/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_15-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 23:20:11,010 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 23:20:11,011 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 23:20:11,071 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 23:20:11,071 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 23:20:11,072 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 23:20:11,074 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 23:20:11,077 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 23:20:11,078 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 23:20:11,082 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 23:20:11,083 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 23:20:11,084 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 23:20:11,085 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 23:20:11,086 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 23:20:11,087 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 23:20:11,089 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 23:20:11,089 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 23:20:11,090 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 23:20:11,091 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 23:20:11,095 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 23:20:11,096 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 23:20:11,097 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 23:20:11,098 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 23:20:11,098 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 23:20:11,099 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 23:20:11,101 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-17 23:20:11,101 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-17 23:20:11,101 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-17 23:20:11,102 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-17 23:20:11,102 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-17 23:20:11,103 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2022-03-17 23:20:11,106 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 23:20:11,107 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 23:20:11,108 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 23:20:11,109 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 23:20:11,131 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 23:20:11,132 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 23:20:11,133 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-17 23:20:11,133 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-17 23:20:11,134 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-17 23:20:11,134 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-17 23:20:11,136 INFO L138 SettingsManager]: * Use SBE=true [2022-03-17 23:20:11,136 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 23:20:11,136 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 23:20:11,136 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 23:20:11,136 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 23:20:11,137 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 23:20:11,137 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 23:20:11,137 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 23:20:11,137 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 23:20:11,137 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 23:20:11,137 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 23:20:11,137 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 23:20:11,137 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 23:20:11,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 23:20:11,137 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 23:20:11,137 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-17 23:20:11,138 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-17 23:20:11,138 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 23:20:11,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-17 23:20:11,138 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-17 23:20:11,138 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-17 23:20:11,138 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-17 23:20:11,139 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 23:20:11,139 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 23:20:11,313 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 23:20:11,331 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 23:20:11,333 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 23:20:11,334 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 23:20:11,334 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 23:20:11,335 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_15-2.c [2022-03-17 23:20:11,381 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd79d5ce3/8854bfcd6a154354b8a3e0ddd60c8d1c/FLAG1ec984b5f [2022-03-17 23:20:11,706 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 23:20:11,706 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_15-2.c [2022-03-17 23:20:11,719 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd79d5ce3/8854bfcd6a154354b8a3e0ddd60c8d1c/FLAG1ec984b5f [2022-03-17 23:20:12,113 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd79d5ce3/8854bfcd6a154354b8a3e0ddd60c8d1c [2022-03-17 23:20:12,114 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 23:20:12,115 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 23:20:12,123 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 23:20:12,124 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 23:20:12,126 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 23:20:12,127 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 11:20:12" (1/1) ... [2022-03-17 23:20:12,140 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@463d9328 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:20:12, skipping insertion in model container [2022-03-17 23:20:12,140 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 11:20:12" (1/1) ... [2022-03-17 23:20:12,145 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 23:20:12,166 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 23:20:12,323 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_15-2.c[5628,5641] [2022-03-17 23:20:12,326 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 23:20:12,331 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 23:20:12,350 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_15-2.c[5628,5641] [2022-03-17 23:20:12,351 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 23:20:12,360 INFO L208 MainTranslator]: Completed translation [2022-03-17 23:20:12,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:20:12 WrapperNode [2022-03-17 23:20:12,360 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 23:20:12,361 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 23:20:12,361 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 23:20:12,361 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 23:20:12,368 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:20:12" (1/1) ... [2022-03-17 23:20:12,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:20:12" (1/1) ... [2022-03-17 23:20:12,372 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:20:12" (1/1) ... [2022-03-17 23:20:12,372 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:20:12" (1/1) ... [2022-03-17 23:20:12,381 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:20:12" (1/1) ... [2022-03-17 23:20:12,385 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:20:12" (1/1) ... [2022-03-17 23:20:12,386 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:20:12" (1/1) ... [2022-03-17 23:20:12,387 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 23:20:12,388 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 23:20:12,388 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 23:20:12,388 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 23:20:12,395 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:20:12" (1/1) ... [2022-03-17 23:20:12,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 23:20:12,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 23:20:12,424 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 23:20:12,431 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 23:20:12,454 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 23:20:12,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 23:20:12,455 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 23:20:12,455 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 23:20:12,455 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 23:20:12,455 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 23:20:12,455 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 23:20:12,455 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 23:20:12,455 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-17 23:20:12,455 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 23:20:12,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 23:20:12,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 23:20:12,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 23:20:12,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 23:20:12,456 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 23:20:12,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 23:20:12,504 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 23:20:12,505 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 23:20:12,718 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 23:20:12,723 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 23:20:12,723 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-17 23:20:12,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 11:20:12 BoogieIcfgContainer [2022-03-17 23:20:12,725 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 23:20:12,725 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 23:20:12,725 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 23:20:12,726 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 23:20:12,729 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 11:20:12" (1/1) ... [2022-03-17 23:20:12,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 11:20:12 BasicIcfg [2022-03-17 23:20:12,745 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 23:20:12,746 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 23:20:12,746 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 23:20:12,748 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 23:20:12,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 11:20:12" (1/4) ... [2022-03-17 23:20:12,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58a82543 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 11:20:12, skipping insertion in model container [2022-03-17 23:20:12,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:20:12" (2/4) ... [2022-03-17 23:20:12,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58a82543 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 11:20:12, skipping insertion in model container [2022-03-17 23:20:12,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 11:20:12" (3/4) ... [2022-03-17 23:20:12,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58a82543 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 11:20:12, skipping insertion in model container [2022-03-17 23:20:12,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 11:20:12" (4/4) ... [2022-03-17 23:20:12,753 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_15-2.cqvasr [2022-03-17 23:20:12,757 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-17 23:20:12,757 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 23:20:12,786 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 23:20:12,791 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 23:20:12,791 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 23:20:12,803 INFO L276 IsEmpty]: Start isEmpty. Operand has 60 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 55 states have internal predecessors, (103), 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 23:20:12,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-17 23:20:12,807 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:20:12,807 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 23:20:12,808 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:20:12,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:20:12,812 INFO L85 PathProgramCache]: Analyzing trace with hash 539653987, now seen corresponding path program 1 times [2022-03-17 23:20:12,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:20:12,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728923559] [2022-03-17 23:20:12,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:20:12,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:20:12,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:13,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:20:13,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:13,035 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 23:20:13,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:20:13,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728923559] [2022-03-17 23:20:13,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728923559] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:20:13,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:20:13,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:20:13,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421822700] [2022-03-17 23:20:13,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:20:13,043 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:20:13,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:20:13,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:20:13,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:20:13,062 INFO L87 Difference]: Start difference. First operand has 60 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 55 states have internal predecessors, (103), 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 5.75) 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 23:20:13,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:20:13,214 INFO L93 Difference]: Finished difference Result 118 states and 211 transitions. [2022-03-17 23:20:13,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:20:13,217 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 23:20:13,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:20:13,227 INFO L225 Difference]: With dead ends: 118 [2022-03-17 23:20:13,227 INFO L226 Difference]: Without dead ends: 103 [2022-03-17 23:20:13,230 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 23:20:13,234 INFO L912 BasicCegarLoop]: 110 mSDtfsCounter, 259 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:20:13,235 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 119 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:20:13,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-17 23:20:13,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 71. [2022-03-17 23:20:13,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 67 states have (on average 1.8955223880597014) internal successors, (127), 67 states have internal predecessors, (127), 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 23:20:13,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 130 transitions. [2022-03-17 23:20:13,263 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 130 transitions. Word has length 26 [2022-03-17 23:20:13,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:20:13,263 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 130 transitions. [2022-03-17 23:20:13,264 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 23:20:13,264 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 130 transitions. [2022-03-17 23:20:13,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-17 23:20:13,264 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:20:13,264 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 23:20:13,265 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 23:20:13,265 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:20:13,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:20:13,266 INFO L85 PathProgramCache]: Analyzing trace with hash -457418366, now seen corresponding path program 1 times [2022-03-17 23:20:13,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:20:13,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480079075] [2022-03-17 23:20:13,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:20:13,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:20:13,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:13,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:20:13,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:13,343 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 23:20:13,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:20:13,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480079075] [2022-03-17 23:20:13,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480079075] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:20:13,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:20:13,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:20:13,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268986147] [2022-03-17 23:20:13,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:20:13,345 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:20:13,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:20:13,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:20:13,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:20:13,345 INFO L87 Difference]: Start difference. First operand 71 states and 130 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 23:20:13,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:20:13,460 INFO L93 Difference]: Finished difference Result 168 states and 313 transitions. [2022-03-17 23:20:13,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:20:13,461 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 23:20:13,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:20:13,465 INFO L225 Difference]: With dead ends: 168 [2022-03-17 23:20:13,465 INFO L226 Difference]: Without dead ends: 103 [2022-03-17 23:20:13,468 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 23:20:13,469 INFO L912 BasicCegarLoop]: 128 mSDtfsCounter, 223 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:20:13,469 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 135 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:20:13,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-17 23:20:13,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2022-03-17 23:20:13,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 97 states have (on average 1.8865979381443299) internal successors, (183), 97 states have internal predecessors, (183), 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 23:20:13,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 186 transitions. [2022-03-17 23:20:13,478 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 186 transitions. Word has length 26 [2022-03-17 23:20:13,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:20:13,478 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 186 transitions. [2022-03-17 23:20:13,478 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 23:20:13,479 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 186 transitions. [2022-03-17 23:20:13,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-17 23:20:13,479 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:20:13,479 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 23:20:13,479 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-17 23:20:13,480 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:20:13,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:20:13,480 INFO L85 PathProgramCache]: Analyzing trace with hash -450563475, now seen corresponding path program 1 times [2022-03-17 23:20:13,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:20:13,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839518261] [2022-03-17 