/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_10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 23:42:47,573 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 23:42:47,574 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 23:42:47,620 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 23:42:47,626 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 23:42:47,626 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 23:42:47,628 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 23:42:47,629 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 23:42:47,629 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 23:42:47,630 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 23:42:47,630 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 23:42:47,632 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 23:42:47,632 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 23:42:47,633 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 23:42:47,634 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 23:42:47,634 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 23:42:47,636 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 23:42:47,640 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 23:42:47,641 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 23:42:47,641 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 23:42:47,642 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 23:42:47,647 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 23:42:47,648 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 23:42:47,648 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 23:42:47,649 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 23:42:47,649 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 23:42:47,649 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 23:42:47,649 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 23:42:47,649 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 23:42:47,649 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 23:42:47,649 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 23:42:47,649 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 23:42:47,649 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 23:42:47,649 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 23:42:47,649 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 23:42:47,650 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 23:42:47,650 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 23:42:47,650 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 23:42:47,650 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 23:42:47,650 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 23:42:47,650 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-01-31 23:42:47,650 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 23:42:47,816 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 23:42:47,837 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 23:42:47,841 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 23:42:47,842 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 23:42:47,842 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 23:42:47,843 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_10.c [2022-01-31 23:42:47,899 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96025d5a2/dfa058e88d7e40de89cced271cc89498/FLAG8c0cb8721 [2022-01-31 23:42:48,250 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 23:42:48,251 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_10.c [2022-01-31 23:42:48,257 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96025d5a2/dfa058e88d7e40de89cced271cc89498/FLAG8c0cb8721 [2022-01-31 23:42:48,672 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96025d5a2/dfa058e88d7e40de89cced271cc89498 [2022-01-31 23:42:48,674 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 23:42:48,674 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 23:42:48,675 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 23:42:48,675 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 23:42:48,681 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 23:42:48,681 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 11:42:48" (1/1) ... [2022-01-31 23:42:48,682 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@233fe667 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:42:48, skipping insertion in model container [2022-01-31 23:42:48,682 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 11:42:48" (1/1) ... [2022-01-31 23:42:48,686 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 23:42:48,701 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 23:42:48,828 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_10.c[3901,3914] [2022-01-31 23:42:48,831 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 23:42:48,840 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 23:42:48,870 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_10.c[3901,3914] [2022-01-31 23:42:48,870 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 23:42:48,880 INFO L208 MainTranslator]: Completed translation [2022-01-31 23:42:48,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:42:48 WrapperNode [2022-01-31 23:42:48,881 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 23:42:48,882 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 23:42:48,882 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 23:42:48,882 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 23:42:48,889 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:42:48" (1/1) ... [2022-01-31 23:42:48,889 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:42:48" (1/1) ... [2022-01-31 23:42:48,893 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:42:48" (1/1) ... [2022-01-31 23:42:48,893 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:42:48" (1/1) ... [2022-01-31 23:42:48,896 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:42:48" (1/1) ... [2022-01-31 23:42:48,899 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:42:48" (1/1) ... [2022-01-31 23:42:48,900 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:42:48" (1/1) ... [2022-01-31 23:42:48,901 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 23:42:48,902 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 23:42:48,902 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 23:42:48,902 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 23:42:48,903 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:42:48" (1/1) ... [2022-01-31 23:42:48,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 23:42:48,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 23:42:48,941 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 23:42:48,948 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 23:42:48,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 23:42:48,966 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 23:42:48,966 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 23:42:48,966 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 23:42:48,966 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 23:42:48,966 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 23:42:48,966 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 23:42:48,966 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 23:42:48,966 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 23:42:48,966 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 23:42:48,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 23:42:48,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 23:42:48,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 23:42:48,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 23:42:48,967 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 23:42:48,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 23:42:49,009 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 23:42:49,010 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 23:42:49,125 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 23:42:49,129 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 23:42:49,130 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-31 23:42:49,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:42:49 BoogieIcfgContainer [2022-01-31 23:42:49,131 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 23:42:49,132 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 23:42:49,132 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 23:42:49,134 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 23:42:49,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 11:42:48" (1/3) ... [2022-01-31 23:42:49,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@359f44cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 11:42:49, skipping insertion in model container [2022-01-31 23:42:49,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:42:48" (2/3) ... [2022-01-31 23:42:49,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@359f44cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 11:42:49, skipping insertion in model container [2022-01-31 23:42:49,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:42:49" (3/3) ... [2022-01-31 23:42:49,136 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_10.c [2022-01-31 23:42:49,139 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 23:42:49,139 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 23:42:49,164 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 23:42:49,168 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 23:42:49,169 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 23:42:49,177 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 40 states have internal predecessors, (73), 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 23:42:49,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-31 23:42:49,182 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:49,183 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] [2022-01-31 23:42:49,183 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:49,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:49,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1465526181, now seen corresponding path program 1 times [2022-01-31 23:42:49,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:49,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670049340] [2022-01-31 23:42:49,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:49,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:49,231 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:49,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:49,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:49,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:49,331 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 23:42:49,332 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:49,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1670049340] [2022-01-31 23:42:49,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1670049340] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:49,334 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:49,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:42:49,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147388492] [2022-01-31 23:42:49,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:49,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:42:49,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:49,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:42:49,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:42:49,356 INFO L87 Difference]: Start difference. First operand has 45 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 40 states have internal predecessors, (73), 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 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 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 23:42:49,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:49,473 INFO L93 Difference]: Finished difference Result 88 states and 151 transitions. [2022-01-31 23:42:49,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:42:49,475 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 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 21 [2022-01-31 23:42:49,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:49,481 INFO L225 Difference]: With dead ends: 88 [2022-01-31 23:42:49,481 INFO L226 Difference]: Without dead ends: 73 [2022-01-31 23:42:49,483 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 23:42:49,486 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 174 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:49,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 89 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:42:49,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-01-31 23:42:49,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 51. [2022-01-31 23:42:49,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 47 states have (on average 1.851063829787234) internal successors, (87), 47 states have internal predecessors, (87), 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 23:42:49,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 90 transitions. [2022-01-31 23:42:49,516 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 90 transitions. Word has length 21 [2022-01-31 23:42:49,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:49,516 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 90 transitions. [2022-01-31 23:42:49,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 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 23:42:49,517 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 90 transitions. [2022-01-31 23:42:49,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-31 23:42:49,517 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:49,517 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] [2022-01-31 23:42:49,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 23:42:49,518 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:49,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:49,519 INFO L85 PathProgramCache]: Analyzing trace with hash -2052332195, now seen corresponding path program 1 times [2022-01-31 23:42:49,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:49,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [583354827] [2022-01-31 23:42:49,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:49,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:49,521 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:49,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:49,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:49,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:49,565 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 23:42:49,566 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:49,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [583354827] [2022-01-31 