/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/locks/test_locks_14-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 23:42:51,097 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 23:42:51,098 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 23:42:51,146 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 23:42:51,152 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 23:42:51,153 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 23:42:51,153 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 23:42:51,154 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 23:42:51,155 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 23:42:51,155 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 23:42:51,156 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 23:42:51,157 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 23:42:51,158 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 23:42:51,159 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 23:42:51,159 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 23:42:51,160 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 23:42:51,161 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 23:42:51,166 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 23:42:51,166 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 23:42:51,167 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 23:42:51,167 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-01-31 23:42:51,173 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 23:42:51,173 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 23:42:51,174 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 23:42:51,174 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 23:42:51,174 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 23:42:51,174 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 23:42:51,174 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 23:42:51,175 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 23:42:51,175 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 23:42:51,175 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 23:42:51,175 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 23:42:51,175 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 23:42:51,175 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 23:42:51,175 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 23:42:51,175 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 23:42:51,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 23:42:51,176 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 23:42:51,176 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 23:42:51,176 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 23:42:51,176 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-01-31 23:42:51,176 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 23:42:51,336 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 23:42:51,354 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 23:42:51,356 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 23:42:51,357 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 23:42:51,357 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 23:42:51,358 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_14-1.c [2022-01-31 23:42:51,407 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9118f9db/57d9cbedffb04f8cbd4ab843dcb5a38a/FLAG5653c0192 [2022-01-31 23:42:51,747 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 23:42:51,747 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_14-1.c [2022-01-31 23:42:51,752 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9118f9db/57d9cbedffb04f8cbd4ab843dcb5a38a/FLAG5653c0192 [2022-01-31 23:42:51,771 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9118f9db/57d9cbedffb04f8cbd4ab843dcb5a38a [2022-01-31 23:42:51,772 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 23:42:51,773 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 23:42:51,774 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 23:42:51,774 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 23:42:51,782 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 23:42:51,782 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 11:42:51" (1/1) ... [2022-01-31 23:42:51,783 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37dd4faf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:42:51, skipping insertion in model container [2022-01-31 23:42:51,783 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 11:42:51" (1/1) ... [2022-01-31 23:42:51,787 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 23:42:51,801 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 23:42:51,942 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] [2022-01-31 23:42:51,944 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 23:42:51,949 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 23:42:51,971 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] [2022-01-31 23:42:51,972 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 23:42:51,979 INFO L208 MainTranslator]: Completed translation [2022-01-31 23:42:51,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:42:51 WrapperNode [2022-01-31 23:42:51,979 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 23:42:51,980 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 23:42:51,980 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 23:42:51,980 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 23:42:51,986 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:42:51" (1/1) ... [2022-01-31 23:42:51,987 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:42:51" (1/1) ... [2022-01-31 23:42:51,999 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:42:51" (1/1) ... [2022-01-31 23:42:51,999 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:42:51" (1/1) ... [2022-01-31 23:42:52,004 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:42:51" (1/1) ... [2022-01-31 23:42:52,008 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:42:51" (1/1) ... [2022-01-31 23:42:52,009 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:42:51" (1/1) ... [2022-01-31 23:42:52,011 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 23:42:52,012 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 23:42:52,012 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 23:42:52,012 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 23:42:52,013 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:42:51" (1/1) ... [2022-01-31 23:42:52,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 23:42:52,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 23:42:52,036 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 23:42:52,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 23:42:52,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 23:42:52,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 23:42:52,060 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 23:42:52,060 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 23:42:52,060 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 23:42:52,060 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 23:42:52,060 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 23:42:52,060 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 23:42:52,060 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 23:42:52,060 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 23:42:52,061 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 23:42:52,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 23:42:52,061 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 23:42:52,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 23:42:52,061 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 23:42:52,061 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 23:42:52,108 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 23:42:52,109 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 23:42:52,276 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 23:42:52,281 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 23:42:52,281 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-31 23:42:52,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:42:52 BoogieIcfgContainer [2022-01-31 23:42:52,282 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 23:42:52,283 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 23:42:52,283 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 23:42:52,286 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 23:42:52,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 11:42:51" (1/3) ... [2022-01-31 23:42:52,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59fba663 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 11:42:52, skipping insertion in model container [2022-01-31 23:42:52,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:42:51" (2/3) ... [2022-01-31 23:42:52,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59fba663 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 11:42:52, skipping insertion in model container [2022-01-31 23:42:52,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:42:52" (3/3) ... [2022-01-31 23:42:52,288 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_14-1.c [2022-01-31 23:42:52,291 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 23:42:52,291 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 23:42:52,335 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 23:42:52,339 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=QVASR [2022-01-31 23:42:52,339 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 23:42:52,358 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) [2022-01-31 23:42:52,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 23:42:52,364 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:52,364 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:42:52,365 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:52,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:52,371 INFO L85 PathProgramCache]: Analyzing trace with hash -406532905, now seen corresponding path program 1 times [2022-01-31 23:42:52,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:52,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [416163114] [2022-01-31 23:42:52,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:52,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:52,420 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:52,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:52,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:52,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:52,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:42:52,589 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:52,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [416163114] [2022-01-31 23:42:52,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [416163114] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:52,591 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:52,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:42:52,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863396361] [2022-01-31 23:42:52,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:52,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:42:52,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:52,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:42:52,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:42:52,618 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) [2022-01-31 23:42:52,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:52,808 INFO L93 Difference]: Finished difference Result 112 states and 199 transitions. [2022-01-31 23:42:52,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:42:52,810 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 [2022-01-31 23:42:52,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:52,818 INFO L225 Difference]: With dead ends: 112 [2022-01-31 23:42:52,818 INFO L226 Difference]: Without dead ends: 97 [2022-01-31 23:42:52,820 INFO L932 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 [2022-01-31 23:42:52,825 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 242 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:52,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 113 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:42:52,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-01-31 23:42:52,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 67. [2022-01-31 23:42:52,852 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) [2022-01-31 23:42:52,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 122 transitions. [2022-01-31 23:42:52,854 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 122 transitions. Word has length 25 [2022-01-31 23:42:52,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:52,855 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 122 transitions. [2022-01-31 23:42:52,855 INFO L471 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) [2022-01-31 23:42:52,855 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 122 transitions. [2022-01-31 23:42:52,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 23:42:52,855 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:52,856 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:42:52,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 23:42:52,856 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:52,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:52,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1994880807, now seen corresponding path program 1 times [2022-01-31 23:42:52,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:52,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [935843674] [2022-01-31 23:42:52,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:52,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:52,859 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:52,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:52,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:52,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:52,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:42:52,902 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:52,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [935843674] [2022-01-31 23:42:52,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [935843674] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:52,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:52,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:42:52,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153290521] [2022-01-31 23:42:52,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:52,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:42:52,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:52,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:42:52,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:42:52,904 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) [2022-01-31 23:42:53,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:53,027 INFO L93 Difference]: Finished difference Result 158 states and 293 transitions. [2022-01-31 23:42:53,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:42:53,027 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 [2022-01-31 23:42:53,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:53,031 INFO L225 Difference]: With dead ends: 158 [2022-01-31 23:42:53,031 INFO L226 Difference]: Without dead ends: 97 [2022-01-31 23:42:53,032 INFO L932 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 [2022-01-31 23:42:53,033 INFO L933 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 [2022-01-31 23:42:53,033 INFO L934 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] [2022-01-31 23:42:53,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-01-31 23:42:53,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2022-01-31 23:42:53,050 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) [2022-01-31 23:42:53,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 174 transitions. [2022-01-31 23:42:53,051 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 174 transitions. Word has length 25 [2022-01-31 23:42:53,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:53,052 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 174 transitions. [2022-01-31 23:42:53,052 INFO L471 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) [2022-01-31 23:42:53,052 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 174 transitions. [2022-01-31 23:42:53,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 23:42:53,052 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:53,052 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:42:53,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 23:42:53,053 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:53,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:53,053 INFO L85 PathProgramCache]: Analyzing trace with hash 282593920, now seen corresponding path program 1 times [2022-01-31 