/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/locks/test_locks_12.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 00:34:58,451 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 00:34:58,484 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 00:34:58,513 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-24 00:34:58,524 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-24 00:34:58,525 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-24 00:34:58,526 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-24 00:34:58,526 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-24 00:34:58,527 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-24 00:34:58,527 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-24 00:34:58,528 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-24 00:34:58,529 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-24 00:34:58,530 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-24 00:34:58,536 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-24 00:34:58,537 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-24 00:34:58,537 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-24 00:34:58,539 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-24 00:34:58,543 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-24 00:34:58,544 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-24 00:34:58,544 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-24 00:34:58,546 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-02-24 00:34:58,559 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 00:34:58,559 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 00:34:58,560 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-24 00:34:58,560 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-24 00:34:58,560 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-24 00:34:58,561 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-24 00:34:58,561 INFO L138 SettingsManager]: * Use SBE=true [2022-02-24 00:34:58,561 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 00:34:58,561 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 00:34:58,561 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 00:34:58,562 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 00:34:58,562 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 00:34:58,562 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 00:34:58,562 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 00:34:58,562 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 00:34:58,562 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 00:34:58,562 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 00:34:58,562 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 00:34:58,562 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 00:34:58,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 00:34:58,563 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 00:34:58,563 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-24 00:34:58,563 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-24 00:34:58,563 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-24 00:34:58,563 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-24 00:34:58,563 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 00:34:58,563 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-02-24 00:34:58,563 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-02-24 00:34:58,564 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-24 00:34:58,564 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 00:34:58,721 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 00:34:58,743 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 00:34:58,744 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 00:34:58,745 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 00:34:58,745 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 00:34:58,746 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_12.c [2022-02-24 00:34:58,804 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ae744a77/f1ed9f778f76473cbc36f2ab2e30735d/FLAG2817174d3 [2022-02-24 00:34:59,197 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 00:34:59,198 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_12.c [2022-02-24 00:34:59,208 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ae744a77/f1ed9f778f76473cbc36f2ab2e30735d/FLAG2817174d3 [2022-02-24 00:34:59,222 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ae744a77/f1ed9f778f76473cbc36f2ab2e30735d [2022-02-24 00:34:59,224 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 00:34:59,226 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-24 00:34:59,228 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 00:34:59,228 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 00:34:59,231 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 00:34:59,231 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:34:59" (1/1) ... [2022-02-24 00:34:59,232 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4dd8ef7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:34:59, skipping insertion in model container [2022-02-24 00:34:59,232 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:34:59" (1/1) ... [2022-02-24 00:34:59,237 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 00:34:59,258 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 00:34:59,423 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_12.c[4591,4604] [2022-02-24 00:34:59,425 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 00:34:59,430 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 00:34:59,445 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_12.c[4591,4604] [2022-02-24 00:34:59,446 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 00:34:59,454 INFO L208 MainTranslator]: Completed translation [2022-02-24 00:34:59,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:34:59 WrapperNode [2022-02-24 00:34:59,455 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 00:34:59,456 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 00:34:59,456 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 00:34:59,456 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 00:34:59,463 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:34:59" (1/1) ... [2022-02-24 00:34:59,463 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:34:59" (1/1) ... [2022-02-24 00:34:59,467 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:34:59" (1/1) ... [2022-02-24 00:34:59,467 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:34:59" (1/1) ... [2022-02-24 00:34:59,471 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:34:59" (1/1) ... [2022-02-24 00:34:59,474 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:34:59" (1/1) ... [2022-02-24 00:34:59,475 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:34:59" (1/1) ... [2022-02-24 00:34:59,477 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 00:34:59,477 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 00:34:59,477 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 00:34:59,478 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 00:34:59,478 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:34:59" (1/1) ... [2022-02-24 00:34:59,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 00:34:59,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 00:34:59,509 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) [2022-02-24 00:34:59,510 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 [2022-02-24 00:34:59,534 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 00:34:59,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 00:34:59,535 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 00:34:59,535 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 00:34:59,535 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-24 00:34:59,535 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 00:34:59,535 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 00:34:59,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 00:34:59,535 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-24 00:34:59,535 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 00:34:59,535 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 00:34:59,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 00:34:59,535 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 00:34:59,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 00:34:59,536 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 00:34:59,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 00:34:59,583 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 00:34:59,584 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 00:34:59,718 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 00:34:59,722 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 00:34:59,723 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-24 00:34:59,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:34:59 BoogieIcfgContainer [2022-02-24 00:34:59,724 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 00:34:59,725 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-24 00:34:59,725 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-24 00:34:59,725 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-24 