/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/locks/test_locks_10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 08:37:14,922 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 08:37:14,924 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 08:37:14,985 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 08:37:15,022 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 08:37:15,023 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 08:37:15,024 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 08:37:15,025 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-04-06 08:37:15,032 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 08:37:15,032 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 08:37:15,033 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 08:37:15,033 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 08:37:15,033 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 08:37:15,033 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 08:37:15,033 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 08:37:15,033 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 08:37:15,034 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 08:37:15,034 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 08:37:15,034 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 08:37:15,034 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 08:37:15,034 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 08:37:15,034 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 08:37:15,035 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 08:37:15,035 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 08:37:15,035 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 08:37:15,035 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 08:37:15,035 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 08:37:15,035 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 08:37:15,035 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 08:37:15,035 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 08:37:15,036 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 08:37:15,224 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 08:37:15,242 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 08:37:15,243 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 08:37:15,244 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 08:37:15,244 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 08:37:15,245 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_10.c [2022-04-06 08:37:15,284 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6059a914/7fb963307c0d4254919e8a93c86e4ca7/FLAG805a18d58 [2022-04-06 08:37:15,623 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 08:37:15,623 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_10.c [2022-04-06 08:37:15,627 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6059a914/7fb963307c0d4254919e8a93c86e4ca7/FLAG805a18d58 [2022-04-06 08:37:16,071 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6059a914/7fb963307c0d4254919e8a93c86e4ca7 [2022-04-06 08:37:16,073 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 08:37:16,074 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 08:37:16,079 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 08:37:16,079 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 08:37:16,081 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 08:37:16,082 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:37:16" (1/1) ... [2022-04-06 08:37:16,083 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2878f728 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:37:16, skipping insertion in model container [2022-04-06 08:37:16,083 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:37:16" (1/1) ... [2022-04-06 08:37:16,087 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 08:37:16,108 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 08:37:16,274 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] [2022-04-06 08:37:16,276 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 08:37:16,282 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 08:37:16,313 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] [2022-04-06 08:37:16,314 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 08:37:16,324 INFO L208 MainTranslator]: Completed translation [2022-04-06 08:37:16,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:37:16 WrapperNode [2022-04-06 08:37:16,325 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 08:37:16,326 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 08:37:16,326 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 08:37:16,326 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 08:37:16,333 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:37:16" (1/1) ... [2022-04-06 08:37:16,333 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:37:16" (1/1) ... [2022-04-06 08:37:16,344 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:37:16" (1/1) ... [2022-04-06 08:37:16,345 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:37:16" (1/1) ... [2022-04-06 08:37:16,355 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:37:16" (1/1) ... [2022-04-06 08:37:16,359 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:37:16" (1/1) ... [2022-04-06 08:37:16,360 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:37:16" (1/1) ... [2022-04-06 08:37:16,361 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 08:37:16,362 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 08:37:16,362 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 08:37:16,362 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 08:37:16,367 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:37:16" (1/1) ... [2022-04-06 08:37:16,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 08:37:16,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:37:16,386 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 08:37:16,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 08:37:16,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 08:37:16,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 08:37:16,429 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 08:37:16,429 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 08:37:16,430 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 08:37:16,430 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 08:37:16,430 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 08:37:16,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 08:37:16,430 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 08:37:16,430 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 08:37:16,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 08:37:16,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 08:37:16,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 08:37:16,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 08:37:16,431 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 08:37:16,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 08:37:16,483 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 08:37:16,484 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 08:37:16,654 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 08:37:16,658 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 08:37:16,658 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 08:37:16,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:37:16 BoogieIcfgContainer [2022-04-06 08:37:16,659 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 08:37:16,659 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 08:37:16,659 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 08:37:16,660 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 08:37:16,662 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:37:16" (1/1) ... [2022-04-06 08:37:16,663 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-04-06 08:37:16,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 08:37:16 BasicIcfg [2022-04-06 08:37:16,684 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 08:37:16,685 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 08:37:16,685 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 08:37:16,702 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 08:37:16,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 08:37:16" (1/4) ... [2022-04-06 08:37:16,703 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d41e504 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:37:16, skipping insertion in model container [2022-04-06 08:37:16,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:37:16" (2/4) ... [2022-04-06 08:37:16,703 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d41e504 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:37:16, skipping insertion in model container [2022-04-06 08:37:16,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:37:16" (3/4) ... [2022-04-06 08:37:16,703 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d41e504 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 08:37:16, skipping insertion in model container [2022-04-06 08:37:16,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 08:37:16" (4/4) ... [2022-04-06 08:37:16,704 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_10.cJordan [2022-04-06 08:37:16,707 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-04-06 08:37:16,707 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 08:37:16,732 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 08:37:16,735 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, 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 [2022-04-06 08:37:16,736 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 08:37:16,743 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) [2022-04-06 08:37:16,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-06 08:37:16,748 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:37:16,748 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:37:16,748 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:37:16,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:37:16,751 INFO L85 PathProgramCache]: Analyzing trace with hash -666508425, now seen corresponding path program 1 times [2022-04-06 08:37:16,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:37:16,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855500237] [2022-04-06 08:37:16,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:37:16,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:37:16,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:37:16,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 08:37:16,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:37:16,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 08:37:16,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:37:16,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855500237] [2022-04-06 08:37:16,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855500237] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:37:16,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 08:37:16,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 08:37:16,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076696156] [2022-04-06 08:37:16,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:37:16,912 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 08:37:16,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:37:16,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 08:37:16,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 08:37:16,930 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) [2022-04-06 08:37:17,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:37:17,029 INFO L93 Difference]: Finished difference Result 81 states and 138 transitions. [2022-04-06 08:37:17,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 08:37:17,031 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 [2022-04-06 08:37:17,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:37:17,036 INFO L225 Difference]: With dead ends: 81 [2022-04-06 08:37:17,036 INFO L226 Difference]: Without dead ends: 73 [2022-04-06 08:37:17,037 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 08:37:17,039 INFO L913 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 [2022-04-06 08:37:17,040 INFO L914 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] [2022-04-06 08:37:17,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-04-06 08:37:17,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 51. [2022-04-06 08:37:17,061 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) [2022-04-06 08:37:17,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 90 transitions. [2022-04-06 08:37:17,062 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 90 transitions. Word has length 21 [2022-04-06 08:37:17,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:37:17,063 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 90 transitions. [2022-04-06 08:37:17,063 INFO L479 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) [2022-04-06 08:37:17,063 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 90 transitions. [2022-04-06 08:37:17,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-06 08:37:17,064 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:37:17,064 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:37:17,064 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 08:37:17,064 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:37:17,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:37:17,065 INFO L85 PathProgramCache]: Analyzing trace with hash -959911432, now seen corresponding path program 1 times [2022-04-06 08:37:17,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:37:17,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065572835] [2022-04-06 08:37:17,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:37:17,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:37:17,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:37:17,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 08:37:17,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:37:17,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 08:37:17,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:37:17,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065572835] [2022-04-06 08:37:17,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065572835] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:37:17,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 08:37:17,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 08:37:17,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516909524] [2022-04-06 08:37:17,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:37:17,112 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 08:37:17,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:37:17,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 08:37:17,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 08:37:17,113 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) [2022-04-06 08:37:17,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:37:17,231 