/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_11.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 18:45:21,639 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 18:45:21,641 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 18:45:21,702 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-17 18:45:21,715 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 18:45:21,716 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 18:45:21,717 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 18:45:21,719 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 18:45:21,719 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 18:45:21,720 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 18:45:21,721 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 18:45:21,725 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 18:45:21,727 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 18:45:21,728 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 18:45:21,729 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 18:45:21,729 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 18:45:21,730 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 18:45:21,735 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 18:45:21,741 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 18:45:21,741 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 18:45:21,743 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 18:45:21,743 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-17 18:45:21,752 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 18:45:21,752 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 18:45:21,754 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 18:45:21,754 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-17 18:45:21,754 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 18:45:21,754 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-17 18:45:21,755 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 18:45:21,755 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 18:45:21,755 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 18:45:21,755 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 18:45:21,755 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-17 18:45:21,756 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 18:45:21,756 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 18:45:21,756 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 18:45:21,756 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 18:45:21,756 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 18:45:21,756 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-17 18:45:21,756 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 18:45:21,756 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 18:45:21,756 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 18:45:21,757 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 18:45:21,757 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 18:45:21,757 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 18:45:21,945 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 18:45:21,963 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 18:45:21,964 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 18:45:21,965 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 18:45:21,966 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 18:45:21,966 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_11.c [2022-03-17 18:45:22,008 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f0f2821a/2ef048089a8f437c8f19dd735d7940f4/FLAGcef18c992 [2022-03-17 18:45:22,306 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 18:45:22,307 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_11.c [2022-03-17 18:45:22,313 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f0f2821a/2ef048089a8f437c8f19dd735d7940f4/FLAGcef18c992 [2022-03-17 18:45:22,730 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f0f2821a/2ef048089a8f437c8f19dd735d7940f4 [2022-03-17 18:45:22,733 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 18:45:22,733 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 18:45:22,735 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 18:45:22,736 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 18:45:22,747 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 18:45:22,747 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 06:45:22" (1/1) ... [2022-03-17 18:45:22,748 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63fd4a3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:45:22, skipping insertion in model container [2022-03-17 18:45:22,748 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 06:45:22" (1/1) ... [2022-03-17 18:45:22,752 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 18:45:22,768 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 18:45:23,003 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_11.c[4246,4259] [2022-03-17 18:45:23,006 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 18:45:23,011 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 18:45:23,042 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_11.c[4246,4259] [2022-03-17 18:45:23,043 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 18:45:23,051 INFO L208 MainTranslator]: Completed translation [2022-03-17 18:45:23,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:45:23 WrapperNode [2022-03-17 18:45:23,051 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 18:45:23,052 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 18:45:23,052 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 18:45:23,052 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 18:45:23,059 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:45:23" (1/1) ... [2022-03-17 18:45:23,059 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:45:23" (1/1) ... [2022-03-17 18:45:23,063 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:45:23" (1/1) ... [2022-03-17 18:45:23,063 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:45:23" (1/1) ... [2022-03-17 18:45:23,067 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:45:23" (1/1) ... [2022-03-17 18:45:23,070 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:45:23" (1/1) ... [2022-03-17 18:45:23,071 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:45:23" (1/1) ... [2022-03-17 18:45:23,072 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 18:45:23,073 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 18:45:23,073 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 18:45:23,073 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 18:45:23,074 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:45:23" (1/1) ... [2022-03-17 18:45:23,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 18:45:23,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 18:45:23,095 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-17 18:45:23,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-17 18:45:23,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 18:45:23,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 18:45:23,129 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 18:45:23,129 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 18:45:23,129 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 18:45:23,129 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 18:45:23,129 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 18:45:23,129 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 18:45:23,129 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-17 18:45:23,129 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 18:45:23,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 18:45:23,130 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 18:45:23,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 18:45:23,130 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 18:45:23,130 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 18:45:23,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 18:45:23,192 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 18:45:23,195 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 18:45:23,327 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 18:45:23,331 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 18:45:23,331 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-17 18:45:23,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 06:45:23 BoogieIcfgContainer [2022-03-17 18:45:23,333 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 18:45:23,333 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 18:45:23,333 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 18:45:23,334 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 18:45:23,336 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 06:45:23" (1/1) ... [2022-03-17 18:45:23,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 06:45:23 BasicIcfg [2022-03-17 18:45:23,351 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 18:45:23,352 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 18:45:23,352 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 18:45:23,354 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 18:45:23,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 06:45:22" (1/4) ... [2022-03-17 18:45:23,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ea479df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 06:45:23, skipping insertion in model container [2022-03-17 18:45:23,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:45:23" (2/4) ... [2022-03-17 18:45:23,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ea479df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 06:45:23, skipping insertion in model container [2022-03-17 18:45:23,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 06:45:23" (3/4) ... [2022-03-17 18:45:23,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ea479df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 06:45:23, skipping insertion in model container [2022-03-17 18:45:23,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 06:45:23" (4/4) ... [2022-03-17 18:45:23,356 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_11.cJordan [2022-03-17 18:45:23,359 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-17 18:45:23,359 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 18:45:23,385 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 18:45:23,389 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 [2022-03-17 18:45:23,390 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 18:45:23,398 INFO L276 IsEmpty]: Start isEmpty. Operand has 48 states, 42 states have (on average 1.880952380952381) internal successors, (79), 43 states have internal predecessors, (79), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 18:45:23,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-17 18:45:23,404 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:45:23,404 INFO L500 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] [2022-03-17 18:45:23,405 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:45:23,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:45:23,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1766201146, now seen corresponding path program 1 times [2022-03-17 18:45:23,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:45:23,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973977518] [2022-03-17 18:45:23,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:45:23,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:45:23,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:23,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 18:45:23,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:23,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 18:45:23,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:45:23,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973977518] [2022-03-17 18:45:23,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973977518] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 18:45:23,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 18:45:23,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 18:45:23,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185815507] [2022-03-17 18:45:23,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 18:45:23,624 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 18:45:23,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:45:23,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 18:45:23,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 18:45:23,646 INFO L87 Difference]: Start difference. First operand has 48 states, 42 states have (on average 1.880952380952381) internal successors, (79), 43 states have internal predecessors, (79), 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 4.75) 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) [2022-03-17 18:45:23,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:45:23,792 INFO L93 Difference]: Finished difference Result 87 states and 150 transitions. [2022-03-17 18:45:23,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 18:45:23,794 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 [2022-03-17 18:45:23,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:45:23,800 INFO L225 Difference]: With dead ends: 87 [2022-03-17 18:45:23,800 INFO L226 Difference]: Without dead ends: 79 [2022-03-17 18:45:23,801 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 18:45:23,805 INFO L912 BasicCegarLoop]: 86 mSDtfsCounter, 191 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 18:45:23,805 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 95 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 18:45:23,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-17 18:45:23,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 55. [2022-03-17 18:45:23,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 51 states have (on average 1.8627450980392157) internal successors, (95), 51 states have internal predecessors, (95), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:23,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 98 transitions. [2022-03-17 18:45:23,829 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 98 transitions. Word has length 22 [2022-03-17 18:45:23,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:45:23,829 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 98 transitions. [2022-03-17 18:45:23,829 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) [2022-03-17 18:45:23,829 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 98 transitions. [2022-03-17 18:45:23,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-17 18:45:23,830 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:45:23,830 INFO L500 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] [2022-03-17 18:45:23,830 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 18:45:23,831 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:45:23,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:45:23,831 INFO L85 PathProgramCache]: Analyzing trace with hash 2023207525, now seen corresponding path program 1 times [2022-03-17 18:45:23,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:45:23,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514363539] [2022-03-17 18:45:23,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:45:23,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:45:23,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:23,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 18:45:23,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:23,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 18:45:23,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:45:23,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514363539] [2022-03-17 18:45:23,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514363539] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 18:45:23,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 18:45:23,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 18:45:23,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662180481] [2022-03-17 18:45:23,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 18:45:23,880 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 18:45:23,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:45:23,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 18:45:23,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 18:45:23,881 INFO L87 Difference]: Start