00:34:59,729 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:34:59" (1/1) ... [2022-02-24 00:34:59,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 24.02 12:34:59 BasicIcfg [2022-02-24 00:34:59,762 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-24 00:34:59,764 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 00:34:59,764 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 00:34:59,766 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 00:34:59,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 12:34:59" (1/4) ... [2022-02-24 00:34:59,766 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@499cde9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:34:59, skipping insertion in model container [2022-02-24 00:34:59,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:34:59" (2/4) ... [2022-02-24 00:34:59,766 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@499cde9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:34:59, skipping insertion in model container [2022-02-24 00:34:59,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:34:59" (3/4) ... [2022-02-24 00:34:59,767 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@499cde9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 12:34:59, skipping insertion in model container [2022-02-24 00:34:59,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 24.02 12:34:59" (4/4) ... [2022-02-24 00:34:59,767 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_12.cqvasr [2022-02-24 00:34:59,771 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-24 00:34:59,771 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 00:34:59,826 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 00:34:59,830 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-02-24 00:34:59,831 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 00:34:59,842 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 46 states have internal predecessors, (85), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 00:34:59,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-24 00:34:59,845 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:34:59,845 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:34:59,846 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:34:59,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:34:59,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1823990193, now seen corresponding path program 1 times [2022-02-24 00:34:59,855 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:34:59,855 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683636788] [2022-02-24 00:34:59,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:34:59,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:34:59,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:00,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 00:35:00,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:00,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 00:35:00,090 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:35:00,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683636788] [2022-02-24 00:35:00,092 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683636788] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 00:35:00,092 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 00:35:00,092 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 00:35:00,093 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095428861] [2022-02-24 00:35:00,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 00:35:00,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 00:35:00,098 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:35:00,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 00:35:00,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 00:35:00,123 INFO L87 Difference]: Start difference. First operand has 51 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 46 states have internal predecessors, (85), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:00,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:35:00,304 INFO L93 Difference]: Finished difference Result 100 states and 175 transitions. [2022-02-24 00:35:00,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 00:35:00,307 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-02-24 00:35:00,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:35:00,317 INFO L225 Difference]: With dead ends: 100 [2022-02-24 00:35:00,317 INFO L226 Difference]: Without dead ends: 85 [2022-02-24 00:35:00,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 00:35:00,323 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 208 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 00:35:00,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 101 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 00:35:00,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-02-24 00:35:00,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 59. [2022-02-24 00:35:00,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 55 states have (on average 1.8727272727272728) internal successors, (103), 55 states have internal predecessors, (103), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:00,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 106 transitions. [2022-02-24 00:35:00,361 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 106 transitions. Word has length 23 [2022-02-24 00:35:00,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:35:00,362 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 106 transitions. [2022-02-24 00:35:00,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:00,363 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 106 transitions. [2022-02-24 00:35:00,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-24 00:35:00,363 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:35:00,364 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:35:00,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 00:35:00,364 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:35:00,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:35:00,367 INFO L85 PathProgramCache]: Analyzing trace with hash -316438384, now seen corresponding path program 1 times [2022-02-24 00:35:00,367 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:35:00,368 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782178693] [2022-02-24 00:35:00,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:35:00,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:35:00,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:00,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 00:35:00,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:00,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 00:35:00,430 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:35:00,430 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782178693] [2022-02-24 00:35:00,430 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782178693] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 00:35:00,430 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 00:35:00,431 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 00:35:00,431 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647889531] [2022-02-24 00:35:00,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 00:35:00,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 00:35:00,432 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:35:00,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 00:35:00,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 00:35:00,434 INFO L87 Difference]: Start difference. First operand 59 states and 106 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:00,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:35:00,559 INFO L93 Difference]: Finished difference Result 138 states and 253 transitions. [2022-02-24 00:35:00,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 00:35:00,560 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-02-24 00:35:00,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:35:00,563 INFO L225 Difference]: With dead ends: 138 [2022-02-24 00:35:00,563 INFO L226 Difference]: Without dead ends: 85 [2022-02-24 00:35:00,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 00:35:00,568 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 178 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 00:35:00,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 111 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 00:35:00,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-02-24 00:35:00,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2022-02-24 00:35:00,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 79 states have (on average 1.860759493670886) internal successors, (147), 79 states have internal predecessors, (147), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:00,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 150 transitions. [2022-02-24 00:35:00,575 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 150 transitions. Word has length 23 [2022-02-24 00:35:00,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:35:00,578 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 150 transitions. [2022-02-24 