INFO L93 Difference]: Finished difference Result 73 states and 127 transitions. [2022-04-06 08:37:17,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 08:37:17,231 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 [2022-04-06 08:37:17,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:37:17,232 INFO L225 Difference]: With dead ends: 73 [2022-04-06 08:37:17,232 INFO L226 Difference]: Without dead ends: 73 [2022-04-06 08:37:17,233 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 08:37:17,234 INFO L913 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 [2022-04-06 08:37:17,234 INFO L914 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] [2022-04-06 08:37:17,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-04-06 08:37:17,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2022-04-06 08:37:17,239 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) [2022-04-06 08:37:17,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 126 transitions. [2022-04-06 08:37:17,240 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 126 transitions. Word has length 21 [2022-04-06 08:37:17,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:37:17,240 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 126 transitions. [2022-04-06 08:37:17,241 INFO L479 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) [2022-04-06 08:37:17,241 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 126 transitions. [2022-04-06 08:37:17,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 08:37:17,241 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:37:17,241 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:37:17,242 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 08:37:17,242 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:37:17,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:37:17,242 INFO L85 PathProgramCache]: Analyzing trace with hash 813107322, now seen corresponding path program 1 times [2022-04-06 08:37:17,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:37:17,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277873251] [2022-04-06 08:37:17,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:37:17,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:37:17,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:37:17,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 08:37:17,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:37:17,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 08:37:17,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:37:17,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277873251] [2022-04-06 08:37:17,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277873251] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:37:17,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 08:37:17,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 08:37:17,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704549720] [2022-04-06 08:37:17,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:37:17,281 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 08:37:17,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:37:17,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 08:37:17,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 08:37:17,282 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) [2022-04-06 08:37:17,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:37:17,346 INFO L93 Difference]: Finished difference Result 76 states and 129 transitions. [2022-04-06 08:37:17,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 08:37:17,346 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 [2022-04-06 08:37:17,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:37:17,347 INFO L225 Difference]: With dead ends: 76 [2022-04-06 08:37:17,347 INFO L226 Difference]: Without dead ends: 76 [2022-04-06 08:37:17,348 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 08:37:17,349 INFO L913 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 [2022-04-06 08:37:17,349 INFO L914 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] [2022-04-06 08:37:17,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-04-06 08:37:17,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2022-04-06 08:37:17,353 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) [2022-04-06 08:37:17,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 128 transitions. [2022-04-06 08:37:17,354 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 128 transitions. Word has length 22 [2022-04-06 08:37:17,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:37:17,354 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 128 transitions. [2022-04-06 08:37:17,355 INFO L479 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) [2022-04-06 08:37:17,355 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 128 transitions. [2022-04-06 08:37:17,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 08:37:17,355 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:37:17,355 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:37:17,355 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-06 08:37:17,356 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:37:17,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:37:17,356 INFO L85 PathProgramCache]: Analyzing trace with hash 307548697, now seen corresponding path program 1 times [2022-04-06 08:37:17,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:37:17,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546739138] [2022-04-06 08:37:17,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:37:17,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:37:17,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:37:17,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 08:37:17,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:37:17,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 08:37:17,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:37:17,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546739138] [2022-04-06 08:37:17,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546739138] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:37:17,390 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 08:37:17,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 08:37:17,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099986567] [2022-04-06 08:37:17,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:37:17,391 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 08:37:17,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:37:17,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 08:37:17,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 08:37:17,391 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) [2022-04-06 08:37:17,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:37:17,454 INFO L93 Difference]: Finished difference Result 135 states and 238 transitions. [2022-04-06 08:37:17,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 08:37:17,454 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 [2022-04-06 08:37:17,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:37:17,455 INFO L225 Difference]: With dead ends: 135 [2022-04-06 08:37:17,455 INFO L226 Difference]: Without dead ends: 135 [2022-04-06 08:37:17,456 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 08:37:17,456 INFO L913 BasicCegarLoop]: 70 mSDtfsCounter, 161 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 08:37:17,457 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 77 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 08:37:17,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-04-06 08:37:17,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 97. [2022-04-06 08:37:17,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 93 states have (on average 1.7849462365591398) internal successors, (166), 93 states have internal predecessors, (166), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:37:17,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 169 transitions. [2022-04-06 08:37:17,463 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 169 transitions. Word has length 22 [2022-04-06 08:37:17,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:37:17,463 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 169 transitions. [2022-04-06 08:37:17,463 INFO L479 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) [2022-04-06 08:37:17,463 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 169 transitions. [2022-04-06 08:37:17,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 08:37:17,464 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:37:17,464 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:37:17,464 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-06 08:37:17,464 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:37:17,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:37:17,465 INFO L85 PathProgramCache]: Analyzing trace with hash 14145690, now seen corresponding path program 1 times [2022-04-06 08:37:17,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:37:17,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665393605] [2022-04-06 08:37:17,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:37:17,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:37:17,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:37:17,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 08:37:17,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:37:17,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 08:37:17,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:37:17,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665393605] [2022-04-06 08:37:17,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665393605] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:37:17,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 08:37:17,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 08:37:17,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428487909] [2022-04-06 08:37:17,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:37:17,497 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 08:37:17,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:37:17,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 08:37:17,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 08:37:17,498 INFO L87 Difference]: Start difference. First operand 97 states and 169 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) [2022-04-06 08:37:17,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:37:17,557 INFO L93 Difference]: Finished difference Result 137 states and 236 transitions. [2022-04-06 08:37:17,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 08:37:17,558 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 [2022-04-06 08:37:17,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:37:17,559 INFO L225 Difference]: With dead ends: 137 [2022-04-06 08:37:17,559 INFO L226 Difference]: Without dead ends: 137 [2022-04-06 08:37:17,559 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 08:37:17,560 INFO L913 BasicCegarLoop]: 90 mSDtfsCounter, 142 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 08:37:17,560 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 97 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 08:37:17,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-04-06 08:37:17,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2022-04-06 08:37:17,564 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) [2022-04-06 08:37:17,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 235 transitions. [2022-04-06 08:37:17,565 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 235 transitions. Word has length 22 [2022-04-06 08:37:17,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:37:17,566 INFO L478 AbstractCegarLoop]: Abstraction has 135 states and 235 transitions. [2022-04-06 08:37:17,566 INFO L479 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) [2022-04-06 08:37:17,566 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 235 transitions. [2022-04-06 08:37:17,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 08:37:17,566 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:37:17,567 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:37:17,567 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-04-06 08:37:17,567 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:37:17,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:37:17,567 INFO L85 PathProgramCache]: Analyzing trace with hash 944107156, now seen corresponding path program 1 times [2022-04-06 08:37:17,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:37:17,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788924070] [2022-04-06 08:37:17,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:37:17,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:37:17,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:37:17,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 08:37:17,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:37:17,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 08:37:17,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:37:17,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788924070] [2022-04-06 08:37:17,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788924070] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:37:17,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 08:37:17,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 08:37:17,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258858707] [2022-04-06 08:37:17,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:37:17,598 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 08:37:17,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:37:17,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 08:37:17,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 08:37:17,598 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) [2022-04-06 08:37:17,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:37:17,656 INFO L93 Difference]: Finished difference Result 139 states and 236 transitions. [2022-04-06 08:37:17,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 08:37:17,656 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 [2022-04-06 08:37:17,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:37:17,657 INFO L225 Difference]: With dead ends: 139 [2022-04-06 08:37:17,657 INFO L226 Difference]: Without dead ends: 139 [2022-04-06 08:37:17,657 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 08:37:17,658 INFO L913 BasicCegarLoop]: 103 mSDtfsCounter, 130 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 08:37:17,658 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 110 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 08:37:17,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-04-06 08:37:17,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2022-04-06 08:37:17,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 133 states have (on average 1.744360902255639) internal successors, (232), 133 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) [2022-04-06 