finished difference Result 2509 states and 4233 transitions. [2022-04-05 09:40:38,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 09:40:38,028 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 [2022-04-05 09:40:38,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:40:38,036 INFO L225 Difference]: With dead ends: 2509 [2022-04-05 09:40:38,036 INFO L226 Difference]: Without dead ends: 2507 [2022-04-05 09:40:38,039 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 [2022-04-05 09:40:38,039 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 [2022-04-05 09:40:38,039 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] [2022-04-05 09:40:38,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2507 states. [2022-04-05 09:40:38,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2507 to 1929. [2022-04-05 09:40:38,080 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) [2022-04-05 09:40:38,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1929 states to 1929 states and 3111 transitions. [2022-04-05 09:40:38,087 INFO L78 Accepts]: Start accepts. Automaton has 1929 states and 3111 transitions. Word has length 30 [2022-04-05 09:40:38,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:40:38,087 INFO L478 AbstractCegarLoop]: Abstraction has 1929 states and 3111 transitions. [2022-04-05 09:40:38,087 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) [2022-04-05 09:40:38,087 INFO L276 IsEmpty]: Start isEmpty. Operand 1929 states and 3111 transitions. [2022-04-05 09:40:38,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-05 09:40:38,089 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:40:38,089 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] [2022-04-05 09:40:38,089 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-04-05 09:40:38,090 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:40:38,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:40:38,090 INFO L85 PathProgramCache]: Analyzing trace with hash -2042138578, now seen corresponding path program 1 times [2022-04-05 09:40:38,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:40:38,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883689021] [2022-04-05 09:40:38,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:40:38,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:40:38,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:38,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 09:40:38,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:38,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 09:40:38,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:40:38,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883689021] [2022-04-05 09:40:38,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883689021] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 09:40:38,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 09:40:38,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 09:40:38,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321669716] [2022-04-05 09:40:38,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 09:40:38,138 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 09:40:38,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:40:38,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 09:40:38,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 09:40:38,139 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) [2022-04-05 09:40:38,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:40:38,248 INFO L93 Difference]: Finished difference Result 4557 states and 7401 transitions. [2022-04-05 09:40:38,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 09:40:38,249 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 [2022-04-05 09:40:38,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:40:38,257 INFO L225 Difference]: With dead ends: 4557 [2022-04-05 09:40:38,257 INFO L226 Difference]: Without dead ends: 2667 [2022-04-05 09:40:38,260 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 [2022-04-05 09:40:38,261 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 [2022-04-05 09:40:38,262 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] [2022-04-05 09:40:38,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2667 states. [2022-04-05 09:40:38,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2667 to 2665. [2022-04-05 09:40:38,317 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) [2022-04-05 09:40:38,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2665 states to 2665 states and 4295 transitions. [2022-04-05 09:40:38,326 INFO L78 Accepts]: Start accepts. Automaton has 2665 states and 4295 transitions. Word has length 30 [2022-04-05 09:40:38,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:40:38,326 INFO L478 AbstractCegarLoop]: Abstraction has 2665 states and 4295 transitions. [2022-04-05 09:40:38,326 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) [2022-04-05 09:40:38,326 INFO L276 IsEmpty]: Start isEmpty. Operand 2665 states and 4295 transitions. [2022-04-05 09:40:38,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-05 09:40:38,329 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:40:38,329 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] [2022-04-05 09:40:38,329 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-04-05 09:40:38,329 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:40:38,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:40:38,331 INFO L85 PathProgramCache]: Analyzing trace with hash 2115318588, now seen corresponding path program 1 times [2022-04-05 09:40:38,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:40:38,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74225039] [2022-04-05 09:40:38,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:40:38,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:40:38,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:38,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 09:40:38,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:38,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 09:40:38,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:40:38,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74225039] [2022-04-05 09:40:38,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74225039] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 09:40:38,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 09:40:38,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 09:40:38,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451084329] [2022-04-05 09:40:38,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 09:40:38,372 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 09:40:38,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:40:38,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 09:40:38,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 09:40:38,373 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) [2022-04-05 09:40:38,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:40:38,482 INFO L93 Difference]: Finished difference Result 3997 states and 6425 transitions. [2022-04-05 09:40:38,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 09:40:38,483 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 [2022-04-05 09:40:38,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:40:38,491 INFO L225 Difference]: With dead ends: 3997 [2022-04-05 09:40:38,491 INFO L226 Difference]: Without dead ends: 2699 [2022-04-05 09:40:38,493 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 [2022-04-05 09:40:38,494 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 [2022-04-05 09:40:38,494 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] [2022-04-05 09:40:38,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2699 states. [2022-04-05 09:40:38,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2699 to 2697. [2022-04-05 09:40:38,558 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) [2022-04-05 09:40:38,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2697 states to 2697 states and 4295 transitions. [2022-04-05 09:40:38,612 INFO L78 Accepts]: Start accepts. Automaton has 2697 states and 4295 transitions. Word has length 31 [2022-04-05 09:40:38,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:40:38,612 INFO L478 AbstractCegarLoop]: Abstraction has 2697 states and 4295 transitions. [2022-04-05 09:40:38,612 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) [2022-04-05 09:40:38,612 INFO L276 IsEmpty]: Start isEmpty. Operand 2697 states and 4295 transitions. [2022-04-05 09:40:38,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-05 09:40:38,614 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:40:38,614 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] [2022-04-05 09:40:38,615 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-04-05 09:40:38,615 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:40:38,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:40:38,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1118246235, now seen corresponding path program 1 times [2022-04-05 09:40:38,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:40:38,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94927430] [2022-04-05 09:40:38,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:40:38,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:40:38,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:38,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 09:40:38,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:38,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 09:40:38,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:40:38,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94927430] [2022-04-05 09:40:38,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94927430] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 09:40:38,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 09:40:38,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 09:40:38,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881326763] [2022-04-05 09:40:38,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 09:40:38,653 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 09:40:38,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:40:38,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 09:40:38,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 09:40:38,653 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) [2022-04-05 09:40:38,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:40:38,778 INFO L93 Difference]: Finished difference Result 4877 states and 7945 transitions. [2022-04-05 09:40:38,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 09:40:38,779 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 [2022-04-05 09:40:38,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:40:38,793 INFO L225 Difference]: With dead ends: 4877 [2022-04-05 09:40:38,793 INFO L226 Difference]: Without dead ends: 4875 [2022-04-05 09:40:38,795 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 [2022-04-05 09:40:38,796 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 [2022-04-05 09:40:38,796 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] [2022-04-05 09:40:38,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4875 states. [2022-04-05 