23:42:53,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:53,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1961264018] [2022-01-31 23:42:53,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:53,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:53,055 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:53,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:53,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:53,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:53,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:42:53,125 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:53,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1961264018] [2022-01-31 23:42:53,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1961264018] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:53,125 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:53,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:42:53,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577929842] [2022-01-31 23:42:53,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:53,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:42:53,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:53,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:42:53,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:42:53,126 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) [2022-01-31 23:42:53,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:53,218 INFO L93 Difference]: Finished difference Result 145 states and 262 transitions. [2022-01-31 23:42:53,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:42:53,218 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 [2022-01-31 23:42:53,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:53,219 INFO L225 Difference]: With dead ends: 145 [2022-01-31 23:42:53,219 INFO L226 Difference]: Without dead ends: 100 [2022-01-31 23:42:53,220 INFO L932 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 [2022-01-31 23:42:53,220 INFO L933 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 [2022-01-31 23:42:53,221 INFO L934 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] [2022-01-31 23:42:53,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-01-31 23:42:53,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2022-01-31 23:42:53,229 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) [2022-01-31 23:42:53,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 176 transitions. [2022-01-31 23:42:53,230 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 176 transitions. Word has length 26 [2022-01-31 23:42:53,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:53,230 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 176 transitions. [2022-01-31 23:42:53,230 INFO L471 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) [2022-01-31 23:42:53,231 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 176 transitions. [2022-01-31 23:42:53,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 23:42:53,231 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:53,231 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:42:53,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 23:42:53,231 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:53,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:53,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1711550786, now seen corresponding path program 1 times [2022-01-31 23:42:53,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:53,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [737259242] [2022-01-31 23:42:53,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:53,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:53,234 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:53,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:53,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:53,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:53,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:42:53,266 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:53,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [737259242] [2022-01-31 23:42:53,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [737259242] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:53,267 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:53,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:42:53,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823106843] [2022-01-31 23:42:53,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:53,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:42:53,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:53,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:42:53,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:42:53,268 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) [2022-01-31 23:42:53,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:53,391 INFO L93 Difference]: Finished difference Result 274 states and 504 transitions. [2022-01-31 23:42:53,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:42:53,391 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 [2022-01-31 23:42:53,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:53,393 INFO L225 Difference]: With dead ends: 274 [2022-01-31 23:42:53,394 INFO L226 Difference]: Without dead ends: 185 [2022-01-31 23:42:53,394 INFO L932 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 [2022-01-31 23:42:53,401 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 231 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 103 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 [2022-01-31 23:42:53,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 103 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:42:53,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-01-31 23:42:53,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 183. [2022-01-31 23:42:53,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 179 states have (on average 1.8435754189944134) internal successors, (330), 179 states have internal predecessors, (330), 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) [2022-01-31 23:42:53,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 333 transitions. [2022-01-31 23:42:53,431 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 333 transitions. Word has length 26 [2022-01-31 23:42:53,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:53,431 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 333 transitions. [2022-01-31 23:42:53,431 INFO L471 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) [2022-01-31 23:42:53,431 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 333 transitions. [2022-01-31 23:42:53,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 23:42:53,436 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:53,436 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:42:53,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 23:42:53,436 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:53,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:53,436 INFO L85 PathProgramCache]: Analyzing trace with hash -123202884, now seen corresponding path program 1 times [2022-01-31 23:42:53,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:53,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [280019803] [2022-01-31 23:42:53,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:53,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:53,440 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:53,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:53,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:53,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:53,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:42:53,516 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:53,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [280019803] [2022-01-31 23:42:53,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [280019803] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:53,516 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:53,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:42:53,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239918518] [2022-01-31 23:42:53,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:53,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:42:53,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:53,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:42:53,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:42:53,518 INFO L87 Difference]: Start difference. First operand 183 states and 333 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) [2022-01-31 23:42:53,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:53,604 INFO L93 Difference]: Finished difference Result 239 states and 435 transitions. [2022-01-31 23:42:53,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:42:53,605 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 [2022-01-31 23:42:53,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:53,606 INFO L225 Difference]: With dead ends: 239 [2022-01-31 23:42:53,606 INFO L226 Difference]: Without dead ends: 237 [2022-01-31 23:42:53,607 INFO L932 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 [2022-01-31 23:42:53,610 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 150 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 176 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 [2022-01-31 23:42:53,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 176 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:42:53,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-01-31 23:42:53,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 183. [2022-01-31 23:42:53,629 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) [2022-01-31 23:42:53,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 331 transitions. [2022-01-31 23:42:53,630 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 331 transitions. Word has length 26 [2022-01-31 23:42:53,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:53,631 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 331 transitions. [2022-01-31 23:42:53,631 INFO L471 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) [2022-01-31 23:42:53,632 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 331 transitions. [2022-01-31 23:42:53,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 23:42:53,635 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:53,638 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:42:53,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 23:42:53,639 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:53,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:53,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1518254386, now seen corresponding path program 1 times [2022-01-31 23:42:53,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:53,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2088348851] [2022-01-31 23:42:53,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:53,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:53,641 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:53,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:53,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:53,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:53,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:42:53,684 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:53,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2088348851] [2022-01-31 23:42:53,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2088348851] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:53,685 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:53,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:42:53,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886098156] [2022-01-31 23:42:53,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:53,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:42:53,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:53,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:42:53,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:42:53,686 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) [2022-01-31 23:42:53,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:53,772 INFO L93 Difference]: Finished difference Result 347 states and 635 transitions. [2022-01-31 23:42:53,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:42:53,772 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 [2022-01-31 23:42:53,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:53,775 INFO L225 Difference]: With dead ends: 347 [2022-01-31 23:42:53,775 INFO L226 Difference]: Without dead ends: 345 [2022-01-31 23:42:53,775 INFO L932 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 [2022-01-31 23:42:53,776 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 222 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-01-31 23:42:53,776 INFO L934 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] [2022-01-31 23:42:53,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-01-31 23:42:53,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 247. [2022-01-31 23:42:53,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 243 states have (on average 1.8189300411522633) internal successors, (442), 243 states have internal predecessors, (442), 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) [2022-01-31 23:42:53,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 445 transitions. [2022-01-31 23:42:53,792 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 445 transitions. Word has length 27 [2022-01-31 23:42:53,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:53,792 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 445 transitions. [2022-01-31 23:42:53,792 INFO L471 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) [2022-01-31 23:42:53,792 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 445 transitions. [2022-01-31 23:42:53,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 23:42:53,794 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:53,794 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:42:53,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 23:42:53,795 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:53,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:53,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1188365008, now seen corresponding path program 1 times [2022-01-31 23:42:53,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:53,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1265858555] [2022-01-31 23:42:53,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:53,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:53,796 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:53,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:53,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:53,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:53,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:42:53,844 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:53,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1265858555] [2022-01-31 23:42:53,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1265858555] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:53,844 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:53,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:42:53,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984978511] [2022-01-31 23:42:53,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:53,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:42:53,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:53,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:42:53,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:42:53,845 INFO L87 Difference]: Start difference. First operand 247 states and 445 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) [2022-01-31 23:42:53,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:53,944 INFO L93 Difference]: Finished difference Result 591 states and 1075 transitions. [2022-01-31 23:42:53,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:42:53,945 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 [2022-01-31 23:42:53,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:53,946 INFO L225 Difference]: With dead ends: 591 [2022-01-31 23:42:53,946 INFO L226 Difference]: Without dead ends: 353 [2022-01-31 23:42:53,949 INFO L932 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 [2022-01-31 23:42:53,949 INFO L933 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 [2022-01-31 23:42:53,950 INFO L934 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] [2022-01-31 23:42:53,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-01-31 23:42:53,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 351. [2022-01-31 23:42:53,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 347 states have (on average 1.8097982708933718) internal successors, (628), 347 states have internal predecessors, (628), 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) [2022-01-31 23:42:53,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 