/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/locks/test_locks_12.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 23:19:24,025 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 23:19:24,027 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 23:19:24,072 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 23:19:24,073 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 23:19:24,074 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 23:19:24,075 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 23:19:24,091 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 23:19:24,092 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 23:19:24,093 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 23:19:24,098 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 23:19:24,100 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 23:19:24,101 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 23:19:24,102 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 23:19:24,103 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 23:19:24,103 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 23:19:24,104 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 23:19:24,105 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 23:19:24,106 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 23:19:24,107 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 23:19:24,109 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 23:19:24,109 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 23:19:24,110 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 23:19:24,111 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 23:19:24,112 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 23:19:24,114 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 23:19:24,120 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 23:19:24,121 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 23:19:24,121 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 23:19:24,122 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-17 23:19:24,141 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 23:19:24,141 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 23:19:24,142 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-17 23:19:24,142 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-17 23:19:24,143 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-17 23:19:24,143 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-17 23:19:24,143 INFO L138 SettingsManager]: * Use SBE=true [2022-03-17 23:19:24,143 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 23:19:24,143 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 23:19:24,143 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 23:19:24,144 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 23:19:24,144 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 23:19:24,144 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 23:19:24,144 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 23:19:24,144 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 23:19:24,144 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 23:19:24,144 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 23:19:24,145 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 23:19:24,145 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 23:19:24,145 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 23:19:24,145 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 23:19:24,145 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-17 23:19:24,145 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-17 23:19:24,145 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 23:19:24,146 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-17 23:19:24,146 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-17 23:19:24,146 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-17 23:19:24,146 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-17 23:19:24,147 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 23:19:24,147 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 23:19:24,365 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 23:19:24,392 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 23:19:24,394 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 23:19:24,394 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 23:19:24,395 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 23:19:24,397 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_12.c [2022-03-17 23:19:24,449 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/adc89c21e/107fef0562374a87854e8334df77e4e1/FLAG1e8948891 [2022-03-17 23:19:24,856 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 23:19:24,856 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_12.c [2022-03-17 23:19:24,862 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/adc89c21e/107fef0562374a87854e8334df77e4e1/FLAG1e8948891 [2022-03-17 23:19:24,873 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/adc89c21e/107fef0562374a87854e8334df77e4e1 [2022-03-17 23:19:24,875 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 23:19:24,876 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 23:19:24,877 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 23:19:24,877 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 23:19:24,880 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 23:19:24,880 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 11:19:24" (1/1) ... [2022-03-17 23:19:24,881 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fdbab4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:19:24, skipping insertion in model container [2022-03-17 23:19:24,881 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 11:19:24" (1/1) ... [2022-03-17 23:19:24,887 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 23:19:24,904 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 23:19:25,062 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_12.c[4591,4604] [2022-03-17 23:19:25,068 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 23:19:25,077 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 23:19:25,100 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_12.c[4591,4604] [2022-03-17 23:19:25,101 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 23:19:25,112 INFO L208 MainTranslator]: Completed translation [2022-03-17 23:19:25,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:19:25 WrapperNode [2022-03-17 23:19:25,112 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 23:19:25,113 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 23:19:25,114 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 23:19:25,114 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 23:19:25,122 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:19:25" (1/1) ... [2022-03-17 23:19:25,122 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:19:25" (1/1) ... [2022-03-17 23:19:25,128 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:19:25" (1/1) ... [2022-03-17 23:19:25,128 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:19:25" (1/1) ... [2022-03-17 23:19:25,133 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:19:25" (1/1) ... [2022-03-17 23:19:25,137 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:19:25" (1/1) ... [2022-03-17 23:19:25,138 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:19:25" (1/1) ... [2022-03-17 23:19:25,140 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 23:19:25,141 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 23:19:25,141 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 23:19:25,141 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 23:19:25,146 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:19:25" (1/1) ... [2022-03-17 23:19:25,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 23:19:25,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 23:19:25,181 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 23:19:25,195 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 23:19:25,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 23:19:25,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 23:19:25,220 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 23:19:25,220 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 23:19:25,221 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 23:19:25,221 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 23:19:25,221 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 23:19:25,222 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 23:19:25,224 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-17 23:19:25,224 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 23:19:25,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 23:19:25,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 23:19:25,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 23:19:25,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 23:19:25,224 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 23:19:25,225 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 23:19:25,299 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 23:19:25,300 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 23:19:25,539 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 23:19:25,545 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 23:19:25,545 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-17 23:19:25,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 11:19:25 BoogieIcfgContainer [2022-03-17 23:19:25,547 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 23:19:25,548 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 23:19:25,548 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 23:19:25,549 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 23:19:25,551 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 11:19:25" (1/1) ... [2022-03-17 23:19:25,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 11:19:25 BasicIcfg [2022-03-17 23:19:25,597 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 23:19:25,598 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 23:19:25,598 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 23:19:25,601 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 23:19:25,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 11:19:24" (1/4) ... [2022-03-17 23:19:25,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@772be1a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 11:19:25, skipping insertion in model container [2022-03-17 23:19:25,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:19:25" (2/4) ... [2022-03-17 23:19:25,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@772be1a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 11:19:25, skipping insertion in model container [2022-03-17 23:19:25,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 11:19:25" (3/4) ... [2022-03-17 23:19:25,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@772be1a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 11:19:25, skipping insertion in model container [2022-03-17 23:19:25,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 11:19:25" (4/4) ... [2022-03-17 23:19:25,603 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_12.cqvasr [2022-03-17 23:19:25,610 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-17 23:19:25,611 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 23:19:25,667 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 23:19:25,674 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-17 23:19:25,674 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 23:19:25,698 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 46 states have internal predecessors, (85), 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 23:19:25,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-17 23:19:25,703 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:25,704 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 23:19:25,705 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:25,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:25,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1823990193, now seen corresponding path program 1 times [2022-03-17 23:19:25,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:25,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765193160] [2022-03-17 23:19:25,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:25,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:25,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:25,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:25,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:26,005 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 23:19:26,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:26,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765193160] [2022-03-17 23:19:26,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765193160] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:26,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:26,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:26,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302776644] [2022-03-17 23:19:26,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:26,013 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:26,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:26,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:26,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:26,042 INFO L87 Difference]: Start difference. First operand has 51 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 46 states have internal predecessors, (85), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 5.0) 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 23:19:26,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:26,261 INFO L93 Difference]: Finished difference Result 100 states and 175 transitions. [2022-03-17 23:19:26,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:26,263 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 23:19:26,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:26,276 INFO L225 Difference]: With dead ends: 100 [2022-03-17 23:19:26,276 INFO L226 Difference]: Without dead ends: 85 [2022-03-17 23:19:26,279 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 23:19:26,282 INFO L912 BasicCegarLoop]: 92 mSDtfsCounter, 208 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 23:19:26,283 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 101 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 23:19:26,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-03-17 23:19:26,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 59. [2022-03-17 23:19:26,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 55 states have (on average 1.8727272727272728) internal successors, (103), 55 states have internal predecessors, (103), 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 23:19:26,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 106 transitions. [2022-03-17 23:19:26,323 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 106 transitions. Word has length 23 [2022-03-17 23:19:26,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:26,324 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 106 transitions. [2022-03-17 23:19:26,324 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 23:19:26,324 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 106 transitions. [2022-03-17 23:19:26,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-17 23:19:26,325 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:26,325 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 23:19:26,326 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 23:19:26,326 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:26,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:26,327 INFO L85 PathProgramCache]: Analyzing trace with hash -316438384, now seen corresponding path program 1 times [2022-03-17 23:19:26,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:26,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478697746] [2022-03-17 23:19:26,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:26,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:26,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:26,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:26,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:26,399 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 23:19:26,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:26,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478697746] [2022-03-17 23:19:26,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478697746] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:26,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:26,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:26,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307747041] [2022-03-17 23:19:26,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:26,403 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:26,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:26,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:26,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:26,405 INFO L87 Difference]: Start difference. First operand 59 states and 106 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 23:19:26,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:26,527 INFO L93 Difference]: Finished difference Result 138 states and 253 transitions. [2022-03-17 23:19:26,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:26,528 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 