09:40:38,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4875 to 3849. [2022-04-05 09:40:38,886 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) [2022-04-05 09:40:38,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3849 states to 3849 states and 5959 transitions. [2022-04-05 09:40:38,898 INFO L78 Accepts]: Start accepts. Automaton has 3849 states and 5959 transitions. Word has length 31 [2022-04-05 09:40:38,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:40:38,898 INFO L478 AbstractCegarLoop]: Abstraction has 3849 states and 5959 transitions. [2022-04-05 09:40:38,899 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) [2022-04-05 09:40:38,899 INFO L276 IsEmpty]: Start isEmpty. Operand 3849 states and 5959 transitions. [2022-04-05 09:40:38,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-05 09:40:38,903 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:40:38,903 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] [2022-04-05 09:40:38,903 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-04-05 09:40:38,903 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:40:38,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:40:38,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1823411364, now seen corresponding path program 1 times [2022-04-05 09:40:38,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:40:38,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510597278] [2022-04-05 09:40:38,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:40:38,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:40:38,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:38,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 09:40:38,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:38,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 09:40:38,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:40:38,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510597278] [2022-04-05 09:40:38,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510597278] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 09:40:38,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 09:40:38,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 09:40:38,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642463977] [2022-04-05 09:40:38,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 09:40:38,927 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 09:40:38,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:40:38,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 09:40:38,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 09:40:38,928 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) [2022-04-05 09:40:39,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:40:39,062 INFO L93 Difference]: Finished difference Result 9037 states and 14089 transitions. [2022-04-05 09:40:39,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 09:40:39,062 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 [2022-04-05 09:40:39,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:40:39,091 INFO L225 Difference]: With dead ends: 9037 [2022-04-05 09:40:39,091 INFO L226 Difference]: Without dead ends: 5259 [2022-04-05 09:40:39,097 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 [2022-04-05 09:40:39,098 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 [2022-04-05 09:40:39,099 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] [2022-04-05 09:40:39,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5259 states. [2022-04-05 09:40:39,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5259 to 5257. [2022-04-05 09:40:39,270 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) [2022-04-05 09:40:39,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5257 states to 5257 states and 8135 transitions. [2022-04-05 09:40:39,283 INFO L78 Accepts]: Start accepts. Automaton has 5257 states and 8135 transitions. Word has length 31 [2022-04-05 09:40:39,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:40:39,283 INFO L478 AbstractCegarLoop]: Abstraction has 5257 states and 8135 transitions. [2022-04-05 09:40:39,283 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) [2022-04-05 09:40:39,283 INFO L276 IsEmpty]: Start isEmpty. Operand 5257 states and 8135 transitions. [2022-04-05 09:40:39,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-05 09:40:39,290 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:40:39,290 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] [2022-04-05 09:40:39,291 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-04-05 09:40:39,291 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:40:39,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:40:39,292 INFO L85 PathProgramCache]: Analyzing trace with hash 305927754, now seen corresponding path program 1 times [2022-04-05 09:40:39,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:40:39,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644187734] [2022-04-05 09:40:39,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:40:39,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:40:39,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:39,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 09:40:39,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:39,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 09:40:39,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:40:39,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644187734] [2022-04-05 09:40:39,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644187734] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 09:40:39,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 09:40:39,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 09:40:39,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861086096] [2022-04-05 09:40:39,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 09:40:39,319 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 09:40:39,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:40:39,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 09:40:39,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 09:40:39,320 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) [2022-04-05 09:40:39,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:40:39,451 INFO L93 Difference]: Finished difference Result 7885 states and 12169 transitions. [2022-04-05 09:40:39,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 09:40:39,452 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 [2022-04-05 09:40:39,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:40:39,462 INFO L225 Difference]: With dead ends: 7885 [2022-04-05 09:40:39,462 INFO L226 Difference]: Without dead ends: 5323 [2022-04-05 09:40:39,467 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 [2022-04-05 09:40:39,469 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 [2022-04-05 09:40:39,469 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] [2022-04-05 09:40:39,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5323 states. [2022-04-05 09:40:39,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5323 to 5321. [2022-04-05 09:40:39,575 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) [2022-04-05 09:40:39,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5321 states to 5321 states and 8135 transitions. [2022-04-05 09:40:39,589 INFO L78 Accepts]: Start accepts. Automaton has 5321 states and 8135 transitions. Word has length 32 [2022-04-05 09:40:39,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:40:39,589 INFO L478 AbstractCegarLoop]: Abstraction has 5321 states and 8135 transitions. [2022-04-05 09:40:39,590 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) [2022-04-05 09:40:39,590 INFO L276 IsEmpty]: Start isEmpty. Operand 5321 states and 8135 transitions. [2022-04-05 09:40:39,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-05 09:40:39,595 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:40:39,595 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] [2022-04-05 09:40:39,595 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-04-05 09:40:39,595 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:40:39,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:40:39,596 INFO L85 PathProgramCache]: Analyzing trace with hash -691144599, now seen corresponding path program 1 times [2022-04-05 09:40:39,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:40:39,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569759584] [2022-04-05 09:40:39,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:40:39,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:40:39,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:39,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 09:40:39,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:39,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 09:40:39,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:40:39,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569759584] [2022-04-05 09:40:39,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569759584] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 09:40:39,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 09:40:39,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 09:40:39,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870582364] [2022-04-05 09:40:39,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 09:40:39,629 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 09:40:39,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:40:39,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 09:40:39,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 09:40:39,630 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) [2022-04-05 09:40:39,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:40:39,836 INFO L93 Difference]: Finished difference Result 9485 states and 14857 transitions. [2022-04-05 09:40:39,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 09:40:39,837 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 [2022-04-05 09:40:39,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:40:39,851 INFO L225 Difference]: With dead ends: 9485 [2022-04-05 09:40:39,851 INFO L226 Difference]: Without dead ends: 9483 [2022-04-05 09:40:39,853 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 [2022-04-05 09:40:39,854 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 [2022-04-05 09:40:39,854 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] [2022-04-05 09:40:39,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9483 states. [2022-04-05 09:40:39,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9483 to 7689. [2022-04-05 09:40:39,995 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) [2022-04-05 09:40:40,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7689 states to 7689 states and 11399 transitions. [2022-04-05 09:40:40,015 INFO L78 Accepts]: Start accepts. Automaton has 7689 states and 11399 transitions. Word has length 32 [2022-04-05 09:40:40,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:40:40,015 INFO L478 AbstractCegarLoop]: Abstraction has 7689 states and 11399 transitions. [2022-04-05 09:40:40,016 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) [2022-04-05 09:40:40,016 INFO L276 IsEmpty]: Start isEmpty. Operand 7689 states and 11399 transitions. [2022-04-05 