631 transitions. [2022-01-31 23:42:53,970 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 631 transitions. Word has length 27 [2022-01-31 23:42:53,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:53,970 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 631 transitions. [2022-01-31 23:42:53,970 INFO L471 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) [2022-01-31 23:42:53,970 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 631 transitions. [2022-01-31 23:42:53,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 23:42:53,971 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:53,971 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:42:53,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 23:42:53,971 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:53,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:53,972 INFO L85 PathProgramCache]: Analyzing trace with hash 178967059, now seen corresponding path program 1 times [2022-01-31 23:42:53,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:53,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [42068154] [2022-01-31 23:42:53,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:53,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:53,989 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:54,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:54,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:54,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:54,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:42:54,032 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:54,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [42068154] [2022-01-31 23:42:54,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [42068154] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:54,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:54,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:42:54,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470489880] [2022-01-31 23:42:54,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:54,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:42:54,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:54,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:42:54,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:42:54,034 INFO L87 Difference]: Start difference. First operand 351 states and 631 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) [2022-01-31 23:42:54,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:54,122 INFO L93 Difference]: Finished difference Result 529 states and 949 transitions. [2022-01-31 23:42:54,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:42:54,123 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 [2022-01-31 23:42:54,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:54,124 INFO L225 Difference]: With dead ends: 529 [2022-01-31 23:42:54,124 INFO L226 Difference]: Without dead ends: 359 [2022-01-31 23:42:54,124 INFO L932 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 [2022-01-31 23:42:54,125 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 181 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-01-31 23:42:54,125 INFO L934 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] [2022-01-31 23:42:54,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-01-31 23:42:54,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 357. [2022-01-31 23:42:54,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 353 states have (on average 1.7903682719546743) internal successors, (632), 353 states have internal predecessors, (632), 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) [2022-01-31 23:42:54,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 635 transitions. [2022-01-31 23:42:54,143 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 635 transitions. Word has length 28 [2022-01-31 23:42:54,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:54,143 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 635 transitions. [2022-01-31 23:42:54,143 INFO L471 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) [2022-01-31 23:42:54,144 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 635 transitions. [2022-01-31 23:42:54,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 23:42:54,144 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:54,144 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:42:54,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 23:42:54,144 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:54,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:54,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1815177647, now seen corresponding path program 1 times [2022-01-31 23:42:54,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:54,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1759243355] [2022-01-31 23:42:54,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:54,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:54,146 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:54,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:54,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:54,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:54,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:42:54,164 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:54,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1759243355] [2022-01-31 23:42:54,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1759243355] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:54,165 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:54,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:42:54,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16057130] [2022-01-31 23:42:54,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:54,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:42:54,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:54,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:42:54,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:42:54,166 INFO L87 Difference]: Start difference. First operand 357 states and 635 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) [2022-01-31 23:42:54,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:54,261 INFO L93 Difference]: Finished difference Result 669 states and 1205 transitions. [2022-01-31 23:42:54,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:42:54,261 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 [2022-01-31 23:42:54,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:54,263 INFO L225 Difference]: With dead ends: 669 [2022-01-31 23:42:54,264 INFO L226 Difference]: Without dead ends: 667 [2022-01-31 23:42:54,264 INFO L932 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 [2022-01-31 23:42:54,265 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 215 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-01-31 23:42:54,265 INFO L934 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] [2022-01-31 23:42:54,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-01-31 23:42:54,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 489. [2022-01-31 23:42:54,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 485 states have (on average 1.7649484536082474) internal successors, (856), 485 states have internal predecessors, (856), 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) [2022-01-31 23:42:54,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 859 transitions. [2022-01-31 23:42:54,290 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 859 transitions. Word has length 28 [2022-01-31 23:42:54,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:54,290 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 859 transitions. [2022-01-31 23:42:54,290 INFO L471 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) [2022-01-31 23:42:54,290 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 859 transitions. [2022-01-31 23:42:54,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 23:42:54,291 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:54,291 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:42:54,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 23:42:54,291 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:54,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:54,291 INFO L85 PathProgramCache]: Analyzing trace with hash 891441747, now seen corresponding path program 1 times [2022-01-31 23:42:54,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:54,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1625132099] [2022-01-31 23:42:54,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:54,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:54,292 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:54,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:54,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:54,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:54,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:42:54,312 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:54,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1625132099] [2022-01-31 23:42:54,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1625132099] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:54,312 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:54,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:42:54,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560830681] [2022-01-31 23:42:54,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:54,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:42:54,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:54,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:42:54,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:42:54,313 INFO L87 Difference]: Start difference. First operand 489 states and 859 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) [2022-01-31 23:42:54,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:54,418 INFO L93 Difference]: Finished difference Result 1165 states and 2061 transitions. [2022-01-31 23:42:54,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:42:54,419 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 [2022-01-31 23:42:54,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:54,422 INFO L225 Difference]: With dead ends: 1165 [2022-01-31 23:42:54,422 INFO L226 Difference]: Without dead ends: 691 [2022-01-31 23:42:54,422 INFO L932 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 [2022-01-31 23:42:54,423 INFO L933 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 [2022-01-31 23:42:54,423 INFO L934 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] [2022-01-31 23:42:54,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2022-01-31 23:42:54,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 689. [2022-01-31 23:42:54,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 685 states have (on average 1.7576642335766424) internal successors, (1204), 685 states have internal predecessors, (1204), 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) [2022-01-31 23:42:54,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 1207 transitions. [2022-01-31 23:42:54,457 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 1207 transitions. Word has length 28 [2022-01-31 23:42:54,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:54,457 INFO L470 AbstractCegarLoop]: Abstraction has 689 states and 1207 transitions. [2022-01-31 23:42:54,458 INFO L471 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) [2022-01-31 23:42:54,458 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 1207 transitions. [2022-01-31 23:42:54,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 23:42:54,458 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:54,458 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:42:54,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 23:42:54,459 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:54,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:54,459 INFO L85 PathProgramCache]: Analyzing trace with hash -435719099, now seen corresponding path program 1 times [2022-01-31 23:42:54,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:54,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381179988] [2022-01-31 23:42:54,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:54,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:54,461 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:54,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:54,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:54,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:54,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:42:54,490 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:54,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381179988] [2022-01-31 23:42:54,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [381179988] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:54,491 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:54,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:42:54,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277910358] [2022-01-31 23:42:54,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:54,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:42:54,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:54,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:42:54,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:42:54,492 INFO L87 Difference]: Start difference. First operand 689 states and 1207 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) [2022-01-31 23:42:54,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:54,591 INFO L93 Difference]: Finished difference Result 1033 states and 1805 transitions. [2022-01-31 23:42:54,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:42:54,592 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 [2022-01-31 23:42:54,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:54,594 INFO L225 Difference]: With dead ends: 1033 [2022-01-31 23:42:54,594 INFO L226 Difference]: Without dead ends: 699 [2022-01-31 23:42:54,595 INFO L932 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 [2022-01-31 23:42:54,595 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 180 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-01-31 23:42:54,595 INFO L934 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] [2022-01-31 23:42:54,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2022-01-31 23:42:54,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 697. [2022-01-31 23:42:54,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 693 states have (on average 1.7373737373737375) internal successors, (1204), 693 states have internal predecessors, (1204), 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) [2022-01-31 23:42:54,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1207 transitions. [2022-01-31 23:42:54,650 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1207 transitions. Word has length 29 [2022-01-31 23:42:54,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:54,650 INFO L470 AbstractCegarLoop]: Abstraction has 697 states and 1207 transitions. [2022-01-31 23:42:54,650 INFO L471 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) [2022-01-31 23:42:54,650 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1207 transitions. [2022-01-31 23:42:54,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 23:42:54,651 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:54,651 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:42:54,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 23:42:54,651 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:54,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:54,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1865103491, now seen corresponding path program 1 times [2022-01-31 23:42:54,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:54,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [412136732] [2022-01-31 23:42:54,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:54,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:54,660 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:54,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:54,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:54,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:54,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:42:54,680 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:54,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [412136732] [2022-01-31 23:42:54,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [412136732] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:54,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:54,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:42:54,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969014192] [2022-01-31 23:42:54,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:54,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:42:54,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:54,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:42:54,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:42:54,681 