23:19:26,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:26,531 INFO L225 Difference]: With dead ends: 138 [2022-03-17 23:19:26,531 INFO L226 Difference]: Without dead ends: 85 [2022-03-17 23:19:26,537 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 23:19:26,538 INFO L912 BasicCegarLoop]: 104 mSDtfsCounter, 178 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:19:26,539 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 111 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:19:26,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-03-17 23:19:26,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2022-03-17 23:19:26,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 79 states have (on average 1.860759493670886) internal successors, (147), 79 states have internal predecessors, (147), 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 23:19:26,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 150 transitions. [2022-03-17 23:19:26,551 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 150 transitions. Word has length 23 [2022-03-17 23:19:26,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:26,552 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 150 transitions. [2022-03-17 23:19:26,552 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 23:19:26,552 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 150 transitions. [2022-03-17 23:19:26,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-17 23:19:26,553 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:26,553 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 23:19:26,553 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-17 23:19:26,554 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:26,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:26,558 INFO L85 PathProgramCache]: Analyzing trace with hash -709089080, now seen corresponding path program 1 times [2022-03-17 23:19:26,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:26,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918177750] [2022-03-17 23:19:26,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:26,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:26,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:26,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:26,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:26,635 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 23:19:26,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:26,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918177750] [2022-03-17 23:19:26,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918177750] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:26,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:26,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:26,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480653613] [2022-03-17 23:19:26,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:26,637 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:26,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:26,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:26,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:26,638 INFO L87 Difference]: Start difference. First operand 83 states and 150 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 23:19:26,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:26,731 INFO L93 Difference]: Finished difference Result 127 states and 226 transitions. [2022-03-17 23:19:26,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:26,732 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 23:19:26,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:26,734 INFO L225 Difference]: With dead ends: 127 [2022-03-17 23:19:26,735 INFO L226 Difference]: Without dead ends: 88 [2022-03-17 23:19:26,735 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 23:19:26,741 INFO L912 BasicCegarLoop]: 126 mSDtfsCounter, 157 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:19:26,742 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 133 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:19:26,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-17 23:19:26,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2022-03-17 23:19:26,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 82 states have (on average 1.8170731707317074) internal successors, (149), 82 states have internal predecessors, (149), 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 23:19:26,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 152 transitions. [2022-03-17 23:19:26,757 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 152 transitions. Word has length 24 [2022-03-17 23:19:26,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:26,757 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 152 transitions. [2022-03-17 23:19:26,758 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 23:19:26,758 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 152 transitions. [2022-03-17 23:19:26,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-17 23:19:26,758 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:26,758 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 23:19:26,759 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-17 23:19:26,759 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:26,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:26,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1219623257, now seen corresponding path program 1 times [2022-03-17 23:19:26,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:26,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409329075] [2022-03-17 23:19:26,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:26,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:26,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:26,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:26,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:26,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 23:19:26,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:26,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409329075] [2022-03-17 23:19:26,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409329075] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:26,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:26,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:26,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784500345] [2022-03-17 23:19:26,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:26,846 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:26,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:26,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:26,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:26,847 INFO L87 Difference]: Start difference. First operand 86 states and 152 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 23:19:26,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:26,952 INFO L93 Difference]: Finished difference Result 161 states and 289 transitions. [2022-03-17 23:19:26,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:26,952 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 23:19:26,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:26,954 INFO L225 Difference]: With dead ends: 161 [2022-03-17 23:19:26,954 INFO L226 Difference]: Without dead ends: 159 [2022-03-17 23:19:26,955 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 23:19:26,961 INFO L912 BasicCegarLoop]: 82 mSDtfsCounter, 195 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:19:26,962 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 89 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:19:26,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-03-17 23:19:26,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 113. [2022-03-17 23:19:26,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 109 states have (on average 1.81651376146789) internal successors, (198), 109 states have internal predecessors, (198), 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 23:19:26,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 201 transitions. [2022-03-17 23:19:26,976 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 201 transitions. Word has length 24 [2022-03-17 23:19:26,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:26,977 INFO L478 AbstractCegarLoop]: Abstraction has 113 states and 201 transitions. [2022-03-17 23:19:26,977 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 23:19:26,977 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 201 transitions. [2022-03-17 23:19:26,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-17 23:19:26,978 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:26,978 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 23:19:26,978 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-17 23:19:26,978 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:26,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:26,979 INFO L85 PathProgramCache]: Analyzing trace with hash 287928552, now seen corresponding path program 1 times [2022-03-17 23:19:26,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:26,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528426573] [2022-03-17 23:19:26,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:26,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:27,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:27,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:27,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:27,047 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 23:19:27,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:27,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528426573] [2022-03-17 23:19:27,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528426573] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:27,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:27,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:27,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397410103] [2022-03-17 23:19:27,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:27,049 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:27,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:27,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:27,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:27,050 INFO L87 Difference]: Start difference. First operand 113 states and 201 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 23:19:27,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:27,136 INFO L93 Difference]: Finished difference Result 265 states and 479 transitions. [2022-03-17 23:19:27,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:27,137 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 23:19:27,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:27,138 INFO L225 Difference]: With dead ends: 265 [2022-03-17 23:19:27,138 INFO L226 Difference]: Without dead ends: 161 [2022-03-17 23:19:27,139 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 23:19:27,140 INFO L912 BasicCegarLoop]: 106 mSDtfsCounter, 172 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:19:27,140 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 113 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:19:27,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-03-17 23:19:27,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 159. [2022-03-17 23:19:27,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 155 states have (on average 1.8064516129032258) internal successors, (280), 155 states have internal predecessors, (280), 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 23:19:27,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 283 transitions. [2022-03-17 23:19:27,148 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 283 transitions. Word has length 24 [2022-03-17 23:19:27,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:27,149 INFO L478 AbstractCegarLoop]: Abstraction has 159 states and 283 transitions. [2022-03-17 23:19:27,149 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 23:19:27,149 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 283 transitions. [2022-03-17 23:19:27,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-17 23:19:27,150 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:27,150 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 23:19:27,150 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-17 23:19:27,150 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:27,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:27,151 INFO L85 PathProgramCache]: Analyzing trace with hash 846416876, now seen corresponding path program 1 times [2022-03-17 23:19:27,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:27,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112976965] [2022-03-17 23:19:27,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:27,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:27,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:27,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:27,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:27,199 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 23:19:27,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:27,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112976965] [2022-03-17 23:19:27,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112976965] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:27,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:27,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:27,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775026691] [2022-03-17 23:19:27,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:27,201 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:27,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:27,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:27,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:27,202 INFO L87 Difference]: Start difference. First operand 159 states and 283 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 23:19:27,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:27,281 INFO L93 Difference]: Finished difference Result 238 states and 422 transitions. [2022-03-17 23:19:27,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:27,282 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 23:19:27,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:27,283 INFO L225 Difference]: With dead ends: 238 [2022-03-17 23:19:27,283 INFO L226 Difference]: Without dead ends: 163 [2022-03-17 23:19:27,286 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 23:19:27,287 INFO L912 BasicCegarLoop]: 123 mSDtfsCounter, 156 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:19:27,288 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 130 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:19:27,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-03-17 23:19:27,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 161. [2022-03-17 23:19:27,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 157 states have (on average 1.78343949044586) internal successors, (280), 157 states have internal predecessors, (280), 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 23:19:27,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 283 transitions. [2022-03-17 23:19:27,297 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 283 transitions. Word has length 25 [2022-03-17 23:19:27,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:27,297 INFO L478 AbstractCegarLoop]: Abstraction has 161 states and 283 transitions. [2022-03-17 23:19:27,297 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 23:19:27,297 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 283 transitions. [2022-03-17 23:19:27,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-17 23:19:27,298 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:27,298 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 23:19:27,299 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-17 23:19:27,299 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:27,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:27,299 INFO L85 PathProgramCache]: Analyzing trace with hash 335882699, now seen corresponding path program 1 times [2022-03-17 23:19:27,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:27,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201575739] [2022-03-17 23:19:27,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:27,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:27,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:27,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:27,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:27,349 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 23:19:27,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:27,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201575739] [2022-03-17 23:19:27,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201575739] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:27,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:27,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:27,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118747311] [2022-03-17 23:19:27,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:27,351 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:27,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:27,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:27,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:27,351 INFO L87 Difference]: Start difference. First operand 161 states