23:20:13,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:20:13,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:20:13,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:13,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:20:13,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:13,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 23:20:13,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:20:13,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839518261] [2022-03-17 23:20:13,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839518261] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:20:13,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:20:13,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:20:13,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767122754] [2022-03-17 23:20:13,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:20:13,557 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:20:13,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:20:13,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:20:13,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:20:13,558 INFO L87 Difference]: Start difference. First operand 101 states and 186 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 23:20:13,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:20:13,657 INFO L93 Difference]: Finished difference Result 154 states and 280 transitions. [2022-03-17 23:20:13,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:20:13,658 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 23:20:13,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:20:13,659 INFO L225 Difference]: With dead ends: 154 [2022-03-17 23:20:13,659 INFO L226 Difference]: Without dead ends: 106 [2022-03-17 23:20:13,660 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 23:20:13,666 INFO L912 BasicCegarLoop]: 156 mSDtfsCounter, 196 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:20:13,667 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 163 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:20:13,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-03-17 23:20:13,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2022-03-17 23:20:13,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 100 states have (on average 1.85) internal successors, (185), 100 states have internal predecessors, (185), 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 23:20:13,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 188 transitions. [2022-03-17 23:20:13,680 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 188 transitions. Word has length 27 [2022-03-17 23:20:13,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:20:13,681 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 188 transitions. [2022-03-17 23:20:13,681 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 23:20:13,681 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 188 transitions. [2022-03-17 23:20:13,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-17 23:20:13,681 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:20:13,681 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 23:20:13,681 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-17 23:20:13,682 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:20:13,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:20:13,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1295035346, now seen corresponding path program 1 times [2022-03-17 23:20:13,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:20:13,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331851894] [2022-03-17 23:20:13,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:20:13,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:20:13,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:13,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:20:13,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:13,743 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 23:20:13,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:20:13,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331851894] [2022-03-17 23:20:13,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331851894] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:20:13,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:20:13,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:20:13,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589295960] [2022-03-17 23:20:13,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:20:13,744 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:20:13,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:20:13,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:20:13,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:20:13,745 INFO L87 Difference]: Start difference. First operand 104 states and 188 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 23:20:13,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:20:13,833 INFO L93 Difference]: Finished difference Result 292 states and 540 transitions. [2022-03-17 23:20:13,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:20:13,834 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 23:20:13,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:20:13,836 INFO L225 Difference]: With dead ends: 292 [2022-03-17 23:20:13,836 INFO L226 Difference]: Without dead ends: 197 [2022-03-17 23:20:13,836 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 23:20:13,842 INFO L912 BasicCegarLoop]: 102 mSDtfsCounter, 248 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:20:13,843 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 109 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:20:13,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-03-17 23:20:13,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 195. [2022-03-17 23:20:13,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 191 states have (on average 1.8534031413612566) internal successors, (354), 191 states have internal predecessors, (354), 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 23:20:13,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 357 transitions. [2022-03-17 23:20:13,873 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 357 transitions. Word has length 27 [2022-03-17 23:20:13,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:20:13,873 INFO L478 AbstractCegarLoop]: Abstraction has 195 states and 357 transitions. [2022-03-17 23:20:13,874 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 23:20:13,874 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 357 transitions. [2022-03-17 23:20:13,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-17 23:20:13,874 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:20:13,874 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] [2022-03-17 23:20:13,875 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-17 23:20:13,875 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:20:13,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:20:13,875 INFO L85 PathProgramCache]: Analyzing trace with hash -297962993, now seen corresponding path program 1 times [2022-03-17 23:20:13,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:20:13,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021581595] [2022-03-17 23:20:13,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:20:13,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:20:13,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:13,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:20:13,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:13,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 23:20:13,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:20:13,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021581595] [2022-03-17 23:20:13,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021581595] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:20:13,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:20:13,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:20:13,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660822] [2022-03-17 23:20:13,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:20:13,909 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:20:13,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:20:13,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:20:13,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:20:13,910 INFO L87 Difference]: Start difference. First operand 195 states and 357 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 23:20:13,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:20:13,988 INFO L93 Difference]: Finished difference Result 255 states and 467 transitions. [2022-03-17 23:20:13,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:20:13,988 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 23:20:13,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:20:13,990 INFO L225 Difference]: With dead ends: 255 [2022-03-17 23:20:13,993 INFO L226 Difference]: Without dead ends: 253 [2022-03-17 23:20:13,994 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 23:20:13,998 INFO L912 BasicCegarLoop]: 181 mSDtfsCounter, 161 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:20:13,999 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 188 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:20:13,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-03-17 23:20:14,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 195. [2022-03-17 23:20:14,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 191 states have (on average 1.8429319371727748) internal successors, (352), 191 states have internal predecessors, (352), 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 23:20:14,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 355 transitions. [2022-03-17 23:20:14,012 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 355 transitions. Word has length 27 [2022-03-17 23:20:14,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:20:14,012 INFO L478 AbstractCegarLoop]: Abstraction has 195 states and 355 transitions. [2022-03-17 23:20:14,013 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 23:20:14,013 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 355 transitions. [2022-03-17 23:20:14,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-17 23:20:14,013 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:20:14,013 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 23:20:14,014 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-17 23:20:14,014 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:20:14,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:20:14,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1491357826, now seen corresponding path program 1 times [2022-03-17 23:20:14,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:20:14,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962999949] [2022-03-17 23:20:14,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:20:14,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:20:14,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:14,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:20:14,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:14,081 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 23:20:14,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:20:14,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962999949] [2022-03-17 23:20:14,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962999949] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:20:14,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:20:14,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:20:14,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195144467] [2022-03-17 23:20:14,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:20:14,082 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:20:14,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:20:14,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:20:14,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:20:14,083 INFO L87 Difference]: Start difference. First operand 195 states and 355 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 23:20:14,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:20:14,169 INFO L93 Difference]: Finished difference Result 371 states and 683 transitions. [2022-03-17 23:20:14,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:20:14,169 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 23:20:14,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:20:14,171 INFO L225 Difference]: With dead ends: 371 [2022-03-17 23:20:14,171 INFO L226 Difference]: Without dead ends: 369 [2022-03-17 23:20:14,171 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 23:20:14,171 INFO L912 BasicCegarLoop]: 99 mSDtfsCounter, 239 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:20:14,172 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 106 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:20:14,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-03-17 23:20:14,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 263. [2022-03-17 23:20:14,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 259 states have (on average 1.83011583011583) internal successors, (474), 259 states have internal predecessors, (474), 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 23:20:14,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 477 transitions. [2022-03-17 23:20:14,189 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 477 transitions. Word has length 28 [2022-03-17 23:20:14,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:20:14,189 INFO L478 AbstractCegarLoop]: Abstraction has 263 states and 477 transitions. [2022-03-17 23:20:14,189 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 23:20:14,189 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 477 transitions. [2022-03-17 23:20:14,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-17 23:20:14,190 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:20:14,190 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 23:20:14,190 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-17 23:20:14,190 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:20:14,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:20:14,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1806537117, now seen corresponding path program 1 times [2022-03-17 23:20:14,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:20:14,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907129850] [2022-03-17 23:20:14,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:20:14,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:20:14,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:14,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:20:14,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:14,229 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 23:20:14,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:20:14,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907129850] [2022-03-17 23:20:14,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907129850] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:20:14,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:20:14,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:20:14,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891895418] [2022-03-17 23:20:14,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:20:14,230 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:20:14,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:20:14,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:20:14,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:20:14,231 INFO L87 Difference]: Start difference. First operand 263 states and 477 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 23:20:14,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:20:14,300 INFO L93 Difference]: Finished difference Result 631 states and 1155 transitions. [2022-03-17 23:20:14,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:20:14,301 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 23:20:14,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:20:14,302 INFO L225 Difference]: With dead ends: 631 [2022-03-17 23:20:14,302 INFO L226 Difference]: Without dead ends: 377 [2022-03-17 23:20:14,305 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 23:20:14,306 INFO L912 BasicCegarLoop]: 132 mSDtfsCounter, 211 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:20:14,307 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 139 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:20:14,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-03-17 23:20:14,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 375. [2022-03-17 23:20:14,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 371 states have (on average 1.8221024258760108) internal successors, (676), 371 states have internal predecessors, (676), 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 23:20:14,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 679 transitions. [2022-03-17 23:20:14,316 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 679 transitions. Word has length 28 [2022-03-17 23:20:14,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:20:14,316 INFO L478 AbstractCegarLoop]: Abstraction has 375 states and 679 transitions. [2022-03-17 23:20:14,316 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 23:20:14,316 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 679 transitions. [2022-03-17 23:20:14,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-17 23:20:14,320 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:20:14,320 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 23:20:14,320 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-17 23:20:14,320 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:20:14,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:20:14,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1012580010, now seen corresponding path program 1 times [2022-03-17 23:20:14,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:20:14,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010877274] [2022-03-17 23:20:14,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:20:14,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:20:14,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:14,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:20:14,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:14,374 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 23:20:14,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:20:14,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010877274] [2022-03-17 23:20:14,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010877274] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:20:14,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:20:14,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:20:14,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342362189] [2022-03-17 23:20:14,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:20:14,376 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:20:14,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:20:14,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:20:14,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:20:14,378 INFO L87 Difference]: Start difference. First operand 375 states and 679 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 23:20:14,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:20:14,449 INFO L93 Difference]: Finished difference Result 565 states and 1021 transitions. [2022-03-17 23:20:14,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:20:14,449 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 23:20:14,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:20:14,452 INFO L225 Difference]: With dead ends: 565 [2022-03-17 23:20:14,452 INFO L226 Difference]: Without dead ends: 383 [2022-03-17 23:20:14,453 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 23:20:14,453 INFO L912 BasicCegarLoop]: 150 mSDtfsCounter, 194 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:20:14,453 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 157 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:20:14,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-03-17 23:20:14,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 381. [2022-03-17 