08:37:17,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 235 transitions. [2022-04-06 08:37:17,663 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 235 transitions. Word has length 23 [2022-04-06 08:37:17,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:37:17,663 INFO L478 AbstractCegarLoop]: Abstraction has 137 states and 235 transitions. [2022-04-06 08:37:17,663 INFO L479 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) [2022-04-06 08:37:17,663 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 235 transitions. [2022-04-06 08:37:17,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 08:37:17,664 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:37:17,664 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:37:17,664 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-04-06 08:37:17,664 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:37:17,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:37:17,664 INFO L85 PathProgramCache]: Analyzing trace with hash 438548531, now seen corresponding path program 1 times [2022-04-06 08:37:17,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:37:17,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339980357] [2022-04-06 08:37:17,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:37:17,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:37:17,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:37:17,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 08:37:17,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:37:17,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 08:37:17,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:37:17,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339980357] [2022-04-06 08:37:17,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339980357] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:37:17,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 08:37:17,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 08:37:17,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24687599] [2022-04-06 08:37:17,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:37:17,693 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 08:37:17,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:37:17,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 08:37:17,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 08:37:17,694 INFO L87 Difference]: Start difference. First operand 137 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) [2022-04-06 08:37:17,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:37:17,750 INFO L93 Difference]: Finished difference Result 251 states and 436 transitions. [2022-04-06 08:37:17,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 08:37:17,751 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 [2022-04-06 08:37:17,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:37:17,752 INFO L225 Difference]: With dead ends: 251 [2022-04-06 08:37:17,752 INFO L226 Difference]: Without dead ends: 251 [2022-04-06 08:37:17,752 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 08:37:17,753 INFO L913 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, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 08:37:17,753 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 76 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 08:37:17,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-04-06 08:37:17,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 185. [2022-04-06 08:37:17,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 181 states have (on average 1.723756906077348) internal successors, (312), 181 states have internal predecessors, (312), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:37:17,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 315 transitions. [2022-04-06 08:37:17,758 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 315 transitions. Word has length 23 [2022-04-06 08:37:17,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:37:17,758 INFO L478 AbstractCegarLoop]: Abstraction has 185 states and 315 transitions. [2022-04-06 08:37:17,758 INFO L479 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) [2022-04-06 08:37:17,759 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 315 transitions. [2022-04-06 08:37:17,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 08:37:17,759 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:37:17,759 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:37:17,760 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-04-06 08:37:17,760 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:37:17,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:37:17,760 INFO L85 PathProgramCache]: Analyzing trace with hash 145145524, now seen corresponding path program 1 times [2022-04-06 08:37:17,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:37:17,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062000821] [2022-04-06 08:37:17,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:37:17,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:37:17,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:37:17,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 08:37:17,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:37:17,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 08:37:17,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:37:17,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062000821] [2022-04-06 08:37:17,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062000821] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:37:17,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 08:37:17,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 08:37:17,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068077537] [2022-04-06 08:37:17,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:37:17,787 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 08:37:17,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:37:17,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 08:37:17,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 08:37:17,788 INFO L87 Difference]: Start difference. First operand 185 states and 315 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) [2022-04-06 08:37:17,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:37:17,842 INFO L93 Difference]: Finished difference Result 259 states and 436 transitions. [2022-04-06 08:37:17,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 08:37:17,842 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 [2022-04-06 08:37:17,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:37:17,843 INFO L225 Difference]: With dead ends: 259 [2022-04-06 08:37:17,843 INFO L226 Difference]: Without dead ends: 259 [2022-04-06 08:37:17,844 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 08:37:17,844 INFO L913 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, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 08:37:17,845 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 99 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 08:37:17,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-04-06 08:37:17,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 257. [2022-04-06 08:37:17,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 253 states have (on average 1.7075098814229248) internal successors, (432), 253 states have internal predecessors, (432), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:37:17,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 435 transitions. [2022-04-06 08:37:17,849 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 435 transitions. Word has length 23 [2022-04-06 08:37:17,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:37:17,849 INFO L478 AbstractCegarLoop]: Abstraction has 257 states and 435 transitions. [2022-04-06 08:37:17,850 INFO L479 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) [2022-04-06 08:37:17,850 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 435 transitions. [2022-04-06 08:37:17,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-06 08:37:17,850 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:37:17,851 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:37:17,851 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-04-06 08:37:17,851 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:37:17,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:37:17,851 INFO L85 PathProgramCache]: Analyzing trace with hash 710134838, now seen corresponding path program 1 times [2022-04-06 08:37:17,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:37:17,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321488978] [2022-04-06 08:37:17,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:37:17,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:37:17,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:37:17,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 08:37:17,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:37:17,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 08:37:17,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:37:17,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321488978] [2022-04-06 08:37:17,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321488978] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:37:17,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 08:37:17,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 08:37:17,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928516402] [2022-04-06 08:37:17,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:37:17,890 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 08:37:17,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:37:17,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 08:37:17,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 08:37:17,891 INFO L87 Difference]: Start difference. First operand 257 states and 435 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) [2022-04-06 08:37:17,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:37:17,951 INFO L93 Difference]: Finished difference Result 263 states and 436 transitions. [2022-04-06 08:37:17,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 08:37:17,951 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 [2022-04-06 08:37:17,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:37:17,952 INFO L225 Difference]: With dead ends: 263 [2022-04-06 08:37:17,952 INFO L226 Difference]: Without dead ends: 263 [2022-04-06 08:37:17,952 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 08:37:17,954 INFO L913 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, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 08:37:17,954 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 107 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 08:37:17,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-04-06 08:37:17,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 261. [2022-04-06 08:37:17,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 257 states have (on average 1.6809338521400778) internal successors, (432), 257 states have internal predecessors, (432), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:37:17,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 435 transitions. [2022-04-06 08:37:17,960 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 435 transitions. Word has length 24 [2022-04-06 08:37:17,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:37:17,960 INFO L478 AbstractCegarLoop]: Abstraction has 261 states and 435 transitions. [2022-04-06 08:37:17,960 INFO L479 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) [2022-04-06 08:37:17,960 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 435 transitions. [2022-04-06 08:37:17,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-06 08:37:17,962 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:37:17,963 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:37:17,963 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-04-06 08:37:17,963 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:37:17,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:37:17,963 INFO L85 PathProgramCache]: Analyzing trace with hash 204576213, now seen corresponding path program 1 times [2022-04-06 08:37:17,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:37:17,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262163021] [2022-04-06 08:37:17,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:37:17,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:37:17,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:37:17,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 08:37:17,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:37:17,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 08:37:17,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:37:17,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262163021] [2022-04-06 08:37:17,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262163021] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:37:17,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 08:37:17,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 08:37:17,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143644945] [2022-04-06 08:37:17,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:37:17,999 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 08:37:17,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:37:18,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 08:37:18,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 08:37:18,000 INFO L87 Difference]: Start difference. First operand 261 states and 435 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) [2022-04-06 08:37:18,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:37:18,051 INFO L93 Difference]: Finished difference Result 475 states and 800 transitions. [2022-04-06 08:37:18,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 08:37:18,051 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 [2022-04-06 08:37:18,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:37:18,053 INFO L225 Difference]: With dead ends: 475 [2022-04-06 08:37:18,053 INFO L226 Difference]: Without dead ends: 475 [2022-04-06 08:37:18,053 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 08:37:18,053 INFO L913 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 [2022-04-06 08:37:18,054 INFO L914 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] [2022-04-06 08:37:18,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-04-06 08:37:18,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 361. [2022-04-06 08:37:18,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 357 states have (on average 1.6470588235294117) internal successors, (588), 357 states have internal predecessors, (588), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:37:18,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 591 transitions. [2022-04-06 08:37:18,060 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 591 transitions. Word has length 24 [2022-04-06 