00:35:00,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:00,579 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 150 transitions. [2022-02-24 00:35:00,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-24 00:35:00,584 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:35:00,584 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:35:00,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-24 00:35:00,585 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:35:00,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:35:00,585 INFO L85 PathProgramCache]: Analyzing trace with hash -709089080, now seen corresponding path program 1 times [2022-02-24 00:35:00,585 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:35:00,585 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434543712] [2022-02-24 00:35:00,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:35:00,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:35:00,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:00,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 00:35:00,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:00,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 00:35:00,658 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:35:00,658 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434543712] [2022-02-24 00:35:00,659 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434543712] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 00:35:00,659 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 00:35:00,659 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 00:35:00,659 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248243528] [2022-02-24 00:35:00,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 00:35:00,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 00:35:00,660 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:35:00,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 00:35:00,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 00:35:00,660 INFO L87 Difference]: Start difference. First operand 83 states and 150 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:00,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:35:00,744 INFO L93 Difference]: Finished difference Result 127 states and 226 transitions. [2022-02-24 00:35:00,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 00:35:00,745 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-02-24 00:35:00,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:35:00,748 INFO L225 Difference]: With dead ends: 127 [2022-02-24 00:35:00,748 INFO L226 Difference]: Without dead ends: 88 [2022-02-24 00:35:00,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 00:35:00,754 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 157 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 00:35:00,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 133 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 00:35:00,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-02-24 00:35:00,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2022-02-24 00:35:00,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 82 states have (on average 1.8170731707317074) internal successors, (149), 82 states have internal predecessors, (149), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:00,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 152 transitions. [2022-02-24 00:35:00,768 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 152 transitions. Word has length 24 [2022-02-24 00:35:00,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:35:00,769 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 152 transitions. [2022-02-24 00:35:00,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:00,769 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 152 transitions. [2022-02-24 00:35:00,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-24 00:35:00,769 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:35:00,769 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:35:00,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-24 00:35:00,770 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:35:00,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:35:00,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1219623257, now seen corresponding path program 1 times [2022-02-24 00:35:00,770 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:35:00,770 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344589220] [2022-02-24 00:35:00,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:35:00,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:35:00,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:00,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 00:35:00,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:00,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 00:35:00,831 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:35:00,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344589220] [2022-02-24 00:35:00,831 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344589220] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 00:35:00,831 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 00:35:00,831 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 00:35:00,832 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631688099] [2022-02-24 00:35:00,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 00:35:00,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 00:35:00,832 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:35:00,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 00:35:00,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 00:35:00,833 INFO L87 Difference]: Start difference. First operand 86 states and 152 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:00,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:35:00,923 INFO L93 Difference]: Finished difference Result 161 states and 289 transitions. [2022-02-24 00:35:00,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 00:35:00,924 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-02-24 00:35:00,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:35:00,925 INFO L225 Difference]: With dead ends: 161 [2022-02-24 00:35:00,925 INFO L226 Difference]: Without dead ends: 159 [2022-02-24 00:35:00,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 00:35:00,931 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 195 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 00:35:00,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 89 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 00:35:00,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-02-24 00:35:00,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 113. [2022-02-24 00:35:00,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 109 states have (on average 1.81651376146789) internal successors, (198), 109 states have internal predecessors, (198), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:00,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 201 transitions. [2022-02-24 00:35:00,941 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 201 transitions. Word has length 24 [2022-02-24 00:35:00,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:35:00,942 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 201 transitions. [2022-02-24 00:35:00,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:00,942 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 201 transitions. [2022-02-24 00:35:00,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-24 00:35:00,943 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:35:00,943 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:35:00,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-24 00:35:00,943 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:35:00,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:35:00,943 INFO L85 PathProgramCache]: Analyzing trace with hash 287928552, now seen corresponding path program 1 times [2022-02-24 00:35:00,944 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:35:00,944 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339945136] [2022-02-24 00:35:00,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:35:00,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:35:00,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:00,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 00:35:00,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:01,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 00:35:01,003 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:35:01,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339945136] [2022-02-24 00:35:01,003 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339945136] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 00:35:01,003 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 00:35:01,003 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 00:35:01,004 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178337330] [2022-02-24 00:35:01,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 00:35:01,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 00:35:01,004 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:35:01,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 