09:40:40,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-05 09:40:40,025 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:40:40,025 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] [2022-04-05 09:40:40,025 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-04-05 09:40:40,025 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:40:40,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:40:40,025 INFO L85 PathProgramCache]: Analyzing trace with hash 662165098, now seen corresponding path program 1 times [2022-04-05 09:40:40,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:40:40,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599436098] [2022-04-05 09:40:40,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:40:40,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:40:40,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:40,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 09:40:40,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:40,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 09:40:40,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:40:40,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599436098] [2022-04-05 09:40:40,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599436098] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 09:40:40,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 09:40:40,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 09:40:40,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752166514] [2022-04-05 09:40:40,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 09:40:40,052 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 09:40:40,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:40:40,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 09:40:40,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 09:40:40,053 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) [2022-04-05 09:40:40,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:40:40,237 INFO L93 Difference]: Finished difference Result 17933 states and 26761 transitions. [2022-04-05 09:40:40,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 09:40:40,238 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 [2022-04-05 09:40:40,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:40:40,258 INFO L225 Difference]: With dead ends: 17933 [2022-04-05 09:40:40,258 INFO L226 Difference]: Without dead ends: 10379 [2022-04-05 09:40:40,275 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 [2022-04-05 09:40:40,277 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 [2022-04-05 09:40:40,277 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] [2022-04-05 09:40:40,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10379 states. [2022-04-05 09:40:40,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10379 to 10377. [2022-04-05 09:40:40,490 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) [2022-04-05 09:40:40,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10377 states to 10377 states and 15367 transitions. [2022-04-05 09:40:40,517 INFO L78 Accepts]: Start accepts. Automaton has 10377 states and 15367 transitions. Word has length 32 [2022-04-05 09:40:40,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:40:40,517 INFO L478 AbstractCegarLoop]: Abstraction has 10377 states and 15367 transitions. [2022-04-05 09:40:40,517 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) [2022-04-05 09:40:40,517 INFO L276 IsEmpty]: Start isEmpty. Operand 10377 states and 15367 transitions. [2022-04-05 09:40:40,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-05 09:40:40,526 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:40:40,527 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] [2022-04-05 09:40:40,527 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-04-05 09:40:40,527 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:40:40,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:40:40,527 INFO L85 PathProgramCache]: Analyzing trace with hash 49386872, now seen corresponding path program 1 times [2022-04-05 09:40:40,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:40:40,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415909155] [2022-04-05 09:40:40,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:40:40,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:40:40,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:40,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 09:40:40,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:40,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 09:40:40,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:40:40,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415909155] [2022-04-05 09:40:40,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415909155] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 09:40:40,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 09:40:40,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 09:40:40,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752774320] [2022-04-05 09:40:40,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 09:40:40,560 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 09:40:40,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:40:40,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 09:40:40,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 09:40:40,561 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) [2022-04-05 09:40:40,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:40:40,765 INFO L93 Difference]: Finished difference Result 15565 states and 22985 transitions. [2022-04-05 09:40:40,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 09:40:40,766 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 [2022-04-05 09:40:40,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:40:40,782 INFO L225 Difference]: With dead ends: 15565 [2022-04-05 09:40:40,782 INFO L226 Difference]: Without dead ends: 10507 [2022-04-05 09:40:40,790 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 [2022-04-05 09:40:40,791 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 [2022-04-05 09:40:40,791 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] [2022-04-05 09:40:40,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10507 states. [2022-04-05 09:40:41,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10507 to 10505. [2022-04-05 09:40:41,023 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) [2022-04-05 09:40:41,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10505 states to 10505 states and 15367 transitions. [2022-04-05 09:40:41,046 INFO L78 Accepts]: Start accepts. Automaton has 10505 states and 15367 transitions. Word has length 33 [2022-04-05 09:40:41,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:40:41,046 INFO L478 AbstractCegarLoop]: Abstraction has 10505 states and 15367 transitions. [2022-04-05 09:40:41,046 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) [2022-04-05 09:40:41,047 INFO L276 IsEmpty]: Start isEmpty. Operand 10505 states and 15367 transitions. [2022-04-05 09:40:41,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-05 09:40:41,056 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:40:41,056 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] [2022-04-05 09:40:41,056 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-04-05 09:40:41,056 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:40:41,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:40:41,057 INFO L85 PathProgramCache]: Analyzing trace with hash -947685481, now seen corresponding path program 1 times [2022-04-05 09:40:41,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:40:41,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90990542] [2022-04-05 09:40:41,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:40:41,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:40:41,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:41,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 09:40:41,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:41,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 09:40:41,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:40:41,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90990542] [2022-04-05 09:40:41,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90990542] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 09:40:41,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 09:40:41,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 09:40:41,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637380903] [2022-04-05 09:40:41,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 09:40:41,081 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 09:40:41,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:40:41,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 09:40:41,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 09:40:41,082 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) [2022-04-05 09:40:41,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:40:41,306 INFO L93 Difference]: Finished difference Result 18445 states and 27657 transitions. [2022-04-05 09:40:41,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 09:40:41,306 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 [2022-04-05 09:40:41,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:40:41,342 INFO L225 Difference]: With dead ends: 18445 [2022-04-05 09:40:41,342 INFO L226 Difference]: Without dead ends: 18443 [2022-04-05 09:40:41,352 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 [2022-04-05 09:40:41,352 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 [2022-04-05 09:40:41,353 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] [2022-04-05 09:40:41,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18443 states. [2022-04-05 09:40:41,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18443 to 15369. [2022-04-05 09:40:41,668 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) [2022-04-05 09:40:41,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15369 states to 15369 states and 21767 transitions. [2022-04-05 09:40:41,700 INFO L78 Accepts]: Start accepts. Automaton has 15369 states and 21767 transitions. Word has length 33 [2022-04-05 09:40:41,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:40:41,700 INFO L478 AbstractCegarLoop]: Abstraction has 15369 states and 21767 transitions. [2022-04-05 09:40:41,701 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) [2022-04-05 09:40:41,701 INFO L276 IsEmpty]: Start isEmpty. Operand 15369 states and 21767 transitions. [2022-04-05 09:40:41,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-05 09:40:41,718 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:40:41,718 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] [2022-04-05 09:40:41,718 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-04-05 09:40:41,719 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:40:41,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:40:41,719 INFO L85 PathProgramCache]: Analyzing trace with hash 405624216, now seen corresponding path program 1 times [2022-04-05 09:40:41,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:40:41,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150092591] [2022-04-05 