difference. First operand 55 states and 98 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) [2022-03-17 18:45:23,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:45:23,956 INFO L93 Difference]: Finished difference Result 79 states and 139 transitions. [2022-03-17 18:45:23,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 18:45:23,956 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 [2022-03-17 18:45:23,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:45:23,957 INFO L225 Difference]: With dead ends: 79 [2022-03-17 18:45:23,958 INFO L226 Difference]: Without dead ends: 79 [2022-03-17 18:45:23,958 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 18:45:23,959 INFO L912 BasicCegarLoop]: 96 mSDtfsCounter, 163 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 18:45:23,959 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 103 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 18:45:23,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-17 18:45:23,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2022-03-17 18:45:23,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 73 states have (on average 1.8493150684931507) internal successors, (135), 73 states have internal predecessors, (135), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:23,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 138 transitions. [2022-03-17 18:45:23,965 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 138 transitions. Word has length 22 [2022-03-17 18:45:23,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:45:23,966 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 138 transitions. [2022-03-17 18:45:23,966 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) [2022-03-17 18:45:23,966 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 138 transitions. [2022-03-17 18:45:23,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-17 18:45:23,967 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:45:23,967 INFO L500 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] [2022-03-17 18:45:23,967 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-17 18:45:23,967 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:45:23,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:45:23,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1082371358, now seen corresponding path program 1 times [2022-03-17 18:45:23,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:45:23,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223508979] [2022-03-17 18:45:23,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:45:23,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:45:23,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:24,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 18:45:24,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:24,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 18:45:24,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:45:24,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223508979] [2022-03-17 18:45:24,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223508979] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 18:45:24,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 18:45:24,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 18:45:24,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231044900] [2022-03-17 18:45:24,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 18:45:24,021 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 18:45:24,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:45:24,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 18:45:24,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 18:45:24,021 INFO L87 Difference]: Start difference. First operand 77 states and 138 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) [2022-03-17 18:45:24,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:45:24,102 INFO L93 Difference]: Finished difference Result 82 states and 141 transitions. [2022-03-17 18:45:24,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 18:45:24,103 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 [2022-03-17 18:45:24,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:45:24,106 INFO L225 Difference]: With dead ends: 82 [2022-03-17 18:45:24,106 INFO L226 Difference]: Without dead ends: 82 [2022-03-17 18:45:24,107 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 18:45:24,108 INFO L912 BasicCegarLoop]: 116 mSDtfsCounter, 144 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 18:45:24,109 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 123 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 18:45:24,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-03-17 18:45:24,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2022-03-17 18:45:24,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 76 states have (on average 1.8026315789473684) internal successors, (137), 76 states have internal predecessors, (137), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:24,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 140 transitions. [2022-03-17 18:45:24,114 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 140 transitions. Word has length 23 [2022-03-17 18:45:24,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:45:24,115 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 140 transitions. [2022-03-17 18:45:24,115 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) [2022-03-17 18:45:24,115 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 140 transitions. [2022-03-17 18:45:24,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-17 18:45:24,115 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:45:24,116 INFO L500 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] [2022-03-17 18:45:24,116 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-17 18:45:24,116 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:45:24,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:45:24,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1705044129, now seen corresponding path program 1 times [2022-03-17 18:45:24,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:45:24,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484395368] [2022-03-17 18:45:24,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:45:24,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:45:24,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:24,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 18:45:24,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:24,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 18:45:24,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:45:24,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484395368] [2022-03-17 18:45:24,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484395368] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 18:45:24,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 18:45:24,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 18:45:24,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982758968] [2022-03-17 18:45:24,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 18:45:24,181 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 18:45:24,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:45:24,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 18:45:24,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 18:45:24,182 INFO L87 Difference]: Start difference. First operand 80 states and 140 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) [2022-03-17 18:45:24,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:45:24,270 INFO L93 Difference]: Finished difference Result 147 states and 262 transitions. [2022-03-17 18:45:24,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 18:45:24,270 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 [2022-03-17 18:45:24,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:45:24,271 INFO L225 Difference]: With dead ends: 147 [2022-03-17 18:45:24,271 INFO L226 Difference]: Without dead ends: 147 [2022-03-17 18:45:24,272 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 18:45:24,273 INFO L912 BasicCegarLoop]: 76 mSDtfsCounter, 178 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 18:45:24,273 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 83 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 18:45:24,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-03-17 18:45:24,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 105. [2022-03-17 18:45:24,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 101 states have (on average 1.801980198019802) internal successors, (182), 101 states have internal predecessors, (182), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:24,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 185 transitions. [2022-03-17 18:45:24,279 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 185 transitions. Word has length 23 [2022-03-17 18:45:24,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:45:24,279 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 185 transitions. [2022-03-17 18:45:24,279 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) [2022-03-17 18:45:24,279 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 185 transitions. [2022-03-17 18:45:24,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-17 18:45:24,280 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:45:24,280 INFO L500 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] [2022-03-17 18:45:24,280 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-17 18:45:24,280 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:45:24,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:45:24,280 INFO L85 PathProgramCache]: Analyzing trace with hash 2084364542, now seen corresponding path program 1 times [2022-03-17 18:45:24,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:45:24,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36876642] [2022-03-17 18:45:24,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:45:24,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:45:24,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:24,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 18:45:24,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:24,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 18:45:24,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:45:24,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36876642] [2022-03-17 18:45:24,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36876642] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 18:45:24,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 18:45:24,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 18:45:24,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759073875] [2022-03-17 18:45:24,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 18:45:24,339 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 18:45:24,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:45:24,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 18:45:24,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 18:45:24,340 INFO L87 Difference]: Start difference. First operand 105 states and 185 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) [2022-03-17 18:45:24,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:45:24,409 INFO L93 Difference]: Finished difference Result 149 states and 260 transitions. [2022-03-17 18:45:24,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 18:45:24,409 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 [2022-03-17 18:45:24,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:45:24,410 INFO L225 Difference]: With dead ends: 149 [2022-03-17 18:45:24,410 INFO L226 Difference]: Without dead ends: 149 [2022-03-17 18:45:24,410 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 18:45:24,417 INFO L912 BasicCegarLoop]: 98 mSDtfsCounter, 157 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 18:45:24,418 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 105 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 18:45:24,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-03-17 18:45:24,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 147. [2022-03-17 18:45:24,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 143 states have (on average 1.7902097902097902) internal successors, (256), 143 states have internal predecessors, (256), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:24,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 259 transitions. [2022-03-17 18:45:24,428 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 259 transitions. Word has length 23 [2022-03-17 18:45:24,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:45:24,428 INFO L478 AbstractCegarLoop]: Abstraction has 147 states and 259 transitions. [2022-03-17 18:45:24,428 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) [2022-03-17 18:45:24,429 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 259 transitions. [2022-03-17 18:45:24,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-17 18:45:24,429 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:45:24,429 INFO L500 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] [2022-03-17 18:45:24,429 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-17 18:45:24,429 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:45:24,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:45:24,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1316728287, now seen corresponding path program 1 times [2022-03-17 18:45:24,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:45:24,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478578841] [2022-03-17 18:45:24,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:45:24,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:45:24,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:24,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 18:45:24,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:24,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 18:45:24,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:45:24,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478578841] [2022-03-17 18:45:24,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478578841] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 18:45:24,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 18:45:24,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 18:45:24,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315530001] [2022-03-17 18:45:24,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 18:45:24,467 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 18:45:24,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:45:24,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 18:45:24,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 18:45:24,468 INFO L87 Difference]: Start difference. First operand 147 states and 259 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) [2022-03-17 18:45:24,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:45:24,529 INFO L93 Difference]: Finished difference Result 151 states and 260 transitions. [2022-03-17 18:45:24,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 18:45:24,530 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 [2022-03-17 18:45:24,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:45:24,531 INFO L225 Difference]: With dead ends: 151 [2022-03-17 18:45:24,531 INFO L226 Difference]: Without dead ends: 151 [2022-03-17 18:45:24,531 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 18:45:24,533 INFO L912 BasicCegarLoop]: 113 mSDtfsCounter, 143 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 18:45:24,536 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 120 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 18:45:24,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-03-17 18:45:24,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 149. [2022-03-17 18:45:24,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 145 states have (on average 1.7655172413793103) internal successors, (256), 145 states have internal predecessors, (256), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:24,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 259 transitions. [2022-03-17 18:45:24,550 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 259 transitions. Word has length 24 [2022-03-17 18:45:24,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:45:24,551 INFO L478 AbstractCegarLoop]: Abstraction has 149 states and 