INFO L87 Difference]: Start difference. First operand 697 states and 1207 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) [2022-01-31 23:42:54,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:54,799 INFO L93 Difference]: Finished difference Result 1293 states and 2273 transitions. [2022-01-31 23:42:54,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:42:54,799 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 [2022-01-31 23:42:54,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:54,803 INFO L225 Difference]: With dead ends: 1293 [2022-01-31 23:42:54,803 INFO L226 Difference]: Without dead ends: 1291 [2022-01-31 23:42:54,804 INFO L932 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 [2022-01-31 23:42:54,804 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 208 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-01-31 23:42:54,804 INFO L934 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] [2022-01-31 23:42:54,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1291 states. [2022-01-31 23:42:54,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1291 to 969. [2022-01-31 23:42:54,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 965 states have (on average 1.7036269430051814) internal successors, (1644), 965 states have internal predecessors, (1644), 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) [2022-01-31 23:42:54,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 1647 transitions. [2022-01-31 23:42:54,876 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 1647 transitions. Word has length 29 [2022-01-31 23:42:54,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:54,876 INFO L470 AbstractCegarLoop]: Abstraction has 969 states and 1647 transitions. [2022-01-31 23:42:54,877 INFO L471 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) [2022-01-31 23:42:54,877 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 1647 transitions. [2022-01-31 23:42:54,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 23:42:54,878 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:54,878 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:42:54,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 23:42:54,878 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:54,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:54,878 INFO L85 PathProgramCache]: Analyzing trace with hash 276755589, now seen corresponding path program 1 times [2022-01-31 23:42:54,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:54,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1742159327] [2022-01-31 23:42:54,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:54,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:54,880 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:54,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:54,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:54,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:54,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:42:54,899 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:54,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1742159327] [2022-01-31 23:42:54,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1742159327] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:54,899 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:54,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:42:54,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214646346] [2022-01-31 23:42:54,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:54,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:42:54,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:54,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:42:54,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:42:54,900 INFO L87 Difference]: Start difference. First operand 969 states and 1647 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) [2022-01-31 23:42:55,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:55,047 INFO L93 Difference]: Finished difference Result 2301 states and 3937 transitions. [2022-01-31 23:42:55,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:42:55,047 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 [2022-01-31 23:42:55,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:55,051 INFO L225 Difference]: With dead ends: 2301 [2022-01-31 23:42:55,051 INFO L226 Difference]: Without dead ends: 1355 [2022-01-31 23:42:55,053 INFO L932 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 [2022-01-31 23:42:55,053 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 184 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-01-31 23:42:55,053 INFO L934 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] [2022-01-31 23:42:55,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2022-01-31 23:42:55,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 1353. [2022-01-31 23:42:55,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1353 states, 1349 states have (on average 1.6990363232023722) internal successors, (2292), 1349 states have internal predecessors, (2292), 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) [2022-01-31 23:42:55,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1353 states to 1353 states and 2295 transitions. [2022-01-31 23:42:55,139 INFO L78 Accepts]: Start accepts. Automaton has 1353 states and 2295 transitions. Word has length 29 [2022-01-31 23:42:55,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:55,140 INFO L470 AbstractCegarLoop]: Abstraction has 1353 states and 2295 transitions. [2022-01-31 23:42:55,140 INFO L471 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) [2022-01-31 23:42:55,140 INFO L276 IsEmpty]: Start isEmpty. Operand 1353 states and 2295 transitions. [2022-01-31 23:42:55,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 23:42:55,141 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:55,141 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:42:55,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 23:42:55,141 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:55,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:55,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1983846824, now seen corresponding path program 1 times [2022-01-31 23:42:55,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:55,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821556456] [2022-01-31 23:42:55,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:55,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:55,142 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:55,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:55,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:55,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:55,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:42:55,160 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:55,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821556456] [2022-01-31 23:42:55,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [821556456] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:55,160 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:55,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:42:55,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035297684] [2022-01-31 23:42:55,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:55,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:42:55,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:55,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:42:55,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:42:55,161 INFO L87 Difference]: Start difference. First operand 1353 states and 2295 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) [2022-01-31 23:42:55,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:55,303 INFO L93 Difference]: Finished difference Result 2029 states and 3433 transitions. [2022-01-31 23:42:55,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:42:55,303 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 [2022-01-31 23:42:55,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:55,307 INFO L225 Difference]: With dead ends: 2029 [2022-01-31 23:42:55,307 INFO L226 Difference]: Without dead ends: 1371 [2022-01-31 23:42:55,308 INFO L932 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 [2022-01-31 23:42:55,308 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 179 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-01-31 23:42:55,309 INFO L934 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] [2022-01-31 23:42:55,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2022-01-31 23:42:55,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1369. [2022-01-31 23:42:55,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 1365 states have (on average 1.6791208791208792) internal successors, (2292), 1365 states have internal predecessors, (2292), 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) [2022-01-31 23:42:55,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 2295 transitions. [2022-01-31 23:42:55,397 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 2295 transitions. Word has length 30 [2022-01-31 23:42:55,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:55,398 INFO L470 AbstractCegarLoop]: Abstraction has 1369 states and 2295 transitions. [2022-01-31 23:42:55,398 INFO L471 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) [2022-01-31 23:42:55,398 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 2295 transitions. [2022-01-31 23:42:55,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 23:42:55,399 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:55,399 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:42:55,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 23:42:55,399 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:55,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:55,399 INFO L85 PathProgramCache]: Analyzing trace with hash -10297882, now seen corresponding path program 1 times [2022-01-31 23:42:55,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:55,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1373902031] [2022-01-31 23:42:55,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:55,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:55,400 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:55,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:55,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:55,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:55,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:42:55,418 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:55,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1373902031] [2022-01-31 23:42:55,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1373902031] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:55,418 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:55,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:42:55,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766561268] [2022-01-31 23:42:55,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:55,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:42:55,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:55,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:42:55,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:42:55,419 INFO L87 Difference]: Start difference. First operand 1369 states and 2295 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) [2022-01-31 23:42:55,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:55,619 INFO L93 Difference]: Finished difference Result 2509 states and 4281 transitions. [2022-01-31 23:42:55,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:42:55,620 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 [2022-01-31 23:42:55,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:55,626 INFO L225 Difference]: With dead ends: 2509 [2022-01-31 23:42:55,626 INFO L226 Difference]: Without dead ends: 2507 [2022-01-31 23:42:55,627 INFO L932 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 [2022-01-31 23:42:55,627 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 201 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-01-31 23:42:55,627 INFO L934 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] [2022-01-31 23:42:55,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2507 states. [2022-01-31 23:42:55,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2507 to 1929. [2022-01-31 23:42:55,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1929 states, 1925 states have (on average 1.6394805194805195) internal successors, (3156), 1925 states have internal predecessors, (3156), 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) [2022-01-31 23:42:55,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1929 states to 1929 states and 3159 transitions. [2022-01-31 23:42:55,754 INFO L78 Accepts]: Start accepts. Automaton has 1929 states and 3159 transitions. Word has length 30 [2022-01-31 23:42:55,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:55,755 INFO L470 AbstractCegarLoop]: Abstraction has 1929 states and 3159 transitions. [2022-01-31 23:42:55,755 INFO L471 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) [2022-01-31 23:42:55,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1929 states and 3159 transitions. [2022-01-31 23:42:55,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 23:42:55,757 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:55,757 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:42:55,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 23:42:55,757 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:55,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:55,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1598645784, now seen corresponding path program 1 times [2022-01-31 23:42:55,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:55,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1006480015] [2022-01-31 23:42:55,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:55,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:55,758 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:55,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:55,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:55,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:55,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:42:55,779 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:55,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1006480015] [2022-01-31 23:42:55,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1006480015] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:55,779 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:55,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:42:55,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600456151] [2022-01-31 23:42:55,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:55,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:42:55,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:55,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:42:55,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:42:55,780 INFO L87 Difference]: Start difference. First operand 1929 states and 3159 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) [2022-01-31 23:42:56,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:56,028 INFO L93 Difference]: Finished difference Result 4557 states and 7513 transitions. [2022-01-31 23:42:56,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:42:56,029 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 [2022-01-31 23:42:56,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:56,035 INFO L225 Difference]: With dead ends: 4557 [2022-01-31 23:42:56,035 INFO L226 Difference]: Without dead ends: 2667 [2022-01-31 23:42:56,038 INFO L932 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 [2022-01-31 23:42:56,038 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 178 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-01-31 23:42:56,039 INFO L934 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] [2022-01-31 23:42:56,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2667 states. [2022-01-31 23:42:56,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2667 to 2665. [2022-01-31 23:42:56,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2665 states, 2661 states have (on average 1.636978579481398) internal successors, (4356), 2661 states have internal predecessors, (4356), 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) [2022-01-31 23:42:56,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2665 states to 2665 states and 4359 transitions. [2022-01-31 23:42:56,210 INFO L78 Accepts]: Start accepts. Automaton has 2665 states and 4359 transitions. Word has length 30 [2022-01-31 23:42:56,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:56,210 INFO L470 AbstractCegarLoop]: Abstraction has 2665 states and 4359 transitions. [2022-01-31 23:42:56,210 INFO L471 