23:20:14,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 377 states have (on average 1.8037135278514589) internal successors, (680), 377 states have internal predecessors, (680), 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 23:20:14,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 683 transitions. [2022-03-17 23:20:14,462 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 683 transitions. Word has length 29 [2022-03-17 23:20:14,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:20:14,462 INFO L478 AbstractCegarLoop]: Abstraction has 381 states and 683 transitions. [2022-03-17 23:20:14,462 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 23:20:14,462 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 683 transitions. [2022-03-17 23:20:14,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-17 23:20:14,464 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:20:14,464 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 23:20:14,464 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-17 23:20:14,464 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:20:14,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:20:14,465 INFO L85 PathProgramCache]: Analyzing trace with hash 168108139, now seen corresponding path program 1 times [2022-03-17 23:20:14,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:20:14,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815473203] [2022-03-17 23:20:14,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:20:14,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:20:14,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:14,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:20:14,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:14,518 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 23:20:14,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:20:14,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815473203] [2022-03-17 23:20:14,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815473203] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:20:14,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:20:14,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:20:14,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209969754] [2022-03-17 23:20:14,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:20:14,519 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:20:14,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:20:14,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:20:14,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:20:14,520 INFO L87 Difference]: Start difference. First operand 381 states and 683 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 23:20:14,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:20:14,588 INFO L93 Difference]: Finished difference Result 717 states and 1301 transitions. [2022-03-17 23:20:14,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:20:14,588 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 23:20:14,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:20:14,591 INFO L225 Difference]: With dead ends: 717 [2022-03-17 23:20:14,591 INFO L226 Difference]: Without dead ends: 715 [2022-03-17 23:20:14,591 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 23:20:14,593 INFO L912 BasicCegarLoop]: 98 mSDtfsCounter, 232 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:20:14,593 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 105 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:20:14,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2022-03-17 23:20:14,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 521. [2022-03-17 23:20:14,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 517 states have (on average 1.7794970986460348) internal successors, (920), 517 states have internal predecessors, (920), 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 23:20:14,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 923 transitions. [2022-03-17 23:20:14,604 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 923 transitions. Word has length 29 [2022-03-17 23:20:14,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:20:14,604 INFO L478 AbstractCegarLoop]: Abstraction has 521 states and 923 transitions. [2022-03-17 23:20:14,604 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 23:20:14,604 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 923 transitions. [2022-03-17 23:20:14,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-17 23:20:14,605 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:20:14,606 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 23:20:14,606 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-17 23:20:14,606 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:20:14,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:20:14,606 INFO L85 PathProgramCache]: Analyzing trace with hash -828964214, now seen corresponding path program 1 times [2022-03-17 23:20:14,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:20:14,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443948904] [2022-03-17 23:20:14,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:20:14,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:20:14,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:14,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:20:14,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:14,649 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 23:20:14,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:20:14,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443948904] [2022-03-17 23:20:14,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443948904] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:20:14,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:20:14,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:20:14,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364949481] [2022-03-17 23:20:14,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:20:14,650 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:20:14,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:20:14,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:20:14,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:20:14,651 INFO L87 Difference]: Start difference. First operand 521 states and 923 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 23:20:14,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:20:14,722 INFO L93 Difference]: Finished difference Result 1245 states and 2221 transitions. [2022-03-17 23:20:14,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:20:14,722 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-17 23:20:14,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:20:14,725 INFO L225 Difference]: With dead ends: 1245 [2022-03-17 23:20:14,726 INFO L226 Difference]: Without dead ends: 739 [2022-03-17 23:20:14,726 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 23:20:14,727 INFO L912 BasicCegarLoop]: 134 mSDtfsCounter, 205 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:20:14,727 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 141 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:20:14,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2022-03-17 23:20:14,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 737. [2022-03-17 23:20:14,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 733 states have (on average 1.7735334242837653) internal successors, (1300), 733 states have internal predecessors, (1300), 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 23:20:14,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1303 transitions. [2022-03-17 23:20:14,744 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 1303 transitions. Word has length 29 [2022-03-17 23:20:14,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:20:14,744 INFO L478 AbstractCegarLoop]: Abstraction has 737 states and 1303 transitions. [2022-03-17 23:20:14,744 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 23:20:14,744 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 1303 transitions. [2022-03-17 23:20:14,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-17 23:20:14,744 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:20:14,745 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, 1, 1, 1, 1] [2022-03-17 23:20:14,745 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-17 23:20:14,745 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:20:14,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:20:14,745 INFO L85 PathProgramCache]: Analyzing trace with hash 916417497, now seen corresponding path program 1 times [2022-03-17 23:20:14,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:20:14,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740792781] [2022-03-17 23:20:14,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:20:14,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:20:14,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:14,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:20:14,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:14,775 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 23:20:14,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:20:14,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740792781] [2022-03-17 23:20:14,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740792781] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:20:14,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:20:14,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:20:14,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325593431] [2022-03-17 23:20:14,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:20:14,776 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:20:14,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:20:14,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:20:14,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:20:14,776 INFO L87 Difference]: Start difference. First operand 737 states and 1303 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 23:20:14,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:20:14,848 INFO L93 Difference]: Finished difference Result 1105 states and 1949 transitions. [2022-03-17 23:20:14,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:20:14,848 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 23:20:14,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:20:14,850 INFO L225 Difference]: With dead ends: 1105 [2022-03-17 23:20:14,851 INFO L226 Difference]: Without dead ends: 747 [2022-03-17 23:20:14,851 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 23:20:14,852 INFO L912 BasicCegarLoop]: 147 mSDtfsCounter, 193 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:20:14,852 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 154 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:20:14,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2022-03-17 23:20:14,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 745. [2022-03-17 23:20:14,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 741 states have (on average 1.7543859649122806) internal successors, (1300), 741 states have internal predecessors, (1300), 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 23:20:14,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1303 transitions. [2022-03-17 23:20:14,867 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1303 transitions. Word has length 30 [2022-03-17 23:20:14,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:20:14,867 INFO L478 AbstractCegarLoop]: Abstraction has 745 states and 1303 transitions. [2022-03-17 23:20:14,867 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 23:20:14,867 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1303 transitions. [2022-03-17 23:20:14,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-17 23:20:14,868 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:20:14,868 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 23:20:14,868 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-17 23:20:14,868 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:20:14,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:20:14,868 INFO L85 PathProgramCache]: Analyzing trace with hash 71945626, now seen corresponding path program 1 times [2022-03-17 23:20:14,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:20:14,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582332375] [2022-03-17 23:20:14,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:20:14,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:20:14,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:14,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:20:14,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:14,904 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 23:20:14,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:20:14,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582332375] [2022-03-17 23:20:14,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582332375] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:20:14,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:20:14,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:20:14,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33530277] [2022-03-17 23:20:14,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:20:14,904 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:20:14,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:20:14,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:20:14,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:20:14,905 INFO L87 Difference]: Start difference. First operand 745 states and 1303 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 23:20:14,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:20:14,978 INFO L93 Difference]: Finished difference Result 1389 states and 2465 transitions. [2022-03-17 23:20:14,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:20:14,979 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 23:20:14,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:20:14,982 INFO L225 Difference]: With dead ends: 1389 [2022-03-17 23:20:14,983 INFO L226 Difference]: Without dead ends: 1387 [2022-03-17 23:20:14,983 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 23:20:14,984 INFO L912 BasicCegarLoop]: 97 mSDtfsCounter, 225 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:20:14,984 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 104 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:20:14,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1387 states. [2022-03-17 23:20:15,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1387 to 1033. [2022-03-17 23:20:15,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 1029 states have (on average 1.7220602526724975) internal successors, (1772), 1029 states have internal predecessors, (1772), 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 23:20:15,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 1775 transitions. [2022-03-17 23:20:15,005 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 1775 transitions. Word has length 30 [2022-03-17 23:20:15,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:20:15,006 INFO L478 AbstractCegarLoop]: Abstraction has 1033 states and 1775 transitions. [2022-03-17 23:20:15,007 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 23:20:15,007 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 1775 transitions. [2022-03-17 23:20:15,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-17 23:20:15,008 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:20:15,008 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 23:20:15,008 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-17 23:20:15,008 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:20:15,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:20:15,009 INFO L85 PathProgramCache]: Analyzing trace with hash -925126727, now seen corresponding path program 1 times [2022-03-17 23:20:15,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:20:15,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219980572] [2022-03-17 23:20:15,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:20:15,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:20:15,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:15,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:20:15,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:15,058 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 23:20:15,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:20:15,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219980572] [2022-03-17 23:20:15,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219980572] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:20:15,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:20:15,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:20:15,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327942546] [2022-03-17 23:20:15,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:20:15,059 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:20:15,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:20:15,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:20:15,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:20:15,060 INFO L87 Difference]: Start difference. First operand 1033 states and 1775 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 23:20:15,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:20:15,141 INFO L93 Difference]: Finished difference Result 2461 states and 4257 transitions. [2022-03-17 23:20:15,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:20:15,141 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 23:20:15,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:20:15,146 INFO L225 Difference]: With dead ends: 2461 [2022-03-17 23:20:15,146 INFO L226 Difference]: Without dead ends: 1451 [2022-03-17 23:20:15,147 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 23:20:15,148 INFO L912 BasicCegarLoop]: 136 mSDtfsCounter, 199 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:20:15,148 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 143 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:20:15,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2022-03-17 23:20:15,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 1449. [2022-03-17 23:20:15,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1449 states, 1445 states have (on average 1.719031141868512) internal successors, (2484), 1445 states have internal predecessors, (2484), 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 23:20:15,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1449 states to 1449 states and 2487 transitions. [2022-03-17 23:20:15,185 INFO L78 Accepts]: Start accepts. Automaton has 1449 states and 2487 transitions. Word has length 30 [2022-03-17 23:20:15,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:20:15,185 INFO L478 AbstractCegarLoop]: Abstraction has 1449 states and 2487 transitions. [2022-03-17 23:20:15,185 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 23:20:15,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states and 2487 transitions. [2022-03-17 23:20:15,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-17 23:20:15,186 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:20:15,186 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 23:20:15,187 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-03-17 23:20:15,187 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:20:15,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:20:15,187 INFO L85 PathProgramCache]: Analyzing trace with hash -2064620282, now seen corresponding path program 1 times [2022-03-17 23:20:15,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:20:15,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220967094] [2022-03-17 23:20:15,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:20:15,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:20:15,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:15,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:20:15,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:15,213 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 23:20:15,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:20:15,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220967094] [2022-03-17 