00:35:01,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 00:35:01,005 INFO L87 Difference]: Start difference. First operand 113 states and 201 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:01,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:35:01,074 INFO L93 Difference]: Finished difference Result 265 states and 479 transitions. [2022-02-24 00:35:01,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 00:35:01,074 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-02-24 00:35:01,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:35:01,077 INFO L225 Difference]: With dead ends: 265 [2022-02-24 00:35:01,080 INFO L226 Difference]: Without dead ends: 161 [2022-02-24 00:35:01,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 00:35:01,082 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 172 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 00:35:01,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 113 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 00:35:01,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-02-24 00:35:01,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 159. [2022-02-24 00:35:01,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 155 states have (on average 1.8064516129032258) internal successors, (280), 155 states have internal predecessors, (280), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:01,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 283 transitions. [2022-02-24 00:35:01,102 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 283 transitions. Word has length 24 [2022-02-24 00:35:01,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:35:01,102 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 283 transitions. [2022-02-24 00:35:01,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:01,102 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 283 transitions. [2022-02-24 00:35:01,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-24 00:35:01,103 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:35:01,103 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:35:01,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-24 00:35:01,103 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:35:01,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:35:01,103 INFO L85 PathProgramCache]: Analyzing trace with hash 846416876, now seen corresponding path program 1 times [2022-02-24 00:35:01,103 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:35:01,104 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147998715] [2022-02-24 00:35:01,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:35:01,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:35:01,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:01,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 00:35:01,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:01,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 00:35:01,140 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:35:01,140 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147998715] [2022-02-24 00:35:01,140 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147998715] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 00:35:01,140 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 00:35:01,140 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 00:35:01,140 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344776722] [2022-02-24 00:35:01,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 00:35:01,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 00:35:01,141 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:35:01,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 00:35:01,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 00:35:01,141 INFO L87 Difference]: Start difference. First operand 159 states and 283 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:01,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:35:01,199 INFO L93 Difference]: Finished difference Result 238 states and 422 transitions. [2022-02-24 00:35:01,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 00:35:01,199 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-02-24 00:35:01,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:35:01,200 INFO L225 Difference]: With dead ends: 238 [2022-02-24 00:35:01,200 INFO L226 Difference]: Without dead ends: 163 [2022-02-24 00:35:01,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 00:35:01,204 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 156 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 00:35:01,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 130 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 00:35:01,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-02-24 00:35:01,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 161. [2022-02-24 00:35:01,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 157 states have (on average 1.78343949044586) internal successors, (280), 157 states have internal predecessors, (280), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:01,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 283 transitions. [2022-02-24 00:35:01,223 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 283 transitions. Word has length 25 [2022-02-24 00:35:01,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:35:01,223 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 283 transitions. [2022-02-24 00:35:01,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:01,223 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 283 transitions. [2022-02-24 00:35:01,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-24 00:35:01,224 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:35:01,224 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:35:01,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-24 00:35:01,224 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:35:01,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:35:01,224 INFO L85 PathProgramCache]: Analyzing trace with hash 335882699, now seen corresponding path program 1 times [2022-02-24 00:35:01,225 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:35:01,225 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835885942] [2022-02-24 00:35:01,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:35:01,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:35:01,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:01,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 00:35:01,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:01,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 00:35:01,278 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:35:01,278 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835885942] [2022-02-24 00:35:01,278 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835885942] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 00:35:01,278 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 00:35:01,279 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 00:35:01,279 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177699757] [2022-02-24 00:35:01,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 00:35:01,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 00:35:01,279 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:35:01,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 00:35:01,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 00:35:01,280 INFO L87 Difference]: Start difference. First operand 161 states and 283 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:01,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:35:01,345 INFO L93 Difference]: Finished difference Result 301 states and 537 transitions. [2022-02-24 00:35:01,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 00:35:01,346 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-02-24 00:35:01,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:35:01,347 INFO L225 Difference]: With dead ends: 301 [2022-02-24 00:35:01,347 INFO L226 Difference]: Without dead ends: 299 [2022-02-24 00:35:01,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 00:35:01,348 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 188 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 00:35:01,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 88 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 00:35:01,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-02-24 00:35:01,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 217. [2022-02-24 00:35:01,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 213 states have (on average 1.7652582159624413) internal successors, (376), 213 states have internal predecessors, (376), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:01,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 379 transitions. [2022-02-24 00:35:01,353 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 379 transitions. Word has length 25 [2022-02-24 00:35:01,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:35:01,353 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 379 transitions. [2022-02-24 00:35:01,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:01,354 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 379 transitions. [2022-02-24 