23:42:49,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [583354827] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:49,566 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:49,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:42:49,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759013645] [2022-01-31 23:42:49,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:49,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:42:49,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:49,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:42:49,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:42:49,569 INFO L87 Difference]: Start difference. First operand 51 states and 90 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 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 23:42:49,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:49,673 INFO L93 Difference]: Finished difference Result 118 states and 213 transitions. [2022-01-31 23:42:49,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:42:49,673 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 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 21 [2022-01-31 23:42:49,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:49,674 INFO L225 Difference]: With dead ends: 118 [2022-01-31 23:42:49,674 INFO L226 Difference]: Without dead ends: 73 [2022-01-31 23:42:49,677 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 23:42:49,679 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 148 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:49,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 95 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:42:49,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-01-31 23:42:49,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2022-01-31 23:42:49,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 67 states have (on average 1.835820895522388) internal successors, (123), 67 states have internal predecessors, (123), 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 23:42:49,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 126 transitions. [2022-01-31 23:42:49,694 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 126 transitions. Word has length 21 [2022-01-31 23:42:49,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:49,695 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 126 transitions. [2022-01-31 23:42:49,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 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 23:42:49,695 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 126 transitions. [2022-01-31 23:42:49,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 23:42:49,696 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:49,697 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] [2022-01-31 23:42:49,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 23:42:49,698 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:49,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:49,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1813542028, now seen corresponding path program 1 times [2022-01-31 23:42:49,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:49,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2123607786] [2022-01-31 23:42:49,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:49,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:49,704 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:49,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:49,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:49,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:49,765 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 23:42:49,765 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:49,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2123607786] [2022-01-31 23:42:49,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2123607786] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:49,766 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:49,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:42:49,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245969755] [2022-01-31 23:42:49,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:49,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:42:49,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:49,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:42:49,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:42:49,767 INFO L87 Difference]: Start difference. First operand 71 states and 126 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 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 23:42:49,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:49,839 INFO L93 Difference]: Finished difference Result 109 states and 190 transitions. [2022-01-31 23:42:49,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:42:49,840 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 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 22 [2022-01-31 23:42:49,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:49,841 INFO L225 Difference]: With dead ends: 109 [2022-01-31 23:42:49,841 INFO L226 Difference]: Without dead ends: 76 [2022-01-31 23:42:49,842 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 23:42:49,843 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 131 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:49,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 113 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:42:49,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-01-31 23:42:49,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2022-01-31 23:42:49,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 70 states have (on average 1.7857142857142858) internal successors, (125), 70 states have internal predecessors, (125), 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 23:42:49,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 128 transitions. [2022-01-31 23:42:49,854 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 128 transitions. Word has length 22 [2022-01-31 23:42:49,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:49,854 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 128 transitions. [2022-01-31 23:42:49,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 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 23:42:49,855 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 128 transitions. [2022-01-31 23:42:49,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 23:42:49,855 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:49,855 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] [2022-01-31 23:42:49,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 23:42:49,856 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:49,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:49,856 INFO L85 PathProgramCache]: Analyzing trace with hash 802424778, now seen corresponding path program 1 times [2022-01-31 23:42:49,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:49,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [495699339] [2022-01-31 23:42:49,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:49,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:49,858 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:49,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:49,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:49,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:49,911 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 23:42:49,912 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:49,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [495699339] [2022-01-31 23:42:49,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [495699339] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:49,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:49,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:42:49,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406951207] [2022-01-31 23:42:49,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:49,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:42:49,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:49,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:42:49,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:42:49,913 INFO L87 Difference]: Start difference. First operand 74 states and 128 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 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 23:42:50,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:50,001 INFO L93 Difference]: Finished difference Result 202 states and 360 transitions. [2022-01-31 23:42:50,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:42:50,001 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 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 22 [2022-01-31 23:42:50,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:50,004 INFO L225 Difference]: With dead ends: 202 [2022-01-31 23:42:50,004 INFO L226 Difference]: Without dead ends: 137 [2022-01-31 23:42:50,005 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 23:42:50,013 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 163 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:50,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 79 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:42:50,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-01-31 23:42:50,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2022-01-31 23:42:50,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 131 states have (on average 1.786259541984733) internal successors, (234), 131 states have internal predecessors, (234), 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 23:42:50,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 237 transitions. [2022-01-31 23:42:50,037 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 237 transitions. Word has length 22 [2022-01-31 23:42:50,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:50,037 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 237 transitions. [2022-01-31 23:42:50,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 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 23:42:50,037 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 237 transitions. [2022-01-31 23:42:50,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 23:42:50,038 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:50,038 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] [2022-01-31 23:42:50,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 23:42:50,038 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:50,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:50,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1389230792, now seen corresponding path program 1 times [2022-01-31 23:42:50,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:50,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [692193004] [2022-01-31 23:42:50,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:50,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:50,042 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:50,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:50,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:50,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:50,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:42:50,084 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:50,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [692193004] [2022-01-31 23:42:50,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [692193004] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:50,084 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:50,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:42:50,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271784635] [2022-01-31 23:42:50,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:50,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:42:50,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:50,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:42:50,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:42:50,085 INFO L87 Difference]: Start difference. First operand 135 states and 237 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 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 23:42:50,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:50,165 INFO L93 Difference]: Finished difference Result 175 states and 307 transitions. [2022-01-31 23:42:50,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:42:50,166 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 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 22 [2022-01-31 23:42:50,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:50,167 INFO L225 Difference]: With dead ends: 175 [2022-01-31 23:42:50,167 INFO L226 Difference]: Without dead ends: 173 [2022-01-31 23:42:50,168 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 23:42:50,168 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 106 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:50,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 128 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:42:50,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-01-31 23:42:50,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 135. [2022-01-31 23:42:50,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 131 states have (on average 1.7709923664122138) internal successors, (232), 131 states have internal predecessors, (232), 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 23:42:50,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 235 transitions. [2022-01-31 23:42:50,193 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 235 transitions. Word has length 22 [2022-01-31 23:42:50,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:50,193 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 235 transitions. [2022-01-31 23:42:50,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 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 23:42:50,194 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 235 transitions. [2022-01-31 23:42:50,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-31 23:42:50,200 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:50,203 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] [2022-01-31 23:42:50,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 23:42:50,203 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:50,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:50,204 INFO L85 PathProgramCache]: Analyzing trace with hash -894421934, now seen corresponding path program 1 times [2022-01-31 23:42:50,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:50,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1214284658] [2022-01-31 23:42:50,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:50,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:50,205 