23:20:15,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220967094] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:20:15,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:20:15,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:20:15,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958645128] [2022-03-17 23:20:15,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:20:15,214 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:20:15,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:20:15,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:20:15,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:20:15,215 INFO L87 Difference]: Start difference. First operand 1449 states and 2487 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 23:20:15,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:20:15,292 INFO L93 Difference]: Finished difference Result 2173 states and 3721 transitions. [2022-03-17 23:20:15,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:20:15,293 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 23:20:15,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:20:15,297 INFO L225 Difference]: With dead ends: 2173 [2022-03-17 23:20:15,297 INFO L226 Difference]: Without dead ends: 1467 [2022-03-17 23:20:15,298 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 23:20:15,298 INFO L912 BasicCegarLoop]: 144 mSDtfsCounter, 192 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:20:15,299 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 151 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:20:15,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1467 states. [2022-03-17 23:20:15,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1467 to 1465. [2022-03-17 23:20:15,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1465 states, 1461 states have (on average 1.700205338809035) internal successors, (2484), 1461 states have internal predecessors, (2484), 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 23:20:15,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 2487 transitions. [2022-03-17 23:20:15,329 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 2487 transitions. Word has length 31 [2022-03-17 23:20:15,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:20:15,330 INFO L478 AbstractCegarLoop]: Abstraction has 1465 states and 2487 transitions. [2022-03-17 23:20:15,330 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 23:20:15,330 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 2487 transitions. [2022-03-17 23:20:15,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-17 23:20:15,331 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:20:15,331 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 23:20:15,331 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-03-17 23:20:15,331 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:20:15,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:20:15,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1385875143, now seen corresponding path program 1 times [2022-03-17 23:20:15,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:20:15,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795499643] [2022-03-17 23:20:15,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:20:15,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:20:15,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:15,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:20:15,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:15,366 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 23:20:15,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:20:15,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795499643] [2022-03-17 23:20:15,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795499643] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:20:15,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:20:15,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:20:15,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460265845] [2022-03-17 23:20:15,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:20:15,367 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:20:15,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:20:15,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:20:15,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:20:15,367 INFO L87 Difference]: Start difference. First operand 1465 states and 2487 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 23:20:15,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:20:15,451 INFO L93 Difference]: Finished difference Result 2701 states and 4665 transitions. [2022-03-17 23:20:15,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:20:15,451 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 23:20:15,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:20:15,459 INFO L225 Difference]: With dead ends: 2701 [2022-03-17 23:20:15,459 INFO L226 Difference]: Without dead ends: 2699 [2022-03-17 23:20:15,461 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 23:20:15,462 INFO L912 BasicCegarLoop]: 96 mSDtfsCounter, 218 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:20:15,462 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 103 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:20:15,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2699 states. [2022-03-17 23:20:15,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2699 to 2057. [2022-03-17 23:20:15,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2057 states, 2053 states have (on average 1.6619581100828056) internal successors, (3412), 2053 states have internal predecessors, (3412), 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 23:20:15,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2057 states to 2057 states and 3415 transitions. [2022-03-17 23:20:15,506 INFO L78 Accepts]: Start accepts. Automaton has 2057 states and 3415 transitions. Word has length 31 [2022-03-17 23:20:15,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:20:15,506 INFO L478 AbstractCegarLoop]: Abstraction has 2057 states and 3415 transitions. [2022-03-17 23:20:15,506 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 23:20:15,506 INFO L276 IsEmpty]: Start isEmpty. Operand 2057 states and 3415 transitions. [2022-03-17 23:20:15,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-17 23:20:15,508 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:20:15,508 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 23:20:15,508 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-03-17 23:20:15,508 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:20:15,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:20:15,509 INFO L85 PathProgramCache]: Analyzing trace with hash 388802790, now seen corresponding path program 1 times [2022-03-17 23:20:15,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:20:15,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63077707] [2022-03-17 23:20:15,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:20:15,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:20:15,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:15,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:20:15,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:15,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 23:20:15,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:20:15,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63077707] [2022-03-17 23:20:15,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63077707] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:20:15,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:20:15,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:20:15,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342415214] [2022-03-17 23:20:15,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:20:15,542 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:20:15,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:20:15,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:20:15,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:20:15,542 INFO L87 Difference]: Start difference. First operand 2057 states and 3415 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 23:20:15,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:20:15,634 INFO L93 Difference]: Finished difference Result 4877 states and 8153 transitions. [2022-03-17 23:20:15,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:20:15,634 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 23:20:15,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:20:15,642 INFO L225 Difference]: With dead ends: 4877 [2022-03-17 23:20:15,642 INFO L226 Difference]: Without dead ends: 2859 [2022-03-17 23:20:15,645 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 23:20:15,645 INFO L912 BasicCegarLoop]: 138 mSDtfsCounter, 193 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:20:15,645 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 145 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:20:15,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2859 states. [2022-03-17 23:20:15,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2859 to 2857. [2022-03-17 23:20:15,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2857 states, 2853 states have (on average 1.6614090431125133) internal successors, (4740), 2853 states have internal predecessors, (4740), 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 23:20:15,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2857 states to 2857 states and 4743 transitions. [2022-03-17 23:20:15,729 INFO L78 Accepts]: Start accepts. Automaton has 2857 states and 4743 transitions. Word has length 31 [2022-03-17 23:20:15,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:20:15,730 INFO L478 AbstractCegarLoop]: Abstraction has 2857 states and 4743 transitions. [2022-03-17 23:20:15,730 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 23:20:15,730 INFO L276 IsEmpty]: Start isEmpty. Operand 2857 states and 4743 transitions. [2022-03-17 23:20:15,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-17 23:20:15,732 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:20:15,732 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 23:20:15,732 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-03-17 23:20:15,732 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:20:15,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:20:15,732 INFO L85 PathProgramCache]: Analyzing trace with hash 12489205, now seen corresponding path program 1 times [2022-03-17 23:20:15,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:20:15,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094572175] [2022-03-17 23:20:15,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:20:15,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:20:15,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:15,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:20:15,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:15,767 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 23:20:15,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:20:15,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094572175] [2022-03-17 23:20:15,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094572175] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:20:15,768 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:20:15,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:20:15,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883585022] [2022-03-17 23:20:15,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:20:15,768 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:20:15,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:20:15,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:20:15,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:20:15,769 INFO L87 Difference]: Start difference. First operand 2857 states and 4743 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 23:20:15,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:20:15,854 INFO L93 Difference]: Finished difference Result 4285 states and 7097 transitions. [2022-03-17 23:20:15,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:20:15,855 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-03-17 23:20:15,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:20:15,862 INFO L225 Difference]: With dead ends: 4285 [2022-03-17 23:20:15,862 INFO L226 Difference]: Without dead ends: 2891 [2022-03-17 23:20:15,865 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 23:20:15,866 INFO L912 BasicCegarLoop]: 141 mSDtfsCounter, 191 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:20:15,866 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 148 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:20:15,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2891 states. [2022-03-17 23:20:15,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2891 to 2889. [2022-03-17 23:20:15,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2889 states, 2885 states have (on average 1.6429809358752165) internal successors, (4740), 2885 states have internal predecessors, (4740), 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 23:20:15,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2889 states to 2889 states and 4743 transitions. [2022-03-17 23:20:15,919 INFO L78 Accepts]: Start accepts. Automaton has 2889 states and 4743 transitions. Word has length 32 [2022-03-17 23:20:15,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:20:15,919 INFO L478 AbstractCegarLoop]: Abstraction has 2889 states and 4743 transitions. [2022-03-17 23:20:15,919 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 23:20:15,919 INFO L276 IsEmpty]: Start isEmpty. Operand 2889 states and 4743 transitions. [2022-03-17 23:20:15,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-17 23:20:15,921 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:20:15,921 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 23:20:15,921 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-03-17 23:20:15,921 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:20:15,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:20:15,922 INFO L85 PathProgramCache]: Analyzing trace with hash -831982666, now seen corresponding path program 1 times [2022-03-17 23:20:15,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:20:15,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339081096] [2022-03-17 23:20:15,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:20:15,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:20:15,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:15,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:20:15,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:15,955 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 23:20:15,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:20:15,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339081096] [2022-03-17 23:20:15,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339081096] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:20:15,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:20:15,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:20:15,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610398112] [2022-03-17 23:20:15,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:20:15,956 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:20:15,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:20:15,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:20:15,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:20:15,956 INFO L87 Difference]: Start difference. First operand 2889 states and 4743 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 23:20:16,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:20:16,052 INFO L93 Difference]: Finished difference Result 5261 states and 8809 transitions. [2022-03-17 23:20:16,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:20:16,052 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 23:20:16,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:20:16,067 INFO L225 Difference]: With dead ends: 5261 [2022-03-17 23:20:16,067 INFO L226 Difference]: Without dead ends: 5259 [2022-03-17 23:20:16,069 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 23:20:16,070 INFO L912 BasicCegarLoop]: 95 mSDtfsCounter, 211 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:20:16,070 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 102 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:20:16,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5259 states. [2022-03-17 23:20:16,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5259 to 4105. [2022-03-17 23:20:16,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4105 states, 4101 states have (on average 1.6005852231163131) internal successors, (6564), 4101 states have internal predecessors, (6564), 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 23:20:16,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4105 states to 4105 states and 6567 transitions. [2022-03-17 23:20:16,175 INFO L78 Accepts]: Start accepts. Automaton has 4105 states and 6567 transitions. Word has length 32 [2022-03-17 23:20:16,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:20:16,175 INFO L478 AbstractCegarLoop]: Abstraction has 4105 states and 6567 transitions. [2022-03-17 23:20:16,175 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 23:20:16,175 INFO L276 IsEmpty]: Start isEmpty. Operand 4105 states and 6567 transitions. [2022-03-17 23:20:16,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-17 23:20:16,179 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:20:16,179 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, 1, 1, 1] [2022-03-17 23:20:16,179 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-03-17 23:20:16,179 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:20:16,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:20:16,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1829055019, now seen corresponding path program 1 times [2022-03-17 23:20:16,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:20:16,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504452163] [2022-03-17 23:20:16,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:20:16,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:20:16,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:16,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:20:16,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:16,199 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 23:20:16,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:20:16,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504452163] [2022-03-17 23:20:16,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504452163] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:20:16,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:20:16,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:20:16,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64266714] [2022-03-17 23:20:16,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:20:16,200 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:20:16,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:20:16,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:20:16,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:20:16,201 INFO L87 Difference]: Start difference. First operand 4105 states and 6567 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 23:20:16,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:20:16,321 INFO L93 Difference]: Finished difference Result 9677 states and 15593 transitions. [2022-03-17 23:20:16,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:20:16,322 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 23:20:16,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:20:16,345 INFO L225 Difference]: With dead ends: 9677 [2022-03-17 23:20:16,345 INFO L226 Difference]: Without dead ends: 5643 [2022-03-17 23:20:16,351 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 23:20:16,352 INFO L912 BasicCegarLoop]: 140 mSDtfsCounter, 187 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:20:16,352 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 