08:37:18,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:37:18,061 INFO L478 AbstractCegarLoop]: Abstraction has 361 states and 591 transitions. [2022-04-06 08:37:18,061 INFO L479 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) [2022-04-06 08:37:18,061 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 591 transitions. [2022-04-06 08:37:18,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-06 08:37:18,062 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:37:18,062 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:37:18,062 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-04-06 08:37:18,062 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:37:18,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:37:18,063 INFO L85 PathProgramCache]: Analyzing trace with hash -88826794, now seen corresponding path program 1 times [2022-04-06 08:37:18,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:37:18,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577093514] [2022-04-06 08:37:18,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:37:18,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:37:18,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:37:18,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 08:37:18,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:37:18,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 08:37:18,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:37:18,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577093514] [2022-04-06 08:37:18,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577093514] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:37:18,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 08:37:18,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 08:37:18,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205059011] [2022-04-06 08:37:18,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:37:18,119 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 08:37:18,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:37:18,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 08:37:18,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 08:37:18,120 INFO L87 Difference]: Start difference. First operand 361 states and 591 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) [2022-04-06 08:37:18,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:37:18,173 INFO L93 Difference]: Finished difference Result 499 states and 808 transitions. [2022-04-06 08:37:18,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 08:37:18,174 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 [2022-04-06 08:37:18,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:37:18,176 INFO L225 Difference]: With dead ends: 499 [2022-04-06 08:37:18,176 INFO L226 Difference]: Without dead ends: 499 [2022-04-06 08:37:18,176 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 08:37:18,178 INFO L913 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 [2022-04-06 08:37:18,178 INFO L914 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] [2022-04-06 08:37:18,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-04-06 08:37:18,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 497. [2022-04-06 08:37:18,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 493 states have (on average 1.6308316430020284) internal successors, (804), 493 states have internal predecessors, (804), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:37:18,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 807 transitions. [2022-04-06 08:37:18,188 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 807 transitions. Word has length 24 [2022-04-06 08:37:18,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:37:18,188 INFO L478 AbstractCegarLoop]: Abstraction has 497 states and 807 transitions. [2022-04-06 08:37:18,188 INFO L479 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) [2022-04-06 08:37:18,188 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 807 transitions. [2022-04-06 08:37:18,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-06 08:37:18,191 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:37:18,191 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:37:18,191 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-04-06 08:37:18,191 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:37:18,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:37:18,192 INFO L85 PathProgramCache]: Analyzing trace with hash 2046927696, now seen corresponding path program 1 times [2022-04-06 08:37:18,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:37:18,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582318094] [2022-04-06 08:37:18,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:37:18,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:37:18,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:37:18,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 08:37:18,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:37:18,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 08:37:18,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:37:18,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582318094] [2022-04-06 08:37:18,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582318094] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:37:18,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 08:37:18,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 08:37:18,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037720984] [2022-04-06 08:37:18,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:37:18,224 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 08:37:18,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:37:18,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 08:37:18,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 08:37:18,225 INFO L87 Difference]: Start difference. First operand 497 states and 807 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:37:18,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:37:18,274 INFO L93 Difference]: Finished difference Result 507 states and 808 transitions. [2022-04-06 08:37:18,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 08:37:18,275 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-04-06 08:37:18,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:37:18,278 INFO L225 Difference]: With dead ends: 507 [2022-04-06 08:37:18,278 INFO L226 Difference]: Without dead ends: 507 [2022-04-06 08:37:18,278 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 08:37:18,279 INFO L913 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, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 08:37:18,279 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 104 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 08:37:18,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-04-06 08:37:18,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 505. [2022-04-06 08:37:18,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 501 states have (on average 1.6047904191616766) internal successors, (804), 501 states have internal predecessors, (804), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:37:18,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 807 transitions. [2022-04-06 08:37:18,286 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 807 transitions. Word has length 25 [2022-04-06 08:37:18,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:37:18,286 INFO L478 AbstractCegarLoop]: Abstraction has 505 states and 807 transitions. [2022-04-06 08:37:18,286 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:37:18,286 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 807 transitions. [2022-04-06 08:37:18,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-06 08:37:18,287 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:37:18,287 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:37:18,287 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-04-06 08:37:18,287 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:37:18,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:37:18,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1541369071, now seen corresponding path program 1 times [2022-04-06 08:37:18,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:37:18,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489334567] [2022-04-06 08:37:18,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:37:18,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:37:18,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:37:18,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 08:37:18,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:37:18,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 08:37:18,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:37:18,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489334567] [2022-04-06 08:37:18,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489334567] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:37:18,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 08:37:18,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 08:37:18,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318439713] [2022-04-06 08:37:18,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:37:18,308 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 08:37:18,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:37:18,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 08:37:18,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 08:37:18,308 INFO L87 Difference]: Start difference. First operand 505 states and 807 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:37:18,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:37:18,358 INFO L93 Difference]: Finished difference Result 907 states and 1464 transitions. [2022-04-06 08:37:18,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 08:37:18,358 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-04-06 08:37:18,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:37:18,361 INFO L225 Difference]: With dead ends: 907 [2022-04-06 08:37:18,361 INFO L226 Difference]: Without dead ends: 907 [2022-04-06 08:37:18,361 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 08:37:18,362 INFO L913 BasicCegarLoop]: 67 mSDtfsCounter, 140 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 08:37:18,362 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 74 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 08:37:18,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2022-04-06 08:37:18,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 713. [2022-04-06 08:37:18,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 709 states have (on average 1.5627644569816643) internal successors, (1108), 709 states have internal predecessors, (1108), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:37:18,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1111 transitions. [2022-04-06 08:37:18,372 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1111 transitions. Word has length 25 [2022-04-06 08:37:18,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:37:18,372 INFO L478 AbstractCegarLoop]: Abstraction has 713 states and 1111 transitions. [2022-04-06 08:37:18,372 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:37:18,372 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1111 transitions. [2022-04-06 08:37:18,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-06 08:37:18,373 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:37:18,373 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:37:18,373 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-04-06 08:37:18,373 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:37:18,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:37:18,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1247966064, now seen corresponding path program 1 times [2022-04-06 08:37:18,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:37:18,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559973329] [2022-04-06 08:37:18,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:37:18,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:37:18,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:37:18,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 08:37:18,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:37:18,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 08:37:18,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:37:18,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559973329] [2022-04-06 08:37:18,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559973329] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:37:18,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 08:37:18,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 08:37:18,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369172319] [2022-04-06 08:37:18,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:37:18,410 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 08:37:18,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:37:18,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 08:37:18,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 08:37:18,410 INFO L87 Difference]: Start difference. First operand 713 states and 1111 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:37:18,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:37:18,460 INFO L93 Difference]: Finished difference Result 971 states and 1496 transitions. [2022-04-06 08:37:18,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 08:37:18,460 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-04-06 08:37:18,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:37:18,462 INFO L225 Difference]: With dead ends: 971 [2022-04-06 08:37:18,462 INFO L226 Difference]: Without dead ends: 971 [2022-04-06 08:37:18,463 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 08:37:18,463 INFO L913 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, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 08:37:18,463 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 103 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 08:37:18,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2022-04-06 08:37:18,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 969. [2022-04-06 08:37:18,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 965 states have (on average 1.5461139896373057) internal successors, (1492), 965 states have internal predecessors, (1492), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:37:18,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 1495 transitions. [2022-04-06 08:37:18,475 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 1495 transitions. Word has length 25 [2022-04-06 08:37:18,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:37:18,475 INFO L478 AbstractCegarLoop]: Abstraction has 969 states and 1495 transitions. [2022-04-06 08:37:18,475 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:37:18,476 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 1495 transitions. [2022-04-06 