259 transitions. [2022-03-17 18:45:24,551 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) [2022-03-17 18:45:24,551 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 259 transitions. [2022-03-17 18:45:24,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-17 18:45:24,552 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:45:24,552 INFO L500 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] [2022-03-17 18:45:24,552 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-17 18:45:24,552 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:45:24,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:45:24,552 INFO L85 PathProgramCache]: Analyzing trace with hash 190823522, now seen corresponding path program 1 times [2022-03-17 18:45:24,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:45:24,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603172148] [2022-03-17 18:45:24,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:45:24,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:45:24,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:24,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 18:45:24,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:24,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 18:45:24,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:45:24,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603172148] [2022-03-17 18:45:24,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603172148] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 18:45:24,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 18:45:24,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 18:45:24,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916123546] [2022-03-17 18:45:24,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 18:45:24,585 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 18:45:24,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:45:24,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 18:45:24,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 18:45:24,586 INFO L87 Difference]: Start difference. First operand 149 states and 259 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) [2022-03-17 18:45:24,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:45:24,656 INFO L93 Difference]: Finished difference Result 275 states and 484 transitions. [2022-03-17 18:45:24,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 18:45:24,656 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 [2022-03-17 18:45:24,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:45:24,658 INFO L225 Difference]: With dead ends: 275 [2022-03-17 18:45:24,658 INFO L226 Difference]: Without dead ends: 275 [2022-03-17 18:45:24,658 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 18:45:24,659 INFO L912 BasicCegarLoop]: 75 mSDtfsCounter, 171 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 18:45:24,659 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 82 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 18:45:24,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-03-17 18:45:24,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 201. [2022-03-17 18:45:24,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 197 states have (on average 1.7461928934010151) internal successors, (344), 197 states have internal predecessors, (344), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:24,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 347 transitions. [2022-03-17 18:45:24,674 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 347 transitions. Word has length 24 [2022-03-17 18:45:24,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:45:24,674 INFO L478 AbstractCegarLoop]: Abstraction has 201 states and 347 transitions. [2022-03-17 18:45:24,674 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) [2022-03-17 18:45:24,675 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 347 transitions. [2022-03-17 18:45:24,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-17 18:45:24,678 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:45:24,678 INFO L500 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] [2022-03-17 18:45:24,678 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-17 18:45:24,678 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:45:24,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:45:24,678 INFO L85 PathProgramCache]: Analyzing trace with hash -314735103, now seen corresponding path program 1 times [2022-03-17 18:45:24,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:45:24,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457823430] [2022-03-17 18:45:24,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:45:24,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:45:24,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:24,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 18:45:24,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:24,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 18:45:24,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:45:24,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457823430] [2022-03-17 18:45:24,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457823430] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 18:45:24,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 18:45:24,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 18:45:24,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134615902] [2022-03-17 18:45:24,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 18:45:24,715 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 18:45:24,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:45:24,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 18:45:24,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 18:45:24,716 INFO L87 Difference]: Start difference. First operand 201 states and 347 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) [2022-03-17 18:45:24,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:45:24,781 INFO L93 Difference]: Finished difference Result 283 states and 484 transitions. [2022-03-17 18:45:24,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 18:45:24,783 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 [2022-03-17 18:45:24,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:45:24,788 INFO L225 Difference]: With dead ends: 283 [2022-03-17 18:45:24,788 INFO L226 Difference]: Without dead ends: 283 [2022-03-17 18:45:24,789 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 18:45:24,789 INFO L912 BasicCegarLoop]: 100 mSDtfsCounter, 151 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 18:45:24,789 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 107 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 18:45:24,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-03-17 18:45:24,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 281. [2022-03-17 18:45:24,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 277 states have (on average 1.7328519855595668) internal successors, (480), 277 states have internal predecessors, (480), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:24,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 483 transitions. [2022-03-17 18:45:24,795 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 483 transitions. Word has length 24 [2022-03-17 18:45:24,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:45:24,795 INFO L478 AbstractCegarLoop]: Abstraction has 281 states and 483 transitions. [2022-03-17 18:45:24,795 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) [2022-03-17 18:45:24,795 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 483 transitions. [2022-03-17 18:45:24,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-17 18:45:24,796 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:45:24,796 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:45:24,796 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-17 18:45:24,796 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:45:24,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:45:24,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1620594170, now seen corresponding path program 1 times [2022-03-17 18:45:24,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:45:24,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49456423] [2022-03-17 18:45:24,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:45:24,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:45:24,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:24,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 18:45:24,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:24,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 18:45:24,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:45:24,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49456423] [2022-03-17 18:45:24,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49456423] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 18:45:24,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 18:45:24,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 18:45:24,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682172943] [2022-03-17 18:45:24,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 18:45:24,823 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 18:45:24,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:45:24,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 18:45:24,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 18:45:24,824 INFO L87 Difference]: Start difference. First operand 281 states and 483 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:24,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:45:24,876 INFO L93 Difference]: Finished difference Result 287 states and 484 transitions. [2022-03-17 18:45:24,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 18:45:24,878 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-03-17 18:45:24,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:45:24,879 INFO L225 Difference]: With dead ends: 287 [2022-03-17 18:45:24,879 INFO L226 Difference]: Without dead ends: 287 [2022-03-17 18:45:24,879 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 18:45:24,879 INFO L912 BasicCegarLoop]: 110 mSDtfsCounter, 142 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 18:45:24,880 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 117 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 18:45:24,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-03-17 18:45:24,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 285. [2022-03-17 18:45:24,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 281 states have (on average 1.708185053380783) internal successors, (480), 281 states have internal predecessors, (480), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:24,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 483 transitions. [2022-03-17 18:45:24,885 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 483 transitions. Word has length 25 [2022-03-17 18:45:24,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:45:24,885 INFO L478 AbstractCegarLoop]: Abstraction has 285 states and 483 transitions. [2022-03-17 18:45:24,885 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:24,885 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 483 transitions. [2022-03-17 18:45:24,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-17 18:45:24,886 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:45:24,886 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:45:24,886 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-17 18:45:24,886 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:45:24,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:45:24,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1166821317, now seen corresponding path program 1 times [2022-03-17 18:45:24,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:45:24,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152204991] [2022-03-17 18:45:24,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:45:24,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:45:24,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:24,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 18:45:24,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:24,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 18:45:24,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:45:24,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152204991] [2022-03-17 18:45:24,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152204991] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 18:45:24,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 18:45:24,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 18:45:24,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107311778] [2022-03-17 18:45:24,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 18:45:24,911 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 18:45:24,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:45:24,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 18:45:24,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 18:45:24,912 INFO L87 Difference]: Start difference. First operand 285 states and 483 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:24,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:45:24,965 INFO L93 Difference]: Finished difference Result 547 states and 912 transitions. [2022-03-17 18:45:24,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 18:45:24,966 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-03-17 18:45:24,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:45:24,967 INFO L225 Difference]: With dead ends: 547 [2022-03-17 18:45:24,967 INFO L226 Difference]: Without dead ends: 547 [2022-03-17 18:45:24,968 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 18:45:24,968 INFO L912 BasicCegarLoop]: 80 mSDtfsCounter, 170 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 18:45:24,968 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 87 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 18:45:24,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2022-03-17 18:45:24,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 545. [2022-03-17 18:45:24,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 541 states have (on average 1.6783733826247689) internal successors, (908), 541 states have internal predecessors, (908), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:24,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 911 transitions. [2022-03-17 18:45:24,977 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 911 transitions. Word has length 25 [2022-03-17 18:45:24,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:45:24,978 INFO L478 AbstractCegarLoop]: Abstraction has 545 states and 911 transitions. [2022-03-17 18:45:24,978 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:24,978 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 911 transitions. [2022-03-17 18:45:24,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-17 18:45:24,980 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:45:24,980 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:45:24,980 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-17 18:45:24,980 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:45:24,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:45:24,981 INFO L85 PathProgramCache]: Analyzing trace with hash -661262692, now seen corresponding path program 1 times [2022-03-17 18:45:24,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:45:24,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138449321] [2022-03-17 18:45:24,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:45:24,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:45:25,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:25,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 18:45:25,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:25,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 18:45:25,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:45:25,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138449321] [2022-03-17 18:45:25,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138449321] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 18:45:25,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 18:45:25,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 18:45:25,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923060172] [2022-03-17 