147 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:20:16,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5643 states. [2022-03-17 23:20:16,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5643 to 5641. [2022-03-17 23:20:16,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5641 states, 5637 states have (on average 1.6015611140677666) internal successors, (9028), 5637 states have internal predecessors, (9028), 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 23:20:16,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5641 states to 5641 states and 9031 transitions. [2022-03-17 23:20:16,478 INFO L78 Accepts]: Start accepts. Automaton has 5641 states and 9031 transitions. Word has length 32 [2022-03-17 23:20:16,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:20:16,479 INFO L478 AbstractCegarLoop]: Abstraction has 5641 states and 9031 transitions. [2022-03-17 23:20:16,479 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 23:20:16,479 INFO L276 IsEmpty]: Start isEmpty. Operand 5641 states and 9031 transitions. [2022-03-17 23:20:16,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-17 23:20:16,485 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:20:16,485 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 23:20:16,485 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-03-17 23:20:16,486 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:20:16,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:20:16,486 INFO L85 PathProgramCache]: Analyzing trace with hash -21626014, now seen corresponding path program 1 times [2022-03-17 23:20:16,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:20:16,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279269223] [2022-03-17 23:20:16,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:20:16,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:20:16,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:16,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:20:16,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:16,506 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 23:20:16,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:20:16,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279269223] [2022-03-17 23:20:16,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279269223] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:20:16,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:20:16,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:20:16,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360715996] [2022-03-17 23:20:16,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:20:16,507 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:20:16,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:20:16,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:20:16,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:20:16,508 INFO L87 Difference]: Start difference. First operand 5641 states and 9031 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 23:20:16,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:20:16,614 INFO L93 Difference]: Finished difference Result 8461 states and 13513 transitions. [2022-03-17 23:20:16,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:20:16,614 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 23:20:16,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:20:16,623 INFO L225 Difference]: With dead ends: 8461 [2022-03-17 23:20:16,624 INFO L226 Difference]: Without dead ends: 5707 [2022-03-17 23:20:16,629 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 23:20:16,630 INFO L912 BasicCegarLoop]: 138 mSDtfsCounter, 190 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:20:16,631 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 145 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:20:16,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5707 states. [2022-03-17 23:20:16,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5707 to 5705. [2022-03-17 23:20:16,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5705 states, 5701 states have (on average 1.5835818277495177) internal successors, (9028), 5701 states have internal predecessors, (9028), 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 23:20:16,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5705 states to 5705 states and 9031 transitions. [2022-03-17 23:20:16,747 INFO L78 Accepts]: Start accepts. Automaton has 5705 states and 9031 transitions. Word has length 33 [2022-03-17 23:20:16,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:20:16,747 INFO L478 AbstractCegarLoop]: Abstraction has 5705 states and 9031 transitions. [2022-03-17 23:20:16,747 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 23:20:16,748 INFO L276 IsEmpty]: Start isEmpty. Operand 5705 states and 9031 transitions. [2022-03-17 23:20:16,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-17 23:20:16,751 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:20:16,751 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 23:20:16,751 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-03-17 23:20:16,752 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:20:16,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:20:16,752 INFO L85 PathProgramCache]: Analyzing trace with hash -866097885, now seen corresponding path program 1 times [2022-03-17 23:20:16,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:20:16,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94619469] [2022-03-17 23:20:16,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:20:16,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:20:16,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:16,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:20:16,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:16,771 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 23:20:16,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:20:16,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94619469] [2022-03-17 23:20:16,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94619469] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:20:16,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:20:16,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:20:16,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003335853] [2022-03-17 23:20:16,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:20:16,771 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:20:16,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:20:16,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:20:16,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:20:16,772 INFO L87 Difference]: Start difference. First operand 5705 states and 9031 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 23:20:16,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:20:16,893 INFO L93 Difference]: Finished difference Result 10253 states and 16585 transitions. [2022-03-17 23:20:16,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:20:16,894 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 23:20:16,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:20:16,910 INFO L225 Difference]: With dead ends: 10253 [2022-03-17 23:20:16,911 INFO L226 Difference]: Without dead ends: 10251 [2022-03-17 23:20:16,916 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 23:20:16,916 INFO L912 BasicCegarLoop]: 94 mSDtfsCounter, 204 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:20:16,916 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 101 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:20:16,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10251 states. [2022-03-17 23:20:17,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10251 to 8201. [2022-03-17 23:20:17,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8201 states, 8197 states have (on average 1.5386116872026352) internal successors, (12612), 8197 states have internal predecessors, (12612), 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 23:20:17,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8201 states to 8201 states and 12615 transitions. [2022-03-17 23:20:17,087 INFO L78 Accepts]: Start accepts. Automaton has 8201 states and 12615 transitions. Word has length 33 [2022-03-17 23:20:17,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:20:17,087 INFO L478 AbstractCegarLoop]: Abstraction has 8201 states and 12615 transitions. [2022-03-17 23:20:17,087 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 23:20:17,087 INFO L276 IsEmpty]: Start isEmpty. Operand 8201 states and 12615 transitions. [2022-03-17 23:20:17,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-17 23:20:17,094 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:20:17,094 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 23:20:17,094 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-03-17 23:20:17,095 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:20:17,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:20:17,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1863170238, now seen corresponding path program 1 times [2022-03-17 23:20:17,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:20:17,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50215892] [2022-03-17 23:20:17,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:20:17,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:20:17,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:17,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:20:17,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:17,114 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 23:20:17,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:20:17,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50215892] [2022-03-17 23:20:17,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50215892] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:20:17,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:20:17,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:20:17,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685535582] [2022-03-17 23:20:17,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:20:17,115 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:20:17,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:20:17,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:20:17,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:20:17,116 INFO L87 Difference]: Start difference. First operand 8201 states and 12615 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 23:20:17,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:20:17,255 INFO L93 Difference]: Finished difference Result 19213 states and 29769 transitions. [2022-03-17 23:20:17,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:20:17,255 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 23:20:17,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:20:17,273 INFO L225 Difference]: With dead ends: 19213 [2022-03-17 23:20:17,273 INFO L226 Difference]: Without dead ends: 11147 [2022-03-17 23:20:17,289 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 23:20:17,290 INFO L912 BasicCegarLoop]: 142 mSDtfsCounter, 181 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:20:17,290 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 149 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:20:17,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11147 states. [2022-03-17 23:20:17,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11147 to 11145. [2022-03-17 23:20:17,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11145 states, 11141 states have (on average 1.5398976752535678) internal successors, (17156), 11141 states have internal predecessors, (17156), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:20:17,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11145 states to 11145 states and 17159 transitions. [2022-03-17 23:20:17,522 INFO L78 Accepts]: Start accepts. Automaton has 11145 states and 17159 transitions. Word has length 33 [2022-03-17 23:20:17,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:20:17,522 INFO L478 AbstractCegarLoop]: Abstraction has 11145 states and 17159 transitions. [2022-03-17 23:20:17,523 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 23:20:17,523 INFO L276 IsEmpty]: Start isEmpty. Operand 11145 states and 17159 transitions. [2022-03-17 23:20:17,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-17 23:20:17,530 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:20:17,530 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 23:20:17,530 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-03-17 23:20:17,530 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:20:17,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:20:17,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1079197679, now seen corresponding path program 1 times [2022-03-17 23:20:17,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:20:17,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217978380] [2022-03-17 23:20:17,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:20:17,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:20:17,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:17,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:20:17,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:17,553 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 23:20:17,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:20:17,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217978380] [2022-03-17 23:20:17,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217978380] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:20:17,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:20:17,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:20:17,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70072665] [2022-03-17 23:20:17,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:20:17,554 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:20:17,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:20:17,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:20:17,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:20:17,555 INFO L87 Difference]: Start difference. First operand 11145 states and 17159 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 23:20:17,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:20:17,687 INFO L93 Difference]: Finished difference Result 16717 states and 25673 transitions. [2022-03-17 23:20:17,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:20:17,687 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 23:20:17,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:20:17,705 INFO L225 Difference]: With dead ends: 16717 [2022-03-17 23:20:17,705 INFO L226 Difference]: Without dead ends: 11275 [2022-03-17 23:20:17,717 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 23:20:17,718 INFO L912 BasicCegarLoop]: 135 mSDtfsCounter, 189 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:20:17,718 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 142 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:20:17,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11275 states. [2022-03-17 23:20:17,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11275 to 11273. [2022-03-17 23:20:17,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11273 states, 11269 states have (on average 1.5224066021829799) internal successors, (17156), 11269 states have internal predecessors, (17156), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:20:17,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11273 states to 11273 states and 17159 transitions. [2022-03-17 23:20:17,987 INFO L78 Accepts]: Start accepts. Automaton has 11273 states and 17159 transitions. Word has length 34 [2022-03-17 23:20:17,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:20:17,987 INFO L478 AbstractCegarLoop]: Abstraction has 11273 states and 17159 transitions. [2022-03-17 23:20:17,987 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 23:20:17,988 INFO L276 IsEmpty]: Start isEmpty. Operand 11273 states and 17159 transitions. [2022-03-17 23:20:17,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-17 23:20:17,995 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:20:17,995 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 23:20:17,995 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-03-17 23:20:17,996 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:20:17,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:20:17,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1923669550, now seen corresponding path program 1 times [2022-03-17 23:20:17,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:20:17,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7225983] [2022-03-17 23:20:17,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:20:17,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:20:18,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:18,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:20:18,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:18,022 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 23:20:18,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:20:18,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7225983] [2022-03-17 23:20:18,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7225983] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:20:18,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:20:18,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:20:18,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233560841] [2022-03-17 23:20:18,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:20:18,023 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:20:18,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:20:18,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:20:18,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:20:18,023 INFO L87 Difference]: Start difference. First operand 11273 states and 17159 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 23:20:18,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:20:18,256 INFO L93 Difference]: Finished difference Result 19981 states and 31113 transitions. [2022-03-17 23:20:18,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:20:18,256 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 23:20:18,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:20:18,289 INFO L225 Difference]: With dead ends: 19981 [2022-03-17 23:20:18,289 INFO L226 Difference]: Without dead ends: 19979 [2022-03-17 23:20:18,294 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 23:20:18,294 INFO L912 BasicCegarLoop]: 93 mSDtfsCounter, 197 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:20:18,295 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 100 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:20:18,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19979 states. [2022-03-17 23:20:18,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19979 to 16393. [2022-03-17 23:20:18,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16393 states, 16389 states have (on average 1.4763560925010677) internal successors, (24196), 16389 states have internal predecessors, (24196), 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 23:20:18,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16393 states to 16393 states and 24199 transitions. [2022-03-17 23:20:18,580 INFO L78 Accepts]: Start accepts. Automaton has 16393 states and 24199 transitions. Word has length 34 [2022-03-17 23:20:18,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:20:18,580 INFO L478 AbstractCegarLoop]: Abstraction has 16393 states and 24199 transitions. [2022-03-17 23:20:18,580 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 23:20:18,580 INFO L276 IsEmpty]: Start isEmpty. Operand 16393 states and 24199 transitions. [2022-03-17 23:20:18,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-17 23:20:18,594 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:20:18,594 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 23:20:18,594 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-03-17 23:20:18,594 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:20:18,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:20:18,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1374225393, now