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) [2022-01-31 23:42:56,210 INFO L276 IsEmpty]: Start isEmpty. Operand 2665 states and 4359 transitions. [2022-01-31 23:42:56,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 23:42:56,212 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:56,212 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:42:56,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 23:42:56,212 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:56,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:56,213 INFO L85 PathProgramCache]: Analyzing trace with hash -319020550, now seen corresponding path program 1 times [2022-01-31 23:42:56,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:56,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [863637476] [2022-01-31 23:42:56,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:56,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:56,214 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:56,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:56,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:56,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:56,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:42:56,230 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:56,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [863637476] [2022-01-31 23:42:56,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [863637476] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:56,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:56,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:42:56,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141792341] [2022-01-31 23:42:56,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:56,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:42:56,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:56,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:42:56,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:42:56,231 INFO L87 Difference]: Start difference. First operand 2665 states and 4359 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) [2022-01-31 23:42:56,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:56,455 INFO L93 Difference]: Finished difference Result 3997 states and 6521 transitions. [2022-01-31 23:42:56,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:42:56,455 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 [2022-01-31 23:42:56,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:56,462 INFO L225 Difference]: With dead ends: 3997 [2022-01-31 23:42:56,462 INFO L226 Difference]: Without dead ends: 2699 [2022-01-31 23:42:56,464 INFO L932 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 [2022-01-31 23:42:56,464 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 178 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-01-31 23:42:56,464 INFO L934 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] [2022-01-31 23:42:56,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2699 states. [2022-01-31 23:42:56,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2699 to 2697. [2022-01-31 23:42:56,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2697 states, 2693 states have (on average 1.617526921648719) internal successors, (4356), 2693 states have internal predecessors, (4356), 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) [2022-01-31 23:42:56,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2697 states to 2697 states and 4359 transitions. [2022-01-31 23:42:56,652 INFO L78 Accepts]: Start accepts. Automaton has 2697 states and 4359 transitions. Word has length 31 [2022-01-31 23:42:56,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:56,652 INFO L470 AbstractCegarLoop]: Abstraction has 2697 states and 4359 transitions. [2022-01-31 23:42:56,652 INFO L471 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) [2022-01-31 23:42:56,652 INFO L276 IsEmpty]: Start isEmpty. Operand 2697 states and 4359 transitions. [2022-01-31 23:42:56,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 23:42:56,655 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:56,655 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:42:56,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 23:42:56,655 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:56,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:56,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1981802040, now seen corresponding path program 1 times [2022-01-31 23:42:56,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:56,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1850672625] [2022-01-31 23:42:56,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:56,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:56,656 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:56,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:56,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:56,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:56,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:42:56,675 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:56,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1850672625] [2022-01-31 23:42:56,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1850672625] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:56,676 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:56,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:42:56,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437176119] [2022-01-31 23:42:56,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:56,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:42:56,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:56,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:42:56,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:42:56,677 INFO L87 Difference]: Start difference. First operand 2697 states and 4359 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) [2022-01-31 23:42:57,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:57,071 INFO L93 Difference]: Finished difference Result 4877 states and 8041 transitions. [2022-01-31 23:42:57,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:42:57,071 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 [2022-01-31 23:42:57,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:57,083 INFO L225 Difference]: With dead ends: 4877 [2022-01-31 23:42:57,083 INFO L226 Difference]: Without dead ends: 4875 [2022-01-31 23:42:57,084 INFO L932 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 [2022-01-31 23:42:57,084 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 194 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-01-31 23:42:57,084 INFO L934 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] [2022-01-31 23:42:57,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4875 states. [2022-01-31 23:42:57,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4875 to 3849. [2022-01-31 23:42:57,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3849 states, 3845 states have (on average 1.5739921976592979) internal successors, (6052), 3845 states have internal predecessors, (6052), 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) [2022-01-31 23:42:57,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3849 states to 3849 states and 6055 transitions. [2022-01-31 23:42:57,342 INFO L78 Accepts]: Start accepts. Automaton has 3849 states and 6055 transitions. Word has length 31 [2022-01-31 23:42:57,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:57,342 INFO L470 AbstractCegarLoop]: Abstraction has 3849 states and 6055 transitions. [2022-01-31 23:42:57,342 INFO L471 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) [2022-01-31 23:42:57,342 INFO L276 IsEmpty]: Start isEmpty. Operand 3849 states and 6055 transitions. [2022-01-31 23:42:57,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 23:42:57,346 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:57,346 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:42:57,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 23:42:57,346 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:57,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:57,346 INFO L85 PathProgramCache]: Analyzing trace with hash 393454138, now seen corresponding path program 1 times [2022-01-31 23:42:57,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:57,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150256608] [2022-01-31 23:42:57,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:57,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:57,347 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:57,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:57,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:57,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:57,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:42:57,370 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:57,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150256608] [2022-01-31 23:42:57,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1150256608] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:57,371 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:57,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:42:57,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47902975] [2022-01-31 23:42:57,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:57,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:42:57,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:57,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:42:57,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:42:57,371 INFO L87 Difference]: Start difference. First operand 3849 states and 6055 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) [2022-01-31 23:42:57,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:57,783 INFO L93 Difference]: Finished difference Result 9037 states and 14313 transitions. [2022-01-31 23:42:57,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:42:57,783 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 [2022-01-31 23:42:57,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:57,807 INFO L225 Difference]: With dead ends: 9037 [2022-01-31 23:42:57,807 INFO L226 Difference]: Without dead ends: 5259 [2022-01-31 23:42:57,815 INFO L932 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 [2022-01-31 23:42:57,816 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 172 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-01-31 23:42:57,817 INFO L934 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] [2022-01-31 23:42:57,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5259 states. [2022-01-31 23:42:58,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5259 to 5257. [2022-01-31 23:42:58,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5257 states, 5253 states have (on average 1.5724347991623835) internal successors, (8260), 5253 states have internal predecessors, (8260), 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) [2022-01-31 23:42:58,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5257 states to 5257 states and 8263 transitions. [2022-01-31 23:42:58,291 INFO L78 Accepts]: Start accepts. Automaton has 5257 states and 8263 transitions. Word has length 31 [2022-01-31 23:42:58,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:58,291 INFO L470 AbstractCegarLoop]: Abstraction has 5257 states and 8263 transitions. [2022-01-31 23:42:58,292 INFO L471 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) [2022-01-31 23:42:58,292 INFO L276 IsEmpty]: Start isEmpty. Operand 5257 states and 8263 transitions. [2022-01-31 23:42:58,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 23:42:58,296 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:58,296 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:42:58,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 23:42:58,297 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:58,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:58,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1306535229, now seen corresponding path program 1 times [2022-01-31 23:42:58,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:58,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2101338443] [2022-01-31 23:42:58,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:58,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:58,298 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:58,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:58,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:58,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:58,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:42:58,315 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:58,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2101338443] [2022-01-31 23:42:58,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2101338443] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:58,315 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:58,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:42:58,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942771433] [2022-01-31 23:42:58,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:58,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:42:58,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:58,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:42:58,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:42:58,316 INFO L87 Difference]: Start difference. First operand 5257 states and 8263 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) [2022-01-31 23:42:58,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:58,767 INFO L93 Difference]: Finished difference Result 7885 states and 12361 transitions. [2022-01-31 23:42:58,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:42:58,768 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 [2022-01-31 23:42:58,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:58,776 INFO L225 Difference]: With dead ends: 7885 [2022-01-31 23:42:58,776 INFO L226 Difference]: Without dead ends: 5323 [2022-01-31 23:42:58,781 INFO L932 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 [2022-01-31 23:42:58,782 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 177 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-01-31 23:42:58,782 INFO L934 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] [2022-01-31 23:42:58,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5323 states. [2022-01-31 23:42:59,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5323 to 5321. [2022-01-31 23:42:59,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5321 states, 5317 states have (on average 1.5535076170772992) internal successors, (8260), 5317 states have internal predecessors, (8260), 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) [2022-01-31 23:42:59,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5321 states to 5321 states and 8263 transitions. [2022-01-31 23:42:59,157 INFO L78 Accepts]: Start accepts. Automaton has 5321 states and 8263 transitions. Word has length 32 [2022-01-31 23:42:59,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:59,157 INFO L470 AbstractCegarLoop]: Abstraction has 5321 states and 8263 transitions. [2022-01-31 23:42:59,157 INFO L471 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) [2022-01-31 23:42:59,157 INFO L276 IsEmpty]: Start isEmpty. Operand 5321 states and 8263 transitions. [2022-01-31 23:42:59,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 23:42:59,161 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:59,161 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:42:59,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 23:42:59,161 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:59,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:59,161 INFO L85 PathProgramCache]: Analyzing trace with hash -687609477, now seen corresponding path program 1 times [2022-01-31 23:42:59,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:59,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399086966] [2022-01-31 23:42:59,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:59,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:59,162 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:59,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:59,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:59,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:59,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:42:59,178 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:59,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399086966] [2022-01-31 23:42:59,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1399086966] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:59,178 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:59,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:42:59,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718802075] [2022-01-31 