and 283 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 23:19:27,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:27,462 INFO L93 Difference]: Finished difference Result 301 states and 537 transitions. [2022-03-17 23:19:27,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:27,463 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 23:19:27,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:27,464 INFO L225 Difference]: With dead ends: 301 [2022-03-17 23:19:27,465 INFO L226 Difference]: Without dead ends: 299 [2022-03-17 23:19:27,465 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 23:19:27,465 INFO L912 BasicCegarLoop]: 81 mSDtfsCounter, 188 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:19:27,466 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 88 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:19:27,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-03-17 23:19:27,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 217. [2022-03-17 23:19:27,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 213 states have (on average 1.7652582159624413) internal successors, (376), 213 states have internal predecessors, (376), 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 23:19:27,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 379 transitions. [2022-03-17 23:19:27,473 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 379 transitions. Word has length 25 [2022-03-17 23:19:27,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:27,473 INFO L478 AbstractCegarLoop]: Abstraction has 217 states and 379 transitions. [2022-03-17 23:19:27,473 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 23:19:27,474 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 379 transitions. [2022-03-17 23:19:27,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-17 23:19:27,475 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:27,475 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 23:19:27,475 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-17 23:19:27,475 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:27,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:27,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1843434508, now seen corresponding path program 1 times [2022-03-17 23:19:27,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:27,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680890985] [2022-03-17 23:19:27,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:27,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:27,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:27,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:27,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:27,508 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 23:19:27,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:27,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680890985] [2022-03-17 23:19:27,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680890985] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:27,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:27,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:27,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944595112] [2022-03-17 23:19:27,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:27,509 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:27,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:27,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:27,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:27,510 INFO L87 Difference]: Start difference. First operand 217 states and 379 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 23:19:27,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:27,590 INFO L93 Difference]: Finished difference Result 513 states and 905 transitions. [2022-03-17 23:19:27,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:27,591 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 23:19:27,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:27,592 INFO L225 Difference]: With dead ends: 513 [2022-03-17 23:19:27,593 INFO L226 Difference]: Without dead ends: 307 [2022-03-17 23:19:27,593 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 23:19:27,594 INFO L912 BasicCegarLoop]: 108 mSDtfsCounter, 166 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:19:27,594 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 115 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:19:27,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-03-17 23:19:27,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 305. [2022-03-17 23:19:27,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 301 states have (on average 1.7541528239202657) internal successors, (528), 301 states have internal predecessors, (528), 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 23:19:27,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 531 transitions. [2022-03-17 23:19:27,603 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 531 transitions. Word has length 25 [2022-03-17 23:19:27,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:27,603 INFO L478 AbstractCegarLoop]: Abstraction has 305 states and 531 transitions. [2022-03-17 23:19:27,603 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 23:19:27,603 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 531 transitions. [2022-03-17 23:19:27,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-17 23:19:27,604 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:27,604 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 23:19:27,604 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-17 23:19:27,605 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:27,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:27,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1822461380, now seen corresponding path program 1 times [2022-03-17 23:19:27,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:27,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083254254] [2022-03-17 23:19:27,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:27,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:27,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:27,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:27,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:27,639 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 23:19:27,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:27,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083254254] [2022-03-17 23:19:27,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083254254] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:27,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:27,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:27,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368414973] [2022-03-17 23:19:27,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:27,641 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:27,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:27,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:27,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:27,641 INFO L87 Difference]: Start difference. First operand 305 states and 531 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 23:19:27,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:27,731 INFO L93 Difference]: Finished difference Result 457 states and 793 transitions. [2022-03-17 23:19:27,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:27,732 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 23:19:27,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:27,733 INFO L225 Difference]: With dead ends: 457 [2022-03-17 23:19:27,733 INFO L226 Difference]: Without dead ends: 311 [2022-03-17 23:19:27,734 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 23:19:27,734 INFO L912 BasicCegarLoop]: 120 mSDtfsCounter, 155 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:19:27,735 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 127 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:19:27,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-03-17 23:19:27,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 309. [2022-03-17 23:19:27,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 305 states have (on average 1.7311475409836066) internal successors, (528), 305 states have internal predecessors, (528), 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 23:19:27,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 531 transitions. [2022-03-17 23:19:27,743 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 531 transitions. Word has length 26 [2022-03-17 23:19:27,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:27,744 INFO L478 AbstractCegarLoop]: Abstraction has 309 states and 531 transitions. [2022-03-17 23:19:27,744 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 23:19:27,744 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 531 transitions. [2022-03-17 23:19:27,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-17 23:19:27,745 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:27,745 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 23:19:27,745 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-17 23:19:27,745 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:27,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:27,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1311927203, now seen corresponding path program 1 times [2022-03-17 23:19:27,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:27,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2927122] [2022-03-17 23:19:27,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:27,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:27,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:27,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:27,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:27,774 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 23:19:27,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:27,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2927122] [2022-03-17 23:19:27,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2927122] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:27,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:27,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:27,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353038130] [2022-03-17 23:19:27,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:27,775 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:27,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:27,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:27,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:27,776 INFO L87 Difference]: Start difference. First operand 309 states and 531 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 23:19:27,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:27,860 INFO L93 Difference]: Finished difference Result 573 states and 1001 transitions. [2022-03-17 23:19:27,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:27,861 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 23:19:27,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:27,863 INFO L225 Difference]: With dead ends: 573 [2022-03-17 23:19:27,863 INFO L226 Difference]: Without dead ends: 571 [2022-03-17 23:19:27,864 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 23:19:27,864 INFO L912 BasicCegarLoop]: 80 mSDtfsCounter, 181 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:19:27,865 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 87 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:19:27,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2022-03-17 23:19:27,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 425. [2022-03-17 23:19:27,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 421 states have (on average 1.700712589073634) internal successors, (716), 421 states have internal predecessors, (716), 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 23:19:27,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 719 transitions. [2022-03-17 23:19:27,877 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 719 transitions. Word has length 26 [2022-03-17 23:19:27,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:27,877 INFO L478 AbstractCegarLoop]: Abstraction has 425 states and 719 transitions. [2022-03-17 23:19:27,877 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 23:19:27,877 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 719 transitions. [2022-03-17 23:19:27,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-17 23:19:27,878 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:27,878 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 23:19:27,879 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-17 23:19:27,879 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:27,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:27,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1475488284, now seen corresponding path program 1 times [2022-03-17 23:19:27,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:27,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441735480] [2022-03-17 23:19:27,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:27,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:27,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:27,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:27,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:27,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 23:19:27,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:27,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441735480] [2022-03-17 23:19:27,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441735480] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:27,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:27,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:27,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911515702] [2022-03-17 23:19:27,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:27,910 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:27,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:27,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:27,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:27,911 INFO L87 Difference]: Start difference. First operand 425 states and 719 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 23:19:28,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:28,005 INFO L93 Difference]: Finished difference Result 1005 states and 1713 transitions. [2022-03-17 23:19:28,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:28,006 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 23:19:28,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:28,008 INFO L225 Difference]: With dead ends: 1005 [2022-03-17 23:19:28,008 INFO L226 Difference]: Without dead ends: 595 [2022-03-17 23:19:28,009 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 23:19:28,010 INFO L912 BasicCegarLoop]: 110 mSDtfsCounter, 160 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:19:28,010 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 117 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:19:28,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2022-03-17 23:19:28,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 593. [2022-03-17 23:19:28,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 589 states have (on average 1.6910016977928692) internal successors, (996), 589 states have internal predecessors, (996), 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 23:19:28,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 999 transitions. [2022-03-17 23:19:28,025 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 999 transitions. Word has length 26 [2022-03-17 23:19:28,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:28,025 INFO L478 AbstractCegarLoop]: Abstraction has 593 states and 999 transitions. [2022-03-17 23:19:28,026 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 23:19:28,026 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 999 transitions. [2022-03-17 23:19:28,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-17 23:19:28,026 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:28,027 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 23:19:28,027 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-17 23:19:28,027 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:28,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:28,027 INFO L85 PathProgramCache]: Analyzing trace with hash 2015070056, now seen corresponding path program 1 times [2022-03-17 23:19:28,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:28,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205872572] [2022-03-17 23:19:28,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:28,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:28,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:28,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:28,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:28,054 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 23:19:28,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:28,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205872572] [2022-03-17 23:19:28,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205872572] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:28,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:28,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:28,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004626564] [2022-03-17 