08:37:18,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-06 08:37:18,477 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:37:18,477 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:37:18,477 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-04-06 08:37:18,477 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:37:18,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:37:18,477 INFO L85 PathProgramCache]: Analyzing trace with hash 537833458, now seen corresponding path program 1 times [2022-04-06 08:37:18,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:37:18,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746405604] [2022-04-06 08:37:18,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:37:18,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:37:18,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:37:18,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 08:37:18,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:37:18,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 08:37:18,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:37:18,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746405604] [2022-04-06 08:37:18,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746405604] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:37:18,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 08:37:18,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 08:37:18,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331615452] [2022-04-06 08:37:18,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:37:18,501 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 08:37:18,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:37:18,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 08:37:18,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 08:37:18,501 INFO L87 Difference]: Start difference. First operand 969 states and 1495 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:37:18,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:37:18,569 INFO L93 Difference]: Finished difference Result 987 states and 1496 transitions. [2022-04-06 08:37:18,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 08:37:18,569 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-04-06 08:37:18,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:37:18,572 INFO L225 Difference]: With dead ends: 987 [2022-04-06 08:37:18,572 INFO L226 Difference]: Without dead ends: 987 [2022-04-06 08:37:18,573 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 08:37:18,574 INFO L913 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 [2022-04-06 08:37:18,574 INFO L914 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] [2022-04-06 08:37:18,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2022-04-06 08:37:18,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 985. [2022-04-06 08:37:18,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 981 states have (on average 1.5208970438328238) internal successors, (1492), 981 states have internal predecessors, (1492), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:37:18,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1495 transitions. [2022-04-06 08:37:18,585 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1495 transitions. Word has length 26 [2022-04-06 08:37:18,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:37:18,586 INFO L478 AbstractCegarLoop]: Abstraction has 985 states and 1495 transitions. [2022-04-06 08:37:18,586 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:37:18,586 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1495 transitions. [2022-04-06 08:37:18,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-06 08:37:18,586 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:37:18,586 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:37:18,587 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-04-06 08:37:18,587 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:37:18,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:37:18,587 INFO L85 PathProgramCache]: Analyzing trace with hash 32274833, now seen corresponding path program 1 times [2022-04-06 08:37:18,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:37:18,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485866527] [2022-04-06 08:37:18,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:37:18,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:37:18,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:37:18,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 08:37:18,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:37:18,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 08:37:18,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:37:18,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485866527] [2022-04-06 08:37:18,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485866527] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:37:18,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 08:37:18,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 08:37:18,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819852654] [2022-04-06 08:37:18,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:37:18,619 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 08:37:18,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:37:18,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 08:37:18,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 08:37:18,619 INFO L87 Difference]: Start difference. First operand 985 states and 1495 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:37:18,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:37:18,670 INFO L93 Difference]: Finished difference Result 1739 states and 2664 transitions. [2022-04-06 08:37:18,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 08:37:18,670 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-04-06 08:37:18,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:37:18,674 INFO L225 Difference]: With dead ends: 1739 [2022-04-06 08:37:18,674 INFO L226 Difference]: Without dead ends: 1739 [2022-04-06 08:37:18,674 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 08:37:18,674 INFO L913 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, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 08:37:18,674 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 73 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 08:37:18,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1739 states. [2022-04-06 08:37:18,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1739 to 1417. [2022-04-06 08:37:18,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1417 states, 1413 states have (on average 1.4748761500353857) internal successors, (2084), 1413 states have internal predecessors, (2084), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:37:18,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1417 states to 1417 states and 2087 transitions. [2022-04-06 08:37:18,716 INFO L78 Accepts]: Start accepts. Automaton has 1417 states and 2087 transitions. Word has length 26 [2022-04-06 08:37:18,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:37:18,716 INFO L478 AbstractCegarLoop]: Abstraction has 1417 states and 2087 transitions. [2022-04-06 08:37:18,716 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:37:18,716 INFO L276 IsEmpty]: Start isEmpty. Operand 1417 states and 2087 transitions. [2022-04-06 08:37:18,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-06 08:37:18,717 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:37:18,717 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:37:18,717 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-04-06 08:37:18,717 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:37:18,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:37:18,718 INFO L85 PathProgramCache]: Analyzing trace with hash -261128174, now seen corresponding path program 1 times [2022-04-06 08:37:18,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:37:18,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836134146] [2022-04-06 08:37:18,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:37:18,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:37:18,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:37:18,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 08:37:18,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:37:18,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 08:37:18,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:37:18,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836134146] [2022-04-06 08:37:18,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836134146] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:37:18,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 08:37:18,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 08:37:18,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661487728] [2022-04-06 08:37:18,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:37:18,750 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 08:37:18,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:37:18,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 08:37:18,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 08:37:18,751 INFO L87 Difference]: Start difference. First operand 1417 states and 2087 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:37:18,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:37:18,802 INFO L93 Difference]: Finished difference Result 1899 states and 2760 transitions. [2022-04-06 08:37:18,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 08:37:18,803 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-04-06 08:37:18,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:37:18,807 INFO L225 Difference]: With dead ends: 1899 [2022-04-06 08:37:18,807 INFO L226 Difference]: Without dead ends: 1899 [2022-04-06 08:37:18,807 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 08:37:18,807 INFO L913 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, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 08:37:18,807 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 105 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 08:37:18,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2022-04-06 08:37:18,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1897. [2022-04-06 08:37:18,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1897 states, 1893 states have (on average 1.4558901215002642) internal successors, (2756), 1893 states have internal predecessors, (2756), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:37:18,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1897 states to 1897 states and 2759 transitions. [2022-04-06 08:37:18,831 INFO L78 Accepts]: Start accepts. Automaton has 1897 states and 2759 transitions. Word has length 26 [2022-04-06 08:37:18,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:37:18,831 INFO L478 AbstractCegarLoop]: Abstraction has 1897 states and 2759 transitions. [2022-04-06 08:37:18,831 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:37:18,831 INFO L276 IsEmpty]: Start isEmpty. Operand 1897 states and 2759 transitions. [2022-04-06 08:37:18,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 08:37:18,832 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:37:18,832 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:37:18,832 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-04-06 08:37:18,833 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:37:18,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:37:18,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1000552460, now seen corresponding path program 1 times [2022-04-06 08:37:18,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:37:18,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065333176] [2022-04-06 08:37:18,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:37:18,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:37:18,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:37:18,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 08:37:18,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:37:18,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 08:37:18,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:37:18,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065333176] [2022-04-06 08:37:18,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065333176] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:37:18,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 08:37:18,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 08:37:18,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554339892] [2022-04-06 08:37:18,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:37:18,849 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 08:37:18,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:37:18,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 08:37:18,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 08:37:18,850 INFO L87 Difference]: Start difference. First operand 1897 states and 2759 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:37:18,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:37:18,896 INFO L93 Difference]: Finished difference Result 1931 states and 2760 transitions. [2022-04-06 08:37:18,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 08:37:18,897 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-04-06 08:37:18,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:37:18,901 INFO L225 Difference]: With dead ends: 1931 [2022-04-06 08:37:18,902 INFO L226 Difference]: Without dead ends: 1931 [2022-04-06 08:37:18,902 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 08:37:18,902 INFO L913 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, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 08:37:18,902 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 98 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 08:37:18,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1931 states. [2022-04-06 08:37:18,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1931 to 1929. [2022-04-06 08:37:18,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1929 states, 1925 states have (on average 1.4316883116883117) internal successors, (2756), 1925 states have internal predecessors, (2756), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:37:18,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1929 states to 1929 states and 2759 transitions. [2022-04-06 08:37:18,926 INFO L78 Accepts]: Start accepts. Automaton has 1929 states and 2759 transitions. Word has length 27 [2022-04-06 08:37:18,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:37:18,926 INFO L478 AbstractCegarLoop]: Abstraction has 1929 states and 2759 transitions. [2022-04-06 08:37:18,927 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:37:18,927 INFO L276 IsEmpty]: Start isEmpty. Operand 1929 states and 2759 transitions. [2022-04-06 08:37:18,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 08:37:18,928 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:37:18,928 