seen corresponding path program 1 times [2022-03-17 23:20:18,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:20:18,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724635448] [2022-03-17 23:20:18,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:20:18,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:20:18,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:18,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:20:18,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:18,613 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 23:20:18,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:20:18,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724635448] [2022-03-17 23:20:18,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724635448] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:20:18,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:20:18,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:20:18,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201796466] [2022-03-17 23:20:18,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:20:18,614 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:20:18,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:20:18,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:20:18,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:20:18,614 INFO L87 Difference]: Start difference. First operand 16393 states and 24199 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 23:20:18,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:20:18,823 INFO L93 Difference]: Finished difference Result 38157 states and 56713 transitions. [2022-03-17 23:20:18,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:20:18,823 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 23:20:18,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:20:18,856 INFO L225 Difference]: With dead ends: 38157 [2022-03-17 23:20:18,856 INFO L226 Difference]: Without dead ends: 22027 [2022-03-17 23:20:18,953 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 23:20:18,953 INFO L912 BasicCegarLoop]: 144 mSDtfsCounter, 175 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:20:18,956 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 151 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:20:18,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22027 states. [2022-03-17 23:20:19,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22027 to 22025. [2022-03-17 23:20:19,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22025 states, 22021 states have (on average 1.4765905272240134) internal successors, (32516), 22021 states have internal predecessors, (32516), 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 23:20:19,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22025 states to 22025 states and 32519 transitions. [2022-03-17 23:20:19,305 INFO L78 Accepts]: Start accepts. Automaton has 22025 states and 32519 transitions. Word has length 34 [2022-03-17 23:20:19,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:20:19,306 INFO L478 AbstractCegarLoop]: Abstraction has 22025 states and 32519 transitions. [2022-03-17 23:20:19,306 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 23:20:19,306 INFO L276 IsEmpty]: Start isEmpty. Operand 22025 states and 32519 transitions. [2022-03-17 23:20:19,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-17 23:20:19,321 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:20:19,321 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, 1] [2022-03-17 23:20:19,321 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-03-17 23:20:19,321 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:20:19,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:20:19,321 INFO L85 PathProgramCache]: Analyzing trace with hash 495819198, now seen corresponding path program 1 times [2022-03-17 23:20:19,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:20:19,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289514541] [2022-03-17 23:20:19,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:20:19,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:20:19,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:19,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:20:19,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:19,345 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 23:20:19,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:20:19,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289514541] [2022-03-17 23:20:19,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289514541] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:20:19,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:20:19,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:20:19,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533282616] [2022-03-17 23:20:19,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:20:19,346 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:20:19,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:20:19,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:20:19,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:20:19,347 INFO L87 Difference]: Start difference. First operand 22025 states and 32519 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:20:19,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:20:19,569 INFO L93 Difference]: Finished difference Result 33037 states and 48649 transitions. [2022-03-17 23:20:19,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:20:19,570 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-03-17 23:20:19,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:20:19,603 INFO L225 Difference]: With dead ends: 33037 [2022-03-17 23:20:19,603 INFO L226 Difference]: Without dead ends: 22283 [2022-03-17 23:20:19,621 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 23:20:19,622 INFO L912 BasicCegarLoop]: 132 mSDtfsCounter, 188 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:20:19,623 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 139 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:20:19,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22283 states. [2022-03-17 23:20:19,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22283 to 22281. [2022-03-17 23:20:20,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22281 states, 22277 states have (on average 1.4596220316918795) internal successors, (32516), 22277 states have internal predecessors, (32516), 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 23:20:20,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22281 states to 22281 states and 32519 transitions. [2022-03-17 23:20:20,033 INFO L78 Accepts]: Start accepts. Automaton has 22281 states and 32519 transitions. Word has length 35 [2022-03-17 23:20:20,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:20:20,033 INFO L478 AbstractCegarLoop]: Abstraction has 22281 states and 32519 transitions. [2022-03-17 23:20:20,033 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:20:20,033 INFO L276 IsEmpty]: Start isEmpty. Operand 22281 states and 32519 transitions. [2022-03-17 23:20:20,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-17 23:20:20,047 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:20:20,047 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, 1] [2022-03-17 23:20:20,047 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-03-17 23:20:20,048 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:20:20,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:20:20,048 INFO L85 PathProgramCache]: Analyzing trace with hash -348652673, now seen corresponding path program 1 times [2022-03-17 23:20:20,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:20:20,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496622845] [2022-03-17 23:20:20,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:20:20,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:20:20,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:20,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:20:20,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:20,074 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 23:20:20,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:20:20,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496622845] [2022-03-17 23:20:20,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496622845] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:20:20,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:20:20,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:20:20,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229485476] [2022-03-17 23:20:20,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:20:20,074 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:20:20,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:20:20,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:20:20,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:20:20,075 INFO L87 Difference]: Start difference. First operand 22281 states and 32519 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:20:20,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:20:20,493 INFO L93 Difference]: Finished difference Result 65293 states and 94473 transitions. [2022-03-17 23:20:20,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:20:20,493 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-03-17 23:20:20,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:20:20,561 INFO L225 Difference]: With dead ends: 65293 [2022-03-17 23:20:20,561 INFO L226 Difference]: Without dead ends: 43531 [2022-03-17 23:20:20,589 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 23:20:20,590 INFO L912 BasicCegarLoop]: 110 mSDtfsCounter, 208 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:20:20,591 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 117 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:20:20,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43531 states. [2022-03-17 23:20:21,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43531 to 43529. [2022-03-17 23:20:21,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43529 states, 43525 states have (on average 1.4234577828834003) internal successors, (61956), 43525 states have internal predecessors, (61956), 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 23:20:21,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43529 states to 43529 states and 61959 transitions. [2022-03-17 23:20:21,237 INFO L78 Accepts]: Start accepts. Automaton has 43529 states and 61959 transitions. Word has length 35 [2022-03-17 23:20:21,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:20:21,237 INFO L478 AbstractCegarLoop]: Abstraction has 43529 states and 61959 transitions. [2022-03-17 23:20:21,237 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:20:21,237 INFO L276 IsEmpty]: Start isEmpty. Operand 43529 states and 61959 transitions. [2022-03-17 23:20:21,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-17 23:20:21,259 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:20:21,259 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, 1] [2022-03-17 23:20:21,259 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-03-17 23:20:21,259 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:20:21,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:20:21,260 INFO L85 PathProgramCache]: Analyzing trace with hash 648419680, now seen corresponding path program 1 times [2022-03-17 23:20:21,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:20:21,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373206576] [2022-03-17 23:20:21,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:20:21,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:20:21,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:21,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:20:21,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:21,281 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 23:20:21,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:20:21,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373206576] [2022-03-17 23:20:21,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373206576] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:20:21,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:20:21,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:20:21,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507895335] [2022-03-17 23:20:21,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:20:21,281 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:20:21,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:20:21,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:20:21,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:20:21,282 INFO L87 Difference]: Start difference. First operand 43529 states and 61959 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:20:21,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:20:21,791 INFO L93 Difference]: Finished difference Result 49677 states and 73225 transitions. [2022-03-17 23:20:21,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:20:21,791 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-03-17 23:20:21,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:20:21,869 INFO L225 Difference]: With dead ends: 49677 [2022-03-17 23:20:21,869 INFO L226 Difference]: Without dead ends: 49675 [2022-03-17 23:20:21,879 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 23:20:21,880 INFO L912 BasicCegarLoop]: 149 mSDtfsCounter, 129 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:20:21,880 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 156 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:20:21,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49675 states. [2022-03-17 23:20:22,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49675 to 43529. [2022-03-17 23:20:22,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43529 states, 43525 states have (on average 1.411694428489374) internal successors, (61444), 43525 states have internal predecessors, (61444), 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 23:20:22,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43529 states to 43529 states and 61447 transitions. [2022-03-17 23:20:22,600 INFO L78 Accepts]: Start accepts. Automaton has 43529 states and 61447 transitions. Word has length 35 [2022-03-17 23:20:22,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:20:22,601 INFO L478 AbstractCegarLoop]: Abstraction has 43529 states and 61447 transitions. [2022-03-17 23:20:22,601 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:20:22,601 INFO L276 IsEmpty]: Start isEmpty. Operand 43529 states and 61447 transitions. [2022-03-17 23:20:22,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-17 23:20:22,619 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:20:22,619 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, 1, 1] [2022-03-17 23:20:22,619 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-03-17 23:20:22,619 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:20:22,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:20:22,619 INFO L85 PathProgramCache]: Analyzing trace with hash 2076702253, now seen corresponding path program 1 times [2022-03-17 23:20:22,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:20:22,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47468642] [2022-03-17 23:20:22,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:20:22,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:20:22,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:22,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:20:22,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:22,639 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 23:20:22,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:20:22,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47468642] [2022-03-17 23:20:22,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47468642] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:20:22,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:20:22,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:20:22,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986549958] [2022-03-17 23:20:22,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:20:22,640 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:20:22,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:20:22,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:20:22,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:20:22,640 INFO L87 Difference]: Start difference. First operand 43529 states and 61447 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:20:23,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:20:23,357 INFO L93 Difference]: Finished difference Result 75277 states and 108553 transitions. [2022-03-17 23:20:23,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:20:23,358 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-03-17 23:20:23,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:20:23,465 INFO L225 Difference]: With dead ends: 75277 [2022-03-17 23:20:23,465 INFO L226 Difference]: Without dead ends: 75275 [2022-03-17 23:20:23,479 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 23:20:23,480 INFO L912 BasicCegarLoop]: 91 mSDtfsCounter, 183 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:20:23,480 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 98 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:20:23,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75275 states. [2022-03-17 23:20:24,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75275 to 65033. [2022-03-17 23:20:24,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65033 states, 65029 states have (on average 1.3700349075028064) internal successors, (89092), 65029 states have internal predecessors, (89092), 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 23:20:24,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65033 states to 65033 states and 89095 transitions. [2022-03-17 23:20:24,457 INFO L78 Accepts]: Start accepts. Automaton has 65033 states and 89095 transitions. Word has length 36 [2022-03-17 23:20:24,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:20:24,457 INFO L478 AbstractCegarLoop]: Abstraction has 65033 states and 89095 transitions. [2022-03-17 23:20:24,457 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:20:24,457 INFO L276 IsEmpty]: Start isEmpty. Operand 65033 states and 89095 transitions. [2022-03-17 23:20:24,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-17 23:20:24,492 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:20:24,492 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, 1, 1] [2022-03-17 23:20:24,492 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-03-17 23:20:24,492 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:20:24,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:20:24,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1079629900, now seen corresponding path program 1 times [2022-03-17 23:20:24,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:20:24,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104717344] [2022-03-17 23:20:24,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:20:24,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:20:24,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:24,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:20:24,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:24,512 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 23:20:24,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:20:24,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104717344] [2022-03-17 23:20:24,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104717344] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:20:24,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:20:24,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:20:24,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146969854] [2022-03-17 23:20:24,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:20:24,513 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:20:24,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:20:24,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:20:24,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:20:24,514 