23:42:59,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:59,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:42:59,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:59,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:42:59,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:42:59,179 INFO L87 Difference]: Start difference. First operand 5321 states and 8263 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) [2022-01-31 23:42:59,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:59,854 INFO L93 Difference]: Finished difference Result 9485 states and 15049 transitions. [2022-01-31 23:42:59,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:42:59,855 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 [2022-01-31 23:42:59,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:59,878 INFO L225 Difference]: With dead ends: 9485 [2022-01-31 23:42:59,878 INFO L226 Difference]: Without dead ends: 9483 [2022-01-31 23:42:59,881 INFO L932 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 [2022-01-31 23:42:59,881 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 187 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-01-31 23:42:59,881 INFO L934 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] [2022-01-31 23:42:59,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9483 states. [2022-01-31 23:43:00,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9483 to 7689. [2022-01-31 23:43:00,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7689 states, 7685 states have (on average 1.5078724788549123) internal successors, (11588), 7685 states have internal predecessors, (11588), 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) [2022-01-31 23:43:00,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7689 states to 7689 states and 11591 transitions. [2022-01-31 23:43:00,514 INFO L78 Accepts]: Start accepts. Automaton has 7689 states and 11591 transitions. Word has length 32 [2022-01-31 23:43:00,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:00,514 INFO L470 AbstractCegarLoop]: Abstraction has 7689 states and 11591 transitions. [2022-01-31 23:43:00,515 INFO L471 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) [2022-01-31 23:43:00,515 INFO L276 IsEmpty]: Start isEmpty. Operand 7689 states and 11591 transitions. [2022-01-31 23:43:00,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 23:43:00,522 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:00,522 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:43:00,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 23:43:00,523 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:00,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:00,523 INFO L85 PathProgramCache]: Analyzing trace with hash 2019009917, now seen corresponding path program 1 times [2022-01-31 23:43:00,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:00,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12954411] [2022-01-31 23:43:00,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:00,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:00,524 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:00,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:00,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:00,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:00,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:43:00,542 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:00,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12954411] [2022-01-31 23:43:00,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [12954411] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:00,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:00,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:43:00,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122332287] [2022-01-31 23:43:00,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:00,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:43:00,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:00,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:43:00,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:43:00,543 INFO L87 Difference]: Start difference. First operand 7689 states and 11591 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) [2022-01-31 23:43:01,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:01,520 INFO L93 Difference]: Finished difference Result 17933 states and 27209 transitions. [2022-01-31 23:43:01,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:43:01,522 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 [2022-01-31 23:43:01,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:01,537 INFO L225 Difference]: With dead ends: 17933 [2022-01-31 23:43:01,537 INFO L226 Difference]: Without dead ends: 10379 [2022-01-31 23:43:01,549 INFO L932 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 [2022-01-31 23:43:01,550 INFO L933 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 [2022-01-31 23:43:01,550 INFO L934 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] [2022-01-31 23:43:01,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10379 states. [2022-01-31 23:43:02,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10379 to 10377. [2022-01-31 23:43:02,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10377 states, 10373 states have (on average 1.5058324496288442) internal successors, (15620), 10373 states have internal predecessors, (15620), 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) [2022-01-31 23:43:02,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10377 states to 10377 states and 15623 transitions. [2022-01-31 23:43:02,283 INFO L78 Accepts]: Start accepts. Automaton has 10377 states and 15623 transitions. Word has length 32 [2022-01-31 23:43:02,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:02,283 INFO L470 AbstractCegarLoop]: Abstraction has 10377 states and 15623 transitions. [2022-01-31 23:43:02,283 INFO L471 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) [2022-01-31 23:43:02,283 INFO L276 IsEmpty]: Start isEmpty. Operand 10377 states and 15623 transitions. [2022-01-31 23:43:02,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 23:43:02,290 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:02,290 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:43:02,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 23:43:02,291 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:02,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:02,291 INFO L85 PathProgramCache]: Analyzing trace with hash 159157167, now seen corresponding path program 1 times [2022-01-31 23:43:02,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:02,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [27590369] [2022-01-31 23:43:02,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:02,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:02,292 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:02,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:02,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:02,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:02,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:43:02,306 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:02,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [27590369] [2022-01-31 23:43:02,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [27590369] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:02,306 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:02,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:43:02,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307530750] [2022-01-31 23:43:02,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:02,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:43:02,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:02,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:43:02,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:43:02,307 INFO L87 Difference]: Start difference. First operand 10377 states and 15623 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) [2022-01-31 23:43:03,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:03,143 INFO L93 Difference]: Finished difference Result 15565 states and 23369 transitions. [2022-01-31 23:43:03,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:43:03,143 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 [2022-01-31 23:43:03,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:03,156 INFO L225 Difference]: With dead ends: 15565 [2022-01-31 23:43:03,156 INFO L226 Difference]: Without dead ends: 10507 [2022-01-31 23:43:03,165 INFO L932 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 [2022-01-31 23:43:03,166 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 176 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-01-31 23:43:03,166 INFO L934 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] [2022-01-31 23:43:03,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10507 states. [2022-01-31 23:43:03,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10507 to 10505. [2022-01-31 23:43:03,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10505 states, 10501 states have (on average 1.4874773831063708) internal successors, (15620), 10501 states have internal predecessors, (15620), 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) [2022-01-31 23:43:03,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10505 states to 10505 states and 15623 transitions. [2022-01-31 23:43:03,961 INFO L78 Accepts]: Start accepts. Automaton has 10505 states and 15623 transitions. Word has length 33 [2022-01-31 23:43:03,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:03,961 INFO L470 AbstractCegarLoop]: Abstraction has 10505 states and 15623 transitions. [2022-01-31 23:43:03,961 INFO L471 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) [2022-01-31 23:43:03,961 INFO L276 IsEmpty]: Start isEmpty. Operand 10505 states and 15623 transitions. [2022-01-31 23:43:03,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 23:43:03,968 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:03,968 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:43:03,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 23:43:03,968 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:03,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:03,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1834987539, now seen corresponding path program 1 times [2022-01-31 23:43:03,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:03,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [64008319] [2022-01-31 23:43:03,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:03,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:03,969 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:03,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:03,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:03,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:03,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:43:03,986 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:03,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [64008319] [2022-01-31 23:43:03,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [64008319] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:03,986 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:03,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:43:03,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941452860] [2022-01-31 23:43:03,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:03,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:43:03,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:03,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:43:03,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:43:03,986 INFO L87 Difference]: Start difference. First operand 10505 states and 15623 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) [2022-01-31 23:43:05,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:05,575 INFO L93 Difference]: Finished difference Result 18445 states and 28041 transitions. [2022-01-31 23:43:05,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:43:05,575 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 [2022-01-31 23:43:05,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:05,605 INFO L225 Difference]: With dead ends: 18445 [2022-01-31 23:43:05,605 INFO L226 Difference]: Without dead ends: 18443 [2022-01-31 23:43:05,613 INFO L932 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 [2022-01-31 23:43:05,613 INFO L933 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 [2022-01-31 23:43:05,614 INFO L934 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] [2022-01-31 23:43:05,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18443 states. [2022-01-31 23:43:06,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18443 to 15369. [2022-01-31 23:43:06,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15369 states, 15365 states have (on average 1.4414578587699316) internal successors, (22148), 15365 states have internal predecessors, (22148), 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) [2022-01-31 23:43:06,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15369 states to 15369 states and 22151 transitions. [2022-01-31 23:43:06,807 INFO L78 Accepts]: Start accepts. Automaton has 15369 states and 22151 transitions. Word has length 33 [2022-01-31 23:43:06,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:06,808 INFO L470 AbstractCegarLoop]: Abstraction has 15369 states and 22151 transitions. [2022-01-31 23:43:06,808 INFO L471 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) [2022-01-31 23:43:06,808 INFO L276 IsEmpty]: Start isEmpty. Operand 15369 states and 22151 transitions. [2022-01-31 23:43:06,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 23:43:06,820 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:06,820 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:43:06,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 23:43:06,821 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:06,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:06,821 INFO L85 PathProgramCache]: Analyzing trace with hash 871631855, now seen corresponding path program 1 times [2022-01-31 23:43:06,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:06,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [154134066] [2022-01-31 23:43:06,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:06,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:06,822 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:06,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:06,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:06,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:06,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:43:06,837 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:06,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [154134066] [2022-01-31 23:43:06,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [154134066] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:06,837 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:06,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:43:06,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582692632] [2022-01-31 23:43:06,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:06,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:43:06,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:06,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:43:06,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:43:06,838 INFO L87 Difference]: Start difference. First operand 15369 states and 22151 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) [2022-01-31 23:43:08,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:08,572 INFO L93 Difference]: Finished difference Result 35597 states and 51593 transitions. [2022-01-31 23:43:08,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:43:08,572 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 [2022-01-31 23:43:08,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:08,602 INFO L225 Difference]: With dead ends: 35597 [2022-01-31 23:43:08,602 INFO L226 Difference]: Without dead ends: 20491 [2022-01-31 23:43:08,623 INFO L932 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 [2022-01-31 23:43:08,624 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 160 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-01-31 23:43:08,624 INFO L934 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] [2022-01-31 23:43:08,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20491 states. [2022-01-31 23:43:10,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20491 to 20489. [2022-01-31 23:43:10,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20489 states, 20485 states have (on average 1.437344398340249) internal successors, (29444), 20485 states have internal predecessors, (29444), 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) [2022-01-31 23:43:10,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20489 states to 20489 states and 29447 transitions. [2022-01-31 23:43:10,356 INFO L78 Accepts]: Start accepts. Automaton has 20489 states and 29447 transitions. Word has length 