23:19:28,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:28,055 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:28,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:28,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:28,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:28,056 INFO L87 Difference]: Start difference. First operand 593 states and 999 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 23:19:28,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:28,135 INFO L93 Difference]: Finished difference Result 889 states and 1493 transitions. [2022-03-17 23:19:28,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:28,135 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 23:19:28,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:28,137 INFO L225 Difference]: With dead ends: 889 [2022-03-17 23:19:28,137 INFO L226 Difference]: Without dead ends: 603 [2022-03-17 23:19:28,138 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 23:19:28,139 INFO L912 BasicCegarLoop]: 117 mSDtfsCounter, 154 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:19:28,139 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 124 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:19:28,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2022-03-17 23:19:28,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 601. [2022-03-17 23:19:28,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 597 states have (on average 1.6683417085427135) internal successors, (996), 597 states have internal predecessors, (996), 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 23:19:28,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 999 transitions. [2022-03-17 23:19:28,155 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 999 transitions. Word has length 27 [2022-03-17 23:19:28,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:28,155 INFO L478 AbstractCegarLoop]: Abstraction has 601 states and 999 transitions. [2022-03-17 23:19:28,155 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 23:19:28,155 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 999 transitions. [2022-03-17 23:19:28,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-17 23:19:28,156 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:28,156 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 23:19:28,156 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-17 23:19:28,156 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:28,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:28,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1504535879, now seen corresponding path program 1 times [2022-03-17 23:19:28,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:28,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91264037] [2022-03-17 23:19:28,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:28,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:28,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:28,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:28,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:28,181 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 23:19:28,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:28,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91264037] [2022-03-17 23:19:28,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91264037] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:28,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:28,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:28,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085881982] [2022-03-17 23:19:28,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:28,182 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:28,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:28,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:28,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:28,183 INFO L87 Difference]: Start difference. First operand 601 states and 999 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 23:19:28,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:28,259 INFO L93 Difference]: Finished difference Result 1101 states and 1865 transitions. [2022-03-17 23:19:28,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:28,259 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 23:19:28,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:28,263 INFO L225 Difference]: With dead ends: 1101 [2022-03-17 23:19:28,263 INFO L226 Difference]: Without dead ends: 1099 [2022-03-17 23:19:28,264 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 23:19:28,264 INFO L912 BasicCegarLoop]: 79 mSDtfsCounter, 174 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:19:28,265 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 86 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:19:28,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2022-03-17 23:19:28,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 841. [2022-03-17 23:19:28,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 837 states have (on average 1.6296296296296295) internal successors, (1364), 837 states have internal predecessors, (1364), 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 23:19:28,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1367 transitions. [2022-03-17 23:19:28,285 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1367 transitions. Word has length 27 [2022-03-17 23:19:28,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:28,285 INFO L478 AbstractCegarLoop]: Abstraction has 841 states and 1367 transitions. [2022-03-17 23:19:28,285 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 23:19:28,285 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1367 transitions. [2022-03-17 23:19:28,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-17 23:19:28,286 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:28,286 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 23:19:28,287 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-03-17 23:19:28,287 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:28,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:28,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1282879608, now seen corresponding path program 1 times [2022-03-17 23:19:28,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:28,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162947166] [2022-03-17 23:19:28,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:28,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:28,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:28,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:28,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:28,311 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 23:19:28,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:28,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162947166] [2022-03-17 23:19:28,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162947166] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:28,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:28,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:28,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433472281] [2022-03-17 23:19:28,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:28,312 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:28,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:28,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:28,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:28,313 INFO L87 Difference]: Start difference. First operand 841 states and 1367 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 23:19:28,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:28,404 INFO L93 Difference]: Finished difference Result 1981 states and 3241 transitions. [2022-03-17 23:19:28,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:28,404 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 23:19:28,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:28,408 INFO L225 Difference]: With dead ends: 1981 [2022-03-17 23:19:28,408 INFO L226 Difference]: Without dead ends: 1163 [2022-03-17 23:19:28,409 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 23:19:28,409 INFO L912 BasicCegarLoop]: 112 mSDtfsCounter, 154 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:19:28,410 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 119 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:19:28,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2022-03-17 23:19:28,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 1161. [2022-03-17 23:19:28,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1161 states, 1157 states have (on average 1.6214347450302506) internal successors, (1876), 1157 states have internal predecessors, (1876), 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 23:19:28,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1161 states to 1161 states and 1879 transitions. [2022-03-17 23:19:28,436 INFO L78 Accepts]: Start accepts. Automaton has 1161 states and 1879 transitions. Word has length 27 [2022-03-17 23:19:28,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:28,437 INFO L478 AbstractCegarLoop]: Abstraction has 1161 states and 1879 transitions. [2022-03-17 23:19:28,437 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 23:19:28,437 INFO L276 IsEmpty]: Start isEmpty. Operand 1161 states and 1879 transitions. [2022-03-17 23:19:28,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-17 23:19:28,438 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:28,438 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 23:19:28,438 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-03-17 23:19:28,438 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:28,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:28,439 INFO L85 PathProgramCache]: Analyzing trace with hash -603995456, now seen corresponding path program 1 times [2022-03-17 23:19:28,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:28,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946122630] [2022-03-17 23:19:28,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:28,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:28,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:28,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:28,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:28,465 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 23:19:28,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:28,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946122630] [2022-03-17 23:19:28,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946122630] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:28,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:28,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:28,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561130940] [2022-03-17 23:19:28,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:28,466 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:28,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:28,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:28,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:28,467 INFO L87 Difference]: Start difference. First operand 1161 states and 1879 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 23:19:28,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:28,550 INFO L93 Difference]: Finished difference Result 1741 states and 2809 transitions. [2022-03-17 23:19:28,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:28,550 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 23:19:28,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:28,554 INFO L225 Difference]: With dead ends: 1741 [2022-03-17 23:19:28,554 INFO L226 Difference]: Without dead ends: 1179 [2022-03-17 23:19:28,555 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 23:19:28,556 INFO L912 BasicCegarLoop]: 114 mSDtfsCounter, 153 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 121 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 23:19:28,556 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 121 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:19:28,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2022-03-17 23:19:28,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 1177. [2022-03-17 23:19:28,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1177 states, 1173 states have (on average 1.5993179880647912) internal successors, (1876), 1173 states have internal predecessors, (1876), 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 23:19:28,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 1879 transitions. [2022-03-17 23:19:28,583 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 1879 transitions. Word has length 28 [2022-03-17 23:19:28,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:28,583 INFO L478 AbstractCegarLoop]: Abstraction has 1177 states and 1879 transitions. [2022-03-17 23:19:28,583 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 23:19:28,584 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 1879 transitions. [2022-03-17 23:19:28,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-17 23:19:28,585 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:28,585 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 23:19:28,585 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-03-17 23:19:28,585 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:28,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:28,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1114529633, now seen corresponding path program 1 times [2022-03-17 23:19:28,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:28,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587773204] [2022-03-17 23:19:28,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:28,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:28,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:28,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:28,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:28,616 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 23:19:28,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:28,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587773204] [2022-03-17 23:19:28,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587773204] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:28,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:28,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:28,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424907904] [2022-03-17 23:19:28,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:28,617 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:28,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:28,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:28,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:28,617 INFO L87 Difference]: Start difference. First operand 1177 states and 1879 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 23:19:28,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:28,701 INFO L93 Difference]: Finished difference Result 2125 states and 3465 transitions. [2022-03-17 23:19:28,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:28,702 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 23:19:28,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:28,709 INFO L225 Difference]: With dead ends: 2125 [2022-03-17 23:19:28,709 INFO L226 Difference]: Without dead ends: 2123 [2022-03-17 23:19:28,709 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 23:19:28,710 INFO L912 BasicCegarLoop]: 78 mSDtfsCounter, 167 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:19:28,710 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 85 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:19:28,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2123 states. [2022-03-17 23:19:28,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2123 to 1673. [2022-03-17 23:19:28,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1673 states, 1669 states have (on average 1.555422408627921) internal successors, (2596), 1669 states have internal predecessors, (2596), 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 23:19:28,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1673 states to 1673 states and 2599 transitions. [2022-03-17 23:19:28,748 INFO L78 Accepts]: Start accepts. Automaton has 1673 states and 2599 transitions. Word has length 28 [2022-03-17 23:19:28,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:28,748 INFO L478 AbstractCegarLoop]: Abstraction has 1673 states and 2599 transitions. [2022-03-17 23:19:28,748 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 23:19:28,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1673 states and 2599 transitions. [2022-03-17 23:19:28,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-17 23:19:28,750 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:28,750 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 23:19:28,750 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-03-17 23:19:28,750 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:28,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:28,751 INFO L85 PathProgramCache]: Analyzing trace with hash 393022176, now seen corresponding path program 1 times [2022-03-17 23:19:28,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:28,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015229565] [2022-03-17 