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:50,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:50,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:50,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:50,266 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 23:42:50,266 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:50,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1214284658] [2022-01-31 23:42:50,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1214284658] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:50,266 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:50,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:42:50,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418230771] [2022-01-31 23:42:50,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:50,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:42:50,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:50,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:42:50,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:42:50,268 INFO L87 Difference]: Start difference. First operand 135 states and 235 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 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 23:42:50,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:50,338 INFO L93 Difference]: Finished difference Result 251 states and 443 transitions. [2022-01-31 23:42:50,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:42:50,338 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 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 23 [2022-01-31 23:42:50,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:50,340 INFO L225 Difference]: With dead ends: 251 [2022-01-31 23:42:50,340 INFO L226 Difference]: Without dead ends: 249 [2022-01-31 23:42:50,340 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 23:42:50,341 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 154 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:50,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 76 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:42:50,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-01-31 23:42:50,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 183. [2022-01-31 23:42:50,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 179 states have (on average 1.7541899441340782) internal successors, (314), 179 states have internal predecessors, (314), 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 23:42:50,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 317 transitions. [2022-01-31 23:42:50,360 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 317 transitions. Word has length 23 [2022-01-31 23:42:50,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:50,360 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 317 transitions. [2022-01-31 23:42:50,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 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 23:42:50,360 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 317 transitions. [2022-01-31 23:42:50,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-31 23:42:50,361 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:50,361 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] [2022-01-31 23:42:50,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 23:42:50,362 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:50,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:50,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1481227948, now seen corresponding path program 1 times [2022-01-31 23:42:50,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:50,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1006971510] [2022-01-31 23:42:50,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:50,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:50,363 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:50,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:50,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:50,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:50,411 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 23:42:50,411 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:50,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1006971510] [2022-01-31 23:42:50,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1006971510] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:50,412 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:50,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:42:50,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162510077] [2022-01-31 23:42:50,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:50,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:42:50,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:50,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:42:50,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:42:50,414 INFO L87 Difference]: Start difference. First operand 183 states and 317 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 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 23:42:50,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:50,488 INFO L93 Difference]: Finished difference Result 431 states and 755 transitions. [2022-01-31 23:42:50,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:42:50,489 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 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 23 [2022-01-31 23:42:50,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:50,491 INFO L225 Difference]: With dead ends: 431 [2022-01-31 23:42:50,491 INFO L226 Difference]: Without dead ends: 257 [2022-01-31 23:42:50,493 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 23:42:50,494 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 136 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:50,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 99 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:42:50,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-01-31 23:42:50,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 255. [2022-01-31 23:42:50,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 251 states have (on average 1.7370517928286853) internal successors, (436), 251 states have internal predecessors, (436), 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 23:42:50,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 439 transitions. [2022-01-31 23:42:50,510 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 439 transitions. Word has length 23 [2022-01-31 23:42:50,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:50,510 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 439 transitions. [2022-01-31 23:42:50,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 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 23:42:50,510 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 439 transitions. [2022-01-31 23:42:50,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 23:42:50,511 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:50,511 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] [2022-01-31 23:42:50,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 23:42:50,512 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:50,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:50,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1957062113, now seen corresponding path program 1 times [2022-01-31 23:42:50,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:50,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [159972178] [2022-01-31 23:42:50,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:50,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:50,514 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:50,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:50,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:50,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:50,542 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 23:42:50,542 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:50,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [159972178] [2022-01-31 23:42:50,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [159972178] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:50,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:50,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:42:50,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003558498] [2022-01-31 23:42:50,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:50,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:42:50,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:50,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:42:50,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:42:50,544 INFO L87 Difference]: Start difference. First operand 255 states and 439 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 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 23:42:50,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:50,615 INFO L93 Difference]: Finished difference Result 385 states and 661 transitions. [2022-01-31 23:42:50,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:42:50,616 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 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 24 [2022-01-31 23:42:50,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:50,620 INFO L225 Difference]: With dead ends: 385 [2022-01-31 23:42:50,620 INFO L226 Difference]: Without dead ends: 263 [2022-01-31 23:42:50,621 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 23:42:50,622 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 129 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:50,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 107 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 23:42:50,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-01-31 23:42:50,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 261. [2022-01-31 23:42:50,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 257 states have (on average 1.7120622568093384) internal successors, (440), 257 states have internal predecessors, (440), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:42:50,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 443 transitions. [2022-01-31 23:42:50,637 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 443 transitions. Word has length 24 [2022-01-31 23:42:50,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:50,637 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 443 transitions. [2022-01-31 23:42:50,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 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 23:42:50,637 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 443 transitions. [2022-01-31 23:42:50,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 23:42:50,639 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:50,639 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] [2022-01-31 23:42:50,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 23:42:50,639 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:50,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:50,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1326787933, now seen corresponding path program 1 times [2022-01-31 23:42:50,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:50,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [582978609] [2022-01-31 23:42:50,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:50,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:50,641 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:50,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:50,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:50,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:50,687 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 23:42:50,688 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:50,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [582978609] [2022-01-31 23:42:50,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [582978609] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:50,688 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:50,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:42:50,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65777054] [2022-01-31 23:42:50,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:50,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:42:50,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:50,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:42:50,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:42:50,689 INFO L87 Difference]: Start difference. First operand 261 states and 443 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 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 23:42:50,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:50,764 INFO L93 Difference]: Finished difference Result 477 states and 821 transitions. [2022-01-31 23:42:50,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:42:50,764 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 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 24 [2022-01-31 23:42:50,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:50,766 INFO L225 Difference]: With dead ends: 477 [2022-01-31 23:42:50,766 INFO L226 Difference]: Without dead ends: 475 [2022-01-31 23:42:50,766 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 23:42:50,767 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 147 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:50,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 75 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 23:42:50,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-01-31 23:42:50,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 361. [2022-01-31 23:42:50,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 357 states have (on average 1.680672268907563) internal successors, (600), 357 states have internal predecessors, (600), 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 23:42:50,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 603 transitions. [2022-01-31 23:42:50,789 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 603 transitions. Word has length 24 [2022-01-31 23:42:50,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:50,789 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 603 transitions. [2022-01-31 23:42:50,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 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 23:42:50,790 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 603 transitions. [2022-01-31 23:42:50,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 23:42:50,790 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:50,790 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] [2022-01-31 23:42:50,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 23:42:50,790 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:50,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:50,791 