33 [2022-01-31 23:43:10,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:10,357 INFO L470 AbstractCegarLoop]: Abstraction has 20489 states and 29447 transitions. [2022-01-31 23:43:10,357 INFO L471 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) [2022-01-31 23:43:10,357 INFO L276 IsEmpty]: Start isEmpty. Operand 20489 states and 29447 transitions. [2022-01-31 23:43:10,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 23:43:10,370 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:10,370 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:43:10,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 23:43:10,370 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:10,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:10,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1049824046, now seen corresponding path program 1 times [2022-01-31 23:43:10,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:10,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7139554] [2022-01-31 23:43:10,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:10,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:10,371 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:10,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:10,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:10,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:10,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:43:10,397 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:10,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7139554] [2022-01-31 23:43:10,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [7139554] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:10,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:10,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:43:10,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411706105] [2022-01-31 23:43:10,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:10,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:43:10,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:10,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:43:10,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:43:10,398 INFO L87 Difference]: Start difference. First operand 20489 states and 29447 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) [2022-01-31 23:43:12,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:12,090 INFO L93 Difference]: Finished difference Result 30733 states and 44041 transitions. [2022-01-31 23:43:12,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:43:12,090 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 [2022-01-31 23:43:12,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:12,121 INFO L225 Difference]: With dead ends: 30733 [2022-01-31 23:43:12,121 INFO L226 Difference]: Without dead ends: 20747 [2022-01-31 23:43:12,142 INFO L932 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 [2022-01-31 23:43:12,142 INFO L933 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 [2022-01-31 23:43:12,142 INFO L934 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] [2022-01-31 23:43:12,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20747 states. [2022-01-31 23:43:13,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20747 to 20745. [2022-01-31 23:43:13,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20745 states, 20741 states have (on average 1.4196036835253845) internal successors, (29444), 20741 states have internal predecessors, (29444), 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) [2022-01-31 23:43:13,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20745 states to 20745 states and 29447 transitions. [2022-01-31 23:43:13,853 INFO L78 Accepts]: Start accepts. Automaton has 20745 states and 29447 transitions. Word has length 34 [2022-01-31 23:43:13,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:13,853 INFO L470 AbstractCegarLoop]: Abstraction has 20745 states and 29447 transitions. [2022-01-31 23:43:13,853 INFO L471 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) [2022-01-31 23:43:13,853 INFO L276 IsEmpty]: Start isEmpty. Operand 20745 states and 29447 transitions. [2022-01-31 23:43:13,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 23:43:13,865 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:13,865 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:43:13,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 23:43:13,865 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:13,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:13,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1250998544, now seen corresponding path program 1 times [2022-01-31 23:43:13,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:13,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1894694142] [2022-01-31 23:43:13,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:13,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:13,867 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:13,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:13,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:13,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:13,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:43:13,882 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:13,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1894694142] [2022-01-31 23:43:13,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1894694142] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:13,882 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:13,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:43:13,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479935473] [2022-01-31 23:43:13,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:13,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:43:13,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:13,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:43:13,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:43:13,882 INFO L87 Difference]: Start difference. First operand 20745 states and 29447 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) [2022-01-31 23:43:17,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:17,184 INFO L93 Difference]: Finished difference Result 60685 states and 85257 transitions. [2022-01-31 23:43:17,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:43:17,185 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 [2022-01-31 23:43:17,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:17,249 INFO L225 Difference]: With dead ends: 60685 [2022-01-31 23:43:17,250 INFO L226 Difference]: Without dead ends: 40459 [2022-01-31 23:43:17,290 INFO L932 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 [2022-01-31 23:43:17,290 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 191 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 111 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 [2022-01-31 23:43:17,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 111 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:43:17,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40459 states. [2022-01-31 23:43:20,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40459 to 40457. [2022-01-31 23:43:20,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40457 states, 40453 states have (on average 1.3796751786023287) internal successors, (55812), 40453 states have internal predecessors, (55812), 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) [2022-01-31 23:43:20,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40457 states to 40457 states and 55815 transitions. [2022-01-31 23:43:20,984 INFO L78 Accepts]: Start accepts. Automaton has 40457 states and 55815 transitions. Word has length 34 [2022-01-31 23:43:20,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:20,984 INFO L470 AbstractCegarLoop]: Abstraction has 40457 states and 55815 transitions. [2022-01-31 23:43:20,984 INFO L471 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) [2022-01-31 23:43:20,984 INFO L276 IsEmpty]: Start isEmpty. Operand 40457 states and 55815 transitions. [2022-01-31 23:43:21,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 23:43:21,003 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:21,003 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:43:21,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 23:43:21,004 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:21,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:21,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1455620850, now seen corresponding path program 1 times [2022-01-31 23:43:21,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:21,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [182907517] [2022-01-31 23:43:21,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:21,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:21,005 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:21,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:21,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:21,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:21,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:43:21,023 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:21,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [182907517] [2022-01-31 23:43:21,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [182907517] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:21,023 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:21,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:43:21,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221004044] [2022-01-31 23:43:21,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:21,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:43:21,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:21,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:43:21,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:43:21,024 INFO L87 Difference]: Start difference. First operand 40457 states and 55815 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) [2022-01-31 23:43:25,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:25,134 INFO L93 Difference]: Finished difference Result 45581 states and 65033 transitions. [2022-01-31 23:43:25,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:43:25,134 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 [2022-01-31 23:43:25,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:25,207 INFO L225 Difference]: With dead ends: 45581 [2022-01-31 23:43:25,207 INFO L226 Difference]: Without dead ends: 45579 [2022-01-31 23:43:25,223 INFO L932 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 [2022-01-31 23:43:25,224 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 118 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 144 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 [2022-01-31 23:43:25,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 144 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:43:25,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45579 states. [2022-01-31 23:43:28,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45579 to 40457. [2022-01-31 23:43:28,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40457 states, 40453 states have (on average 1.3670185153140681) internal successors, (55300), 40453 states have internal predecessors, (55300), 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) [2022-01-31 23:43:28,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40457 states to 40457 states and 55303 transitions. [2022-01-31 23:43:28,817 INFO L78 Accepts]: Start accepts. Automaton has 40457 states and 55303 transitions. Word has length 34 [2022-01-31 23:43:28,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:28,817 INFO L470 AbstractCegarLoop]: Abstraction has 40457 states and 55303 transitions. [2022-01-31 23:43:28,817 INFO L471 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) [2022-01-31 23:43:28,817 INFO L276 IsEmpty]: Start isEmpty. Operand 40457 states and 55303 transitions. [2022-01-31 23:43:28,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 23:43:28,836 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:28,836 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:43:28,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 23:43:28,837 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:28,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:28,837 INFO L85 PathProgramCache]: Analyzing trace with hash 126464356, now seen corresponding path program 1 times [2022-01-31 23:43:28,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:28,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1252674870] [2022-01-31 23:43:28,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:28,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:28,838 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:28,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:28,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:28,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:28,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:43:28,856 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:28,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1252674870] [2022-01-31 23:43:28,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1252674870] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:28,857 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:28,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:43:28,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392216841] [2022-01-31 23:43:28,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:28,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:43:28,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:28,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:43:28,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:43:28,858 INFO L87 Difference]: Start difference. First operand 40457 states and 55303 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) [2022-01-31 23:43:35,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:35,173 INFO L93 Difference]: Finished difference Result 69133 states and 96265 transitions. [2022-01-31 23:43:35,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:43:35,173 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 [2022-01-31 23:43:35,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:35,286 INFO L225 Difference]: With dead ends: 69133 [2022-01-31 23:43:35,286 INFO L226 Difference]: Without dead ends: 69131 [2022-01-31 23:43:35,309 INFO L932 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 [2022-01-31 23:43:35,310 INFO L933 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 [2022-01-31 23:43:35,310 INFO L934 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] [2022-01-31 23:43:35,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69131 states. [2022-01-31 23:43:40,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69131 to 60937. [2022-01-31 23:43:40,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60937 states, 60933 states have (on average 1.3276877882264126) internal successors, (80900), 60933 states have internal predecessors, (80900), 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) [2022-01-31 23:43:41,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60937 states to 60937 states and 80903 transitions. [2022-01-31 23:43:41,073 INFO L78 Accepts]: Start accepts. Automaton has 60937 states and 80903 transitions. Word has length 35 [2022-01-31 23:43:41,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:41,073 INFO L470 AbstractCegarLoop]: Abstraction has 60937 states and 80903 transitions. [2022-01-31 23:43:41,073 INFO L471 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) [2022-01-31 23:43:41,073 INFO L276 IsEmpty]: Start isEmpty. Operand 60937 states and 80903 transitions. [2022-01-31 23:43:41,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 23:43:41,117 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:41,117 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:43:41,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 23:43:41,117 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:41,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:41,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1461883546, now seen corresponding path program 1 times [2022-01-31 23:43:41,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:41,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [455189514] [2022-01-31 23:43:41,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:41,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:41,119 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:41,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:41,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:41,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:41,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:43:41,141 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:41,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [455189514] [2022-01-31 