23:19:28,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:28,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:28,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:28,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:28,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:28,784 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 23:19:28,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:28,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015229565] [2022-03-17 23:19:28,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015229565] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:28,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:28,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:28,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649588845] [2022-03-17 23:19:28,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:28,785 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:28,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:28,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:28,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:28,786 INFO L87 Difference]: Start difference. First operand 1673 states and 2599 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 23:19:28,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:28,879 INFO L93 Difference]: Finished difference Result 3917 states and 6121 transitions. [2022-03-17 23:19:28,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:28,879 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 23:19:28,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:28,886 INFO L225 Difference]: With dead ends: 3917 [2022-03-17 23:19:28,886 INFO L226 Difference]: Without dead ends: 2283 [2022-03-17 23:19:28,891 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 23:19:28,892 INFO L912 BasicCegarLoop]: 114 mSDtfsCounter, 148 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:19:28,892 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 121 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:19:28,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2283 states. [2022-03-17 23:19:28,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2283 to 2281. [2022-03-17 23:19:28,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2281 states, 2277 states have (on average 1.5476504172156347) internal successors, (3524), 2277 states have internal predecessors, (3524), 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 23:19:28,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2281 states to 2281 states and 3527 transitions. [2022-03-17 23:19:28,954 INFO L78 Accepts]: Start accepts. Automaton has 2281 states and 3527 transitions. Word has length 28 [2022-03-17 23:19:28,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:28,954 INFO L478 AbstractCegarLoop]: Abstraction has 2281 states and 3527 transitions. [2022-03-17 23:19:28,954 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 23:19:28,955 INFO L276 IsEmpty]: Start isEmpty. Operand 2281 states and 3527 transitions. [2022-03-17 23:19:28,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-17 23:19:28,957 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:28,957 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 23:19:28,957 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-03-17 23:19:28,957 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:28,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:28,958 INFO L85 PathProgramCache]: Analyzing trace with hash -190647580, now seen corresponding path program 1 times [2022-03-17 23:19:28,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:28,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265711250] [2022-03-17 23:19:28,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:28,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:28,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:28,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:28,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:28,993 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 23:19:28,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:28,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265711250] [2022-03-17 23:19:28,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265711250] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:28,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:28,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:28,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716473827] [2022-03-17 23:19:28,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:28,994 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:28,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:28,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:28,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:28,995 INFO L87 Difference]: Start difference. First operand 2281 states and 3527 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 23:19:29,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:29,116 INFO L93 Difference]: Finished difference Result 3421 states and 5273 transitions. [2022-03-17 23:19:29,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:29,116 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 23:19:29,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:29,123 INFO L225 Difference]: With dead ends: 3421 [2022-03-17 23:19:29,123 INFO L226 Difference]: Without dead ends: 2315 [2022-03-17 23:19:29,125 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 23:19:29,126 INFO L912 BasicCegarLoop]: 111 mSDtfsCounter, 152 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 118 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 23:19:29,126 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 118 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:19:29,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2315 states. [2022-03-17 23:19:29,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2315 to 2313. [2022-03-17 23:19:29,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2313 states, 2309 states have (on average 1.5262018189692508) internal successors, (3524), 2309 states have internal predecessors, (3524), 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 23:19:29,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2313 states to 2313 states and 3527 transitions. [2022-03-17 23:19:29,177 INFO L78 Accepts]: Start accepts. Automaton has 2313 states and 3527 transitions. Word has length 29 [2022-03-17 23:19:29,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:29,177 INFO L478 AbstractCegarLoop]: Abstraction has 2313 states and 3527 transitions. [2022-03-17 23:19:29,177 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 23:19:29,177 INFO L276 IsEmpty]: Start isEmpty. Operand 2313 states and 3527 transitions. [2022-03-17 23:19:29,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-17 23:19:29,179 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:29,179 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 23:19:29,179 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-03-17 23:19:29,179 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:29,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:29,180 INFO L85 PathProgramCache]: Analyzing trace with hash -701181757, now seen corresponding path program 1 times [2022-03-17 23:19:29,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:29,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279731448] [2022-03-17 23:19:29,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:29,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:29,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:29,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:29,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:29,227 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 23:19:29,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:29,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279731448] [2022-03-17 23:19:29,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279731448] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:29,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:29,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:29,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961122199] [2022-03-17 23:19:29,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:29,228 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:29,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:29,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:29,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:29,229 INFO L87 Difference]: Start difference. First operand 2313 states and 3527 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 23:19:29,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:29,328 INFO L93 Difference]: Finished difference Result 4109 states and 6409 transitions. [2022-03-17 23:19:29,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:29,329 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 23:19:29,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:29,342 INFO L225 Difference]: With dead ends: 4109 [2022-03-17 23:19:29,342 INFO L226 Difference]: Without dead ends: 4107 [2022-03-17 23:19:29,343 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 23:19:29,344 INFO L912 BasicCegarLoop]: 77 mSDtfsCounter, 160 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:19:29,344 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 84 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:19:29,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4107 states. [2022-03-17 23:19:29,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4107 to 3337. [2022-03-17 23:19:29,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3337 states, 3333 states have (on average 1.4797479747974798) internal successors, (4932), 3333 states have internal predecessors, (4932), 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 23:19:29,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3337 states to 3337 states and 4935 transitions. [2022-03-17 23:19:29,416 INFO L78 Accepts]: Start accepts. Automaton has 3337 states and 4935 transitions. Word has length 29 [2022-03-17 23:19:29,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:29,416 INFO L478 AbstractCegarLoop]: Abstraction has 3337 states and 4935 transitions. [2022-03-17 23:19:29,416 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 23:19:29,417 INFO L276 IsEmpty]: Start isEmpty. Operand 3337 states and 4935 transitions. [2022-03-17 23:19:29,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-17 23:19:29,420 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:29,420 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 23:19:29,421 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-03-17 23:19:29,421 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:29,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:29,421 INFO L85 PathProgramCache]: Analyzing trace with hash 806370052, now seen corresponding path program 1 times [2022-03-17 23:19:29,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:29,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811381771] [2022-03-17 23:19:29,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:29,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:29,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:29,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:29,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:29,445 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 23:19:29,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:29,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811381771] [2022-03-17 23:19:29,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811381771] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:29,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:29,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:29,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421295229] [2022-03-17 23:19:29,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:29,446 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:29,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:29,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:29,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:29,447 INFO L87 Difference]: Start difference. First operand 3337 states and 4935 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 23:19:29,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:29,582 INFO L93 Difference]: Finished difference Result 7757 states and 11529 transitions. [2022-03-17 23:19:29,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:29,583 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 23:19:29,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:29,596 INFO L225 Difference]: With dead ends: 7757 [2022-03-17 23:19:29,596 INFO L226 Difference]: Without dead ends: 4491 [2022-03-17 23:19:29,600 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 23:19:29,601 INFO L912 BasicCegarLoop]: 116 mSDtfsCounter, 142 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 123 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 23:19:29,601 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 123 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:19:29,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4491 states. [2022-03-17 23:19:29,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4491 to 4489. [2022-03-17 23:19:29,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4489 states, 4485 states have (on average 1.470680044593088) internal successors, (6596), 4485 states have internal predecessors, (6596), 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 23:19:29,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4489 states to 4489 states and 6599 transitions. [2022-03-17 23:19:29,714 INFO L78 Accepts]: Start accepts. Automaton has 4489 states and 6599 transitions. Word has length 29 [2022-03-17 23:19:29,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:29,714 INFO L478 AbstractCegarLoop]: Abstraction has 4489 states and 6599 transitions. [2022-03-17 23:19:29,714 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 23:19:29,714 INFO L276 IsEmpty]: Start isEmpty. Operand 4489 states and 6599 transitions. [2022-03-17 23:19:29,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-17 23:19:29,718 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:29,718 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 23:19:29,719 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-03-17 23:19:29,719 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:29,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:29,719 INFO L85 PathProgramCache]: Analyzing trace with hash -261765188, now seen corresponding path program 1 times [2022-03-17 23:19:29,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:29,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876012067] [2022-03-17 23:19:29,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:29,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:29,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:29,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:29,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:29,745 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 23:19:29,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:29,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876012067] [2022-03-17 23:19:29,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876012067] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:29,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:29,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:29,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473148015] [2022-03-17 23:19:29,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:29,746 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:29,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:29,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:29,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:29,747 INFO L87 Difference]: Start difference. First operand 4489 states and 6599 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 23:19:29,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:29,856 INFO L93 Difference]: Finished difference Result 6733 states and 9865 transitions. [2022-03-17 23:19:29,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:29,857 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 23:19:29,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:29,880 INFO L225 Difference]: With dead ends: 6733 [2022-03-17 23:19:29,881 INFO L226 Difference]: Without dead ends: 4555 [2022-03-17 23:19:29,885 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 23:19:29,885 INFO L912 BasicCegarLoop]: 108 mSDtfsCounter, 151 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 115 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 23:19:29,885 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 115 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:19:29,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4555 states. [2022-03-17 23:19:29,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4555 to 4553. [2022-03-17 23:19:29,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4553 states, 4549 states have (on average 1.449989008573313) internal successors, (6596), 4549 states have internal predecessors, (6596), 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 23:19:30,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4553 states to 4553 states and 6599 transitions. [2022-03-17 23:19:30,009 INFO L78 Accepts]: Start accepts. Automaton has 4553 states and 6599 transitions. Word has length 30 [2022-03-17 23:19:30,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:30,009 