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:37:18,928 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-04-06 08:37:18,928 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:37:18,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:37:18,928 INFO L85 PathProgramCache]: Analyzing trace with hash 494993835, now seen corresponding path program 1 times [2022-04-06 08:37:18,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:37:18,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21084685] [2022-04-06 08:37:18,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:37:18,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:37:18,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:37:18,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 08:37:18,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:37:18,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 08:37:18,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:37:18,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21084685] [2022-04-06 08:37:18,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21084685] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:37:18,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 08:37:18,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 08:37:18,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443178690] [2022-04-06 08:37:18,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:37:18,947 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 08:37:18,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:37:18,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 08:37:18,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 08:37:18,947 INFO L87 Difference]: Start difference. First operand 1929 states and 2759 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:37:18,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:37:18,997 INFO L93 Difference]: Finished difference Result 3339 states and 4808 transitions. [2022-04-06 08:37:18,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 08:37:18,997 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-04-06 08:37:18,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:37:19,005 INFO L225 Difference]: With dead ends: 3339 [2022-04-06 08:37:19,005 INFO L226 Difference]: Without dead ends: 3339 [2022-04-06 08:37:19,005 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 08:37:19,005 INFO L913 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 [2022-04-06 08:37:19,006 INFO L914 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] [2022-04-06 08:37:19,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3339 states. [2022-04-06 08:37:19,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3339 to 2825. [2022-04-06 08:37:19,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2825 states, 2821 states have (on average 1.3853243530662886) internal successors, (3908), 2821 states have internal predecessors, (3908), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:37:19,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2825 states to 2825 states and 3911 transitions. [2022-04-06 08:37:19,043 INFO L78 Accepts]: Start accepts. Automaton has 2825 states and 3911 transitions. Word has length 27 [2022-04-06 08:37:19,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:37:19,043 INFO L478 AbstractCegarLoop]: Abstraction has 2825 states and 3911 transitions. [2022-04-06 08:37:19,043 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:37:19,043 INFO L276 IsEmpty]: Start isEmpty. Operand 2825 states and 3911 transitions. [2022-04-06 08:37:19,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 08:37:19,045 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:37:19,045 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:37:19,045 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-04-06 08:37:19,046 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:37:19,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:37:19,046 INFO L85 PathProgramCache]: Analyzing trace with hash 201590828, now seen corresponding path program 1 times [2022-04-06 08:37:19,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:37:19,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76854975] [2022-04-06 08:37:19,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:37:19,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:37:19,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:37:19,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 08:37:19,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:37:19,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 08:37:19,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:37:19,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76854975] [2022-04-06 08:37:19,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76854975] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:37:19,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 08:37:19,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 08:37:19,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121550613] [2022-04-06 08:37:19,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:37:19,066 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 08:37:19,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:37:19,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 08:37:19,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 08:37:19,066 INFO L87 Difference]: Start difference. First operand 2825 states and 3911 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:37:19,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:37:19,120 INFO L93 Difference]: Finished difference Result 3723 states and 5064 transitions. [2022-04-06 08:37:19,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 08:37:19,120 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-04-06 08:37:19,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:37:19,128 INFO L225 Difference]: With dead ends: 3723 [2022-04-06 08:37:19,128 INFO L226 Difference]: Without dead ends: 3723 [2022-04-06 08:37:19,128 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 08:37:19,128 INFO L913 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 [2022-04-06 08:37:19,129 INFO L914 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] [2022-04-06 08:37:19,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3723 states. [2022-04-06 08:37:19,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3723 to 3721. [2022-04-06 08:37:19,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3721 states, 3717 states have (on average 1.3613128867366155) internal successors, (5060), 3717 states have internal predecessors, (5060), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:37:19,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3721 states to 3721 states and 5063 transitions. [2022-04-06 08:37:19,192 INFO L78 Accepts]: Start accepts. Automaton has 3721 states and 5063 transitions. Word has length 27 [2022-04-06 08:37:19,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:37:19,192 INFO L478 AbstractCegarLoop]: Abstraction has 3721 states and 5063 transitions. [2022-04-06 08:37:19,192 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:37:19,192 INFO L276 IsEmpty]: Start isEmpty. Operand 3721 states and 5063 transitions. [2022-04-06 08:37:19,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 08:37:19,195 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:37:19,195 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:37:19,195 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-04-06 08:37:19,195 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:37:19,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:37:19,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1835027538, now seen corresponding path program 1 times [2022-04-06 08:37:19,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:37:19,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841356939] [2022-04-06 08:37:19,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:37:19,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:37:19,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:37:19,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 08:37:19,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:37:19,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 08:37:19,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:37:19,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841356939] [2022-04-06 08:37:19,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841356939] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:37:19,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 08:37:19,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 08:37:19,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507952125] [2022-04-06 08:37:19,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:37:19,217 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 08:37:19,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:37:19,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 08:37:19,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 08:37:19,218 INFO L87 Difference]: Start difference. First operand 3721 states and 5063 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:37:19,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:37:19,269 INFO L93 Difference]: Finished difference Result 3787 states and 5064 transitions. [2022-04-06 08:37:19,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 08:37:19,269 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-04-06 08:37:19,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:37:19,277 INFO L225 Difference]: With dead ends: 3787 [2022-04-06 08:37:19,277 INFO L226 Difference]: Without dead ends: 3787 [2022-04-06 08:37:19,277 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 08:37:19,278 INFO L913 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 [2022-04-06 08:37:19,278 INFO L914 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] [2022-04-06 08:37:19,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3787 states. [2022-04-06 08:37:19,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3787 to 3785. [2022-04-06 08:37:19,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3785 states, 3781 states have (on average 1.3382702988627346) internal successors, (5060), 3781 states have internal predecessors, (5060), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:37:19,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3785 states to 3785 states and 5063 transitions. [2022-04-06 08:37:19,320 INFO L78 Accepts]: Start accepts. Automaton has 3785 states and 5063 transitions. Word has length 28 [2022-04-06 08:37:19,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:37:19,320 INFO L478 AbstractCegarLoop]: Abstraction has 3785 states and 5063 transitions. [2022-04-06 08:37:19,320 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:37:19,320 INFO L276 IsEmpty]: Start isEmpty. Operand 3785 states and 5063 transitions. [2022-04-06 08:37:19,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 08:37:19,324 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:37:19,324 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:37:19,324 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-04-06 08:37:19,324 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:37:19,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:37:19,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1954381133, now seen corresponding path program 1 times [2022-04-06 08:37:19,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:37:19,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774835055] [2022-04-06 08:37:19,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:37:19,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:37:19,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:37:19,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 08:37:19,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:37:19,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 08:37:19,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:37:19,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774835055] [2022-04-06 08:37:19,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774835055] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:37:19,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 08:37:19,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 08:37:19,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862483462] [2022-04-06 08:37:19,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:37:19,360 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 08:37:19,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:37:19,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 08:37:19,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 08:37:19,360 INFO L87 Difference]: Start difference. First operand 3785 states and 5063 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:37:19,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:37:19,415 INFO L93 Difference]: Finished difference Result 6411 states and 8584 transitions. [2022-04-06 08:37:19,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 08:37:19,415 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-04-06 08:37:19,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:37:19,446 INFO L225 Difference]: With dead ends: 6411 [2022-04-06 08:37:19,447 INFO L226 Difference]: Without dead ends: 6411 [2022-04-06 08:37:19,447 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 08:37:19,448 INFO L913 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 [2022-04-06 08:37:19,448 INFO L914 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] [2022-04-06 08:37:19,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6411 states. [2022-04-06 08:37:19,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6411 to 5641. [2022-04-06 08:37:19,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5641 states, 5637 states have (on average 1.2950150789427) internal successors, (7300), 5637 states have internal predecessors, (7300), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:37:19,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5641 states to 5641 states and 7303 transitions. [2022-04-06 08:37:19,529 INFO L78 Accepts]: Start accepts. Automaton has 5641 states and 7303 transitions. Word has length 28 [2022-04-06 08:37:19,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:37:19,529 INFO L478 AbstractCegarLoop]: Abstraction has 5641 states and 7303 transitions. [2022-04-06 08:37:19,530 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:37:19,530 INFO L276 IsEmpty]: Start isEmpty. Operand 5641 states and 7303 transitions. [2022-04-06 08:37:19,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 08:37:19,534 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:37:19,534 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:37:19,534 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-04-06 08:37:19,534 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:37:19,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:37:19,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1660978126, now