18:45:25,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 18:45:25,033 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 18:45:25,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:45:25,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 18:45:25,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 18:45:25,033 INFO L87 Difference]: Start difference. First operand 545 states and 911 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:25,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:45:25,087 INFO L93 Difference]: Finished difference Result 675 states and 1144 transitions. [2022-03-17 18:45:25,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 18:45:25,087 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-03-17 18:45:25,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:45:25,089 INFO L225 Difference]: With dead ends: 675 [2022-03-17 18:45:25,089 INFO L226 Difference]: Without dead ends: 675 [2022-03-17 18:45:25,089 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 18:45:25,090 INFO L912 BasicCegarLoop]: 125 mSDtfsCounter, 109 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 18:45:25,090 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 132 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 18:45:25,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2022-03-17 18:45:25,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 545. [2022-03-17 18:45:25,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 541 states have (on average 1.6635859519408502) internal successors, (900), 541 states have internal predecessors, (900), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:25,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 903 transitions. [2022-03-17 18:45:25,099 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 903 transitions. Word has length 25 [2022-03-17 18:45:25,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:45:25,100 INFO L478 AbstractCegarLoop]: Abstraction has 545 states and 903 transitions. [2022-03-17 18:45:25,100 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:25,100 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 903 transitions. [2022-03-17 18:45:25,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-17 18:45:25,100 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:45:25,101 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:45:25,101 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-17 18:45:25,101 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:45:25,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:45:25,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1811690051, now seen corresponding path program 1 times [2022-03-17 18:45:25,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:45:25,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954377912] [2022-03-17 18:45:25,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:45:25,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:45:25,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:25,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 18:45:25,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:25,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 18:45:25,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:45:25,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954377912] [2022-03-17 18:45:25,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954377912] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 18:45:25,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 18:45:25,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 18:45:25,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738574918] [2022-03-17 18:45:25,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 18:45:25,147 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 18:45:25,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:45:25,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 18:45:25,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 18:45:25,147 INFO L87 Difference]: Start difference. First operand 545 states and 903 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:25,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:45:25,199 INFO L93 Difference]: Finished difference Result 995 states and 1664 transitions. [2022-03-17 18:45:25,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 18:45:25,199 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-03-17 18:45:25,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:45:25,202 INFO L225 Difference]: With dead ends: 995 [2022-03-17 18:45:25,203 INFO L226 Difference]: Without dead ends: 995 [2022-03-17 18:45:25,203 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 18:45:25,203 INFO L912 BasicCegarLoop]: 73 mSDtfsCounter, 157 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 18:45:25,203 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 80 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 18:45:25,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2022-03-17 18:45:25,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 769. [2022-03-17 18:45:25,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 765 states have (on average 1.6261437908496732) internal successors, (1244), 765 states have internal predecessors, (1244), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:25,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 1247 transitions. [2022-03-17 18:45:25,216 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 1247 transitions. Word has length 26 [2022-03-17 18:45:25,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:45:25,217 INFO L478 AbstractCegarLoop]: Abstraction has 769 states and 1247 transitions. [2022-03-17 18:45:25,217 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:25,217 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 1247 transitions. [2022-03-17 18:45:25,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-17 18:45:25,218 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:45:25,218 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:45:25,218 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-17 18:45:25,218 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:45:25,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:45:25,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1977718620, now seen corresponding path program 1 times [2022-03-17 18:45:25,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:45:25,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013679268] [2022-03-17 18:45:25,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:45:25,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:45:25,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:25,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 18:45:25,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:25,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 18:45:25,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:45:25,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013679268] [2022-03-17 18:45:25,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013679268] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 18:45:25,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 18:45:25,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 18:45:25,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100646800] [2022-03-17 18:45:25,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 18:45:25,251 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 18:45:25,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:45:25,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 18:45:25,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 18:45:25,252 INFO L87 Difference]: Start difference. First operand 769 states and 1247 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:25,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:45:25,304 INFO L93 Difference]: Finished difference Result 1059 states and 1704 transitions. [2022-03-17 18:45:25,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 18:45:25,304 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-03-17 18:45:25,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:45:25,307 INFO L225 Difference]: With dead ends: 1059 [2022-03-17 18:45:25,307 INFO L226 Difference]: Without dead ends: 1059 [2022-03-17 18:45:25,307 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 18:45:25,308 INFO L912 BasicCegarLoop]: 104 mSDtfsCounter, 139 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 18:45:25,308 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 111 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 18:45:25,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2022-03-17 18:45:25,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 1057. [2022-03-17 18:45:25,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1057 states, 1053 states have (on average 1.6144349477682811) internal successors, (1700), 1053 states have internal predecessors, (1700), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:25,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 1703 transitions. [2022-03-17 18:45:25,324 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 1703 transitions. Word has length 26 [2022-03-17 18:45:25,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:45:25,324 INFO L478 AbstractCegarLoop]: Abstraction has 1057 states and 1703 transitions. [2022-03-17 18:45:25,324 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:25,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 1703 transitions. [2022-03-17 18:45:25,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-17 18:45:25,325 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:45:25,326 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:45:25,326 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-03-17 18:45:25,326 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:45:25,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:45:25,326 INFO L85 PathProgramCache]: Analyzing trace with hash -327784201, now seen corresponding path program 1 times [2022-03-17 18:45:25,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:45:25,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589259136] [2022-03-17 18:45:25,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:45:25,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:45:25,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:25,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 18:45:25,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:25,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 18:45:25,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:45:25,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589259136] [2022-03-17 18:45:25,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589259136] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 18:45:25,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 18:45:25,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 18:45:25,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663532632] [2022-03-17 18:45:25,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 18:45:25,362 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 18:45:25,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:45:25,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 18:45:25,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 18:45:25,363 INFO L87 Difference]: Start difference. First operand 1057 states and 1703 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:25,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:45:25,417 INFO L93 Difference]: Finished difference Result 1083 states and 1720 transitions. [2022-03-17 18:45:25,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 18:45:25,417 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-17 18:45:25,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:45:25,420 INFO L225 Difference]: With dead ends: 1083 [2022-03-17 18:45:25,420 INFO L226 Difference]: Without dead ends: 1083 [2022-03-17 18:45:25,420 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 18:45:25,421 INFO L912 BasicCegarLoop]: 104 mSDtfsCounter, 140 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 18:45:25,421 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 111 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 18:45:25,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2022-03-17 18:45:25,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 1081. [2022-03-17 18:45:25,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1081 states, 1077 states have (on average 1.5933147632311977) internal successors, (1716), 1077 states have internal predecessors, (1716), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:25,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 1719 transitions. [2022-03-17 18:45:25,437 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 1719 transitions. Word has length 27 [2022-03-17 18:45:25,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:45:25,438 INFO L478 AbstractCegarLoop]: Abstraction has 1081 states and 1719 transitions. [2022-03-17 18:45:25,438 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:25,438 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 1719 transitions. [2022-03-17 18:45:25,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-17 18:45:25,439 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:45:25,439 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:45:25,439 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-03-17 18:45:25,439 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:45:25,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:45:25,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1179767608, now seen corresponding path program 1 times [2022-03-17 18:45:25,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:45:25,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099889026] [2022-03-17 18:45:25,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:45:25,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:45:25,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:25,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 18:45:25,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:25,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 18:45:25,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:45:25,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099889026] [2022-03-17 18:45:25,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099889026] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 18:45:25,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 18:45:25,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 18:45:25,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343996924] [2022-03-17 18:45:25,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 18:45:25,475 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 18:45:25,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:45:25,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 18:45:25,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 18:45:25,475 INFO L87 Difference]: Start difference. First operand 1081 states and 1719 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:25,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:45:25,528 INFO L93 Difference]: Finished difference Result 1931 states and 3096 transitions. [2022-03-17 18:45:25,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 18:45:25,529 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-17 18:45:25,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:45:25,533 INFO L225 Difference]: With dead ends: 1931 [2022-03-17 18:45:25,534 INFO L226 Difference]: Without dead ends: 1931 [2022-03-17 18:45:25,535 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 18:45:25,536 INFO L912 BasicCegarLoop]: 72 mSDtfsCounter, 150 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 18:45:25,536 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 79 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 18:45:25,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1931 states. [2022-03-17 18:45:25,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1931 to 1545. [2022-03-17 18:45:25,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1545 states, 1541 states have (on average 1.5496430889033095) internal successors, (2388), 1541 states have internal predecessors, (2388), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:25,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1545 states to 1545 states and 2391 transitions. [2022-03-17 