INFO L478 AbstractCegarLoop]: Abstraction has 4553 states and 6599 transitions. [2022-03-17 23:19:30,010 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 23:19:30,010 INFO L276 IsEmpty]: Start isEmpty. Operand 4553 states and 6599 transitions. [2022-03-17 23:19:30,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-17 23:19:30,015 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:30,015 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 23:19:30,015 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-03-17 23:19:30,015 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:30,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:30,016 INFO L85 PathProgramCache]: Analyzing trace with hash -772299365, now seen corresponding path program 1 times [2022-03-17 23:19:30,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:30,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956483612] [2022-03-17 23:19:30,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:30,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:30,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:30,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:30,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:30,044 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 23:19:30,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:30,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956483612] [2022-03-17 23:19:30,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956483612] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:30,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:30,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:30,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943313803] [2022-03-17 23:19:30,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:30,045 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:30,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:30,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:30,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:30,046 INFO L87 Difference]: Start difference. First operand 4553 states and 6599 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 23:19:30,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:30,198 INFO L93 Difference]: Finished difference Result 7949 states and 11785 transitions. [2022-03-17 23:19:30,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:30,198 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 23:19:30,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:30,211 INFO L225 Difference]: With dead ends: 7949 [2022-03-17 23:19:30,211 INFO L226 Difference]: Without dead ends: 7947 [2022-03-17 23:19:30,213 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 23:19:30,214 INFO L912 BasicCegarLoop]: 76 mSDtfsCounter, 153 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 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 23:19:30,214 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [153 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 23:19:30,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7947 states. [2022-03-17 23:19:30,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7947 to 6665. [2022-03-17 23:19:30,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6665 states, 6661 states have (on average 1.4033928839513587) internal successors, (9348), 6661 states have internal predecessors, (9348), 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 23:19:30,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6665 states to 6665 states and 9351 transitions. [2022-03-17 23:19:30,346 INFO L78 Accepts]: Start accepts. Automaton has 6665 states and 9351 transitions. Word has length 30 [2022-03-17 23:19:30,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:30,346 INFO L478 AbstractCegarLoop]: Abstraction has 6665 states and 9351 transitions. [2022-03-17 23:19:30,346 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 23:19:30,346 INFO L276 IsEmpty]: Start isEmpty. Operand 6665 states and 9351 transitions. [2022-03-17 23:19:30,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-17 23:19:30,353 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:30,354 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 23:19:30,354 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-03-17 23:19:30,354 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:30,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:30,354 INFO L85 PathProgramCache]: Analyzing trace with hash 735252444, now seen corresponding path program 1 times [2022-03-17 23:19:30,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:30,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723216382] [2022-03-17 23:19:30,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:30,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:30,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:30,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:30,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:30,379 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 23:19:30,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:30,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723216382] [2022-03-17 23:19:30,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723216382] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:30,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:30,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:30,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384936592] [2022-03-17 23:19:30,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:30,382 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:30,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:30,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:30,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:30,382 INFO L87 Difference]: Start difference. First operand 6665 states and 9351 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 23:19:30,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:30,538 INFO L93 Difference]: Finished difference Result 15373 states and 21641 transitions. [2022-03-17 23:19:30,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:30,539 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-03-17 23:19:30,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:30,554 INFO L225 Difference]: With dead ends: 15373 [2022-03-17 23:19:30,554 INFO L226 Difference]: Without dead ends: 8843 [2022-03-17 23:19:30,568 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 23:19:30,569 INFO L912 BasicCegarLoop]: 118 mSDtfsCounter, 136 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 125 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 23:19:30,569 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 125 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:19:30,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8843 states. [2022-03-17 23:19:30,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8843 to 8841. [2022-03-17 23:19:30,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8841 states, 8837 states have (on average 1.3909697861265136) internal successors, (12292), 8837 states have internal predecessors, (12292), 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 23:19:30,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8841 states to 8841 states and 12295 transitions. [2022-03-17 23:19:30,773 INFO L78 Accepts]: Start accepts. Automaton has 8841 states and 12295 transitions. Word has length 30 [2022-03-17 23:19:30,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:30,773 INFO L478 AbstractCegarLoop]: Abstraction has 8841 states and 12295 transitions. [2022-03-17 23:19:30,774 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 23:19:30,774 INFO L276 IsEmpty]: Start isEmpty. Operand 8841 states and 12295 transitions. [2022-03-17 23:19:30,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-17 23:19:30,782 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:30,782 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, 1] [2022-03-17 23:19:30,782 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-03-17 23:19:30,782 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:30,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:30,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1828556384, now seen corresponding path program 1 times [2022-03-17 23:19:30,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:30,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163707301] [2022-03-17 23:19:30,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:30,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:30,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:30,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:30,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:30,808 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 23:19:30,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:30,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163707301] [2022-03-17 23:19:30,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163707301] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:30,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:30,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:30,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244463371] [2022-03-17 23:19:30,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:30,809 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:30,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:30,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:30,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:30,810 INFO L87 Difference]: Start difference. First operand 8841 states and 12295 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 23:19:30,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:30,951 INFO L93 Difference]: Finished difference Result 13261 states and 18377 transitions. [2022-03-17 23:19:30,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:30,952 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 23:19:30,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:30,966 INFO L225 Difference]: With dead ends: 13261 [2022-03-17 23:19:30,967 INFO L226 Difference]: Without dead ends: 8971 [2022-03-17 23:19:30,975 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 23:19:30,976 INFO L912 BasicCegarLoop]: 105 mSDtfsCounter, 150 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 112 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 23:19:30,977 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 112 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:19:30,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8971 states. [2022-03-17 23:19:31,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8971 to 8969. [2022-03-17 23:19:31,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8969 states, 8965 states have (on average 1.3711098717233687) internal successors, (12292), 8965 states have internal predecessors, (12292), 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 23:19:31,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8969 states to 8969 states and 12295 transitions. [2022-03-17 23:19:31,171 INFO L78 Accepts]: Start accepts. Automaton has 8969 states and 12295 transitions. Word has length 31 [2022-03-17 23:19:31,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:31,172 INFO L478 AbstractCegarLoop]: Abstraction has 8969 states and 12295 transitions. [2022-03-17 23:19:31,172 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 23:19:31,172 INFO L276 IsEmpty]: Start isEmpty. Operand 8969 states and 12295 transitions. [2022-03-17 23:19:31,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-17 23:19:31,180 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:31,180 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 23:19:31,180 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-03-17 23:19:31,180 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:31,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:31,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1318022207, now seen corresponding path program 1 times [2022-03-17 23:19:31,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:31,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315097632] [2022-03-17 23:19:31,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:31,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:31,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:31,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:31,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:31,205 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 23:19:31,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:31,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315097632] [2022-03-17 23:19:31,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315097632] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:31,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:31,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:31,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004506258] [2022-03-17 23:19:31,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:31,206 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:31,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:31,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:31,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:31,207 INFO L87 Difference]: Start difference. First operand 8969 states and 12295 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 23:19:31,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:31,441 INFO L93 Difference]: Finished difference Result 15373 states and 21513 transitions. [2022-03-17 23:19:31,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:31,442 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 23:19:31,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:31,466 INFO L225 Difference]: With dead ends: 15373 [2022-03-17 23:19:31,466 INFO L226 Difference]: Without dead ends: 15371 [2022-03-17 23:19:31,469 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 23:19:31,470 INFO L912 BasicCegarLoop]: 75 mSDtfsCounter, 146 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 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 23:19:31,473 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [146 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 23:19:31,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15371 states. [2022-03-17 23:19:31,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15371 to 13321. [2022-03-17 23:19:31,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13321 states, 13317 states have (on average 1.326725238417061) internal successors, (17668), 13317 states have internal predecessors, (17668), 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 23:19:31,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13321 states to 13321 states and 17671 transitions. [2022-03-17 23:19:31,741 INFO L78 Accepts]: Start accepts. Automaton has 13321 states and 17671 transitions. Word has length 31 [2022-03-17 23:19:31,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:31,741 INFO L478 AbstractCegarLoop]: Abstraction has 13321 states and 17671 transitions. [2022-03-17 23:19:31,742 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 23:19:31,742 INFO L276 IsEmpty]: Start isEmpty. Operand 13321 states and 17671 transitions. [2022-03-17 23:19:31,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-17 23:19:31,757 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:31,757 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 23:19:31,757 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-03-17 23:19:31,757 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:31,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:31,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1469393280, now seen corresponding path program 1 times [2022-03-17 23:19:31,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:31,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836011635] [2022-03-17 23:19:31,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:31,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:31,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:31,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:31,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:31,780 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 23:19:31,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:31,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836011635] [2022-03-17 23:19:31,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836011635] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:31,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:31,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:31,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593048335] [2022-03-17 23:19:31,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:31,781 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:31,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:31,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:31,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:31,782 INFO L87 Difference]: Start difference. First operand 13321 states and 17671 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 23:19:32,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:32,068 INFO L93 Difference]: Finished difference Result 30477 states and 40457 transitions. [2022-03-17 23:19:32,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:32,069 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 23:19:32,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:32,098 