09:40:41,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:40:41,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:40:41,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:41,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 09:40:41,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:41,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 09:40:41,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:40:41,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150092591] [2022-04-05 09:40:41,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150092591] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 09:40:41,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 09:40:41,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 09:40:41,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252490256] [2022-04-05 09:40:41,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 09:40:41,741 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 09:40:41,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:40:41,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 09:40:41,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 09:40:41,742 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) [2022-04-05 09:40:42,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:40:42,057 INFO L93 Difference]: Finished difference Result 35597 states and 50697 transitions. [2022-04-05 09:40:42,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 09:40:42,058 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 [2022-04-05 09:40:42,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:40:42,096 INFO L225 Difference]: With dead ends: 35597 [2022-04-05 09:40:42,096 INFO L226 Difference]: Without dead ends: 20491 [2022-04-05 09:40:42,120 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 [2022-04-05 09:40:42,121 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 [2022-04-05 09:40:42,122 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] [2022-04-05 09:40:42,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20491 states. [2022-04-05 09:40:42,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20491 to 20489. [2022-04-05 09:40:42,456 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) [2022-04-05 09:40:42,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20489 states to 20489 states and 28935 transitions. [2022-04-05 09:40:42,657 INFO L78 Accepts]: Start accepts. Automaton has 20489 states and 28935 transitions. Word has length 33 [2022-04-05 09:40:42,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:40:42,657 INFO L478 AbstractCegarLoop]: Abstraction has 20489 states and 28935 transitions. [2022-04-05 09:40:42,657 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) [2022-04-05 09:40:42,657 INFO L276 IsEmpty]: Start isEmpty. Operand 20489 states and 28935 transitions. [2022-04-05 09:40:42,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-05 09:40:42,673 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:40:42,673 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] [2022-04-05 09:40:42,673 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-04-05 09:40:42,674 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:40:42,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:40:42,674 INFO L85 PathProgramCache]: Analyzing trace with hash 686554246, now seen corresponding path program 1 times [2022-04-05 09:40:42,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:40:42,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978079705] [2022-04-05 09:40:42,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:40:42,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:40:42,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:42,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 09:40:42,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:42,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 09:40:42,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:40:42,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978079705] [2022-04-05 09:40:42,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978079705] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 09:40:42,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 09:40:42,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 09:40:42,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462903075] [2022-04-05 09:40:42,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 09:40:42,701 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 09:40:42,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:40:42,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 09:40:42,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 09:40:42,702 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) [2022-04-05 09:40:43,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:40:43,045 INFO L93 Difference]: Finished difference Result 30733 states and 43273 transitions. [2022-04-05 09:40:43,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 09:40:43,046 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 [2022-04-05 09:40:43,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:40:43,087 INFO L225 Difference]: With dead ends: 30733 [2022-04-05 09:40:43,087 INFO L226 Difference]: Without dead ends: 20747 [2022-04-05 09:40:43,110 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-05 09:40:43,111 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 [2022-04-05 09:40:43,112 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] [2022-04-05 09:40:43,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20747 states. [2022-04-05 09:40:43,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20747 to 20745. [2022-04-05 09:40:43,524 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) [2022-04-05 09:40:43,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20745 states to 20745 states and 28935 transitions. [2022-04-05 09:40:43,563 INFO L78 Accepts]: Start accepts. Automaton has 20745 states and 28935 transitions. Word has length 34 [2022-04-05 09:40:43,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:40:43,563 INFO L478 AbstractCegarLoop]: Abstraction has 20745 states and 28935 transitions. [2022-04-05 09:40:43,563 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) [2022-04-05 09:40:43,563 INFO L276 IsEmpty]: Start isEmpty. Operand 20745 states and 28935 transitions. [2022-04-05 09:40:43,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-05 09:40:43,582 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:40:43,582 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] [2022-04-05 09:40:43,582 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-04-05 09:40:43,582 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:40:43,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:40:43,583 INFO L85 PathProgramCache]: Analyzing trace with hash -310518107, now seen corresponding path program 1 times [2022-04-05 09:40:43,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:40:43,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882064010] [2022-04-05 09:40:43,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:40:43,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:40:43,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:43,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 09:40:43,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:43,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 09:40:43,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:40:43,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882064010] [2022-04-05 09:40:43,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882064010] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 09:40:43,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 09:40:43,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 09:40:43,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660681844] [2022-04-05 09:40:43,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 09:40:43,606 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 09:40:43,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:40:43,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 09:40:43,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 09:40:43,607 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) [2022-04-05 09:40:44,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:40:44,088 INFO L93 Difference]: Finished difference Result 35853 states and 51209 transitions. [2022-04-05 09:40:44,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 09:40:44,089 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 [2022-04-05 09:40:44,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:40:44,156 INFO L225 Difference]: With dead ends: 35853 [2022-04-05 09:40:44,156 INFO L226 Difference]: Without dead ends: 35851 [2022-04-05 09:40:44,163 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 [2022-04-05 09:40:44,164 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 [2022-04-05 09:40:44,164 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] [2022-04-05 09:40:44,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35851 states. [2022-04-05 09:40:44,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35851 to 30729. [2022-04-05 09:40:44,684 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) [2022-04-05 09:40:44,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30729 states to 30729 states and 41479 transitions. [2022-04-05 09:40:44,747 INFO L78 Accepts]: Start accepts. Automaton has 30729 states and 41479 transitions. Word has length 34 [2022-04-05 09:40:44,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:40:44,747 INFO L478 AbstractCegarLoop]: Abstraction has 30729 states and 41479 transitions. [2022-04-05 09:40:44,748 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) [2022-04-05 09:40:44,748 INFO L276 IsEmpty]: Start isEmpty. Operand 30729 states and 41479 transitions. [2022-04-05 09:40:44,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-05 09:40:44,788 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:40:44,788 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] [2022-04-05 09:40:44,789 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-04-05 09:40:44,789 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:40:44,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:40:44,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1042791590, now seen corresponding path program 1 times [2022-04-05 09:40:44,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:40:44,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400913130] [2022-04-05 09:40:44,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:40:44,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:40:44,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:44,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 09:40:44,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:44,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 09:40:44,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:40:44,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400913130] [2022-04-05 09:40:44,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400913130] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 09:40:44,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 