18:45:25,560 INFO L78 Accepts]: Start accepts. Automaton has 1545 states and 2391 transitions. Word has length 27 [2022-03-17 18:45:25,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:45:25,560 INFO L478 AbstractCegarLoop]: Abstraction has 1545 states and 2391 transitions. [2022-03-17 18:45:25,560 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:25,560 INFO L276 IsEmpty]: Start isEmpty. Operand 1545 states and 2391 transitions. [2022-03-17 18:45:25,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-17 18:45:25,562 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:45:25,562 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:45:25,562 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-03-17 18:45:25,562 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:45:25,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:45:25,563 INFO L85 PathProgramCache]: Analyzing trace with hash 674208983, now seen corresponding path program 1 times [2022-03-17 18:45:25,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:45:25,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230529361] [2022-03-17 18:45:25,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:45:25,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:45:25,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:25,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 18:45:25,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:25,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 18:45:25,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:45:25,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230529361] [2022-03-17 18:45:25,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230529361] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 18:45:25,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 18:45:25,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 18:45:25,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208953318] [2022-03-17 18:45:25,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 18:45:25,596 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 18:45:25,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:45:25,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 18:45:25,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 18:45:25,597 INFO L87 Difference]: Start difference. First operand 1545 states and 2391 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:25,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:45:25,663 INFO L93 Difference]: Finished difference Result 2091 states and 3208 transitions. [2022-03-17 18:45:25,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 18:45:25,664 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-17 18:45:25,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:45:25,669 INFO L225 Difference]: With dead ends: 2091 [2022-03-17 18:45:25,669 INFO L226 Difference]: Without dead ends: 2091 [2022-03-17 18:45:25,669 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 18:45:25,670 INFO L912 BasicCegarLoop]: 106 mSDtfsCounter, 133 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 18:45:25,670 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 113 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 18:45:25,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2091 states. [2022-03-17 18:45:25,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2091 to 2089. [2022-03-17 18:45:25,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2089 states, 2085 states have (on average 1.5366906474820143) internal successors, (3204), 2085 states have internal predecessors, (3204), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:25,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2089 states to 2089 states and 3207 transitions. [2022-03-17 18:45:25,703 INFO L78 Accepts]: Start accepts. Automaton has 2089 states and 3207 transitions. Word has length 27 [2022-03-17 18:45:25,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:45:25,703 INFO L478 AbstractCegarLoop]: Abstraction has 2089 states and 3207 transitions. [2022-03-17 18:45:25,703 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:25,703 INFO L276 IsEmpty]: Start isEmpty. Operand 2089 states and 3207 transitions. [2022-03-17 18:45:25,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-17 18:45:25,705 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:45:25,705 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:45:25,705 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-03-17 18:45:25,705 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:45:25,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:45:25,705 INFO L85 PathProgramCache]: Analyzing trace with hash -2081877160, now seen corresponding path program 1 times [2022-03-17 18:45:25,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:45:25,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930531082] [2022-03-17 18:45:25,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:45:25,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:45:25,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:25,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 18:45:25,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:25,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 18:45:25,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:45:25,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930531082] [2022-03-17 18:45:25,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930531082] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 18:45:25,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 18:45:25,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 18:45:25,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920589581] [2022-03-17 18:45:25,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 18:45:25,734 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 18:45:25,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:45:25,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 18:45:25,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 18:45:25,734 INFO L87 Difference]: Start difference. First operand 2089 states and 3207 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:25,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:45:25,788 INFO L93 Difference]: Finished difference Result 2123 states and 3208 transitions. [2022-03-17 18:45:25,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 18:45:25,788 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-03-17 18:45:25,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:45:25,793 INFO L225 Difference]: With dead ends: 2123 [2022-03-17 18:45:25,793 INFO L226 Difference]: Without dead ends: 2123 [2022-03-17 18:45:25,793 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 18:45:25,794 INFO L912 BasicCegarLoop]: 101 mSDtfsCounter, 139 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 108 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 [2022-03-17 18:45:25,795 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 108 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 18:45:25,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2123 states. [2022-03-17 18:45:25,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2123 to 2121. [2022-03-17 18:45:25,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2121 states, 2117 states have (on average 1.5134624468587623) internal successors, (3204), 2117 states have internal predecessors, (3204), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:25,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2121 states to 2121 states and 3207 transitions. [2022-03-17 18:45:25,825 INFO L78 Accepts]: Start accepts. Automaton has 2121 states and 3207 transitions. Word has length 28 [2022-03-17 18:45:25,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:45:25,825 INFO L478 AbstractCegarLoop]: Abstraction has 2121 states and 3207 transitions. [2022-03-17 18:45:25,825 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:25,825 INFO L276 IsEmpty]: Start isEmpty. Operand 2121 states and 3207 transitions. [2022-03-17 18:45:25,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-17 18:45:25,826 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:45:25,826 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:45:25,826 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-03-17 18:45:25,827 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:45:25,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:45:25,827 INFO L85 PathProgramCache]: Analyzing trace with hash -574325351, now seen corresponding path program 1 times [2022-03-17 18:45:25,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:45:25,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93219565] [2022-03-17 18:45:25,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:45:25,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:45:25,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:25,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 18:45:25,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:25,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 18:45:25,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:45:25,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93219565] [2022-03-17 18:45:25,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93219565] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 18:45:25,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 18:45:25,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 18:45:25,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109290141] [2022-03-17 18:45:25,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 18:45:25,849 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 18:45:25,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:45:25,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 18:45:25,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 18:45:25,849 INFO L87 Difference]: Start difference. First operand 2121 states and 3207 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:25,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:45:25,909 INFO L93 Difference]: Finished difference Result 3723 states and 5672 transitions. [2022-03-17 18:45:25,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 18:45:25,909 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-03-17 18:45:25,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:45:25,918 INFO L225 Difference]: With dead ends: 3723 [2022-03-17 18:45:25,919 INFO L226 Difference]: Without dead ends: 3723 [2022-03-17 18:45:25,919 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 18:45:25,919 INFO L912 BasicCegarLoop]: 71 mSDtfsCounter, 143 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 18:45:25,919 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 78 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 18:45:25,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3723 states. [2022-03-17 18:45:25,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3723 to 3081. [2022-03-17 18:45:25,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3081 states, 3077 states have (on average 1.4676633084172896) internal successors, (4516), 3077 states have internal predecessors, (4516), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:25,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3081 states to 3081 states and 4519 transitions. [2022-03-17 18:45:25,965 INFO L78 Accepts]: Start accepts. Automaton has 3081 states and 4519 transitions. Word has length 28 [2022-03-17 18:45:25,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:45:25,966 INFO L478 AbstractCegarLoop]: Abstraction has 3081 states and 4519 transitions. [2022-03-17 18:45:25,966 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:25,966 INFO L276 IsEmpty]: Start isEmpty. Operand 3081 states and 4519 transitions. [2022-03-17 18:45:25,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-17 18:45:25,969 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:45:25,969 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:45:25,969 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-03-17 18:45:25,969 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:45:25,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:45:25,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1079883976, now seen corresponding path program 1 times [2022-03-17 18:45:25,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:45:25,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898480940] [2022-03-17 18:45:25,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:45:25,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:45:25,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:25,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 18:45:25,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:25,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 18:45:25,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:45:25,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898480940] [2022-03-17 18:45:25,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898480940] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 18:45:25,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 18:45:25,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 18:45:25,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296392376] [2022-03-17 18:45:25,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 18:45:25,989 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 18:45:25,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:45:25,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 18:45:25,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 18:45:25,989 INFO L87 Difference]: Start difference. First operand 3081 states and 4519 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:26,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:45:26,050 INFO L93 Difference]: Finished difference Result 4107 states and 5960 transitions. [2022-03-17 18:45:26,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 18:45:26,051 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-03-17 18:45:26,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:45:26,061 INFO L225 Difference]: With dead ends: 4107 [2022-03-17 18:45:26,061 INFO L226 Difference]: Without dead ends: 4107 [2022-03-17 18:45:26,061 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 18:45:26,061 INFO L912 BasicCegarLoop]: 108 mSDtfsCounter, 127 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 18:45:26,062 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 115 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 18:45:26,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4107 states. [2022-03-17 18:45:26,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4107 to 4105. [2022-03-17 18:45:26,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4105 states, 4101 states have (on average 1.4523287003169958) internal successors, (5956), 4101 states have internal predecessors, (5956), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:26,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4105 states to 4105 states and 5959 transitions. [2022-03-17 18:45:26,122 INFO L78 Accepts]: Start accepts. Automaton has 4105 states and 5959 transitions. Word has length 28 [2022-03-17 18:45:26,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:45:26,122 INFO L478 AbstractCegarLoop]: Abstraction has 4105 states and 5959 transitions. [2022-03-17 18:45:26,122 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:26,122 INFO L276 IsEmpty]: Start isEmpty. Operand 4105 states and 5959 transitions. [2022-03-17 18:45:26,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-17 18:45:26,125 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:45:26,126 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:45:26,126 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-03-17 18:45:26,126 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:45:26,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:45:26,126 INFO L85 PathProgramCache]: Analyzing trace with hash -624183917, now seen corresponding path program 1 times [2022-03-17 18:45:26,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:45:26,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589736898] [2022-03-17 18:45:26,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:45:26,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:45:26,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:26,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 