23:43:41,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [455189514] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:41,141 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:41,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:43:41,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212077074] [2022-01-31 23:43:41,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:41,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:43:41,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:41,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:43:41,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:43:41,142 INFO L87 Difference]: Start difference. First operand 60937 states and 80903 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) [2022-01-31 23:43:48,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:48,585 INFO L93 Difference]: Finished difference Result 139789 states and 186377 transitions. [2022-01-31 23:43:48,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:43:48,586 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 [2022-01-31 23:43:48,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:48,718 INFO L225 Difference]: With dead ends: 139789 [2022-01-31 23:43:48,718 INFO L226 Difference]: Without dead ends: 79371 [2022-01-31 23:43:48,795 INFO L932 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 [2022-01-31 23:43:48,796 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 148 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-01-31 23:43:48,796 INFO L934 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] [2022-01-31 23:43:48,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79371 states. [2022-01-31 23:43:55,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79371 to 79369. [2022-01-31 23:43:55,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79369 states, 79365 states have (on average 1.3160965160965161) internal successors, (104452), 79365 states have internal predecessors, (104452), 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) [2022-01-31 23:43:56,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79369 states to 79369 states and 104455 transitions. [2022-01-31 23:43:56,163 INFO L78 Accepts]: Start accepts. Automaton has 79369 states and 104455 transitions. Word has length 35 [2022-01-31 23:43:56,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:56,163 INFO L470 AbstractCegarLoop]: Abstraction has 79369 states and 104455 transitions. [2022-01-31 23:43:56,163 INFO L471 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) [2022-01-31 23:43:56,163 INFO L276 IsEmpty]: Start isEmpty. Operand 79369 states and 104455 transitions. [2022-01-31 23:43:56,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 23:43:56,219 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:56,219 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:43:56,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 23:43:56,219 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:56,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:56,219 INFO L85 PathProgramCache]: Analyzing trace with hash -374356763, now seen corresponding path program 1 times [2022-01-31 23:43:56,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:56,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652923701] [2022-01-31 23:43:56,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:56,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:56,221 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:56,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:56,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:56,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:56,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:43:56,239 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:56,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652923701] [2022-01-31 23:43:56,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [652923701] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:56,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:56,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:43:56,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068456035] [2022-01-31 23:43:56,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:56,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:43:56,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:56,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:43:56,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:43:56,240 INFO L87 Difference]: Start difference. First operand 79369 states and 104455 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) [2022-01-31 23:44:03,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:44:03,511 INFO L93 Difference]: Finished difference Result 119821 states and 157705 transitions. [2022-01-31 23:44:03,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:44:03,512 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 [2022-01-31 23:44:03,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:44:03,650 INFO L225 Difference]: With dead ends: 119821 [2022-01-31 23:44:03,650 INFO L226 Difference]: Without dead ends: 80907 [2022-01-31 23:44:03,726 INFO L932 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 [2022-01-31 23:44:03,727 INFO L933 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 [2022-01-31 23:44:03,727 INFO L934 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] [2022-01-31 23:44:03,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80907 states. [2022-01-31 23:44:11,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80907 to 80905. [2022-01-31 23:44:11,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80905 states, 80901 states have (on average 1.3037663316893486) internal successors, (105476), 80901 states have internal predecessors, (105476), 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) [2022-01-31 23:44:11,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80905 states to 80905 states and 105479 transitions. [2022-01-31 23:44:11,862 INFO L78 Accepts]: Start accepts. Automaton has 80905 states and 105479 transitions. Word has length 36 [2022-01-31 23:44:11,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:44:11,862 INFO L470 AbstractCegarLoop]: Abstraction has 80905 states and 105479 transitions. [2022-01-31 23:44:11,862 INFO L471 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) [2022-01-31 23:44:11,862 INFO L276 IsEmpty]: Start isEmpty. Operand 80905 states and 105479 transitions. [2022-01-31 23:44:11,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 23:44:11,906 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:44:11,906 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:44:11,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 23:44:11,906 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:44:11,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:44:11,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1926465827, now seen corresponding path program 1 times [2022-01-31 23:44:11,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:44:11,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638506587] [2022-01-31 23:44:11,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:44:11,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:44:11,908 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:44:11,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:11,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:44:11,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:11,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:44:11,931 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:44:11,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638506587] [2022-01-31 23:44:11,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [638506587] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:44:11,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:44:11,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:44:11,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946584549] [2022-01-31 23:44:11,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:44:11,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:44:11,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:44:11,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:44:11,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:44:11,932 INFO L87 Difference]: Start difference. First operand 80905 states and 105479 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) [2022-01-31 23:44:24,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:44:24,808 INFO L93 Difference]: Finished difference Result 135181 states and 178185 transitions. [2022-01-31 23:44:24,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:44:24,809 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 [2022-01-31 23:44:24,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:44:25,068 INFO L225 Difference]: With dead ends: 135181 [2022-01-31 23:44:25,069 INFO L226 Difference]: Without dead ends: 135179 [2022-01-31 23:44:25,121 INFO L932 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 [2022-01-31 23:44:25,122 INFO L933 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 [2022-01-31 23:44:25,122 INFO L934 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] [2022-01-31 23:44:25,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135179 states. [2022-01-31 23:44:37,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135179 to 122889. [2022-01-31 23:44:37,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122889 states, 122885 states have (on average 1.2666476787240102) internal successors, (155652), 122885 states have internal predecessors, (155652), 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) [2022-01-31 23:44:37,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122889 states to 122889 states and 155655 transitions. [2022-01-31 23:44:37,952 INFO L78 Accepts]: Start accepts. Automaton has 122889 states and 155655 transitions. Word has length 36 [2022-01-31 23:44:37,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:44:37,953 INFO L470 AbstractCegarLoop]: Abstraction has 122889 states and 155655 transitions. [2022-01-31 23:44:37,953 INFO L471 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) [2022-01-31 23:44:37,953 INFO L276 IsEmpty]: Start isEmpty. Operand 122889 states and 155655 transitions. [2022-01-31 23:44:38,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 23:44:38,050 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:44:38,050 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:44:38,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 23:44:38,050 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:44:38,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:44:38,050 INFO L85 PathProgramCache]: Analyzing trace with hash 338117925, now seen corresponding path program 1 times [2022-01-31 23:44:38,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:44:38,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [505931172] [2022-01-31 23:44:38,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:44:38,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:44:38,052 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:44:38,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:38,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:44:38,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:38,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:44:38,072 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:44:38,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [505931172] [2022-01-31 23:44:38,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [505931172] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:44:38,072 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:44:38,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:44:38,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780318820] [2022-01-31 23:44:38,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:44:38,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:44:38,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:44:38,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:44:38,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:44:38,073 INFO L87 Difference]: Start difference. First operand 122889 states and 155655 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) [2022-01-31 23:44:53,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:44:53,913 INFO L93 Difference]: Finished difference Result 278541 states and 352265 transitions. [2022-01-31 23:44:53,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:44:53,914 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 [2022-01-31 23:44:53,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:44:54,279 INFO L225 Difference]: With dead ends: 278541 [2022-01-31 23:44:54,279 INFO L226 Difference]: Without dead ends: 157707 [2022-01-31 23:44:54,429 INFO L932 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 [2022-01-31 23:44:54,431 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 142 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:44:54,431 INFO L934 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] [2022-01-31 23:44:54,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157707 states. [2022-01-31 23:45:10,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157707 to 157705. [2022-01-31 23:45:10,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157705 states, 157701 states have (on average 1.246739082187177) internal successors, (196612), 157701 states have internal predecessors, (196612), 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) [2022-01-31 23:45:10,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157705 states to 157705 states and 196615 transitions. [2022-01-31 23:45:10,768 INFO L78 Accepts]: Start accepts. Automaton has 157705 states and 196615 transitions. Word has length 36 [2022-01-31 23:45:10,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:45:10,768 INFO L470 AbstractCegarLoop]: Abstraction has 157705 states and 196615 transitions. [2022-01-31 23:45:10,769 INFO L471 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) [2022-01-31 23:45:10,769 INFO L276 IsEmpty]: Start isEmpty. Operand 157705 states and 196615 transitions. [2022-01-31 23:45:10,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-31 23:45:10,874 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:45:10,875 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:45:10,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 23:45:10,875 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:45:10,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:45:10,875 INFO L85 PathProgramCache]: Analyzing trace with hash -408885669, now seen corresponding path program 1 times [2022-01-31 23:45:10,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:45:10,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [402364629] [2022-01-31 23:45:10,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:45:10,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:45:10,878 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:45:10,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:45:10,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:45:10,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:45:10,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:45:10,909 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:45:10,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [402364629] [2022-01-31 23:45:10,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [402364629] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:45:10,909 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:45:10,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:45:10,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606368731] [2022-01-31 23:45:10,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:45:10,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:45:10,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:45:10,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:45:10,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:45:10,910 INFO L87 Difference]: Start difference. First operand 157705 states and 196615 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) [2022-01-31 23:45:26,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:45:26,931 INFO L93 Difference]: Finished difference Result 236557 states and 293897 transitions. [2022-01-31 23:45:26,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:45:26,932 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 [2022-01-31 23:45:26,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:45:27,279 INFO L225 Difference]: With dead ends: 236557 [2022-01-31 23:45:27,279 INFO L226 Difference]: Without dead ends: 159755 [2022-01-31 23:45:27,408 INFO L932 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 [2022-01-31 23:45:27,408 INFO L933 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 [2022-01-31 23:45:27,408 INFO L934 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] [2022-01-31 23:45:27,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159755 states.