INFO L85 PathProgramCache]: Analyzing trace with hash 739981919, now seen corresponding path program 1 times [2022-01-31 23:42:50,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:50,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1482660724] [2022-01-31 23:42:50,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:50,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:50,792 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:50,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:50,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:50,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:50,825 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 23:42:50,825 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:50,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1482660724] [2022-01-31 23:42:50,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1482660724] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:50,826 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:50,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:42:50,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022375117] [2022-01-31 23:42:50,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:50,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:42:50,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:50,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:42:50,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:42:50,827 INFO L87 Difference]: Start difference. First operand 361 states and 603 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 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 23:42:50,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:50,907 INFO L93 Difference]: Finished difference Result 845 states and 1421 transitions. [2022-01-31 23:42:50,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:42:50,907 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 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 24 [2022-01-31 23:42:50,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:50,909 INFO L225 Difference]: With dead ends: 845 [2022-01-31 23:42:50,909 INFO L226 Difference]: Without dead ends: 499 [2022-01-31 23:42:50,909 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 23:42:50,910 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 130 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:50,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 101 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 23:42:50,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-01-31 23:42:50,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 497. [2022-01-31 23:42:50,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 493 states have (on average 1.6632860040567952) internal successors, (820), 493 states have internal predecessors, (820), 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 23:42:50,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 823 transitions. [2022-01-31 23:42:50,955 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 823 transitions. Word has length 24 [2022-01-31 23:42:50,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:50,955 INFO L470 AbstractCegarLoop]: Abstraction has 497 states and 823 transitions. [2022-01-31 23:42:50,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 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 23:42:50,955 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 823 transitions. [2022-01-31 23:42:50,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 23:42:50,955 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:50,956 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 23:42:50,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 23:42:50,956 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:50,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:50,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1819032631, now seen corresponding path program 1 times [2022-01-31 23:42:50,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:50,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1028109246] [2022-01-31 23:42:50,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:50,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:50,957 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:50,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:50,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:50,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:50,979 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 23:42:50,979 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:50,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1028109246] [2022-01-31 23:42:50,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1028109246] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:50,979 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:50,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:42:50,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554404279] [2022-01-31 23:42:50,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:50,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:42:50,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:50,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:42:50,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:42:50,980 INFO L87 Difference]: Start difference. First operand 497 states and 823 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 23:42:51,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:51,068 INFO L93 Difference]: Finished difference Result 745 states and 1229 transitions. [2022-01-31 23:42:51,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:42:51,083 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 23:42:51,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:51,085 INFO L225 Difference]: With dead ends: 745 [2022-01-31 23:42:51,085 INFO L226 Difference]: Without dead ends: 507 [2022-01-31 23:42:51,086 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 23:42:51,086 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 128 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:51,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 104 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:42:51,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-01-31 23:42:51,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 505. [2022-01-31 23:42:51,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 501 states have (on average 1.6367265469061876) internal successors, (820), 501 states have internal predecessors, (820), 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 23:42:51,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 823 transitions. [2022-01-31 23:42:51,138 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 823 transitions. Word has length 25 [2022-01-31 23:42:51,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:51,138 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 823 transitions. [2022-01-31 23:42:51,138 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 23:42:51,138 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 823 transitions. [2022-01-31 23:42:51,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 23:42:51,139 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:51,140 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 23:42:51,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 23:42:51,140 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:51,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:51,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1464817415, now seen corresponding path program 1 times [2022-01-31 23:42:51,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:51,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1553151669] [2022-01-31 23:42:51,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:51,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:51,148 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:51,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:51,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:51,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:51,183 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 23:42:51,183 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:51,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1553151669] [2022-01-31 23:42:51,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1553151669] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:51,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:51,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:42:51,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826055088] [2022-01-31 23:42:51,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:51,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:42:51,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:51,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:42:51,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:42:51,185 INFO L87 Difference]: Start difference. First operand 505 states and 823 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 23:42:51,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:51,324 INFO L93 Difference]: Finished difference Result 909 states and 1505 transitions. [2022-01-31 23:42:51,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:42:51,324 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 23:42:51,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:51,327 INFO L225 Difference]: With dead ends: 909 [2022-01-31 23:42:51,327 INFO L226 Difference]: Without dead ends: 907 [2022-01-31 23:42:51,327 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 23:42:51,327 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 140 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:51,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 74 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:42:51,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2022-01-31 23:42:51,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 713. [2022-01-31 23:42:51,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 709 states have (on average 1.5966149506346967) internal successors, (1132), 709 states have internal predecessors, (1132), 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 23:42:51,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1135 transitions. [2022-01-31 23:42:51,419 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1135 transitions. Word has length 25 [2022-01-31 23:42:51,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:51,419 INFO L470 AbstractCegarLoop]: Abstraction has 713 states and 1135 transitions. [2022-01-31 23:42:51,419 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 23:42:51,419 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1135 transitions. [2022-01-31 23:42:51,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 23:42:51,420 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:51,420 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 23:42:51,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 23:42:51,420 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:51,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:51,421 INFO L85 PathProgramCache]: Analyzing trace with hash 878011401, now seen corresponding path program 1 times [2022-01-31 23:42:51,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:51,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [243342531] [2022-01-31 23:42:51,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:51,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:51,422 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:51,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:51,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:51,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:51,452 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 23:42:51,452 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:51,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [243342531] [2022-01-31 23:42:51,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [243342531] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:51,453 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:51,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:42:51,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411149778] [2022-01-31 23:42:51,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:51,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:42:51,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:51,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:42:51,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:42:51,454 INFO L87 Difference]: Start difference. First operand 713 states and 1135 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 23:42:51,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:51,623 INFO L93 Difference]: Finished difference Result 1661 states and 2657 transitions. [2022-01-31 23:42:51,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:42:51,623 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 23:42:51,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:51,627 INFO L225 Difference]: With dead ends: 1661 [2022-01-31 23:42:51,627 INFO L226 Difference]: Without dead ends: 971 [2022-01-31 23:42:51,628 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 23:42:51,628 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 124 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:51,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 103 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:42:51,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2022-01-31 23:42:51,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 969. [2022-01-31 23:42:51,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 965 states have (on average 1.5792746113989637) internal successors, (1524), 965 states have internal predecessors, (1524), 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 23:42:51,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 1527 transitions. [2022-01-31 23:42:51,765 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 1527 transitions. Word has length 25 [2022-01-31 23:42:51,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:51,765 INFO L470 AbstractCegarLoop]: Abstraction has 969 states and 1527 transitions. [2022-01-31 23:42:51,765 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 23:42:51,765 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 1527 transitions. [2022-01-31 23:42:51,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 23:42:51,766 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:51,766 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 23:42:51,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 23:42:51,766 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:51,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:51,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1835085644, now