18:45:26,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:26,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 18:45:26,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:45:26,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589736898] [2022-03-17 18:45:26,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589736898] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 18:45:26,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 18:45:26,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 18:45:26,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77352749] [2022-03-17 18:45:26,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 18:45:26,148 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 18:45:26,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:45:26,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 18:45:26,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 18:45:26,148 INFO L87 Difference]: Start difference. First operand 4105 states and 5959 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:26,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:45:26,231 INFO L93 Difference]: Finished difference Result 4171 states and 5960 transitions. [2022-03-17 18:45:26,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 18:45:26,231 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-17 18:45:26,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:45:26,241 INFO L225 Difference]: With dead ends: 4171 [2022-03-17 18:45:26,242 INFO L226 Difference]: Without dead ends: 4171 [2022-03-17 18:45:26,242 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 18:45:26,242 INFO L912 BasicCegarLoop]: 98 mSDtfsCounter, 138 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 105 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 [2022-03-17 18:45:26,242 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 105 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 18:45:26,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4171 states. [2022-03-17 18:45:26,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4171 to 4169. [2022-03-17 18:45:26,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4169 states, 4165 states have (on average 1.4300120048019207) internal successors, (5956), 4165 states have internal predecessors, (5956), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:26,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4169 states to 4169 states and 5959 transitions. [2022-03-17 18:45:26,297 INFO L78 Accepts]: Start accepts. Automaton has 4169 states and 5959 transitions. Word has length 29 [2022-03-17 18:45:26,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:45:26,298 INFO L478 AbstractCegarLoop]: Abstraction has 4169 states and 5959 transitions. [2022-03-17 18:45:26,298 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:26,298 INFO L276 IsEmpty]: Start isEmpty. Operand 4169 states and 5959 transitions. [2022-03-17 18:45:26,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-17 18:45:26,301 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:45:26,301 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:45:26,301 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-03-17 18:45:26,301 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:45:26,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:45:26,301 INFO L85 PathProgramCache]: Analyzing trace with hash 883367892, now seen corresponding path program 1 times [2022-03-17 18:45:26,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:45:26,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964211538] [2022-03-17 18:45:26,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:45:26,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:45:26,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:26,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 18:45:26,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:26,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 18:45:26,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:45:26,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964211538] [2022-03-17 18:45:26,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964211538] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 18:45:26,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 18:45:26,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 18:45:26,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744262467] [2022-03-17 18:45:26,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 18:45:26,320 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 18:45:26,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:45:26,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 18:45:26,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 18:45:26,321 INFO L87 Difference]: Start difference. First operand 4169 states and 5959 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:26,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:45:26,397 INFO L93 Difference]: Finished difference Result 7179 states and 10312 transitions. [2022-03-17 18:45:26,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 18:45:26,397 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-17 18:45:26,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:45:26,407 INFO L225 Difference]: With dead ends: 7179 [2022-03-17 18:45:26,407 INFO L226 Difference]: Without dead ends: 7179 [2022-03-17 18:45:26,408 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 18:45:26,408 INFO L912 BasicCegarLoop]: 70 mSDtfsCounter, 136 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 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 [2022-03-17 18:45:26,408 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 77 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 18:45:26,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7179 states. [2022-03-17 18:45:26,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7179 to 6153. [2022-03-17 18:45:26,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6153 states, 6149 states have (on average 1.3849406407545943) internal successors, (8516), 6149 states have internal predecessors, (8516), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:26,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6153 states to 6153 states and 8519 transitions. [2022-03-17 18:45:26,521 INFO L78 Accepts]: Start accepts. Automaton has 6153 states and 8519 transitions. Word has length 29 [2022-03-17 18:45:26,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:45:26,521 INFO L478 AbstractCegarLoop]: Abstraction has 6153 states and 8519 transitions. [2022-03-17 18:45:26,522 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:26,522 INFO L276 IsEmpty]: Start isEmpty. Operand 6153 states and 8519 transitions. [2022-03-17 18:45:26,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-17 18:45:26,528 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:45:26,528 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:45:26,528 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-03-17 18:45:26,528 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:45:26,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:45:26,528 INFO L85 PathProgramCache]: Analyzing trace with hash 377809267, now seen corresponding path program 1 times [2022-03-17 18:45:26,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:45:26,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087624805] [2022-03-17 18:45:26,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:45:26,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:45:26,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:26,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 18:45:26,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:26,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 18:45:26,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:45:26,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087624805] [2022-03-17 18:45:26,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087624805] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 18:45:26,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 18:45:26,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 18:45:26,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36531780] [2022-03-17 18:45:26,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 18:45:26,558 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 18:45:26,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:45:26,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 18:45:26,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 18:45:26,559 INFO L87 Difference]: Start difference. First operand 6153 states and 8519 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:26,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:45:26,621 INFO L93 Difference]: Finished difference Result 8075 states and 11016 transitions. [2022-03-17 18:45:26,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 18:45:26,622 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-17 18:45:26,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:45:26,633 INFO L225 Difference]: With dead ends: 8075 [2022-03-17 18:45:26,633 INFO L226 Difference]: Without dead ends: 8075 [2022-03-17 18:45:26,634 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 18:45:26,635 INFO L912 BasicCegarLoop]: 110 mSDtfsCounter, 121 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 18:45:26,635 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 117 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 18:45:26,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8075 states. [2022-03-17 18:45:26,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8075 to 8073. [2022-03-17 18:45:26,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8073 states, 8069 states have (on average 1.3647292105589293) internal successors, (11012), 8069 states have internal predecessors, (11012), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:26,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8073 states to 8073 states and 11015 transitions. [2022-03-17 18:45:26,775 INFO L78 Accepts]: Start accepts. Automaton has 8073 states and 11015 transitions. Word has length 29 [2022-03-17 18:45:26,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:45:26,775 INFO L478 AbstractCegarLoop]: Abstraction has 8073 states and 11015 transitions. [2022-03-17 18:45:26,775 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:26,775 INFO L276 IsEmpty]: Start isEmpty. Operand 8073 states and 11015 transitions. [2022-03-17 18:45:26,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-17 18:45:26,782 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:45:26,782 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:45:26,782 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-03-17 18:45:26,782 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:45:26,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:45:26,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1614633780, now seen corresponding path program 1 times [2022-03-17 18:45:26,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:45:26,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007116959] [2022-03-17 18:45:26,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:45:26,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:45:26,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:26,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 18:45:26,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:26,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 18:45:26,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:45:26,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007116959] [2022-03-17 18:45:26,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007116959] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 18:45:26,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 18:45:26,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 18:45:26,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932535470] [2022-03-17 18:45:26,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 18:45:26,807 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 18:45:26,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:45:26,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 18:45:26,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 18:45:26,808 INFO L87 Difference]: Start difference. First operand 8073 states and 11015 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:26,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:45:26,866 INFO L93 Difference]: Finished difference Result 8203 states and 11016 transitions. [2022-03-17 18:45:26,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 18:45:26,867 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-03-17 18:45:26,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:45:26,876 INFO L225 Difference]: With dead ends: 8203 [2022-03-17 18:45:26,876 INFO L226 Difference]: Without dead ends: 8203 [2022-03-17 18:45:26,877 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 18:45:26,877 INFO L912 BasicCegarLoop]: 95 mSDtfsCounter, 137 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 102 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 [2022-03-17 18:45:26,877 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 102 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 18:45:26,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8203 states. [2022-03-17 18:45:26,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8203 to 8201. [2022-03-17 18:45:26,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8201 states, 8197 states have (on average 1.3434183237769917) internal successors, (11012), 8197 states have internal predecessors, (11012), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:26,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8201 states to 8201 states and 11015 transitions. [2022-03-17 18:45:26,978 INFO L78 Accepts]: Start accepts. Automaton has 8201 states and 11015 transitions. Word has length 30 [2022-03-17 18:45:26,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:45:26,979 INFO L478 AbstractCegarLoop]: Abstraction has 8201 states and 11015 transitions. [2022-03-17 18:45:26,979 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:26,979 INFO L276 IsEmpty]: Start isEmpty. Operand 8201 states and 11015 transitions. [2022-03-17 18:45:26,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-17 18:45:26,986 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:45:26,986 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:45:26,986 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-03-17 18:45:26,986 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:45:26,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:45:26,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1172781707, now seen corresponding path program 1 times [2022-03-17 18:45:26,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:45:26,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444098314] [2022-03-17 18:45:26,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:45:26,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:45:26,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:27,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 18:45:27,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:27,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 18:45:27,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:45:27,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444098314] [2022-03-17 18:45:27,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444098314] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 18:45:27,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 18:45:27,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 18:45:27,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847081170] [2022-03-17 18:45:27,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 18:45:27,011 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 18:45:27,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:45:27,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 18:45:27,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 18:45:27,012 INFO L87 Difference]: Start difference. First operand 8201 states and 11015 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:27,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:45:27,121 INFO L93 Difference]: Finished difference Result 13835 states and 18568 transitions. [2022-03-17 18:45:27,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 