seen corresponding path program 1 times [2022-04-06 08:37:19,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:37:19,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103238141] [2022-04-06 08:37:19,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:37:19,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:37:19,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:37:19,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 08:37:19,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:37:19,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 08:37:19,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:37:19,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103238141] [2022-04-06 08:37:19,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103238141] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:37:19,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 08:37:19,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 08:37:19,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125973772] [2022-04-06 08:37:19,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:37:19,558 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 08:37:19,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:37:19,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 08:37:19,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 08:37:19,558 INFO L87 Difference]: Start difference. First operand 5641 states and 7303 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:37:19,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:37:19,612 INFO L93 Difference]: Finished difference Result 7307 states and 9224 transitions. [2022-04-06 08:37:19,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 08:37:19,612 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-04-06 08:37:19,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:37:19,646 INFO L225 Difference]: With dead ends: 7307 [2022-04-06 08:37:19,646 INFO L226 Difference]: Without dead ends: 7307 [2022-04-06 08:37:19,646 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 08:37:19,647 INFO L913 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 [2022-04-06 08:37:19,647 INFO L914 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] [2022-04-06 08:37:19,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7307 states. [2022-04-06 08:37:19,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7307 to 7305. [2022-04-06 08:37:19,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7305 states, 7301 states have (on average 1.2628407067524996) internal successors, (9220), 7301 states have internal predecessors, (9220), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:37:19,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7305 states to 7305 states and 9223 transitions. [2022-04-06 08:37:19,724 INFO L78 Accepts]: Start accepts. Automaton has 7305 states and 9223 transitions. Word has length 28 [2022-04-06 08:37:19,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:37:19,724 INFO L478 AbstractCegarLoop]: Abstraction has 7305 states and 9223 transitions. [2022-04-06 08:37:19,724 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:37:19,724 INFO L276 IsEmpty]: Start isEmpty. Operand 7305 states and 9223 transitions. [2022-04-06 08:37:19,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 08:37:19,729 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:37:19,729 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:37:19,729 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-04-06 08:37:19,729 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:37:19,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:37:19,731 INFO L85 PathProgramCache]: Analyzing trace with hash 456305864, now seen corresponding path program 1 times [2022-04-06 08:37:19,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:37:19,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399323269] [2022-04-06 08:37:19,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:37:19,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:37:19,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:37:19,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 08:37:19,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:37:19,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 08:37:19,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:37:19,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399323269] [2022-04-06 08:37:19,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399323269] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:37:19,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 08:37:19,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 08:37:19,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389588214] [2022-04-06 08:37:19,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:37:19,754 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 08:37:19,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:37:19,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 08:37:19,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 08:37:19,754 INFO L87 Difference]: Start difference. First operand 7305 states and 9223 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:37:19,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:37:19,807 INFO L93 Difference]: Finished difference Result 7435 states and 9224 transitions. [2022-04-06 08:37:19,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 08:37:19,807 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-04-06 08:37:19,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:37:19,815 INFO L225 Difference]: With dead ends: 7435 [2022-04-06 08:37:19,816 INFO L226 Difference]: Without dead ends: 7435 [2022-04-06 08:37:19,816 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 08:37:19,817 INFO L913 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 [2022-04-06 08:37:19,818 INFO L914 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] [2022-04-06 08:37:19,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7435 states. [2022-04-06 08:37:19,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7435 to 7433. [2022-04-06 08:37:19,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7433 states, 7429 states have (on average 1.2410822452550814) internal successors, (9220), 7429 states have internal predecessors, (9220), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:37:19,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7433 states to 7433 states and 9223 transitions. [2022-04-06 08:37:19,884 INFO L78 Accepts]: Start accepts. Automaton has 7433 states and 9223 transitions. Word has length 29 [2022-04-06 08:37:19,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:37:19,884 INFO L478 AbstractCegarLoop]: Abstraction has 7433 states and 9223 transitions. [2022-04-06 08:37:19,884 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:37:19,884 INFO L276 IsEmpty]: Start isEmpty. Operand 7433 states and 9223 transitions. [2022-04-06 08:37:19,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 08:37:19,889 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:37:19,889 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:37:19,889 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-04-06 08:37:19,889 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:37:19,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:37:19,890 INFO L85 PathProgramCache]: Analyzing trace with hash -49252761, now seen corresponding path program 1 times [2022-04-06 08:37:19,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:37:19,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965949188] [2022-04-06 08:37:19,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:37:19,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:37:19,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:37:19,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 08:37:19,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:37:19,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 08:37:19,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:37:19,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965949188] [2022-04-06 08:37:19,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965949188] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:37:19,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 08:37:19,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 08:37:19,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533561744] [2022-04-06 08:37:19,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:37:19,908 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 08:37:19,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:37:19,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 08:37:19,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 08:37:19,908 INFO L87 Difference]: Start difference. First operand 7433 states and 9223 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:37:19,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:37:19,969 INFO L93 Difference]: Finished difference Result 12299 states and 15112 transitions. [2022-04-06 08:37:19,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 08:37:19,969 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-04-06 08:37:19,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:37:19,982 INFO L225 Difference]: With dead ends: 12299 [2022-04-06 08:37:19,982 INFO L226 Difference]: Without dead ends: 12299 [2022-04-06 08:37:19,982 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 08:37:19,983 INFO L913 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 [2022-04-06 08:37:19,985 INFO L914 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] [2022-04-06 08:37:19,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12299 states. [2022-04-06 08:37:20,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12299 to 11273. [2022-04-06 08:37:20,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11273 states, 11269 states have (on average 1.2043659597124856) internal successors, (13572), 11269 states have internal predecessors, (13572), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:37:20,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11273 states to 11273 states and 13575 transitions. [2022-04-06 08:37:20,097 INFO L78 Accepts]: Start accepts. Automaton has 11273 states and 13575 transitions. Word has length 29 [2022-04-06 08:37:20,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:37:20,097 INFO L478 AbstractCegarLoop]: Abstraction has 11273 states and 13575 transitions. [2022-04-06 08:37:20,097 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:37:20,097 INFO L276 IsEmpty]: Start isEmpty. Operand 11273 states and 13575 transitions. [2022-04-06 08:37:20,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 08:37:20,106 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:37:20,106 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:37:20,106 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-04-06 08:37:20,106 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:37:20,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:37:20,107 INFO L85 PathProgramCache]: Analyzing trace with hash -342655768, now seen corresponding path program 1 times [2022-04-06 08:37:20,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:37:20,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607099171] [2022-04-06 08:37:20,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:37:20,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:37:20,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:37:20,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 08:37:20,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:37:20,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 08:37:20,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:37:20,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607099171] [2022-04-06 08:37:20,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607099171] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:37:20,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 08:37:20,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 08:37:20,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979456231] [2022-04-06 08:37:20,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:37:20,134 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 08:37:20,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:37:20,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 08:37:20,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 08:37:20,134 INFO L87 Difference]: Start difference. First operand 11273 states and 13575 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:37:20,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:37:20,202 INFO L93 Difference]: Finished difference Result 14347 states and 16648 transitions. [2022-04-06 08:37:20,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 08:37:20,202 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-04-06 08:37:20,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:37:20,223 INFO L225 Difference]: With dead ends: 14347 [2022-04-06 08:37:20,224 INFO L226 Difference]: Without dead ends: 14347 [2022-04-06 08:37:20,224 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 08:37:20,224 INFO L913 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 [2022-04-06 08:37:20,224 INFO L914 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] [2022-04-06 08:37:20,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14347 states. [2022-04-06 08:37:20,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14347 to 14345. [2022-04-06 08:37:20,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14345 states, 14341 states have (on average 1.1605885224182415) internal successors, (16644), 14341 states have internal predecessors, (16644), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:37:20,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14345 states to 14345 states and 16647 transitions. [2022-04-06 08:37:20,397 INFO L78 Accepts]: Start accepts. Automaton has 14345 states and 16647 transitions. Word has length 29 [2022-04-06 08:37:20,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:37:20,397 INFO L478 AbstractCegarLoop]: Abstraction has 14345 states and 16647 transitions. [2022-04-06 08:37:20,397 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:37:20,398 INFO L276 IsEmpty]: Start isEmpty. Operand 14345 states and 16647 transitions. [2022-04-06 08:37:20,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-06 08:37:20,408 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:37:20,408 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:37:20,408 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-04-06 08:37:20,408 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:37:20,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:37:20,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1526802582, now seen corresponding path program 1 times [2022-04-06 08:37:20,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:37:20,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281971034] [2022-04-06 