09:40:44,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 09:40:44,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217185306] [2022-04-05 09:40:44,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 09:40:44,832 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 09:40:44,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:40:44,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 09:40:44,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 09:40:44,833 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) [2022-04-05 09:40:45,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:40:45,471 INFO L93 Difference]: Finished difference Result 70669 states and 95753 transitions. [2022-04-05 09:40:45,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 09:40:45,472 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 [2022-04-05 09:40:45,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:40:45,534 INFO L225 Difference]: With dead ends: 70669 [2022-04-05 09:40:45,535 INFO L226 Difference]: Without dead ends: 40459 [2022-04-05 09:40:45,646 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 [2022-04-05 09:40:45,646 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, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 09:40:45,647 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 145 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 09:40:45,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40459 states. [2022-04-05 09:40:46,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40459 to 40457. [2022-04-05 09:40:46,537 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) [2022-04-05 09:40:46,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40457 states to 40457 states and 54279 transitions. [2022-04-05 09:40:46,622 INFO L78 Accepts]: Start accepts. Automaton has 40457 states and 54279 transitions. Word has length 34 [2022-04-05 09:40:46,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:40:46,623 INFO L478 AbstractCegarLoop]: Abstraction has 40457 states and 54279 transitions. [2022-04-05 09:40:46,623 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) [2022-04-05 09:40:46,623 INFO L276 IsEmpty]: Start isEmpty. Operand 40457 states and 54279 transitions. [2022-04-05 09:40:46,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-05 09:40:46,647 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:40:46,647 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] [2022-04-05 09:40:46,647 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-04-05 09:40:46,647 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:40:46,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:40:46,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1036093516, now seen corresponding path program 1 times [2022-04-05 09:40:46,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:40:46,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451557228] [2022-04-05 09:40:46,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:40:46,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:40:46,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:46,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 09:40:46,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:46,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 09:40:46,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:40:46,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451557228] [2022-04-05 09:40:46,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451557228] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 09:40:46,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 09:40:46,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 09:40:46,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699542331] [2022-04-05 09:40:46,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 09:40:46,672 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 09:40:46,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:40:46,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 09:40:46,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 09:40:46,673 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) [2022-04-05 09:40:47,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:40:47,136 INFO L93 Difference]: Finished difference Result 60685 states and 81161 transitions. [2022-04-05 09:40:47,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 09:40:47,136 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 [2022-04-05 09:40:47,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:40:47,200 INFO L225 Difference]: With dead ends: 60685 [2022-04-05 09:40:47,201 INFO L226 Difference]: Without dead ends: 40971 [2022-04-05 09:40:47,228 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 [2022-04-05 09:40:47,229 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 [2022-04-05 09:40:47,229 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] [2022-04-05 09:40:47,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40971 states. [2022-04-05 09:40:48,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40971 to 40969. [2022-04-05 09:40:48,102 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) [2022-04-05 09:40:48,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40969 states to 40969 states and 54279 transitions. [2022-04-05 09:40:48,187 INFO L78 Accepts]: Start accepts. Automaton has 40969 states and 54279 transitions. Word has length 35 [2022-04-05 09:40:48,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:40:48,187 INFO L478 AbstractCegarLoop]: Abstraction has 40969 states and 54279 transitions. [2022-04-05 09:40:48,187 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) [2022-04-05 09:40:48,187 INFO L276 IsEmpty]: Start isEmpty. Operand 40969 states and 54279 transitions. [2022-04-05 09:40:48,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-05 09:40:48,214 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:40:48,214 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] [2022-04-05 09:40:48,215 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-04-05 09:40:48,215 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:40:48,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:40:48,215 INFO L85 PathProgramCache]: Analyzing trace with hash -2033165869, now seen corresponding path program 1 times [2022-04-05 09:40:48,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:40:48,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117299392] [2022-04-05 09:40:48,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:40:48,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:40:48,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:48,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 09:40:48,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:48,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 09:40:48,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:40:48,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117299392] [2022-04-05 09:40:48,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117299392] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 09:40:48,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 09:40:48,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 09:40:48,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123632052] [2022-04-05 09:40:48,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 09:40:48,251 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 09:40:48,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:40:48,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 09:40:48,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 09:40:48,251 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) [2022-04-05 09:40:49,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:40:49,026 INFO L93 Difference]: Finished difference Result 69645 states and 94217 transitions. [2022-04-05 09:40:49,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 09:40:49,027 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-04-05 09:40:49,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:40:49,113 INFO L225 Difference]: With dead ends: 69645 [2022-04-05 09:40:49,114 INFO L226 Difference]: Without dead ends: 69643 [2022-04-05 09:40:49,127 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-05 09:40:49,129 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 [2022-04-05 09:40:49,129 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] [2022-04-05 09:40:49,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69643 states. [2022-04-05 09:40:50,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69643 to 61449. [2022-04-05 09:40:50,107 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) [2022-04-05 09:40:50,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61449 states to 61449 states and 78855 transitions. [2022-04-05 09:40:50,209 INFO L78 Accepts]: Start accepts. Automaton has 61449 states and 78855 transitions. Word has length 35 [2022-04-05 09:40:50,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:40:50,209 INFO L478 AbstractCegarLoop]: Abstraction has 61449 states and 78855 transitions. [2022-04-05 09:40:50,210 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) [2022-04-05 09:40:50,210 INFO L276 IsEmpty]: Start isEmpty. Operand 61449 states and 78855 transitions. [2022-04-05 09:40:50,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-05 09:40:50,265 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:40:50,265 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] [2022-04-05 09:40:50,265 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-04-05 09:40:50,265 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:40:50,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:40:50,266 INFO L85 PathProgramCache]: Analyzing trace with hash -679856172, now seen corresponding path program 1 times [2022-04-05 09:40:50,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:40:50,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904482120] [2022-04-05 09:40:50,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:40:50,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:40:50,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:50,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 09:40:50,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:50,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 09:40:50,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:40:50,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904482120] [2022-04-05 09:40:50,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904482120] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 09:40:50,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 09:40:50,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 09:40:50,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347565380] [2022-04-05 09:40:50,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 09:40:50,289 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 09:40:50,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:40:50,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 09:40:50,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 09:40:50,290 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) [2022-04-05 09:40:51,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:40:51,282 INFO L93 Difference]: Finished difference Result 140301 states and 180233 transitions. [2022-04-05 09:40:51,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 09:40:51,282 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 [2022-04-05 09:40:51,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:40:51,587 INFO L225 Difference]: With dead ends: 140301 [2022-04-05 09:40:51,587 INFO L226 Difference]: Without dead ends: 79883 [2022-04-05 09:40:51,638 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 [2022-04-05 09:40:51,638 INFO L913 BasicCegarLoop]: 140 mSDtfsCounter, 148 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 09:40:51,639 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 147 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 09:40:51,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79883 states. [2022-04-05 09:40:52,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79883 to 79881. [2022-04-05 09:40:52,885 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) [2022-04-05 09:40:53,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79881 states to 79881 states and 101383 transitions. [2022-04-05 09:40:53,002 INFO L78 Accepts]: Start accepts. Automaton has 79881 states and 101383 transitions. Word has length 35 [2022-04-05 09:40:53,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:40:53,003 INFO L478 AbstractCegarLoop]: Abstraction has 79881 states and 101383 transitions. [2022-04-05 09:40:53,003 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) [2022-04-05 09:40:53,003 INFO L276 IsEmpty]: Start isEmpty. Operand 79881 states and 101383 transitions. [2022-04-05 09:40:53,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-05 09:40:53,049 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:40:53,049 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:40:53,049 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-04-05 09:40:53,049 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:40:53,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:40:53,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1396400834, now seen corresponding path program 1 times [2022-04-05 09:40:53,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:40:53,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095997293] [2022-04-05 09:40:53,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:40:53,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:40:53,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:53,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 09:40:53,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:53,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 09:40:53,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:40:53,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095997293] [2022-04-05 09:40:53,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095997293] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 09:40:53,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 09:40:53,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 09:40:53,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480176535] [2022-04-05 09:40:53,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 09:40:53,072 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 09:40:53,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:40:53,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 09:40:53,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 09:40:53,073 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) [2022-04-05 09:40:53,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:40:53,975 INFO L93 Difference]: Finished difference Result 119821 states and 151561 transitions. [2022-04-05 09:40:53,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 09:40:53,976 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 [2022-04-05 09:40:53,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:40:54,113 INFO L225 Difference]: With dead ends: 119821 [2022-04-05 09:40:54,114 INFO L226 Difference]: Without dead ends: 80907 [2022-04-05 09:40:54,157 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 [2022-04-05 09:40:54,159 INFO L913 BasicCegarLoop]: 116 mSDtfsCounter, 173 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-04-05 09:40:54,159 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] [2022-04-05 09:40:54,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80907 states. [2022-04-05 09:40:55,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80907 to 80905. [2022-04-05 09:40:55,425 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) [2022-04-05 09:40:55,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80905 states to 80905 states and 101383 transitions. [2022-04-05 09:40:55,539 INFO L78 Accepts]: Start accepts. Automaton has 80905 states and 101383 transitions. Word has length 36 [2022-04-05 09:40:55,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:40:55,539 INFO L478 AbstractCegarLoop]: Abstraction has 80905 states and 101383 transitions. [2022-04-05 09:40:55,539 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) [2022-04-05 09:40:55,539 INFO L276 IsEmpty]: Start isEmpty. Operand 80905 states and 101383 transitions. [2022-04-05 09:40:55,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-05 09:40:55,586 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:40:55,586 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] [2022-04-05 09:40:55,586 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-04-05 09:40:55,586 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:40:55,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:40:55,586 INFO L85 PathProgramCache]: Analyzing trace with hash 399328481, now seen corresponding path program 1 times [2022-04-05 09:40:55,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:40:55,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978873695] [2022-04-05 09:40:55,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:40:55,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:40:55,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:55,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 09:40:55,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:55,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 09:40:55,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:40:55,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978873695] [2022-04-05 09:40:55,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978873695] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 09:40:55,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 09:40:55,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 09:40:55,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339198342] [2022-04-05 09:40:55,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 09:40:55,611 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 09:40:55,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:40:55,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 09:40:55,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 09:40:55,611 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) [2022-04-05 09:40:56,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:40:56,951 INFO L93 Difference]: Finished difference Result 135181 states and 172041 transitions. [2022-04-05 09:40:56,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 09:40:56,952 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 [2022-04-05 09:40:56,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:40:57,120 INFO L225 Difference]: With dead ends: 135181 [2022-04-05 09:40:57,120 INFO L226 Difference]: Without dead ends: 135179 [2022-04-05 09:40:57,149 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 [2022-04-05 09:40:57,150 INFO L913 BasicCegarLoop]: 84 mSDtfsCounter, 159 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 09:40:57,150 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 91 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 09:40:57,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135179 states. [2022-04-05 09:40:58,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135179 to 122889. [2022-04-05 09:40:58,969 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) [2022-04-05 09:40:59,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122889 states to 122889 states and 149511 transitions. [2022-04-05 09:40:59,154 INFO L78 Accepts]: Start accepts. Automaton has 122889 states and 149511 transitions. Word has length 36 [2022-04-05 09:40:59,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:40:59,155 INFO L478 AbstractCegarLoop]: Abstraction has 122889 states and 149511 transitions. [2022-04-05 09:40:59,155 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) [2022-04-05 09:40:59,155 INFO L276 IsEmpty]: Start isEmpty. Operand 122889 states and 149511 transitions. [2022-04-05 09:40:59,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-05 09:40:59,211 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:40:59,211 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] [2022-04-05 09:40:59,211 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-04-05 09:40:59,211 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:40:59,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:40:59,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1752638178, now seen corresponding path program 1 times [2022-04-05 09:40:59,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:40:59,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659388973] [2022-04-05 09:40:59,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:40:59,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:40:59,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:59,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 09:40:59,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:40:59,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 09:40:59,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:40:59,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659388973] [2022-04-05 09:40:59,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659388973] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 09:40:59,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 09:40:59,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 09:40:59,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991073470] [2022-04-05 09:40:59,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 09:40:59,239 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 09:40:59,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:40:59,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 09:40:59,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 09:40:59,240 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) [2022-04-05 09:41:01,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:41:01,010 INFO L93 Difference]: Finished difference Result 278541 states and 337929 transitions. [2022-04-05 09:41:01,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 09:41:01,011 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 [2022-04-05 09:41:01,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:41:01,382 INFO L225 Difference]: With dead ends: 278541 [2022-04-05 09:41:01,382 INFO L226 Difference]: Without dead ends: 157707 [2022-04-05 09:41:01,443 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 [2022-04-05 09:41:01,443 INFO L913 BasicCegarLoop]: 142 mSDtfsCounter, 142 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-04-05 09:41:01,443 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] [2022-04-05 09:41:01,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157707 states. [2022-04-05 09:41:03,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157707 to 157705. [2022-04-05 09:41:03,797 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) [2022-04-05 09:41:04,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157705 states to 157705 states and 188423 transitions. [2022-04-05 09:41:04,231 INFO L78 Accepts]: Start accepts. Automaton has 157705 states and 188423 transitions. Word has length 36 [2022-04-05 09:41:04,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:41:04,231 INFO L478 AbstractCegarLoop]: Abstraction has 157705 states and 188423 transitions. [2022-04-05 09:41:04,231 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) [2022-04-05 09:41:04,232 INFO L276 IsEmpty]: Start isEmpty. Operand 157705 states and 188423 transitions. [2022-04-05 09:41:04,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-05 09:41:04,309 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:41:04,309 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] [2022-04-05 09:41:04,309 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-04-05 09:41:04,309 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:41:04,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:41:04,310 INFO L85 PathProgramCache]: Analyzing trace with hash -505685520, now seen corresponding path program 1 times [2022-04-05 09:41:04,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:41:04,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199974568] [2022-04-05 09:41:04,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:41:04,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:41:04,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:41:04,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 09:41:04,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:41:04,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 09:41:04,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:41:04,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199974568] [2022-04-05 09:41:04,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199974568] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 09:41:04,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 09:41:04,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 09:41:04,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922253728] [2022-04-05 09:41:04,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 09:41:04,343 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 09:41:04,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:41:04,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 09:41:04,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 09:41:04,344 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) [2022-04-05 09:41:06,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:41:06,221 INFO L93 Difference]: Finished difference Result 236557 states and 281609 transitions. [2022-04-05 09:41:06,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 09:41:06,223 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 [2022-04-05 09:41:06,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:41:06,431 INFO L225 Difference]: With dead ends: 236557 [2022-04-05 09:41:06,431 INFO L226 Difference]: Without dead ends: 159755 [2022-04-05 09:41:06,506 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 [2022-04-05 09:41:06,506 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 [2022-04-05 09:41:06,506 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] [2022-04-05 09:41:06,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159755 states. [2022-04-05 09:41:08,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159755 to 159753. [2022-04-05 09:41:08,997 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) [2022-04-05 09:41:09,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159753 states to 159753 states and 188423 transitions. [2022-04-05 09:41:09,234 INFO L78 Accepts]: Start accepts. Automaton has 159753 states and 188423 transitions. Word has length 37 [2022-04-05 09:41:09,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:41:09,234 INFO L478 AbstractCegarLoop]: Abstraction has 159753 states and 188423 transitions. [2022-04-05 09:41:09,234 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) [2022-04-05 09:41:09,234 INFO L276 IsEmpty]: Start isEmpty. Operand 159753 states and 188423 transitions. [2022-04-05 09:41:09,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-05 09:41:09,555 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:41:09,555 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] [2022-04-05 09:41:09,556 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-04-05 09:41:09,556 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:41:09,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:41:09,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1502757873, now seen corresponding path program 1 times [2022-04-05 09:41:09,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:41:09,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926947217] [2022-04-05 09:41:09,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:41:09,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:41:09,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:41:09,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 09:41:09,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:41:09,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 09:41:09,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:41:09,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926947217] [2022-04-05 09:41:09,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926947217] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 09:41:09,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 09:41:09,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 09:41:09,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442899250] [2022-04-05 09:41:09,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 09:41:09,584 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 09:41:09,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:41:09,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 09:41:09,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 09:41:09,585 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) [2022-04-05 09:41:11,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:41:11,885 INFO L93 Difference]: Finished difference Result 262157 states and 311305 transitions. [2022-04-05 09:41:11,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 09:41:11,886 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 [2022-04-05 09:41:11,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:41:12,215 INFO L225 Difference]: With dead ends: 262157 [2022-04-05 09:41:12,216 INFO L226 Difference]: Without dead ends: 262155 [2022-04-05 09:41:12,391 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 [2022-04-05 09:41:12,391 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 [2022-04-05 09:41:12,391 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] [2022-04-05 09:41:12,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262155 states. [2022-04-05 09:41:15,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262155 to 245769. [2022-04-05 09:41:15,546 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) [2022-04-05 09:41:16,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245769 states to 245769 states and 282631 transitions. [2022-04-05 09:41:16,233 INFO L78 Accepts]: Start accepts. Automaton has 245769 states and 282631 transitions. Word has length 37 [2022-04-05 09:41:16,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:41:16,234 INFO L478 AbstractCegarLoop]: Abstraction has 245769 states and 282631 transitions. [2022-04-05 09:41:16,234 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) [2022-04-05 09:41:16,234 INFO L276 IsEmpty]: Start isEmpty. Operand 245769 states and 282631 transitions. [2022-04-05 09:41:16,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-05 09:41:16,385 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:41:16,385 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, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:41:16,385 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-04-05 09:41:16,385 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:41:16,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:41:16,385 INFO L85 PathProgramCache]: Analyzing trace with hash -149448176, now seen corresponding path program 1 times [2022-04-05 09:41:16,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:41:16,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837183511] [2022-04-05 09:41:16,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:41:16,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:41:16,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:41:16,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 09:41:16,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:41:16,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 09:41:16,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:41:16,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837183511] [2022-04-05 09:41:16,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837183511] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 09:41:16,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 09:41:16,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 09:41:16,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030605116] [2022-04-05 09:41:16,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 09:41:16,416 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 09:41:16,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:41:16,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 09:41:16,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 09:41:16,416 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) [2022-04-05 09:41:19,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:41:19,872 INFO L93 Difference]: Finished difference Result 552973 states and 630793 transitions. [2022-04-05 09:41:19,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 09:41:19,873 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 [2022-04-05 09:41:19,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:41:20,298 INFO L225 Difference]: With dead ends: 552973 [2022-04-05 09:41:20,298 INFO L226 Difference]: Without dead ends: 311307 [2022-04-05 09:41:20,817 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 [2022-04-05 09:41:20,818 INFO L913 BasicCegarLoop]: 144 mSDtfsCounter, 136 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 09:41:20,818 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 151 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 09:41:20,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311307 states. [2022-04-05 09:41:26,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311307 to 311305. [2022-04-05 09:41:26,264 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) [2022-04-05 