seen corresponding path program 1 times [2022-01-31 23:42:51,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:51,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1620644548] [2022-01-31 23:42:51,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:51,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:51,768 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:51,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:51,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:51,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:51,828 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 23:42:51,828 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:51,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1620644548] [2022-01-31 23:42:51,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1620644548] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:51,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:51,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:42:51,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185956504] [2022-01-31 23:42:51,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:51,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:42:51,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:51,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:42:51,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:42:51,829 INFO L87 Difference]: Start difference. First operand 969 states and 1527 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 23:42:51,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:51,992 INFO L93 Difference]: Finished difference Result 1453 states and 2281 transitions. [2022-01-31 23:42:51,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:42:51,992 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 23:42:51,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:51,995 INFO L225 Difference]: With dead ends: 1453 [2022-01-31 23:42:51,995 INFO L226 Difference]: Without dead ends: 987 [2022-01-31 23:42:51,996 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 23:42:51,996 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 127 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:51,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 101 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:42:52,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2022-01-31 23:42:52,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 985. [2022-01-31 23:42:52,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 981 states have (on average 1.5535168195718654) internal successors, (1524), 981 states have internal predecessors, (1524), 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 23:42:52,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1527 transitions. [2022-01-31 23:42:52,126 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1527 transitions. Word has length 26 [2022-01-31 23:42:52,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:52,127 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 1527 transitions. [2022-01-31 23:42:52,127 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 23:42:52,127 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1527 transitions. [2022-01-31 23:42:52,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 23:42:52,129 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:52,129 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 23:42:52,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 23:42:52,139 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:52,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:52,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1448764402, now seen corresponding path program 1 times [2022-01-31 23:42:52,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:52,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611515045] [2022-01-31 23:42:52,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:52,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:52,141 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:52,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:52,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:52,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:52,176 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 23:42:52,176 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:52,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611515045] [2022-01-31 23:42:52,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1611515045] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:52,177 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:52,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:42:52,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750866160] [2022-01-31 23:42:52,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:52,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:42:52,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:52,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:42:52,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:42:52,177 INFO L87 Difference]: Start difference. First operand 985 states and 1527 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 23:42:52,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:52,421 INFO L93 Difference]: Finished difference Result 1741 states and 2745 transitions. [2022-01-31 23:42:52,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:42:52,429 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 23:42:52,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:52,434 INFO L225 Difference]: With dead ends: 1741 [2022-01-31 23:42:52,434 INFO L226 Difference]: Without dead ends: 1739 [2022-01-31 23:42:52,435 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 23:42:52,435 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 133 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:52,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 73 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:42:52,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1739 states. [2022-01-31 23:42:52,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1739 to 1417. [2022-01-31 23:42:52,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1417 states, 1413 states have (on average 1.5088464260438783) internal successors, (2132), 1413 states have internal predecessors, (2132), 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 23:42:52,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1417 states to 1417 states and 2135 transitions. [2022-01-31 23:42:52,553 INFO L78 Accepts]: Start accepts. Automaton has 1417 states and 2135 transitions. Word has length 26 [2022-01-31 23:42:52,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:52,554 INFO L470 AbstractCegarLoop]: Abstraction has 1417 states and 2135 transitions. [2022-01-31 23:42:52,554 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 23:42:52,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1417 states and 2135 transitions. [2022-01-31 23:42:52,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 23:42:52,556 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:52,556 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 23:42:52,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 23:42:52,557 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:52,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:52,558 INFO L85 PathProgramCache]: Analyzing trace with hash 861958388, now seen corresponding path program 1 times [2022-01-31 23:42:52,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:52,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [894998561] [2022-01-31 23:42:52,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:52,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:52,559 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:52,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:52,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:52,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:52,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:42:52,603 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:52,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [894998561] [2022-01-31 23:42:52,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [894998561] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:52,603 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:52,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:42:52,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647319164] [2022-01-31 23:42:52,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:52,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:42:52,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:52,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:42:52,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:42:52,604 INFO L87 Difference]: Start difference. First operand 1417 states and 2135 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 23:42:52,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:52,872 INFO L93 Difference]: Finished difference Result 3277 states and 4953 transitions. [2022-01-31 23:42:52,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:42:52,887 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 23:42:52,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:52,893 INFO L225 Difference]: With dead ends: 3277 [2022-01-31 23:42:52,893 INFO L226 Difference]: Without dead ends: 1899 [2022-01-31 23:42:52,912 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 23:42:52,912 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 118 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:52,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 105 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:42:52,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2022-01-31 23:42:53,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1897. [2022-01-31 23:42:53,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1897 states, 1893 states have (on average 1.4896988906497624) internal successors, (2820), 1893 states have internal predecessors, (2820), 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 23:42:53,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1897 states to 1897 states and 2823 transitions. [2022-01-31 23:42:53,135 INFO L78 Accepts]: Start accepts. Automaton has 1897 states and 2823 transitions. Word has length 26 [2022-01-31 23:42:53,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:53,135 INFO L470 AbstractCegarLoop]: Abstraction has 1897 states and 2823 transitions. [2022-01-31 23:42:53,135 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 23:42:53,135 INFO L276 IsEmpty]: Start isEmpty. Operand 1897 states and 2823 transitions. [2022-01-31 23:42:53,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 23:42:53,136 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:53,136 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 23:42:53,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 23:42:53,137 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:53,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:53,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1962238590, now seen corresponding path program 1 times [2022-01-31 23:42:53,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:53,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [47878119] [2022-01-31 23:42:53,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:53,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:53,138 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:53,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:53,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:53,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:53,154 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 23:42:53,154 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:53,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [47878119] [2022-01-31 23:42:53,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [47878119] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:53,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:53,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:42:53,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811034816] [2022-01-31 23:42:53,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:53,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:42:53,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:53,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:42:53,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:42:53,155 INFO L87 Difference]: Start difference. First operand 1897 states and 2823 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 23:42:53,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:53,433 INFO L93 Difference]: Finished difference Result 2845 states and 4217 transitions. [2022-01-31 23:42:53,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:42:53,447 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 23:42:53,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:53,453 INFO L225 Difference]: With dead ends: 2845 [2022-01-31 23:42:53,453 INFO L226 Difference]: Without dead ends: 1931 [2022-01-31 23:42:53,455 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 23:42:53,456 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 126 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:53,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 98 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:42:53,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1931 states. [2022-01-31 23:42:53,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1931 to 1929. [2022-01-31 23:42:53,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1929 states, 1925 states have (on average 1.464935064935065) internal successors, (2820), 1925 states have internal predecessors, (2820), 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 23:42:53,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1929 states to 1929 states and 2823 transitions. [2022-01-31 23:42:53,593 INFO L78 Accepts]: Start accepts. Automaton has 1929 states and 2823 transitions. Word has length 27 [2022-01-31 23:42:53,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:53,593 INFO L470 AbstractCegarLoop]: Abstraction has 1929 states and 2823 transitions. [2022-01-31 23:42:53,593 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 23:42:53,593 INFO L276 IsEmpty]: Start isEmpty. Operand 1929 states and 2823 transitions. [2022-01-31 23:42:53,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 23:42:53,595 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:53,595 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 23:42:53,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 23:42:53,595 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:53,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:53,595 INFO L85 PathProgramCache]: Analyzing trace with hash 