08:37:20,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:37:20,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:37:20,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:37:20,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 08:37:20,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:37:20,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 08:37:20,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:37:20,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281971034] [2022-04-06 08:37:20,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281971034] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:37:20,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 08:37:20,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 08:37:20,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659834303] [2022-04-06 08:37:20,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:37:20,424 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 08:37:20,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:37:20,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 08:37:20,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 08:37:20,425 INFO L87 Difference]: Start difference. First operand 14345 states and 16647 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:37:20,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:37:20,539 INFO L93 Difference]: Finished difference Result 14603 states and 16648 transitions. [2022-04-06 08:37:20,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 08:37:20,539 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-04-06 08:37:20,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:37:20,556 INFO L225 Difference]: With dead ends: 14603 [2022-04-06 08:37:20,556 INFO L226 Difference]: Without dead ends: 14603 [2022-04-06 08:37:20,556 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 08:37:20,557 INFO L913 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 [2022-04-06 08:37:20,557 INFO L914 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] [2022-04-06 08:37:20,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14603 states. [2022-04-06 08:37:20,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14603 to 14601. [2022-04-06 08:37:20,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14601 states, 14597 states have (on average 1.1402342947180928) internal successors, (16644), 14597 states have internal predecessors, (16644), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:37:20,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14601 states to 14601 states and 16647 transitions. [2022-04-06 08:37:20,723 INFO L78 Accepts]: Start accepts. Automaton has 14601 states and 16647 transitions. Word has length 30 [2022-04-06 08:37:20,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:37:20,723 INFO L478 AbstractCegarLoop]: Abstraction has 14601 states and 16647 transitions. [2022-04-06 08:37:20,723 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:37:20,723 INFO L276 IsEmpty]: Start isEmpty. Operand 14601 states and 16647 transitions. [2022-04-06 08:37:20,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-06 08:37:20,733 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:37:20,733 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:37:20,733 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-04-06 08:37:20,733 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:37:20,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:37:20,734 INFO L85 PathProgramCache]: Analyzing trace with hash -2032361207, now seen corresponding path program 1 times [2022-04-06 08:37:20,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:37:20,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019824807] [2022-04-06 08:37:20,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:37:20,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:37:20,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:37:20,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 08:37:20,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:37:20,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 08:37:20,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:37:20,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019824807] [2022-04-06 08:37:20,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019824807] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:37:20,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 08:37:20,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 08:37:20,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741546883] [2022-04-06 08:37:20,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:37:20,753 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 08:37:20,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:37:20,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 08:37:20,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 08:37:20,754 INFO L87 Difference]: Start difference. First operand 14601 states and 16647 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:37:20,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:37:20,879 INFO L93 Difference]: Finished difference Result 23561 states and 26119 transitions. [2022-04-06 08:37:20,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 08:37:20,880 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-04-06 08:37:20,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:37:20,906 INFO L225 Difference]: With dead ends: 23561 [2022-04-06 08:37:20,906 INFO L226 Difference]: Without dead ends: 23561 [2022-04-06 08:37:20,907 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 08:37:20,907 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 104 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 68 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 [2022-04-06 08:37:20,907 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 68 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 08:37:20,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23561 states. [2022-04-06 08:37:21,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23561 to 22537. [2022-04-06 08:37:21,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22537 states, 22533 states have (on average 1.1135667687391826) internal successors, (25092), 22533 states have internal predecessors, (25092), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:37:21,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22537 states to 22537 states and 25095 transitions. [2022-04-06 08:37:21,147 INFO L78 Accepts]: Start accepts. Automaton has 22537 states and 25095 transitions. Word has length 30 [2022-04-06 08:37:21,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:37:21,147 INFO L478 AbstractCegarLoop]: Abstraction has 22537 states and 25095 transitions. [2022-04-06 08:37:21,147 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:37:21,147 INFO L276 IsEmpty]: Start isEmpty. Operand 22537 states and 25095 transitions. [2022-04-06 08:37:21,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-06 08:37:21,169 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:37:21,169 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:37:21,169 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-04-06 08:37:21,169 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:37:21,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:37:21,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1969203082, now seen corresponding path program 1 times [2022-04-06 08:37:21,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:37:21,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769991611] [2022-04-06 08:37:21,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:37:21,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:37:21,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:37:21,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 08:37:21,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:37:21,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 08:37:21,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:37:21,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769991611] [2022-04-06 08:37:21,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769991611] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:37:21,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 08:37:21,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 08:37:21,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805391022] [2022-04-06 08:37:21,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:37:21,188 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 08:37:21,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:37:21,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 08:37:21,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 08:37:21,189 INFO L87 Difference]: Start difference. First operand 22537 states and 25095 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:37:21,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:37:21,307 INFO L93 Difference]: Finished difference Result 28167 states and 29702 transitions. [2022-04-06 08:37:21,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 08:37:21,307 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-04-06 08:37:21,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:37:21,308 INFO L225 Difference]: With dead ends: 28167 [2022-04-06 08:37:21,308 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 08:37:21,308 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 08:37:21,308 INFO L913 BasicCegarLoop]: 105 mSDtfsCounter, 91 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 08:37:21,309 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 112 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 08:37:21,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 08:37:21,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 08:37:21,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-06 08:37:21,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 08:37:21,309 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 30 [2022-04-06 08:37:21,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:37:21,309 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 08:37:21,309 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:37:21,309 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 08:37:21,309 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 08:37:21,312 INFO L788 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 08:37:21,312 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-04-06 08:37:21,316 INFO L719 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:37:21,316 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 08:37:21,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 08:37:21 BasicIcfg [2022-04-06 08:37:21,319 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 08:37:21,319 INFO L158 Benchmark]: Toolchain (without parser) took 5244.88ms. Allocated memory was 189.8MB in the beginning and 520.1MB in the end (delta: 330.3MB). Free memory was 139.4MB in the beginning and 278.2MB in the end (delta: -138.8MB). Peak memory consumption was 192.8MB. Max. memory is 8.0GB. [2022-04-06 08:37:21,319 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 189.8MB. Free memory is still 156.1MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 08:37:21,319 INFO L158 Benchmark]: CACSL2BoogieTranslator took 245.79ms. Allocated memory is still 189.8MB. Free memory was 139.3MB in the beginning and 165.0MB in the end (delta: -25.7MB). Peak memory consumption was 7.5MB. Max. memory is 8.0GB. [2022-04-06 08:37:21,319 INFO L158 Benchmark]: Boogie Preprocessor took 35.49ms. Allocated memory is still 189.8MB. Free memory was 165.0MB in the beginning and 163.3MB in the end (delta: 1.7MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 08:37:21,320 INFO L158 Benchmark]: RCFGBuilder took 297.34ms. Allocated memory is still 189.8MB. Free memory was 163.3MB in the beginning and 151.0MB in the end (delta: 12.4MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-04-06 08:37:21,322 INFO L158 Benchmark]: IcfgTransformer took 24.98ms. Allocated memory is still 189.8MB. Free memory was 150.8MB in the beginning and 149.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-06 08:37:21,322 INFO L158 Benchmark]: TraceAbstraction took 4633.34ms. Allocated memory was 189.8MB in the beginning and 520.1MB in the end (delta: 330.3MB). Free memory was 148.9MB in the beginning and 278.2MB in the end (delta: -129.3MB). Peak memory consumption was 201.3MB. Max. memory is 8.0GB. [2022-04-06 08:37:21,328 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 189.8MB. Free memory is still 156.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 245.79ms. Allocated memory is still 189.8MB. Free memory was 139.3MB in the beginning and 165.0MB in the end (delta: -25.7MB). Peak memory consumption was 7.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 35.49ms. Allocated memory is still 189.8MB. Free memory was 165.0MB in the beginning and 163.3MB in the end (delta: 1.7MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 297.34ms. Allocated memory is still 189.8MB. Free memory was 163.3MB in the beginning and 151.0MB in the end (delta: 12.4MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * IcfgTransformer took 24.98ms. Allocated memory is still 189.8MB. Free memory was 150.8MB in the beginning and 149.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 4633.34ms. Allocated memory was 189.8MB in the beginning and 520.1MB in the end (delta: 330.3MB). Free memory was 148.9MB in the beginning and 278.2MB in the end (delta: -129.3MB). Peak memory consumption was 201.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 163]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 45 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4.6s, OverallIterations: 29, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.1s, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3720 SdHoareTripleChecker+Valid, 1.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3720 mSDsluCounter, 2693 SdHoareTripleChecker+Invalid, 1.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 205 mSDsCounter, 68 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1747 IncrementalHoareTripleChecker+Invalid, 1815 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 68 mSolverCounterUnsat, 2488 mSDtfsCounter, 1747 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 203 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22537occurred in iteration=28, InterpolantAutomatonStates: 116, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.2s AutomataMinimizationTime, 29 MinimizatonAttempts, 4126 StatesRemovedByMinimization, 28 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 744 NumberOfCodeBlocks, 744 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 715 ConstructedInterpolants, 0 QuantifiedInterpolants, 1579 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 29 InterpolantComputations, 29 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-04-06 08:37:21,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...