09:41:27,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311305 states to 311305 states and 348167 transitions. [2022-04-05 09:41:27,107 INFO L78 Accepts]: Start accepts. Automaton has 311305 states and 348167 transitions. Word has length 37 [2022-04-05 09:41:27,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:41:27,108 INFO L478 AbstractCegarLoop]: Abstraction has 311305 states and 348167 transitions. [2022-04-05 09:41:27,108 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) [2022-04-05 09:41:27,108 INFO L276 IsEmpty]: Start isEmpty. Operand 311305 states and 348167 transitions. [2022-04-05 09:41:27,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-05 09:41:27,278 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:41:27,278 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] [2022-04-05 09:41:27,278 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-04-05 09:41:27,279 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:41:27,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:41:27,279 INFO L85 PathProgramCache]: Analyzing trace with hash 659179774, now seen corresponding path program 1 times [2022-04-05 09:41:27,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:41:27,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471489507] [2022-04-05 09:41:27,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:41:27,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:41:27,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:41:27,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 09:41:27,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:41:27,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 09:41:27,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:41:27,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471489507] [2022-04-05 09:41:27,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471489507] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 09:41:27,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 09:41:27,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 09:41:27,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565523342] [2022-04-05 09:41:27,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 09:41:27,305 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 09:41:27,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:41:27,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 09:41:27,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 09:41:27,305 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) [2022-04-05 09:41:30,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:41:30,485 INFO L93 Difference]: Finished difference Result 466957 states and 520201 transitions. [2022-04-05 09:41:30,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 09:41:30,486 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 [2022-04-05 09:41:30,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:41:30,918 INFO L225 Difference]: With dead ends: 466957 [2022-04-05 09:41:30,919 INFO L226 Difference]: Without dead ends: 315403 [2022-04-05 09:41:31,042 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 [2022-04-05 09:41:31,043 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 [2022-04-05 09:41:31,043 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] [2022-04-05 09:41:31,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315403 states. [2022-04-05 09:41:35,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315403 to 315401. [2022-04-05 09:41:35,773 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) [2022-04-05 09:41:36,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315401 states to 315401 states and 348167 transitions. [2022-04-05 09:41:36,634 INFO L78 Accepts]: Start accepts. Automaton has 315401 states and 348167 transitions. Word has length 38 [2022-04-05 09:41:36,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:41:36,634 INFO L478 AbstractCegarLoop]: Abstraction has 315401 states and 348167 transitions. [2022-04-05 09:41:36,634 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) [2022-04-05 09:41:36,634 INFO L276 IsEmpty]: Start isEmpty. Operand 315401 states and 348167 transitions. [2022-04-05 09:41:37,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-05 09:41:37,135 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:41:37,135 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] [2022-04-05 09:41:37,135 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-04-05 09:41:37,135 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:41:37,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:41:37,136 INFO L85 PathProgramCache]: Analyzing trace with hash -337892579, now seen corresponding path program 1 times [2022-04-05 09:41:37,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:41:37,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694023217] [2022-04-05 09:41:37,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:41:37,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:41:37,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:41:37,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 09:41:37,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:41:37,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 09:41:37,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:41:37,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694023217] [2022-04-05 09:41:37,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694023217] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 09:41:37,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 09:41:37,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 09:41:37,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043575103] [2022-04-05 09:41:37,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 09:41:37,158 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 09:41:37,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:41:37,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 09:41:37,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 09:41:37,159 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) [2022-04-05 09:41:41,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:41:41,771 INFO L93 Difference]: Finished difference Result 507915 states and 557064 transitions. [2022-04-05 09:41:41,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 09:41:41,771 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 [2022-04-05 09:41:41,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:41:42,793 INFO L225 Difference]: With dead ends: 507915 [2022-04-05 09:41:42,793 INFO L226 Difference]: Without dead ends: 507913 [2022-04-05 09:41:42,877 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 [2022-04-05 09:41:42,878 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 [2022-04-05 09:41:42,878 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] [2022-04-05 09:41:43,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507913 states. [2022-04-05 09:41:49,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507913 to 491529. [2022-04-05 09:41:49,956 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) [2022-04-05 09:41:51,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491529 states to 491529 states and 532487 transitions. [2022-04-05 09:41:51,973 INFO L78 Accepts]: Start accepts. Automaton has 491529 states and 532487 transitions. Word has length 38 [2022-04-05 09:41:51,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:41:51,973 INFO L478 AbstractCegarLoop]: Abstraction has 491529 states and 532487 transitions. [2022-04-05 09:41:51,973 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) [2022-04-05 09:41:51,973 INFO L276 IsEmpty]: Start isEmpty. Operand 491529 states and 532487 transitions. [2022-04-05 09:41:52,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-05 09:41:52,957 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:41:52,957 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] [2022-04-05 09:41:52,957 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-04-05 09:41:52,958 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:41:52,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:41:52,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1015417118, now seen corresponding path program 1 times [2022-04-05 09:41:52,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:41:52,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349700264] [2022-04-05 09:41:52,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:41:52,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:41:53,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:41:53,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 09:41:53,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:41:53,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 09:41:53,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:41:53,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349700264] [2022-04-05 09:41:53,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349700264] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 09:41:53,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 09:41:53,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 09:41:53,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098973868] [2022-04-05 09:41:53,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 09:41:53,039 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 09:41:53,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:41:53,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 09:41:53,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 09:41:53,041 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) [2022-04-05 09:42:00,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:42:00,076 INFO L93 Difference]: Finished difference Result 1097737 states and 1171463 transitions. [2022-04-05 09:42:00,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 09:42:00,077 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 [2022-04-05 09:42:00,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:42:00,077 INFO L225 Difference]: With dead ends: 1097737 [2022-04-05 09:42:00,077 INFO L226 Difference]: Without dead ends: 0 [2022-04-05 09:42:00,826 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 [2022-04-05 09:42:00,827 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 [2022-04-05 09:42:00,827 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] [2022-04-05 09:42:00,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-05 09:42:00,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-05 09:42:00,828 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) [2022-04-05 09:42:00,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-05 09:42:00,828 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 38 [2022-04-05 09:42:00,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:42:00,828 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-05 09:42:00,828 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) [2022-04-05 09:42:00,828 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-05 09:42:00,829 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-05 09:42:00,831 INFO L788 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-05 09:42:00,832 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-04-05 09:42:00,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.