INFO L87 Difference]: Start difference. First operand 65033 states and 89095 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:20:25,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:20:25,420 INFO L93 Difference]: Finished difference Result 150029 states and 206857 transitions. [2022-03-17 23:20:25,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:20:25,420 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-03-17 23:20:25,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:20:25,525 INFO L225 Difference]: With dead ends: 150029 [2022-03-17 23:20:25,526 INFO L226 Difference]: Without dead ends: 85515 [2022-03-17 23:20:25,586 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 23:20:25,587 INFO L912 BasicCegarLoop]: 148 mSDtfsCounter, 163 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:20:25,587 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 155 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:20:25,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85515 states. [2022-03-17 23:20:26,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85515 to 85513. [2022-03-17 23:20:26,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85513 states, 85509 states have (on average 1.3652364078634998) internal successors, (116740), 85509 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 23:20:27,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85513 states to 85513 states and 116743 transitions. [2022-03-17 23:20:27,034 INFO L78 Accepts]: Start accepts. Automaton has 85513 states and 116743 transitions. Word has length 36 [2022-03-17 23:20:27,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:20:27,034 INFO L478 AbstractCegarLoop]: Abstraction has 85513 states and 116743 transitions. [2022-03-17 23:20:27,034 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:20:27,034 INFO L276 IsEmpty]: Start isEmpty. Operand 85513 states and 116743 transitions. [2022-03-17 23:20:27,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-17 23:20:27,071 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:20:27,071 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, 1, 1, 1] [2022-03-17 23:20:27,071 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-03-17 23:20:27,071 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:20:27,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:20:27,072 INFO L85 PathProgramCache]: Analyzing trace with hash -46706245, now seen corresponding path program 1 times [2022-03-17 23:20:27,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:20:27,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503882100] [2022-03-17 23:20:27,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:20:27,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:20:27,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:27,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:20:27,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:27,090 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 23:20:27,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:20:27,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503882100] [2022-03-17 23:20:27,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503882100] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:20:27,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:20:27,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:20:27,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54740761] [2022-03-17 23:20:27,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:20:27,091 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:20:27,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:20:27,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:20:27,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:20:27,092 INFO L87 Difference]: Start difference. First operand 85513 states and 116743 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:20:27,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:20:27,962 INFO L93 Difference]: Finished difference Result 129037 states and 176137 transitions. [2022-03-17 23:20:27,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:20:27,963 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-03-17 23:20:27,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:20:28,086 INFO L225 Difference]: With dead ends: 129037 [2022-03-17 23:20:28,087 INFO L226 Difference]: Without dead ends: 87051 [2022-03-17 23:20:28,128 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 23:20:28,129 INFO L912 BasicCegarLoop]: 126 mSDtfsCounter, 186 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:20:28,129 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 133 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:20:28,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87051 states. [2022-03-17 23:20:29,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87051 to 87049. [2022-03-17 23:20:29,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87049 states, 87045 states have (on average 1.3529094146705727) internal successors, (117764), 87045 states have internal predecessors, (117764), 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 23:20:29,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87049 states to 87049 states and 117767 transitions. [2022-03-17 23:20:29,585 INFO L78 Accepts]: Start accepts. Automaton has 87049 states and 117767 transitions. Word has length 37 [2022-03-17 23:20:29,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:20:29,586 INFO L478 AbstractCegarLoop]: Abstraction has 87049 states and 117767 transitions. [2022-03-17 23:20:29,586 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:20:29,586 INFO L276 IsEmpty]: Start isEmpty. Operand 87049 states and 117767 transitions. [2022-03-17 23:20:29,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-17 23:20:29,622 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:20:29,622 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, 1, 1, 1] [2022-03-17 23:20:29,622 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-03-17 23:20:29,622 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:20:29,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:20:29,622 INFO L85 PathProgramCache]: Analyzing trace with hash -891178116, now seen corresponding path program 1 times [2022-03-17 23:20:29,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:20:29,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754752509] [2022-03-17 23:20:29,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:20:29,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:20:29,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:29,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:20:29,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:29,641 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 23:20:29,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:20:29,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754752509] [2022-03-17 23:20:29,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754752509] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:20:29,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:20:29,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:20:29,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200212096] [2022-03-17 23:20:29,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:20:29,642 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:20:29,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:20:29,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:20:29,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:20:29,643 INFO L87 Difference]: Start difference. First operand 87049 states and 117767 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:20:30,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:20:30,915 INFO L93 Difference]: Finished difference Result 147469 states and 202761 transitions. [2022-03-17 23:20:30,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:20:30,916 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-03-17 23:20:30,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:20:31,099 INFO L225 Difference]: With dead ends: 147469 [2022-03-17 23:20:31,100 INFO L226 Difference]: Without dead ends: 147467 [2022-03-17 23:20:31,126 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 23:20:31,126 INFO L912 BasicCegarLoop]: 90 mSDtfsCounter, 176 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:20:31,126 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 97 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:20:31,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147467 states. [2022-03-17 23:20:32,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147467 to 131081. [2022-03-17 23:20:32,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131081 states, 131077 states have (on average 1.312480450422271) internal successors, (172036), 131077 states have internal predecessors, (172036), 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 23:20:33,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131081 states to 131081 states and 172039 transitions. [2022-03-17 23:20:33,265 INFO L78 Accepts]: Start accepts. Automaton has 131081 states and 172039 transitions. Word has length 37 [2022-03-17 23:20:33,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:20:33,265 INFO L478 AbstractCegarLoop]: Abstraction has 131081 states and 172039 transitions. [2022-03-17 23:20:33,265 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:20:33,265 INFO L276 IsEmpty]: Start isEmpty. Operand 131081 states and 172039 transitions. [2022-03-17 23:20:33,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-17 23:20:33,348 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:20:33,348 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, 1, 1, 1] [2022-03-17 23:20:33,348 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-03-17 23:20:33,348 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:20:33,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:20:33,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1888250469, now seen corresponding path program 1 times [2022-03-17 23:20:33,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:20:33,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592688653] [2022-03-17 23:20:33,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:20:33,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:20:33,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:33,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:20:33,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:33,366 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 23:20:33,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:20:33,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592688653] [2022-03-17 23:20:33,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592688653] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:20:33,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:20:33,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:20:33,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844559808] [2022-03-17 23:20:33,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:20:33,367 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:20:33,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:20:33,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:20:33,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:20:33,367 INFO L87 Difference]: Start difference. First operand 131081 states and 172039 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:20:34,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:20:34,989 INFO L93 Difference]: Finished difference Result 299021 states and 393225 transitions. [2022-03-17 23:20:34,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:20:34,989 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-03-17 23:20:34,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:20:35,202 INFO L225 Difference]: With dead ends: 299021 [2022-03-17 23:20:35,202 INFO L226 Difference]: Without dead ends: 169995 [2022-03-17 23:20:35,314 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 23:20:35,315 INFO L912 BasicCegarLoop]: 150 mSDtfsCounter, 157 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:20:35,315 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 157 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:20:35,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169995 states. [2022-03-17 23:20:37,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169995 to 169993. [2022-03-17 23:20:37,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169993 states, 169989 states have (on average 1.3011900770049827) internal successors, (221188), 169989 states have internal predecessors, (221188), 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 23:20:38,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169993 states to 169993 states and 221191 transitions. [2022-03-17 23:20:38,251 INFO L78 Accepts]: Start accepts. Automaton has 169993 states and 221191 transitions. Word has length 37 [2022-03-17 23:20:38,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:20:38,251 INFO L478 AbstractCegarLoop]: Abstraction has 169993 states and 221191 transitions. [2022-03-17 23:20:38,251 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:20:38,251 INFO L276 IsEmpty]: Start isEmpty. Operand 169993 states and 221191 transitions. [2022-03-17 23:20:38,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-17 23:20:38,331 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:20:38,331 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, 1, 1, 1, 1] [2022-03-17 23:20:38,332 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-03-17 23:20:38,332 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:20:38,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:20:38,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1856684344, now seen corresponding path program 1 times [2022-03-17 23:20:38,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:20:38,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493918184] [2022-03-17 23:20:38,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:20:38,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:20:38,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:38,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:20:38,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:38,362 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 23:20:38,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:20:38,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493918184] [2022-03-17 23:20:38,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493918184] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:20:38,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:20:38,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:20:38,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474374353] [2022-03-17 23:20:38,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:20:38,363 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:20:38,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:20:38,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:20:38,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:20:38,364 INFO L87 Difference]: Start difference. First operand 169993 states and 221191 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (2), 2 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 23:20:40,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:20:40,047 INFO L93 Difference]: Finished difference Result 254989 states and 330761 transitions. [2022-03-17 23:20:40,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:20:40,049 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (2), 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 38 [2022-03-17 23:20:40,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:20:40,296 INFO L225 Difference]: With dead ends: 254989 [2022-03-17 23:20:40,296 INFO L226 Difference]: Without dead ends: 172043 [2022-03-17 23:20:40,382 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 23:20:40,384 INFO L912 BasicCegarLoop]: 123 mSDtfsCounter, 185 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:20:40,384 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 130 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:20:40,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172043 states. [2022-03-17 23:20:42,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172043 to 172041. [2022-03-17 23:20:42,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172041 states, 172037 states have (on average 1.2857001691496597) internal successors, (221188), 172037 states have internal predecessors, (221188), 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 23:20:43,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172041 states to 172041 states and 221191 transitions. [2022-03-17 23:20:43,092 INFO L78 Accepts]: Start accepts. Automaton has 172041 states and 221191 transitions. Word has length 38 [2022-03-17 23:20:43,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:20:43,092 INFO L478 AbstractCegarLoop]: Abstraction has 172041 states and 221191 transitions. [2022-03-17 23:20:43,092 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (2), 2 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 23:20:43,092 INFO L276 IsEmpty]: Start isEmpty. Operand 172041 states and 221191 transitions. [2022-03-17 23:20:43,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-17 23:20:43,162 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:20:43,162 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, 1, 1, 1, 1] [2022-03-17 23:20:43,163 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-03-17 23:20:43,163 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:20:43,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:20:43,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1593811081, now seen corresponding path program 1 times [2022-03-17 23:20:43,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:20:43,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954158121] [2022-03-17 23:20:43,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:20:43,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:20:43,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:43,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:20:43,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:43,186 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 23:20:43,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:20:43,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954158121] [2022-03-17 23:20:43,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954158121] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:20:43,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:20:43,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:20:43,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066003118] [2022-03-17 23:20:43,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:20:43,186 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:20:43,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:20:43,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:20:43,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:20:43,187 INFO L87 Difference]: Start difference. First operand 172041 states and 221191 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (2), 2 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 23:20:45,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:20:45,540 INFO L93 Difference]: Finished difference Result 286733 states and 372745 transitions. [2022-03-17 23:20:45,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:20:45,541 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (2), 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 38 [2022-03-17 23:20:45,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:20:46,079 INFO L225 Difference]: With dead ends: 286733 [2022-03-17 23:20:46,079 INFO L226 Difference]: Without dead ends: 286731 [2022-03-17 23:20:46,116 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 23:20:46,117 INFO L912 BasicCegarLoop]: 89 mSDtfsCounter, 169 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:20:46,117 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 96 