INFO L225 Difference]: With dead ends: 30477 [2022-03-17 23:19:32,098 INFO L226 Difference]: Without dead ends: 17419 [2022-03-17 23:19:32,118 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 23:19:32,118 INFO L912 BasicCegarLoop]: 120 mSDtfsCounter, 130 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 127 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 23:19:32,119 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 127 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:19:32,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17419 states. [2022-03-17 23:19:32,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17419 to 17417. [2022-03-17 23:19:32,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17417 states, 17413 states have (on average 1.3086774249124218) internal successors, (22788), 17413 states have internal predecessors, (22788), 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 23:19:32,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17417 states to 17417 states and 22791 transitions. [2022-03-17 23:19:32,484 INFO L78 Accepts]: Start accepts. Automaton has 17417 states and 22791 transitions. Word has length 31 [2022-03-17 23:19:32,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:32,485 INFO L478 AbstractCegarLoop]: Abstraction has 17417 states and 22791 transitions. [2022-03-17 23:19:32,485 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 23:19:32,485 INFO L276 IsEmpty]: Start isEmpty. Operand 17417 states and 22791 transitions. [2022-03-17 23:19:32,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-17 23:19:32,500 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:32,501 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 23:19:32,501 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-03-17 23:19:32,501 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:32,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:32,501 INFO L85 PathProgramCache]: Analyzing trace with hash -2090951496, now seen corresponding path program 1 times [2022-03-17 23:19:32,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:32,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746989053] [2022-03-17 23:19:32,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:32,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:32,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:32,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:32,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:32,523 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 23:19:32,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:32,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746989053] [2022-03-17 23:19:32,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746989053] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:32,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:32,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:32,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177640959] [2022-03-17 23:19:32,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:32,524 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:32,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:32,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:32,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:32,525 INFO L87 Difference]: Start difference. First operand 17417 states and 22791 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 23:19:32,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:32,755 INFO L93 Difference]: Finished difference Result 26125 states and 34057 transitions. [2022-03-17 23:19:32,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:32,756 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 23:19:32,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:32,787 INFO L225 Difference]: With dead ends: 26125 [2022-03-17 23:19:32,787 INFO L226 Difference]: Without dead ends: 17675 [2022-03-17 23:19:32,806 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 23:19:32,808 INFO L912 BasicCegarLoop]: 102 mSDtfsCounter, 149 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:19:32,808 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 109 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:19:32,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17675 states. [2022-03-17 23:19:33,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17675 to 17673. [2022-03-17 23:19:33,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17673 states, 17669 states have (on average 1.2897164525440037) internal successors, (22788), 17669 states have internal predecessors, (22788), 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 23:19:33,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17673 states to 17673 states and 22791 transitions. [2022-03-17 23:19:33,210 INFO L78 Accepts]: Start accepts. Automaton has 17673 states and 22791 transitions. Word has length 32 [2022-03-17 23:19:33,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:33,211 INFO L478 AbstractCegarLoop]: Abstraction has 17673 states and 22791 transitions. [2022-03-17 23:19:33,211 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 23:19:33,211 INFO L276 IsEmpty]: Start isEmpty. Operand 17673 states and 22791 transitions. [2022-03-17 23:19:33,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-17 23:19:33,229 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:33,229 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 23:19:33,230 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-03-17 23:19:33,230 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:33,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:33,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1693481623, now seen corresponding path program 1 times [2022-03-17 23:19:33,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:33,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913036420] [2022-03-17 23:19:33,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:33,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:33,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:33,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:33,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:33,250 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 23:19:33,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:33,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913036420] [2022-03-17 23:19:33,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913036420] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:33,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:33,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:33,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522977575] [2022-03-17 23:19:33,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:33,251 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:33,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:33,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:33,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:33,252 INFO L87 Difference]: Start difference. First operand 17673 states and 22791 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 23:19:33,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:33,702 INFO L93 Difference]: Finished difference Result 29709 states and 38921 transitions. [2022-03-17 23:19:33,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:33,702 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 23:19:33,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:33,757 INFO L225 Difference]: With dead ends: 29709 [2022-03-17 23:19:33,757 INFO L226 Difference]: Without dead ends: 29707 [2022-03-17 23:19:33,768 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 23:19:33,769 INFO L912 BasicCegarLoop]: 74 mSDtfsCounter, 139 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 81 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 23:19:33,769 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 81 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:19:33,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29707 states. [2022-03-17 23:19:34,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29707 to 26633. [2022-03-17 23:19:34,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26633 states, 26629 states have (on average 1.249915505651733) internal successors, (33284), 26629 states have internal predecessors, (33284), 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 23:19:34,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26633 states to 26633 states and 33287 transitions. [2022-03-17 23:19:34,257 INFO L78 Accepts]: Start accepts. Automaton has 26633 states and 33287 transitions. Word has length 32 [2022-03-17 23:19:34,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:34,257 INFO L478 AbstractCegarLoop]: Abstraction has 26633 states and 33287 transitions. [2022-03-17 23:19:34,257 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 23:19:34,257 INFO L276 IsEmpty]: Start isEmpty. Operand 26633 states and 33287 transitions. [2022-03-17 23:19:34,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-17 23:19:34,281 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:34,281 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 23:19:34,281 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-03-17 23:19:34,281 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:34,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:34,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1093933864, now seen corresponding path program 1 times [2022-03-17 23:19:34,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:34,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186766425] [2022-03-17 23:19:34,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:34,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:34,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:34,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:34,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:34,303 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 23:19:34,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:34,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186766425] [2022-03-17 23:19:34,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186766425] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:34,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:34,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:34,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910723929] [2022-03-17 23:19:34,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:34,304 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:34,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:34,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:34,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:34,305 INFO L87 Difference]: Start difference. First operand 26633 states and 33287 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 23:19:34,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:34,794 INFO L93 Difference]: Finished difference Result 60429 states and 75273 transitions. [2022-03-17 23:19:34,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:34,794 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 23:19:34,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:34,835 INFO L225 Difference]: With dead ends: 60429 [2022-03-17 23:19:34,835 INFO L226 Difference]: Without dead ends: 34315 [2022-03-17 23:19:34,871 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 23:19:34,872 INFO L912 BasicCegarLoop]: 122 mSDtfsCounter, 124 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:19:34,872 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 129 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:19:34,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34315 states. [2022-03-17 23:19:35,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34315 to 34313. [2022-03-17 23:19:35,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34313 states, 34309 states have (on average 1.2238188230493456) internal successors, (41988), 34309 states have internal predecessors, (41988), 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 23:19:35,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34313 states to 34313 states and 41991 transitions. [2022-03-17 23:19:35,601 INFO L78 Accepts]: Start accepts. Automaton has 34313 states and 41991 transitions. Word has length 32 [2022-03-17 23:19:35,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:35,601 INFO L478 AbstractCegarLoop]: Abstraction has 34313 states and 41991 transitions. [2022-03-17 23:19:35,601 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 23:19:35,601 INFO L276 IsEmpty]: Start isEmpty. Operand 34313 states and 41991 transitions. [2022-03-17 23:19:35,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-17 23:19:35,625 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:35,625 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, 1] [2022-03-17 23:19:35,626 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-03-17 23:19:35,626 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:35,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:35,626 INFO L85 PathProgramCache]: Analyzing trace with hash 958355932, now seen corresponding path program 1 times [2022-03-17 23:19:35,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:35,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184443854] [2022-03-17 23:19:35,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:35,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:35,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:35,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:35,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:35,650 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 23:19:35,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:35,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184443854] [2022-03-17 23:19:35,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184443854] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:35,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:35,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:35,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102804148] [2022-03-17 23:19:35,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:35,651 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:35,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:35,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:35,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:35,652 INFO L87 Difference]: Start difference. First operand 34313 states and 41991 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:36,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:36,211 INFO L93 Difference]: Finished difference Result 51469 states and 62729 transitions. [2022-03-17 23:19:36,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:36,212 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-03-17 23:19:36,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:36,253 INFO L225 Difference]: With dead ends: 51469 [2022-03-17 23:19:36,254 INFO L226 Difference]: Without dead ends: 34827 [2022-03-17 23:19:36,271 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 23:19:36,272 INFO L912 BasicCegarLoop]: 99 mSDtfsCounter, 148 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:19:36,272 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 106 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:19:36,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34827 states. [2022-03-17 23:19:36,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34827 to 34825. [2022-03-17 23:19:36,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34825 states, 34821 states have (on average 1.2058240716808821) internal successors, (41988), 34821 states have internal predecessors, (41988), 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 23:19:36,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34825 states to 34825 states and 41991 transitions. [2022-03-17 23:19:36,879 INFO L78 Accepts]: Start accepts. Automaton has 34825 states and 41991 transitions. Word has length 33 [2022-03-17 23:19:36,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:36,880 INFO L478 AbstractCegarLoop]: Abstraction has 34825 states and 41991 transitions. [2022-03-17 23:19:36,880 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:36,880 INFO L276 IsEmpty]: Start isEmpty. Operand 34825 states and 41991 transitions. [2022-03-17 23:19:36,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-17 23:19:36,900 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:36,900 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, 1] [2022-03-17 23:19:36,900 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-03-17 23:19:36,901 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:36,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:36,901 INFO L85 PathProgramCache]: Analyzing trace with hash 447821755, now seen corresponding path program 1 times [2022-03-17 23:19:36,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:36,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887004202] [2022-03-17 23:19:36,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:36,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:36,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:36,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:36,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:36,924 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 23:19:36,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:36,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887004202] [2022-03-17 