951121340, now seen corresponding path program 1 times [2022-01-31 23:42:53,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:53,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [345626557] [2022-01-31 23:42:53,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:53,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:53,596 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:53,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:53,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:53,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:53,612 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 23:42:53,612 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:53,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [345626557] [2022-01-31 23:42:53,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [345626557] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:53,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:53,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:42:53,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761894221] [2022-01-31 23:42:53,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:53,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:42:53,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:53,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:42:53,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:42:53,613 INFO L87 Difference]: Start difference. First operand 1929 states and 2823 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 23:42:53,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:53,870 INFO L93 Difference]: Finished difference Result 3341 states and 4969 transitions. [2022-01-31 23:42:53,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:42:53,871 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 23:42:53,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:53,879 INFO L225 Difference]: With dead ends: 3341 [2022-01-31 23:42:53,879 INFO L226 Difference]: Without dead ends: 3339 [2022-01-31 23:42:53,880 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 23:42:53,880 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 126 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:53,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 72 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 23:42:53,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3339 states. [2022-01-31 23:42:54,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3339 to 2825. [2022-01-31 23:42:54,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2825 states, 2821 states have (on average 1.4193548387096775) internal successors, (4004), 2821 states have internal predecessors, (4004), 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 23:42:54,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2825 states to 2825 states and 4007 transitions. [2022-01-31 23:42:54,078 INFO L78 Accepts]: Start accepts. Automaton has 2825 states and 4007 transitions. Word has length 27 [2022-01-31 23:42:54,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:54,079 INFO L470 AbstractCegarLoop]: Abstraction has 2825 states and 4007 transitions. [2022-01-31 23:42:54,079 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 23:42:54,079 INFO L276 IsEmpty]: Start isEmpty. Operand 2825 states and 4007 transitions. [2022-01-31 23:42:54,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 23:42:54,081 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:54,081 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 23:42:54,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 23:42:54,081 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:54,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:54,082 INFO L85 PathProgramCache]: Analyzing trace with hash 364315326, now seen corresponding path program 1 times [2022-01-31 23:42:54,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:54,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [582844915] [2022-01-31 23:42:54,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:54,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:54,083 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:54,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:54,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:54,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:54,097 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 23:42:54,097 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:54,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [582844915] [2022-01-31 23:42:54,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [582844915] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:54,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:54,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:42:54,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691430081] [2022-01-31 23:42:54,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:54,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:42:54,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:54,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:42:54,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:42:54,098 INFO L87 Difference]: Start difference. First operand 2825 states and 4007 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 23:42:54,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:54,390 INFO L93 Difference]: Finished difference Result 6477 states and 9193 transitions. [2022-01-31 23:42:54,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:42:54,391 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 23:42:54,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:54,401 INFO L225 Difference]: With dead ends: 6477 [2022-01-31 23:42:54,402 INFO L226 Difference]: Without dead ends: 3723 [2022-01-31 23:42:54,424 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 23:42:54,425 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 112 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:54,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 107 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 23:42:54,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3723 states. [2022-01-31 23:42:54,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3723 to 3721. [2022-01-31 23:42:54,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3721 states, 3717 states have (on average 1.3957492601560397) internal successors, (5188), 3717 states have internal predecessors, (5188), 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 23:42:54,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3721 states to 3721 states and 5191 transitions. [2022-01-31 23:42:54,812 INFO L78 Accepts]: Start accepts. Automaton has 3721 states and 5191 transitions. Word has length 27 [2022-01-31 23:42:54,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:54,812 INFO L470 AbstractCegarLoop]: Abstraction has 3721 states and 5191 transitions. [2022-01-31 23:42:54,812 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 23:42:54,812 INFO L276 IsEmpty]: Start isEmpty. Operand 3721 states and 5191 transitions. [2022-01-31 23:42:54,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 23:42:54,816 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:54,816 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 23:42:54,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 23:42:54,816 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:54,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:54,817 INFO L85 PathProgramCache]: Analyzing trace with hash -579794103, now seen corresponding path program 1 times [2022-01-31 23:42:54,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:54,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [414609425] [2022-01-31 23:42:54,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:54,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:54,818 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:54,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:54,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:54,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:54,850 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 23:42:54,850 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:54,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [414609425] [2022-01-31 23:42:54,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [414609425] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:54,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:54,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:42:54,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548265875] [2022-01-31 23:42:54,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:54,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:42:54,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:54,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:42:54,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:42:54,852 INFO L87 Difference]: Start difference. First operand 3721 states and 5191 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 23:42:55,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:55,166 INFO L93 Difference]: Finished difference Result 5581 states and 7753 transitions. [2022-01-31 23:42:55,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:42:55,166 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 23:42:55,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:55,175 INFO L225 Difference]: With dead ends: 5581 [2022-01-31 23:42:55,175 INFO L226 Difference]: Without dead ends: 3787 [2022-01-31 23:42:55,177 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 23:42:55,178 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 125 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:55,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 95 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 23:42:55,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3787 states. [2022-01-31 23:42:55,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3787 to 3785. [2022-01-31 23:42:55,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3785 states, 3781 states have (on average 1.37212377677863) internal successors, (5188), 3781 states have internal predecessors, (5188), 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 23:42:55,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3785 states to 3785 states and 5191 transitions. [2022-01-31 23:42:55,410 INFO L78 Accepts]: Start accepts. Automaton has 3785 states and 5191 transitions. Word has length 28 [2022-01-31 23:42:55,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:55,410 INFO L470 AbstractCegarLoop]: Abstraction has 3785 states and 5191 transitions. [2022-01-31 23:42:55,410 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 23:42:55,410 INFO L276 IsEmpty]: Start isEmpty. Operand 3785 states and 5191 transitions. [2022-01-31 23:42:55,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 23:42:55,413 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:55,413 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 23:42:55,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 23:42:55,413 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:55,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:55,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1590911353, now seen corresponding path program 1 times [2022-01-31 23:42:55,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:55,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487809605] [2022-01-31 23:42:55,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:55,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:55,414 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:55,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:55,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:55,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:55,428 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 23:42:55,429 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:55,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487809605] [2022-01-31 23:42:55,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1487809605] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:55,429 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:55,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:42:55,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480170357] [2022-01-31 23:42:55,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:55,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:42:55,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:55,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:42:55,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:42:55,429 INFO L87 Difference]: Start difference. First operand 3785 states and 5191 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 23:42:55,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:55,893 INFO L93 Difference]: Finished difference Result 6413 states and 8905 transitions. [2022-01-31 23:42:55,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:42:55,893 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 23:42:55,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:55,907 INFO L225 Difference]: With dead ends: 6413 [2022-01-31 23:42:55,908 INFO L226 Difference]: Without dead ends: 6411 [2022-01-31 23:42:55,909 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 23:42:55,909 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 119 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:55,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 71 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 23:42:55,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6411 states. [2022-01-31 23:42:56,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6411 to 5641. [2022-01-31 23:42:56,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5641 states, 5637 states have (on average 1.329075749512152) internal successors, (7492), 5637 states have internal predecessors, (7492), 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 23:42:56,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5641 states to 5641 states and 7495 transitions. [2022-01-31 23:42:56,312 INFO L78 Accepts]: Start accepts. Automaton has 5641 states and 7495 transitions. Word has length 28 [2022-01-31 23:42:56,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:56,313 INFO L470 AbstractCegarLoop]: Abstraction has 5641 states and 7495 transitions. [2022-01-31 23:42:56,313 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 23:42:56,313 INFO L276 IsEmpty]: Start isEmpty. Operand 5641 states and 7495 transitions. [2022-01-31 23:42:56,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 23:42:56,318 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:56,318 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 23:42:56,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 23:42:56,319 