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:20:46,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286731 states. [2022-03-17 23:20:49,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286731 to 262153. [2022-03-17 23:20:49,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262153 states, 262149 states have (on average 1.2499914170948583) internal successors, (327684), 262149 states have internal predecessors, (327684), 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 23:20:50,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262153 states to 262153 states and 327687 transitions. [2022-03-17 23:20:50,095 INFO L78 Accepts]: Start accepts. Automaton has 262153 states and 327687 transitions. Word has length 38 [2022-03-17 23:20:50,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:20:50,095 INFO L478 AbstractCegarLoop]: Abstraction has 262153 states and 327687 transitions. [2022-03-17 23:20:50,095 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (2), 2 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 23:20:50,095 INFO L276 IsEmpty]: Start isEmpty. Operand 262153 states and 327687 transitions. [2022-03-17 23:20:50,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-17 23:20:50,283 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:20:50,283 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, 1, 1, 1, 1] [2022-03-17 23:20:50,283 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-03-17 23:20:50,284 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:20:50,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:20:50,284 INFO L85 PathProgramCache]: Analyzing trace with hash 596738728, now seen corresponding path program 1 times [2022-03-17 23:20:50,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:20:50,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121756291] [2022-03-17 23:20:50,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:20:50,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:20:50,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:50,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:20:50,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:50,301 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 23:20:50,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:20:50,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121756291] [2022-03-17 23:20:50,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121756291] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:20:50,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:20:50,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:20:50,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918469966] [2022-03-17 23:20:50,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:20:50,301 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:20:50,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:20:50,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:20:50,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:20:50,302 INFO L87 Difference]: Start difference. First operand 262153 states and 327687 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (2), 2 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 23:20:53,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:20:53,701 INFO L93 Difference]: Finished difference Result 593933 states and 741385 transitions. [2022-03-17 23:20:53,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:20:53,702 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (2), 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 38 [2022-03-17 23:20:53,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:20:54,240 INFO L225 Difference]: With dead ends: 593933 [2022-03-17 23:20:54,241 INFO L226 Difference]: Without dead ends: 335883 [2022-03-17 23:20:54,694 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 23:20:54,695 INFO L912 BasicCegarLoop]: 152 mSDtfsCounter, 151 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:20:54,695 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 159 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:20:54,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335883 states. [2022-03-17 23:20:59,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335883 to 335881. [2022-03-17 23:20:59,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335881 states, 335877 states have (on average 1.2317008905045597) internal successors, (413700), 335877 states have internal predecessors, (413700), 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 23:21:00,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335881 states to 335881 states and 413703 transitions. [2022-03-17 23:21:00,296 INFO L78 Accepts]: Start accepts. Automaton has 335881 states and 413703 transitions. Word has length 38 [2022-03-17 23:21:00,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:21:00,296 INFO L478 AbstractCegarLoop]: Abstraction has 335881 states and 413703 transitions. [2022-03-17 23:21:00,296 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (2), 2 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 23:21:00,296 INFO L276 IsEmpty]: Start isEmpty. Operand 335881 states and 413703 transitions. [2022-03-17 23:21:00,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-17 23:21:00,792 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:21:00,792 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, 1, 1, 1, 1, 1] [2022-03-17 23:21:00,792 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-03-17 23:21:00,792 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:21:00,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:21:00,793 INFO L85 PathProgramCache]: Analyzing trace with hash -2131430441, now seen corresponding path program 1 times [2022-03-17 23:21:00,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:21:00,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965660006] [2022-03-17 23:21:00,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:21:00,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:21:00,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:21:00,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:21:00,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:21:00,815 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 23:21:00,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:21:00,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965660006] [2022-03-17 23:21:00,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965660006] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:21:00,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:21:00,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:21:00,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226919703] [2022-03-17 23:21:00,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:21:00,816 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:21:00,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:21:00,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:21:00,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:21:00,817 INFO L87 Difference]: Start difference. First operand 335881 states and 413703 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (2), 2 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 23:21:03,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:21:03,734 INFO L93 Difference]: Finished difference Result 503821 states and 618505 transitions. [2022-03-17 23:21:03,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:21:03,735 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (2), 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 39 [2022-03-17 23:21:03,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:21:04,277 INFO L225 Difference]: With dead ends: 503821 [2022-03-17 23:21:04,278 INFO L226 Difference]: Without dead ends: 339979 [2022-03-17 23:21:04,661 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 23:21:04,661 INFO L912 BasicCegarLoop]: 120 mSDtfsCounter, 184 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:21:04,661 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 127 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:21:04,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339979 states. [2022-03-17 23:21:09,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339979 to 339977. [2022-03-17 23:21:09,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339977 states, 339973 states have (on average 1.2168613389886844) internal successors, (413700), 339973 states have internal predecessors, (413700), 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 23:21:10,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339977 states to 339977 states and 413703 transitions. [2022-03-17 23:21:10,174 INFO L78 Accepts]: Start accepts. Automaton has 339977 states and 413703 transitions. Word has length 39 [2022-03-17 23:21:10,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:21:10,174 INFO L478 AbstractCegarLoop]: Abstraction has 339977 states and 413703 transitions. [2022-03-17 23:21:10,174 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (2), 2 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 23:21:10,174 INFO L276 IsEmpty]: Start isEmpty. Operand 339977 states and 413703 transitions. [2022-03-17 23:21:10,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-17 23:21:10,697 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:21:10,697 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, 1, 1, 1, 1, 1] [2022-03-17 23:21:10,697 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-03-17 23:21:10,697 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:21:10,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:21:10,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1319064984, now seen corresponding path program 1 times [2022-03-17 23:21:10,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:21:10,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628758070] [2022-03-17 23:21:10,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:21:10,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:21:10,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:21:10,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:21:10,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:21:10,716 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 23:21:10,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:21:10,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628758070] [2022-03-17 23:21:10,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628758070] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:21:10,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:21:10,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:21:10,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361960042] [2022-03-17 23:21:10,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:21:10,717 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:21:10,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:21:10,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:21:10,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:21:10,718 INFO L87 Difference]: Start difference. First operand 339977 states and 413703 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (2), 2 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 23:21:15,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:21:15,131 INFO L93 Difference]: Finished difference Result 557069 states and 679945 transitions. [2022-03-17 23:21:15,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:21:15,131 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (2), 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 39 [2022-03-17 23:21:15,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:21:16,172 INFO L225 Difference]: With dead ends: 557069 [2022-03-17 23:21:16,173 INFO L226 Difference]: Without dead ends: 557067 [2022-03-17 23:21:16,246 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 23:21:16,247 INFO L912 BasicCegarLoop]: 88 mSDtfsCounter, 162 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:21:16,247 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 95 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:21:16,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557067 states. [2022-03-17 23:21:23,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557067 to 524297. [2022-03-17 23:21:23,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524297 states, 524293 states have (on average 1.1874963045472664) internal successors, (622596), 524293 states have internal predecessors, (622596), 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 23:21:24,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524297 states to 524297 states and 622599 transitions. [2022-03-17 23:21:24,940 INFO L78 Accepts]: Start accepts. Automaton has 524297 states and 622599 transitions. Word has length 39 [2022-03-17 23:21:24,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:21:24,940 INFO L478 AbstractCegarLoop]: Abstraction has 524297 states and 622599 transitions. [2022-03-17 23:21:24,940 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (2), 2 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 23:21:24,940 INFO L276 IsEmpty]: Start isEmpty. Operand 524297 states and 622599 transitions. [2022-03-17 23:21:25,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-17 23:21:25,370 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:21:25,371 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, 1, 1, 1, 1, 1] [2022-03-17 23:21:25,371 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-03-17 23:21:25,371 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:21:25,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:21:25,371 INFO L85 PathProgramCache]: Analyzing trace with hash 321992631, now seen corresponding path program 1 times [2022-03-17 23:21:25,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:21:25,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921512944] [2022-03-17 23:21:25,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:21:25,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:21:25,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:21:25,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:21:25,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:21:25,392 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 23:21:25,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:21:25,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921512944] [2022-03-17 23:21:25,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921512944] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:21:25,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:21:25,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:21:25,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552388872] [2022-03-17 23:21:25,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:21:25,393 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:21:25,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:21:25,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:21:25,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:21:25,394 INFO L87 Difference]: Start difference. First operand 524297 states and 622599 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (2), 2 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 23:21:32,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:21:32,590 INFO L93 Difference]: Finished difference Result 1179661 states and 1392649 transitions. [2022-03-17 23:21:32,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:21:32,590 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (2), 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 39 [2022-03-17 23:21:32,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:21:33,681 INFO L225 Difference]: With dead ends: 1179661 [2022-03-17 23:21:33,681 INFO L226 Difference]: Without dead ends: 663563 [2022-03-17 23:21:34,148 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 23:21:34,149 INFO L912 BasicCegarLoop]: 154 mSDtfsCounter, 145 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:21:34,149 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 161 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:21:34,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663563 states. [2022-03-17 23:21:44,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663563 to 663561. [2022-03-17 23:21:45,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663561 states, 663557 states have (on average 1.1604911107862625) internal successors, (770052), 663557 states have internal predecessors, (770052), 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 23:21:47,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663561 states to 663561 states and 770055 transitions. [2022-03-17 23:21:47,724 INFO L78 Accepts]: Start accepts. Automaton has 663561 states and 770055 transitions. Word has length 39 [2022-03-17 23:21:47,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:21:47,724 INFO L478 AbstractCegarLoop]: Abstraction has 663561 states and 770055 transitions. [2022-03-17 23:21:47,724 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (2), 2 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 23:21:47,724 INFO L276 IsEmpty]: Start isEmpty. Operand 663561 states and 770055 transitions. [2022-03-17 23:21:48,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-17 23:21:48,499 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:21:48,499 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, 1, 1, 1, 1, 1, 1] [2022-03-17 23:21:48,499 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-03-17 23:21:48,499 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:21:48,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:21:48,500 INFO L85 PathProgramCache]: Analyzing trace with hash -2058624732, now seen corresponding path program 1 times [2022-03-17 23:21:48,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:21:48,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138368501] [2022-03-17 23:21:48,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:21:48,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:21:48,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:21:48,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:21:48,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:21:48,517 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 23:21:48,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:21:48,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138368501] [2022-03-17 23:21:48,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138368501] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:21:48,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:21:48,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:21:48,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477224895] [2022-03-17 23:21:48,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:21:48,518 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:21:48,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:21:48,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:21:48,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:21:48,518 INFO L87 Difference]: Start difference. First operand 663561 states and 770055 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 1 states have call successors, (2), 2 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 23:21:55,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:21:55,007 INFO L93 Difference]: Finished difference Result 995341 states and 1150985 transitions. [2022-03-17 23:21:55,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:21:55,008 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 1 states have call successors, (2), 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 40 [2022-03-17 23:21:55,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:21:56,191 INFO L225 Difference]: With dead ends: 995341 [2022-03-17 23:21:56,191 INFO L226 Difference]: Without dead ends: 671755 [2022-03-17 23:21:56,694 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 23:21:56,695 INFO L912 BasicCegarLoop]: 117 mSDtfsCounter, 183 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-17 23:21:56,695 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 124 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-17 23:21:57,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671755 states.