00:35:01,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-24 00:35:01,354 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:35:01,354 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:35:01,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-24 00:35:01,355 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:35:01,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:35:01,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1843434508, now seen corresponding path program 1 times [2022-02-24 00:35:01,355 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:35:01,355 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549658563] [2022-02-24 00:35:01,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:35:01,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:35:01,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:01,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 00:35:01,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:01,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 00:35:01,394 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:35:01,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549658563] [2022-02-24 00:35:01,395 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549658563] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 00:35:01,395 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 00:35:01,395 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 00:35:01,395 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065714683] [2022-02-24 00:35:01,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 00:35:01,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 00:35:01,395 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:35:01,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 00:35:01,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 00:35:01,396 INFO L87 Difference]: Start difference. First operand 217 states and 379 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:01,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:35:01,457 INFO L93 Difference]: Finished difference Result 513 states and 905 transitions. [2022-02-24 00:35:01,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 00:35:01,457 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-02-24 00:35:01,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:35:01,459 INFO L225 Difference]: With dead ends: 513 [2022-02-24 00:35:01,459 INFO L226 Difference]: Without dead ends: 307 [2022-02-24 00:35:01,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 00:35:01,462 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 166 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 00:35:01,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 115 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 00:35:01,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-02-24 00:35:01,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 305. [2022-02-24 00:35:01,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 301 states have (on average 1.7541528239202657) internal successors, (528), 301 states have internal predecessors, (528), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:01,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 531 transitions. [2022-02-24 00:35:01,469 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 531 transitions. Word has length 25 [2022-02-24 00:35:01,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:35:01,469 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 531 transitions. [2022-02-24 00:35:01,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:01,470 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 531 transitions. [2022-02-24 00:35:01,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-24 00:35:01,473 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:35:01,473 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:35:01,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-24 00:35:01,473 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:35:01,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:35:01,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1822461380, now seen corresponding path program 1 times [2022-02-24 00:35:01,474 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:35:01,474 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188170110] [2022-02-24 00:35:01,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:35:01,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:35:01,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:01,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 00:35:01,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:01,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 00:35:01,501 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:35:01,501 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188170110] [2022-02-24 00:35:01,501 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188170110] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 00:35:01,501 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 00:35:01,501 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 00:35:01,501 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899795035] [2022-02-24 00:35:01,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 00:35:01,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 00:35:01,501 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:35:01,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 00:35:01,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 00:35:01,502 INFO L87 Difference]: Start difference. First operand 305 states and 531 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:01,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:35:01,559 INFO L93 Difference]: Finished difference Result 457 states and 793 transitions. [2022-02-24 00:35:01,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 00:35:01,559 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 [2022-02-24 00:35:01,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:35:01,560 INFO L225 Difference]: With dead ends: 457 [2022-02-24 00:35:01,561 INFO L226 Difference]: Without dead ends: 311 [2022-02-24 00:35:01,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 00:35:01,561 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 155 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 00:35:01,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 127 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 00:35:01,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-02-24 00:35:01,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 309. [2022-02-24 00:35:01,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 305 states have (on average 1.7311475409836066) internal successors, (528), 305 states have internal predecessors, (528), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:01,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 531 transitions. [2022-02-24 00:35:01,568 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 531 transitions. Word has length 26 [2022-02-24 00:35:01,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:35:01,569 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 531 transitions. [2022-02-24 00:35:01,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:01,569 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 531 transitions. [2022-02-24 00:35:01,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-24 00:35:01,569 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:35:01,569 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:35:01,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-24 00:35:01,570 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:35:01,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:35:01,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1311927203, now seen corresponding path program 1 times [2022-02-24 00:35:01,570 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:35:01,570 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354107910] [2022-02-24 00:35:01,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:35:01,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:35:01,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:01,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 00:35:01,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:01,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 00:35:01,592 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:35:01,592 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354107910] [2022-02-24 00:35:01,592 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354107910] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 00:35:01,592 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 00:35:01,592 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 00:35:01,593 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946133520] [2022-02-24 00:35:01,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 00:35:01,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 00:35:01,593 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:35:01,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 00:35:01,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 00:35:01,593 INFO L87 Difference]: Start difference. First