18:45:27,122 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-03-17 18:45:27,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:45:27,142 INFO L225 Difference]: With dead ends: 13835 [2022-03-17 18:45:27,142 INFO L226 Difference]: Without dead ends: 13835 [2022-03-17 18:45:27,142 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 18:45:27,143 INFO L912 BasicCegarLoop]: 69 mSDtfsCounter, 129 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 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 [2022-03-17 18:45:27,143 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 76 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 18:45:27,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13835 states. [2022-03-17 18:45:27,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13835 to 12297. [2022-03-17 18:45:27,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12297 states, 12293 states have (on average 1.3018791181973481) internal successors, (16004), 12293 states have internal predecessors, (16004), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:27,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12297 states to 12297 states and 16007 transitions. [2022-03-17 18:45:27,324 INFO L78 Accepts]: Start accepts. Automaton has 12297 states and 16007 transitions. Word has length 30 [2022-03-17 18:45:27,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:45:27,325 INFO L478 AbstractCegarLoop]: Abstraction has 12297 states and 16007 transitions. [2022-03-17 18:45:27,325 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:27,325 INFO L276 IsEmpty]: Start isEmpty. Operand 12297 states and 16007 transitions. [2022-03-17 18:45:27,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-17 18:45:27,338 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:45:27,338 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:45:27,338 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-03-17 18:45:27,338 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:45:27,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:45:27,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1678340332, now seen corresponding path program 1 times [2022-03-17 18:45:27,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:45:27,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883163844] [2022-03-17 18:45:27,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:45:27,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:45:27,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:27,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 18:45:27,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:27,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 18:45:27,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:45:27,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883163844] [2022-03-17 18:45:27,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883163844] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 18:45:27,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 18:45:27,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 18:45:27,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119089962] [2022-03-17 18:45:27,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 18:45:27,359 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 18:45:27,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:45:27,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 18:45:27,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 18:45:27,359 INFO L87 Difference]: Start difference. First operand 12297 states and 16007 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:27,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:45:27,435 INFO L93 Difference]: Finished difference Result 15883 states and 20232 transitions. [2022-03-17 18:45:27,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 18:45:27,435 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-03-17 18:45:27,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:45:27,459 INFO L225 Difference]: With dead ends: 15883 [2022-03-17 18:45:27,459 INFO L226 Difference]: Without dead ends: 15883 [2022-03-17 18:45:27,459 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 18:45:27,460 INFO L912 BasicCegarLoop]: 112 mSDtfsCounter, 115 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 119 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 [2022-03-17 18:45:27,463 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 119 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 18:45:27,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15883 states. [2022-03-17 18:45:27,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15883 to 15881. [2022-03-17 18:45:27,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15881 states, 15877 states have (on average 1.2740442149020597) internal successors, (20228), 15877 states have internal predecessors, (20228), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:27,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15881 states to 15881 states and 20231 transitions. [2022-03-17 18:45:27,665 INFO L78 Accepts]: Start accepts. Automaton has 15881 states and 20231 transitions. Word has length 30 [2022-03-17 18:45:27,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:45:27,665 INFO L478 AbstractCegarLoop]: Abstraction has 15881 states and 20231 transitions. [2022-03-17 18:45:27,665 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:27,665 INFO L276 IsEmpty]: Start isEmpty. Operand 15881 states and 20231 transitions. [2022-03-17 18:45:27,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-17 18:45:27,678 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:45:27,678 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:45:27,678 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-03-17 18:45:27,678 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:45:27,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:45:27,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1996461521, now seen corresponding path program 1 times [2022-03-17 18:45:27,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:45:27,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993089348] [2022-03-17 18:45:27,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:45:27,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:45:27,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:27,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 18:45:27,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:27,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 18:45:27,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:45:27,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993089348] [2022-03-17 18:45:27,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993089348] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 18:45:27,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 18:45:27,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 18:45:27,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353042420] [2022-03-17 18:45:27,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 18:45:27,701 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 18:45:27,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:45:27,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 18:45:27,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 18:45:27,702 INFO L87 Difference]: Start difference. First operand 15881 states and 20231 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:27,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:45:27,784 INFO L93 Difference]: Finished difference Result 16139 states and 20232 transitions. [2022-03-17 18:45:27,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 18:45:27,785 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-03-17 18:45:27,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:45:27,806 INFO L225 Difference]: With dead ends: 16139 [2022-03-17 18:45:27,806 INFO L226 Difference]: Without dead ends: 16139 [2022-03-17 18:45:27,806 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 18:45:27,806 INFO L912 BasicCegarLoop]: 92 mSDtfsCounter, 136 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 99 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 [2022-03-17 18:45:27,807 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 99 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 18:45:27,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16139 states. [2022-03-17 18:45:28,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16139 to 16137. [2022-03-17 18:45:28,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16137 states, 16133 states have (on average 1.2538275584206284) internal successors, (20228), 16133 states have internal predecessors, (20228), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:28,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16137 states to 16137 states and 20231 transitions. [2022-03-17 18:45:28,055 INFO L78 Accepts]: Start accepts. Automaton has 16137 states and 20231 transitions. Word has length 31 [2022-03-17 18:45:28,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:45:28,056 INFO L478 AbstractCegarLoop]: Abstraction has 16137 states and 20231 transitions. [2022-03-17 18:45:28,056 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:28,056 INFO L276 IsEmpty]: Start isEmpty. Operand 16137 states and 20231 transitions. [2022-03-17 18:45:28,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-17 18:45:28,068 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:45:28,068 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:45:28,068 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-03-17 18:45:28,069 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:45:28,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:45:28,069 INFO L85 PathProgramCache]: Analyzing trace with hash -488909712, now seen corresponding path program 1 times [2022-03-17 18:45:28,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:45:28,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606222394] [2022-03-17 18:45:28,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:45:28,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:45:28,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:28,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 18:45:28,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:28,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 18:45:28,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:45:28,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606222394] [2022-03-17 18:45:28,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606222394] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 18:45:28,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 18:45:28,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 18:45:28,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679556127] [2022-03-17 18:45:28,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 18:45:28,096 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 18:45:28,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:45:28,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 18:45:28,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 18:45:28,097 INFO L87 Difference]: Start difference. First operand 16137 states and 20231 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:28,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:45:28,190 INFO L93 Difference]: Finished difference Result 26635 states and 33032 transitions. [2022-03-17 18:45:28,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 18:45:28,190 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-03-17 18:45:28,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:45:28,307 INFO L225 Difference]: With dead ends: 26635 [2022-03-17 18:45:28,309 INFO L226 Difference]: Without dead ends: 26635 [2022-03-17 18:45:28,309 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 18:45:28,310 INFO L912 BasicCegarLoop]: 68 mSDtfsCounter, 122 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 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 [2022-03-17 18:45:28,310 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 75 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 18:45:28,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26635 states. [2022-03-17 18:45:28,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26635 to 24585. [2022-03-17 18:45:28,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24585 states, 24581 states have (on average 1.2186648224238232) internal successors, (29956), 24581 states have internal predecessors, (29956), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:28,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24585 states to 24585 states and 29959 transitions. [2022-03-17 18:45:28,613 INFO L78 Accepts]: Start accepts. Automaton has 24585 states and 29959 transitions. Word has length 31 [2022-03-17 18:45:28,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:45:28,614 INFO L478 AbstractCegarLoop]: Abstraction has 24585 states and 29959 transitions. [2022-03-17 18:45:28,614 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:28,614 INFO L276 IsEmpty]: Start isEmpty. Operand 24585 states and 29959 transitions. [2022-03-17 18:45:28,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-17 18:45:28,639 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:45:28,639 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:45:28,639 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-03-17 18:45:28,639 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:45:28,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:45:28,640 INFO L85 PathProgramCache]: Analyzing trace with hash -994468337, now seen corresponding path program 1 times [2022-03-17 18:45:28,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:45:28,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293545252] [2022-03-17 18:45:28,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:45:28,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:45:28,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:28,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 18:45:28,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:28,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 18:45:28,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:45:28,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293545252] [2022-03-17 18:45:28,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293545252] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 18:45:28,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 18:45:28,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 18:45:28,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889856217] [2022-03-17 18:45:28,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 18:45:28,659 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 18:45:28,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:45:28,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 18:45:28,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 18:45:28,659 INFO L87 Difference]: Start difference. First operand 24585 states and 29959 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:28,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:45:28,776 INFO L93 Difference]: Finished difference Result 31243 states and 36872 transitions. [2022-03-17 18:45:28,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 18:45:28,776 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-03-17 18:45:28,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:45:28,911 INFO L225 Difference]: With dead ends: 31243 [2022-03-17 18:45:28,912 INFO L226 Difference]: Without dead ends: 31243 [2022-03-17 18:45:28,912 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 18:45:28,912 INFO L912 BasicCegarLoop]: 114 mSDtfsCounter, 109 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 121 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 [2022-03-17 18:45:28,912 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 121 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 18:45:28,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31243 states. [2022-03-17 18:45:29,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31243 to 31241. [2022-03-17 18:45:29,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31241 states, 31237 states have (on average 1.1802669910682844) internal successors, (36868), 31237 states have internal