23:19:36,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887004202] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:36,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:36,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:36,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455880794] [2022-03-17 23:19:36,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:36,925 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:36,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:36,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:36,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:36,926 INFO L87 Difference]: Start difference. First operand 34825 states and 41991 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:37,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:37,520 INFO L93 Difference]: Finished difference Result 57357 states and 69641 transitions. [2022-03-17 23:19:37,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:37,521 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-03-17 23:19:37,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:37,581 INFO L225 Difference]: With dead ends: 57357 [2022-03-17 23:19:37,582 INFO L226 Difference]: Without dead ends: 57355 [2022-03-17 23:19:37,592 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 23:19:37,593 INFO L912 BasicCegarLoop]: 73 mSDtfsCounter, 132 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 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, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:19:37,593 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 80 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:19:37,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57355 states. [2022-03-17 23:19:38,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57355 to 53257. [2022-03-17 23:19:38,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53257 states, 53253 states have (on average 1.1730418943533698) internal successors, (62468), 53253 states have internal predecessors, (62468), 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 23:19:38,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53257 states to 53257 states and 62471 transitions. [2022-03-17 23:19:38,499 INFO L78 Accepts]: Start accepts. Automaton has 53257 states and 62471 transitions. Word has length 33 [2022-03-17 23:19:38,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:38,499 INFO L478 AbstractCegarLoop]: Abstraction has 53257 states and 62471 transitions. [2022-03-17 23:19:38,499 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:38,499 INFO L276 IsEmpty]: Start isEmpty. Operand 53257 states and 62471 transitions. [2022-03-17 23:19:38,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-17 23:19:38,534 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:38,534 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, 1] [2022-03-17 23:19:38,534 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-03-17 23:19:38,534 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:38,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:38,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1955373564, now seen corresponding path program 1 times [2022-03-17 23:19:38,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:38,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559448510] [2022-03-17 23:19:38,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:38,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:38,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:38,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:38,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:38,563 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 23:19:38,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:38,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559448510] [2022-03-17 23:19:38,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559448510] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:38,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:38,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:38,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663838436] [2022-03-17 23:19:38,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:38,564 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:38,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:38,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:38,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:38,565 INFO L87 Difference]: Start difference. First operand 53257 states and 62471 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:39,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:39,462 INFO L93 Difference]: Finished difference Result 119821 states and 139273 transitions. [2022-03-17 23:19:39,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:39,462 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-03-17 23:19:39,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:39,538 INFO L225 Difference]: With dead ends: 119821 [2022-03-17 23:19:39,539 INFO L226 Difference]: Without dead ends: 67595 [2022-03-17 23:19:39,584 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 23:19:39,585 INFO L912 BasicCegarLoop]: 124 mSDtfsCounter, 118 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:19:39,585 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 131 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:19:39,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67595 states. [2022-03-17 23:19:40,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67595 to 67593. [2022-03-17 23:19:40,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67593 states, 67589 states have (on average 1.1363387533474383) internal successors, (76804), 67589 states have internal predecessors, (76804), 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 23:19:40,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67593 states to 67593 states and 76807 transitions. [2022-03-17 23:19:40,836 INFO L78 Accepts]: Start accepts. Automaton has 67593 states and 76807 transitions. Word has length 33 [2022-03-17 23:19:40,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:40,837 INFO L478 AbstractCegarLoop]: Abstraction has 67593 states and 76807 transitions. [2022-03-17 23:19:40,837 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:40,837 INFO L276 IsEmpty]: Start isEmpty. Operand 67593 states and 76807 transitions. [2022-03-17 23:19:40,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-17 23:19:40,874 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:40,874 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, 1, 1] [2022-03-17 23:19:40,874 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-03-17 23:19:40,874 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:40,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:40,874 INFO L85 PathProgramCache]: Analyzing trace with hash 997605812, now seen corresponding path program 1 times [2022-03-17 23:19:40,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:40,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953559497] [2022-03-17 23:19:40,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:40,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:40,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:40,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:40,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:40,913 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 23:19:40,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:40,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953559497] [2022-03-17 23:19:40,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953559497] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:40,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:40,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:40,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341836837] [2022-03-17 23:19:40,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:40,914 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:40,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:40,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:40,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:40,915 INFO L87 Difference]: Start difference. First operand 67593 states and 76807 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:41,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:41,728 INFO L93 Difference]: Finished difference Result 101389 states and 114697 transitions. [2022-03-17 23:19:41,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:41,729 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-03-17 23:19:41,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:41,810 INFO L225 Difference]: With dead ends: 101389 [2022-03-17 23:19:41,810 INFO L226 Difference]: Without dead ends: 68619 [2022-03-17 23:19:41,844 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 23:19:41,845 INFO L912 BasicCegarLoop]: 96 mSDtfsCounter, 147 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 103 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 23:19:41,845 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 103 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:19:41,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68619 states. [2022-03-17 23:19:42,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68619 to 68617. [2022-03-17 23:19:42,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68617 states, 68613 states have (on average 1.119379709384519) internal successors, (76804), 68613 states have internal predecessors, (76804), 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 23:19:43,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68617 states to 68617 states and 76807 transitions. [2022-03-17 23:19:43,086 INFO L78 Accepts]: Start accepts. Automaton has 68617 states and 76807 transitions. Word has length 34 [2022-03-17 23:19:43,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:43,087 INFO L478 AbstractCegarLoop]: Abstraction has 68617 states and 76807 transitions. [2022-03-17 23:19:43,087 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:43,087 INFO L276 IsEmpty]: Start isEmpty. Operand 68617 states and 76807 transitions. [2022-03-17 23:19:43,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-17 23:19:43,113 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:43,113 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, 1, 1] [2022-03-17 23:19:43,113 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-03-17 23:19:43,113 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:43,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:43,114 INFO L85 PathProgramCache]: Analyzing trace with hash 487071635, now seen corresponding path program 1 times [2022-03-17 23:19:43,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:43,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674984964] [2022-03-17 23:19:43,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:43,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:43,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:43,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:43,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:43,138 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 23:19:43,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:43,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674984964] [2022-03-17 23:19:43,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674984964] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:43,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:43,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:43,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669700104] [2022-03-17 23:19:43,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:43,139 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:43,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:43,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:43,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:43,140 INFO L87 Difference]: Start difference. First operand 68617 states and 76807 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:44,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:44,455 INFO L93 Difference]: Finished difference Result 110603 states and 122888 transitions. [2022-03-17 23:19:44,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:44,456 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-03-17 23:19:44,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:44,605 INFO L225 Difference]: With dead ends: 110603 [2022-03-17 23:19:44,605 INFO L226 Difference]: Without dead ends: 110601 [2022-03-17 23:19:44,622 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 23:19:44,623 INFO L912 BasicCegarLoop]: 71 mSDtfsCounter, 124 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:19:44,623 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 78 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:19:44,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110601 states. [2022-03-17 23:19:45,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110601 to 106505. [2022-03-17 23:19:46,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106505 states, 106501 states have (on average 1.0961399423479592) internal successors, (116740), 106501 states have internal predecessors, (116740), 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 23:19:46,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106505 states to 106505 states and 116743 transitions. [2022-03-17 23:19:46,441 INFO L78 Accepts]: Start accepts. Automaton has 106505 states and 116743 transitions. Word has length 34 [2022-03-17 23:19:46,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:46,442 INFO L478 AbstractCegarLoop]: Abstraction has 106505 states and 116743 transitions. [2022-03-17 23:19:46,442 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:46,442 INFO L276 IsEmpty]: Start isEmpty. Operand 106505 states and 116743 transitions. [2022-03-17 23:19:46,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-17 23:19:46,490 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:46,490 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, 1, 1] [2022-03-17 23:19:46,490 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-03-17 23:19:46,490 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:46,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:46,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1994623444, now seen corresponding path program 1 times [2022-03-17 23:19:46,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:46,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549679505] [2022-03-17 23:19:46,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:46,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:46,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:46,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:46,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:46,528 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 23:19:46,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:46,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549679505] [2022-03-17 23:19:46,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549679505] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:46,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:46,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:46,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533752735] [2022-03-17 23:19:46,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:46,529 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:46,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:46,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:46,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:46,529 INFO L87 Difference]: Start difference. First operand 106505 states and 116743 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:48,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:48,272 INFO L93 Difference]: Finished difference Result 237577 states and 256007 transitions. [2022-03-17 23:19:48,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:48,272 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-03-17 23:19:48,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:48,273 INFO L225 Difference]: With dead ends: 237577 [2022-03-17 23:19:48,273 INFO L226 Difference]: Without dead ends: 0 [2022-03-17 23:19:48,370 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 23:19:48,371 INFO L912 BasicCegarLoop]: 125 mSDtfsCounter, 109 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:19:48,371 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 132 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:19:48,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-17 23:19:48,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-17 23:19:48,372 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 23:19:48,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-17 23:19:48,372 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 34 [2022-03-17 23:19:48,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:48,372 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-17 23:19:48,372 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:48,372 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-17 23:19:48,372 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-17 23:19:48,375 INFO L788 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-17 23:19:48,375 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-03-17 23:19:48,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.