operand 309 states and 531 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:01,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:35:01,653 INFO L93 Difference]: Finished difference Result 573 states and 1001 transitions. [2022-02-24 00:35:01,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 00:35:01,653 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 [2022-02-24 00:35:01,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:35:01,655 INFO L225 Difference]: With dead ends: 573 [2022-02-24 00:35:01,655 INFO L226 Difference]: Without dead ends: 571 [2022-02-24 00:35:01,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 00:35:01,656 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 181 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 00:35:01,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 87 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 00:35:01,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2022-02-24 00:35:01,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 425. [2022-02-24 00:35:01,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 421 states have (on average 1.700712589073634) internal successors, (716), 421 states have internal predecessors, (716), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:01,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 719 transitions. [2022-02-24 00:35:01,665 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 719 transitions. Word has length 26 [2022-02-24 00:35:01,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:35:01,666 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 719 transitions. [2022-02-24 00:35:01,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:01,666 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 719 transitions. [2022-02-24 00:35:01,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-24 00:35:01,666 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:35:01,667 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:35:01,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-24 00:35:01,667 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:35:01,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:35:01,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1475488284, now seen corresponding path program 1 times [2022-02-24 00:35:01,667 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:35:01,667 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876392466] [2022-02-24 00:35:01,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:35:01,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:35:01,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:01,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 00:35:01,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:01,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 00:35:01,690 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:35:01,690 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876392466] [2022-02-24 00:35:01,690 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876392466] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 00:35:01,690 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 00:35:01,690 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 00:35:01,690 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960875769] [2022-02-24 00:35:01,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 00:35:01,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 00:35:01,691 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:35:01,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 00:35:01,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 00:35:01,691 INFO L87 Difference]: Start difference. First operand 425 states and 719 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:01,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:35:01,751 INFO L93 Difference]: Finished difference Result 1005 states and 1713 transitions. [2022-02-24 00:35:01,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 00:35:01,751 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 [2022-02-24 00:35:01,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:35:01,753 INFO L225 Difference]: With dead ends: 1005 [2022-02-24 00:35:01,753 INFO L226 Difference]: Without dead ends: 595 [2022-02-24 00:35:01,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 00:35:01,754 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 160 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 00:35:01,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 117 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 00:35:01,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2022-02-24 00:35:01,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 593. [2022-02-24 00:35:01,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 589 states have (on average 1.6910016977928692) internal successors, (996), 589 states have internal predecessors, (996), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:01,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 999 transitions. [2022-02-24 00:35:01,781 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 999 transitions. Word has length 26 [2022-02-24 00:35:01,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:35:01,781 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 999 transitions. [2022-02-24 00:35:01,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:01,781 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 999 transitions. [2022-02-24 00:35:01,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-24 00:35:01,782 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:35:01,782 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:35:01,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-24 00:35:01,782 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:35:01,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:35:01,782 INFO L85 PathProgramCache]: Analyzing trace with hash 2015070056, now seen corresponding path program 1 times [2022-02-24 00:35:01,782 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:35:01,782 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619594405] [2022-02-24 00:35:01,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:35:01,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:35:01,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:01,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 00:35:01,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:01,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 00:35:01,807 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:35:01,807 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619594405] [2022-02-24 00:35:01,807 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619594405] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 00:35:01,807 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 00:35:01,807 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 00:35:01,808 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848247833] [2022-02-24 00:35:01,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 00:35:01,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 00:35:01,808 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:35:01,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 00:35:01,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 00:35:01,808 INFO L87 Difference]: Start difference. First operand 593 states and 999 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:01,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:35:01,867 INFO L93 Difference]: Finished difference Result 889 states and 1493 transitions. [2022-02-24 00:35:01,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 00:35:01,867 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 [2022-02-24 00:35:01,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:35:01,869 INFO L225 Difference]: With dead ends: 889 [2022-02-24 00:35:01,869 INFO L226 Difference]: Without dead ends: 603 [2022-02-24 00:35:01,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 00:35:01,870 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 154 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 00:35:01,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 124 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 00:35:01,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2022-02-24 00:35:01,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 601. [2022-02-24 00:35:01,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 597 states have (on average 1.6683417085427135) internal successors, (996), 597 states have internal predecessors, (996), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:01,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 999 transitions. [2022-02-24 00:35:01,883 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 999 transitions. Word has length 27 [2022-02-24 00:35:01,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:35:01,883 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 999 transitions. [2022-02-24 00:35:01,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:01,883 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 999 transitions. [2022-02-24 00:35:01,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-24 00:35:01,884 