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:56,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:56,319 INFO L85 PathProgramCache]: Analyzing trace with hash 2117249929, now seen corresponding path program 1 times [2022-01-31 23:42:56,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:56,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1145553645] [2022-01-31 23:42:56,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:56,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:56,320 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:56,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:56,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:56,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:56,336 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 23:42:56,336 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:56,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1145553645] [2022-01-31 23:42:56,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1145553645] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:56,336 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:56,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:42:56,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230983603] [2022-01-31 23:42:56,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:56,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:42:56,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:56,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:42:56,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:42:56,337 INFO L87 Difference]: Start difference. First operand 5641 states and 7495 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 23:42:56,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:56,986 INFO L93 Difference]: Finished difference Result 12813 states and 16969 transitions. [2022-01-31 23:42:56,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:42:56,986 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 23:42:56,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:56,997 INFO L225 Difference]: With dead ends: 12813 [2022-01-31 23:42:56,997 INFO L226 Difference]: Without dead ends: 7307 [2022-01-31 23:42:57,005 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 23:42:57,006 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 106 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:57,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 109 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 23:42:57,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7307 states. [2022-01-31 23:42:57,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7307 to 7305. [2022-01-31 23:42:57,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7305 states, 7301 states have (on average 1.297904396657992) internal successors, (9476), 7301 states have internal predecessors, (9476), 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 23:42:57,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7305 states to 7305 states and 9479 transitions. [2022-01-31 23:42:57,516 INFO L78 Accepts]: Start accepts. Automaton has 7305 states and 9479 transitions. Word has length 28 [2022-01-31 23:42:57,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:57,516 INFO L470 AbstractCegarLoop]: Abstraction has 7305 states and 9479 transitions. [2022-01-31 23:42:57,516 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 23:42:57,516 INFO L276 IsEmpty]: Start isEmpty. Operand 7305 states and 9479 transitions. [2022-01-31 23:42:57,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 23:42:57,524 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:57,524 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 23:42:57,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 23:42:57,524 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:57,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:57,524 INFO L85 PathProgramCache]: Analyzing trace with hash -2073395917, now seen corresponding path program 1 times [2022-01-31 23:42:57,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:57,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2060845710] [2022-01-31 23:42:57,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:57,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:57,525 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:57,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:57,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:57,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:57,540 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 23:42:57,540 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:57,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2060845710] [2022-01-31 23:42:57,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2060845710] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:57,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:57,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:42:57,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636654455] [2022-01-31 23:42:57,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:57,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:42:57,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:57,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:42:57,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:42:57,541 INFO L87 Difference]: Start difference. First operand 7305 states and 9479 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 23:42:58,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:58,075 INFO L93 Difference]: Finished difference Result 10957 states and 14153 transitions. [2022-01-31 23:42:58,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:42:58,076 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 23:42:58,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:58,086 INFO L225 Difference]: With dead ends: 10957 [2022-01-31 23:42:58,086 INFO L226 Difference]: Without dead ends: 7435 [2022-01-31 23:42:58,091 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 23:42:58,091 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 124 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:58,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 92 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 23:42:58,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7435 states. [2022-01-31 23:42:58,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7435 to 7433. [2022-01-31 23:42:58,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7433 states, 7429 states have (on average 1.2755417956656347) internal successors, (9476), 7429 states have internal predecessors, (9476), 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 23:42:58,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7433 states to 7433 states and 9479 transitions. [2022-01-31 23:42:58,604 INFO L78 Accepts]: Start accepts. Automaton has 7433 states and 9479 transitions. Word has length 29 [2022-01-31 23:42:58,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:58,605 INFO L470 AbstractCegarLoop]: Abstraction has 7433 states and 9479 transitions. [2022-01-31 23:42:58,605 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 23:42:58,605 INFO L276 IsEmpty]: Start isEmpty. Operand 7433 states and 9479 transitions. [2022-01-31 23:42:58,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 23:42:58,609 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:58,610 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 23:42:58,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 23:42:58,610 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:58,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:58,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1210454129, now seen corresponding path program 1 times [2022-01-31 23:42:58,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:58,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1280488997] [2022-01-31 23:42:58,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:58,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:58,611 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:58,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:58,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:58,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:58,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:42:58,629 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:58,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1280488997] [2022-01-31 23:42:58,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1280488997] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:58,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:58,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:42:58,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388361802] [2022-01-31 23:42:58,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:58,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:42:58,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:58,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:42:58,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:42:58,630 INFO L87 Difference]: Start difference. First operand 7433 states and 9479 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 23:42:59,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:59,627 INFO L93 Difference]: Finished difference Result 12301 states and 15753 transitions. [2022-01-31 23:42:59,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:42:59,627 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 23:42:59,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:59,649 INFO L225 Difference]: With dead ends: 12301 [2022-01-31 23:42:59,650 INFO L226 Difference]: Without dead ends: 12299 [2022-01-31 23:42:59,653 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 23:42:59,654 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 112 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:59,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 70 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 23:42:59,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12299 states. [2022-01-31 23:43:00,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12299 to 11273. [2022-01-31 23:43:00,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11273 states, 11269 states have (on average 1.2384417428343242) internal successors, (13956), 11269 states have internal predecessors, (13956), 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 23:43:00,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11273 states to 11273 states and 13959 transitions. [2022-01-31 23:43:00,621 INFO L78 Accepts]: Start accepts. Automaton has 11273 states and 13959 transitions. Word has length 29 [2022-01-31 23:43:00,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:00,621 INFO L470 AbstractCegarLoop]: Abstraction has 11273 states and 13959 transitions. [2022-01-31 23:43:00,621 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 23:43:00,621 INFO L276 IsEmpty]: Start isEmpty. Operand 11273 states and 13959 transitions. [2022-01-31 23:43:00,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 23:43:00,630 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:00,630 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 23:43:00,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 23:43:00,631 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:00,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:00,631 INFO L85 PathProgramCache]: Analyzing trace with hash 623648115, now seen corresponding path program 1 times [2022-01-31 23:43:00,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:00,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [464696405] [2022-01-31 23:43:00,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:00,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:00,632 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:00,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:00,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:00,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:00,647 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 23:43:00,648 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:00,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [464696405] [2022-01-31 23:43:00,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [464696405] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:00,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:00,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:43:00,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607973412] [2022-01-31 23:43:00,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:00,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:43:00,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:00,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:43:00,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:43:00,649 INFO L87 Difference]: Start difference. First operand 11273 states and 13959 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 23:43:01,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:01,721 INFO L93 Difference]: Finished difference Result 25357 states and 31113 transitions. [2022-01-31 23:43:01,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:43:01,722 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 23:43:01,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:01,744 INFO L225 Difference]: With dead ends: 25357 [2022-01-31 23:43:01,744 INFO L226 Difference]: Without dead ends: 14347 [2022-01-31 23:43:01,762 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 23:43:01,762 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 100 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:43:01,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 111 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 23:43:01,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14347 states. [2022-01-31 23:43:02,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14347 to 14345. [2022-01-31 23:43:02,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14345 states, 14341 states have (on average 1.1962903563210376) internal successors, (17156), 14341 states have internal predecessors, (17156), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:43:02,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14345 states to 14345 states and 17159 transitions. [2022-01-31 23:43:02,796 INFO L78 Accepts]: Start accepts. Automaton has 14345 states and 17159 transitions. Word has length 29 [2022-01-31 23:43:02,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:02,796 INFO L470 AbstractCegarLoop]: Abstraction has 14345 states and 17159 transitions. [2022-01-31 23:43:02,796 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 23:43:02,796 INFO L276 IsEmpty]: Start isEmpty. Operand 14345 states and 17159 transitions. [2022-01-31 23:43:02,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 23:43:02,807 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:02,807 