predecessors, (36868), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:29,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31241 states to 31241 states and 36871 transitions. [2022-03-17 18:45:29,189 INFO L78 Accepts]: Start accepts. Automaton has 31241 states and 36871 transitions. Word has length 31 [2022-03-17 18:45:29,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:45:29,189 INFO L478 AbstractCegarLoop]: Abstraction has 31241 states and 36871 transitions. [2022-03-17 18:45:29,189 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:29,190 INFO L276 IsEmpty]: Start isEmpty. Operand 31241 states and 36871 transitions. [2022-03-17 18:45:29,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-17 18:45:29,202 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:45:29,202 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:45:29,202 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-03-17 18:45:29,203 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:45:29,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:45:29,203 INFO L85 PathProgramCache]: Analyzing trace with hash 2023701264, now seen corresponding path program 1 times [2022-03-17 18:45:29,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:45:29,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286573114] [2022-03-17 18:45:29,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:45:29,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:45:29,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:29,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 18:45:29,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:29,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 18:45:29,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:45:29,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286573114] [2022-03-17 18:45:29,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286573114] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 18:45:29,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 18:45:29,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 18:45:29,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869895876] [2022-03-17 18:45:29,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 18:45:29,221 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 18:45:29,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:45:29,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 18:45:29,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 18:45:29,221 INFO L87 Difference]: Start difference. First operand 31241 states and 36871 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:29,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:45:29,386 INFO L93 Difference]: Finished difference Result 31755 states and 36872 transitions. [2022-03-17 18:45:29,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 18:45:29,386 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-03-17 18:45:29,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:45:29,424 INFO L225 Difference]: With dead ends: 31755 [2022-03-17 18:45:29,424 INFO L226 Difference]: Without dead ends: 31755 [2022-03-17 18:45:29,424 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 18:45:29,425 INFO L912 BasicCegarLoop]: 89 mSDtfsCounter, 135 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 18:45:29,425 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 96 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 18:45:29,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31755 states. [2022-03-17 18:45:29,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31755 to 31753. [2022-03-17 18:45:29,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31753 states, 31749 states have (on average 1.1612334246747928) internal successors, (36868), 31749 states have internal predecessors, (36868), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:29,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31753 states to 31753 states and 36871 transitions. [2022-03-17 18:45:29,878 INFO L78 Accepts]: Start accepts. Automaton has 31753 states and 36871 transitions. Word has length 32 [2022-03-17 18:45:29,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:45:29,879 INFO L478 AbstractCegarLoop]: Abstraction has 31753 states and 36871 transitions. [2022-03-17 18:45:29,879 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:29,882 INFO L276 IsEmpty]: Start isEmpty. Operand 31753 states and 36871 transitions. [2022-03-17 18:45:29,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-17 18:45:29,895 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:45:29,895 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:45:29,895 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-03-17 18:45:29,895 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:45:29,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:45:29,896 INFO L85 PathProgramCache]: Analyzing trace with hash -763714223, now seen corresponding path program 1 times [2022-03-17 18:45:29,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:45:29,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303283697] [2022-03-17 18:45:29,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:45:29,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:45:29,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:29,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 18:45:29,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:29,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 18:45:29,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:45:29,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303283697] [2022-03-17 18:45:29,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303283697] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 18:45:29,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 18:45:29,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 18:45:29,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655231441] [2022-03-17 18:45:29,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 18:45:29,919 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 18:45:29,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:45:29,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 18:45:29,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 18:45:29,920 INFO L87 Difference]: Start difference. First operand 31753 states and 36871 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:30,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:45:30,057 INFO L93 Difference]: Finished difference Result 51209 states and 57863 transitions. [2022-03-17 18:45:30,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 18:45:30,058 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-03-17 18:45:30,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:45:30,145 INFO L225 Difference]: With dead ends: 51209 [2022-03-17 18:45:30,145 INFO L226 Difference]: Without dead ends: 51209 [2022-03-17 18:45:30,145 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 18:45:30,146 INFO L912 BasicCegarLoop]: 66 mSDtfsCounter, 114 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 73 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 [2022-03-17 18:45:30,146 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 73 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 18:45:30,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51209 states. [2022-03-17 18:45:30,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51209 to 49161. [2022-03-17 18:45:30,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49161 states, 49157 states have (on average 1.13538254978945) internal successors, (55812), 49157 states have internal predecessors, (55812), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:30,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49161 states to 49161 states and 55815 transitions. [2022-03-17 18:45:30,733 INFO L78 Accepts]: Start accepts. Automaton has 49161 states and 55815 transitions. Word has length 32 [2022-03-17 18:45:30,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:45:30,733 INFO L478 AbstractCegarLoop]: Abstraction has 49161 states and 55815 transitions. [2022-03-17 18:45:30,733 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:30,733 INFO L276 IsEmpty]: Start isEmpty. Operand 49161 states and 55815 transitions. [2022-03-17 18:45:30,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-17 18:45:30,763 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:45:30,763 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:45:30,763 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-03-17 18:45:30,763 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:45:30,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:45:30,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1269272848, now seen corresponding path program 1 times [2022-03-17 18:45:30,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:45:30,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340724734] [2022-03-17 18:45:30,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:45:30,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:45:30,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:30,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 18:45:30,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:45:30,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 18:45:30,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:45:30,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340724734] [2022-03-17 18:45:30,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340724734] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 18:45:30,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 18:45:30,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 18:45:30,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904684772] [2022-03-17 18:45:30,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 18:45:30,784 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 18:45:30,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:45:30,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 18:45:30,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 18:45:30,785 INFO L87 Difference]: Start difference. First operand 49161 states and 55815 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:31,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:45:31,128 INFO L93 Difference]: Finished difference Result 61447 states and 66566 transitions. [2022-03-17 18:45:31,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 18:45:31,129 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-03-17 18:45:31,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:45:31,129 INFO L225 Difference]: With dead ends: 61447 [2022-03-17 18:45:31,129 INFO L226 Difference]: Without dead ends: 0 [2022-03-17 18:45:31,129 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 18:45:31,129 INFO L912 BasicCegarLoop]: 115 mSDtfsCounter, 100 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 18:45:31,130 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 122 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 18:45:31,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-17 18:45:31,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-17 18:45:31,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-17 18:45:31,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-17 18:45:31,130 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 32 [2022-03-17 18:45:31,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:45:31,130 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-17 18:45:31,131 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:45:31,131 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-17 18:45:31,131 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-17 18:45:31,133 INFO L788 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-17 18:45:31,133 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-03-17 18:45:31,135 INFO L718 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, 1, 1] [2022-03-17 18:45:31,136 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-17 18:45:31,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 06:45:31 BasicIcfg [2022-03-17 18:45:31,138 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-17 18:45:31,138 INFO L158 Benchmark]: Toolchain (without parser) took 8404.64ms. Allocated memory was 218.1MB in the beginning and 3.3GB in the end (delta: 3.1GB). Free memory was 168.6MB in the beginning and 2.8GB in the end (delta: -2.7GB). Peak memory consumption was 443.8MB. Max. memory is 8.0GB. [2022-03-17 18:45:31,138 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 218.1MB. Free memory was 185.2MB in the beginning and 185.0MB in the end (delta: 151.8kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-17 18:45:31,138 INFO L158 Benchmark]: CACSL2BoogieTranslator took 316.20ms. Allocated memory is still 218.1MB. Free memory was 168.3MB in the beginning and 193.2MB in the end (delta: -25.0MB). Peak memory consumption was 11.8MB. Max. memory is 8.0GB. [2022-03-17 18:45:31,139 INFO L158 Benchmark]: Boogie Preprocessor took 20.22ms. Allocated memory is still 218.1MB. Free memory was 193.2MB in the beginning and 191.6MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-17 18:45:31,139 INFO L158 Benchmark]: RCFGBuilder took 259.87ms. Allocated memory is still 218.1MB. Free memory was 191.6MB in the beginning and 178.5MB in the end (delta: 13.1MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2022-03-17 18:45:31,139 INFO L158 Benchmark]: IcfgTransformer took 17.54ms. Allocated memory is still 218.1MB. Free memory was 178.5MB in the beginning and 177.0MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-17 18:45:31,139 INFO L158 Benchmark]: TraceAbstraction took 7786.02ms. Allocated memory was 218.1MB in the beginning and 3.3GB in the end (delta: 3.1GB). Free memory was 176.4MB in the beginning and 2.8GB in the end (delta: -2.6GB). Peak memory consumption was 451.9MB. Max. memory is 8.0GB. [2022-03-17 18:45:31,140 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 218.1MB. Free memory was 185.2MB in the beginning and 185.0MB in the end (delta: 151.8kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 316.20ms. Allocated memory is still 218.1MB. Free memory was 168.3MB in the beginning and 193.2MB in the end (delta: -25.0MB). Peak memory consumption was 11.8MB. Max. memory is 8.0GB. * Boogie Preprocessor took 20.22ms. Allocated memory is still 218.1MB. Free memory was 193.2MB in the beginning and 191.6MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 259.87ms. Allocated memory is still 218.1MB. Free memory was 191.6MB in the beginning and 178.5MB in the end (delta: 13.1MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * IcfgTransformer took 17.54ms. Allocated memory is still 218.1MB. Free memory was 178.5MB in the beginning and 177.0MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 7786.02ms. Allocated memory was 218.1MB in the beginning and 3.3GB in the end (delta: 3.1GB). Free memory was 176.4MB in the beginning and 2.8GB in the end (delta: -2.6GB). Peak memory consumption was 451.9MB. 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: 177]: 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, 48 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 7.8s, OverallIterations: 31, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.2s, AutomataDifference: 3.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4339 SdHoareTripleChecker+Valid, 1.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4339 mSDsluCounter, 3131 SdHoareTripleChecker+Invalid, 1.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 219 mSDsCounter, 73 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2036 IncrementalHoareTripleChecker+Invalid, 2109 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 73 mSolverCounterUnsat, 2912 mSDtfsCounter, 2036 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 217 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49161occurred in iteration=30, InterpolantAutomatonStates: 124, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.0s AutomataMinimizationTime, 31 MinimizatonAttempts, 8224 StatesRemovedByMinimization, 30 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 843 NumberOfCodeBlocks, 843 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 812 ConstructedInterpolants, 0 QuantifiedInterpolants, 1801 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 31 InterpolantComputations, 31 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! [2022-03-17 18:45:31,164 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...