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:35:01,884 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:35:01,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-24 00:35:01,884 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:35:01,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:35:01,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1504535879, now seen corresponding path program 1 times [2022-02-24 00:35:01,885 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:35:01,885 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40595918] [2022-02-24 00:35:01,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:35:01,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:35:01,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:01,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 00:35:01,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:01,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 00:35:01,909 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:35:01,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40595918] [2022-02-24 00:35:01,909 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40595918] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 00:35:01,909 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 00:35:01,910 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 00:35:01,910 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416019841] [2022-02-24 00:35:01,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 00:35:01,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 00:35:01,910 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:35:01,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 00:35:01,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 00:35:01,911 INFO L87 Difference]: Start difference. First operand 601 states and 999 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:01,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:35:01,978 INFO L93 Difference]: Finished difference Result 1101 states and 1865 transitions. [2022-02-24 00:35:01,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 00:35:01,978 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 [2022-02-24 00:35:01,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:35:01,981 INFO L225 Difference]: With dead ends: 1101 [2022-02-24 00:35:01,981 INFO L226 Difference]: Without dead ends: 1099 [2022-02-24 00:35:01,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 00:35:01,983 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 174 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 00:35:01,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 86 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 00:35:01,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2022-02-24 00:35:01,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 841. [2022-02-24 00:35:01,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 837 states have (on average 1.6296296296296295) internal successors, (1364), 837 states have internal predecessors, (1364), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:02,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1367 transitions. [2022-02-24 00:35:02,000 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1367 transitions. Word has length 27 [2022-02-24 00:35:02,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:35:02,001 INFO L470 AbstractCegarLoop]: Abstraction has 841 states and 1367 transitions. [2022-02-24 00:35:02,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:02,001 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1367 transitions. [2022-02-24 00:35:02,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-24 00:35:02,002 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:35:02,002 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:35:02,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-24 00:35:02,002 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:35:02,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:35:02,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1282879608, now seen corresponding path program 1 times [2022-02-24 00:35:02,002 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:35:02,003 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672742566] [2022-02-24 00:35:02,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:35:02,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:35:02,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:02,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 00:35:02,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:02,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 00:35:02,028 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:35:02,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672742566] [2022-02-24 00:35:02,029 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672742566] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 00:35:02,029 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 00:35:02,029 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 00:35:02,029 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477558644] [2022-02-24 00:35:02,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 00:35:02,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 00:35:02,029 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:35:02,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 00:35:02,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 00:35:02,030 INFO L87 Difference]: Start difference. First operand 841 states and 1367 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:02,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:35:02,095 INFO L93 Difference]: Finished difference Result 1981 states and 3241 transitions. [2022-02-24 00:35:02,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 00:35:02,095 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 [2022-02-24 00:35:02,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:35:02,098 INFO L225 Difference]: With dead ends: 1981 [2022-02-24 00:35:02,098 INFO L226 Difference]: Without dead ends: 1163 [2022-02-24 00:35:02,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 00:35:02,100 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 154 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 00:35:02,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 119 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 00:35:02,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2022-02-24 00:35:02,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 1161. [2022-02-24 00:35:02,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1161 states, 1157 states have (on average 1.6214347450302506) internal successors, (1876), 1157 states have internal predecessors, (1876), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:02,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1161 states to 1161 states and 1879 transitions. [2022-02-24 00:35:02,124 INFO L78 Accepts]: Start accepts. Automaton has 1161 states and 1879 transitions. Word has length 27 [2022-02-24 00:35:02,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:35:02,124 INFO L470 AbstractCegarLoop]: Abstraction has 1161 states and 1879 transitions. [2022-02-24 00:35:02,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:02,124 INFO L276 IsEmpty]: Start isEmpty. Operand 1161 states and 1879 transitions. [2022-02-24 00:35:02,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-24 00:35:02,125 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:35:02,125 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:35:02,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-24 00:35:02,125 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:35:02,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:35:02,125 INFO L85 PathProgramCache]: Analyzing trace with hash -603995456, now seen corresponding path program 1 times [2022-02-24 00:35:02,126 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:35:02,126 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783368661] [2022-02-24 00:35:02,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:35:02,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:35:02,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:02,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 00:35:02,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:02,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 00:35:02,156 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:35:02,156 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783368661] [2022-02-24 00:35:02,156 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783368661] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 00:35:02,156 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 00:35:02,156 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 00:35:02,157 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060728722] [2022-02-24 00:35:02,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 00:35:02,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 00:35:02,157 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:35:02,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 00:35:02,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 00:35:02,157 INFO L87 