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 23:43:02,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 23:43:02,807 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:02,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:02,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1130411554, now seen corresponding path program 1 times [2022-01-31 23:43:02,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:02,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [546102321] [2022-01-31 23:43:02,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:02,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:02,810 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:02,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:02,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:02,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:02,838 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 23:43:02,838 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:02,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [546102321] [2022-01-31 23:43:02,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [546102321] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:02,838 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:02,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:43:02,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753386029] [2022-01-31 23:43:02,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:02,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:43:02,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:02,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:43:02,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:43:02,839 INFO L87 Difference]: Start difference. First operand 14345 states and 17159 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 23:43:03,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:03,921 INFO L93 Difference]: Finished difference Result 21517 states and 25609 transitions. [2022-01-31 23:43:03,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:43:03,922 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 23:43:03,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:03,946 INFO L225 Difference]: With dead ends: 21517 [2022-01-31 23:43:03,946 INFO L226 Difference]: Without dead ends: 14603 [2022-01-31 23:43:03,971 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 23:43:03,972 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 123 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:43:03,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 89 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 23:43:03,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14603 states. [2022-01-31 23:43:05,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14603 to 14601. [2022-01-31 23:43:05,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14601 states, 14597 states have (on average 1.175309995204494) internal successors, (17156), 14597 states have internal predecessors, (17156), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:43:05,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14601 states to 14601 states and 17159 transitions. [2022-01-31 23:43:05,310 INFO L78 Accepts]: Start accepts. Automaton has 14601 states and 17159 transitions. Word has length 30 [2022-01-31 23:43:05,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:05,310 INFO L470 AbstractCegarLoop]: Abstraction has 14601 states and 17159 transitions. [2022-01-31 23:43:05,310 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 23:43:05,310 INFO L276 IsEmpty]: Start isEmpty. Operand 14601 states and 17159 transitions. [2022-01-31 23:43:05,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 23:43:05,322 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:05,322 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 23:43:05,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 23:43:05,322 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:05,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:05,322 INFO L85 PathProgramCache]: Analyzing trace with hash -2141528804, now seen corresponding path program 1 times [2022-01-31 23:43:05,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:05,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710570159] [2022-01-31 23:43:05,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:05,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:05,324 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:05,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:05,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:05,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:05,337 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 23:43:05,338 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:05,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1710570159] [2022-01-31 23:43:05,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1710570159] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:05,338 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:05,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:43:05,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421362723] [2022-01-31 23:43:05,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:05,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:43:05,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:05,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:43:05,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:43:05,338 INFO L87 Difference]: Start difference. First operand 14601 states and 17159 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 23:43:07,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:07,419 INFO L93 Difference]: Finished difference Result 42251 states and 48392 transitions. [2022-01-31 23:43:07,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:43:07,419 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 23:43:07,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:07,436 INFO L225 Difference]: With dead ends: 42251 [2022-01-31 23:43:07,436 INFO L226 Difference]: Without dead ends: 14601 [2022-01-31 23:43:07,468 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 23:43:07,468 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 122 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:43:07,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 86 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 23:43:07,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14601 states. [2022-01-31 23:43:08,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14601 to 14601. [2022-01-31 23:43:08,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14601 states, 14597 states have (on average 1.1051585942316915) internal successors, (16132), 14597 states have internal predecessors, (16132), 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 23:43:08,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14601 states to 14601 states and 16135 transitions. [2022-01-31 23:43:08,510 INFO L78 Accepts]: Start accepts. Automaton has 14601 states and 16135 transitions. Word has length 30 [2022-01-31 23:43:08,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:08,510 INFO L470 AbstractCegarLoop]: Abstraction has 14601 states and 16135 transitions. [2022-01-31 23:43:08,511 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 23:43:08,511 INFO L276 IsEmpty]: Start isEmpty. Operand 14601 states and 16135 transitions. [2022-01-31 23:43:08,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 23:43:08,522 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:08,522 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] [2022-01-31 23:43:08,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 23:43:08,522 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:08,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:08,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1554722790, now seen corresponding path program 1 times [2022-01-31 23:43:08,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:08,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [157235220] [2022-01-31 23:43:08,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:08,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:08,523 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:08,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:08,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:08,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:08,539 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 23:43:08,539 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:08,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [157235220] [2022-01-31 23:43:08,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [157235220] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:08,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:08,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:43:08,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136941745] [2022-01-31 23:43:08,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:08,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:43:08,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:08,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:43:08,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:43:08,540 INFO L87 Difference]: Start difference. First operand 14601 states and 16135 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 23:43:09,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:09,596 INFO L93 Difference]: Finished difference Result 14601 states and 16135 transitions. [2022-01-31 23:43:09,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:43:09,597 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 23:43:09,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:09,597 INFO L225 Difference]: With dead ends: 14601 [2022-01-31 23:43:09,597 INFO L226 Difference]: Without dead ends: 0 [2022-01-31 23:43:09,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 23:43:09,616 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 68 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:43:09,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 62 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 23:43:09,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-01-31 23:43:09,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-01-31 23:43:09,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-31 23:43:09,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-01-31 23:43:09,617 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 30 [2022-01-31 23:43:09,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:09,617 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-01-31 23:43:09,617 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 23:43:09,617 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-01-31 23:43:09,617 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-01-31 23:43:09,619 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-31 23:43:09,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 23:43:09,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-01-31 23:43:38,763 WARN L228 SmtUtils]: Spent 29.09s on a formula simplification that was a NOOP. DAG size: 1333 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-01-31 23:44:38,390 WARN L228 SmtUtils]: Spent 59.62s on a formula simplification that was a NOOP. DAG size: 1174 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-01-31 23:46:37,946 WARN L228 SmtUtils]: Spent 1.99m on a formula simplification that was a NOOP. DAG size: 2614 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-01-31 23:46:44,813 WARN L228 SmtUtils]: Spent 6.86s on a formula simplification that was a NOOP. DAG size: 570 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-01-31 23:47:36,105 WARN L228 SmtUtils]: Spent 51.29s on a formula simplification that was a NOOP. DAG size: 1126 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-01-31 23:47:56,272 WARN L228 SmtUtils]: Spent 20.16s on a formula simplification that was a NOOP. DAG size: 1081 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-01-31 23:48:09,371 WARN L228 SmtUtils]: Spent 13.09s on a formula simplification that was a NOOP. DAG size: 1061 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-01-31 23:48:31,491 WARN L228 SmtUtils]: Spent 22.12s on a formula simplification that was a NOOP. DAG size: 950 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-01-31 23:50:28,431 WARN L228 SmtUtils]: Spent 1.95m on a formula simplification that was a NOOP. DAG size: 2613 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-01-31 23:50:41,874 WARN L228 SmtUtils]: Spent 13.44s on a formula simplification that was a NOOP. DAG size: 1065 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-01-31 23:50:57,823 WARN L228 SmtUtils]: Spent 15.94s on a formula simplification that was a NOOP. DAG size: 1085 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-01-31 23:51:16,808 WARN L228 SmtUtils]: Spent 18.98s on a formula simplification that was a NOOP. DAG size: 1079 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-01-31 23:51:29,670 WARN L228 SmtUtils]: Spent 12.86s on a formula simplification that was a NOOP. DAG size: 614 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-01-31 23:51:58,683 WARN L228 SmtUtils]: Spent 29.01s on a formula simplification that was a NOOP. DAG size: 1084 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-01-31 23:52:09,264 WARN L228 SmtUtils]: Spent 10.58s on a formula simplification that was a NOOP. DAG size: 590 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-01-31 23:52:24,978 WARN L228 SmtUtils]: Spent 15.71s on a formula simplification that was a NOOP. DAG size: 1075 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-01-31 23:52:33,243 WARN L228 SmtUtils]: Spent 8.26s on a formula simplification that was a NOOP. DAG size: 578 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-01-31 23:53:15,099 WARN L228 SmtUtils]: Spent 41.85s on a formula simplification that was a NOOP. DAG size: 1102 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-01-31 23:54:26,205 WARN L228 SmtUtils]: Spent 1.19m on a formula simplification that was a NOOP. DAG size: 1270 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-01-31 23:54:45,836 WARN L228 SmtUtils]: Spent 19.63s on a formula simplification that was a NOOP. DAG size: 1137 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-01-31 23:56:26,114 WARN L228 SmtUtils]: Spent 1.67m on a formula simplification that was a NOOP. DAG size: 1846 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-01-31 23:56:48,535 WARN L228 SmtUtils]: Spent 22.42s on a formula simplification that was a NOOP. DAG size: 1203 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-01-31 23:57:25,612 WARN L228 SmtUtils]: Spent 32.28s on a formula simplification that was a NOOP. DAG size: 1090 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)