Difference]: Start difference. First operand 1161 states and 1879 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:02,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:35:02,219 INFO L93 Difference]: Finished difference Result 1741 states and 2809 transitions. [2022-02-24 00:35:02,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 00:35:02,219 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 [2022-02-24 00:35:02,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:35:02,222 INFO L225 Difference]: With dead ends: 1741 [2022-02-24 00:35:02,222 INFO L226 Difference]: Without dead ends: 1179 [2022-02-24 00:35:02,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 00:35:02,225 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 153 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 00:35:02,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 121 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 00:35:02,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2022-02-24 00:35:02,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 1177. [2022-02-24 00:35:02,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1177 states, 1173 states have (on average 1.5993179880647912) internal successors, (1876), 1173 states have internal predecessors, (1876), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:02,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 1879 transitions. [2022-02-24 00:35:02,246 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 1879 transitions. Word has length 28 [2022-02-24 00:35:02,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:35:02,246 INFO L470 AbstractCegarLoop]: Abstraction has 1177 states and 1879 transitions. [2022-02-24 00:35:02,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:02,247 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 1879 transitions. [2022-02-24 00:35:02,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-24 00:35:02,248 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:35:02,248 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:35:02,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-24 00:35:02,248 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:35:02,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:35:02,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1114529633, now seen corresponding path program 1 times [2022-02-24 00:35:02,249 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:35:02,249 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225801755] [2022-02-24 00:35:02,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:35:02,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:35:02,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:02,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 00:35:02,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:02,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 00:35:02,274 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:35:02,274 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225801755] [2022-02-24 00:35:02,274 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225801755] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 00:35:02,275 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 00:35:02,275 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 00:35:02,275 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316871070] [2022-02-24 00:35:02,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 00:35:02,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 00:35:02,275 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:35:02,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 00:35:02,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 00:35:02,276 INFO L87 Difference]: Start difference. First operand 1177 states and 1879 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:02,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:35:02,341 INFO L93 Difference]: Finished difference Result 2125 states and 3465 transitions. [2022-02-24 00:35:02,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 00:35:02,341 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 [2022-02-24 00:35:02,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:35:02,347 INFO L225 Difference]: With dead ends: 2125 [2022-02-24 00:35:02,347 INFO L226 Difference]: Without dead ends: 2123 [2022-02-24 00:35:02,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 00:35:02,349 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 167 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 00:35:02,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 85 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 00:35:02,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2123 states. [2022-02-24 00:35:02,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2123 to 1673. [2022-02-24 00:35:02,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1673 states, 1669 states have (on average 1.555422408627921) internal successors, (2596), 1669 states have internal predecessors, (2596), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:02,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1673 states to 1673 states and 2599 transitions. [2022-02-24 00:35:02,389 INFO L78 Accepts]: Start accepts. Automaton has 1673 states and 2599 transitions. Word has length 28 [2022-02-24 00:35:02,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:35:02,390 INFO L470 AbstractCegarLoop]: Abstraction has 1673 states and 2599 transitions. [2022-02-24 00:35:02,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:02,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1673 states and 2599 transitions. [2022-02-24 00:35:02,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-24 00:35:02,391 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:35:02,391 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:35:02,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-24 00:35:02,392 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:35:02,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:35:02,392 INFO L85 PathProgramCache]: Analyzing trace with hash 393022176, now seen corresponding path program 1 times [2022-02-24 00:35:02,392 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:35:02,392 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382699085] [2022-02-24 00:35:02,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:35:02,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:35:02,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:02,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 00:35:02,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:02,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 00:35:02,415 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:35:02,415 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382699085] [2022-02-24 00:35:02,415 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382699085] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 00:35:02,415 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 00:35:02,415 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 00:35:02,415 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687012903] [2022-02-24 00:35:02,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 00:35:02,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 00:35:02,416 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:35:02,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 00:35:02,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 00:35:02,416 INFO L87 Difference]: Start difference. First operand 1673 states and 2599 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:02,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:35:02,493 INFO L93 Difference]: Finished difference Result 3917 states and 6121 transitions. [2022-02-24 00:35:02,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 00:35:02,493 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 [2022-02-24 00:35:02,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:35:02,499 INFO L225 Difference]: With dead ends: 3917 [2022-02-24 00:35:02,499 INFO L226 Difference]: Without dead ends: 2283 [2022-02-24 00:35:02,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 00:35:02,502 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 148 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 00:35:02,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 121 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 00:35:02,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2283 states. [2022-02-24 00:35:02,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2283 to 2281. [2022-02-24 00:35:02,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2281 states, 2277 states have (on average 1.5476504172156347) internal successors, (3524), 2277 states have internal predecessors, (3524), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:02,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2281 states to 2281 states and 3527 transitions. [2022-02-24 00:35:02,545 INFO L78 Accepts]: Start accepts. Automaton has 2281 states and 3527 transitions. Word has length 28 [2022-02-24 00:35:02,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:35:02,545 INFO L470 AbstractCegarLoop]: Abstraction has 2281 states and 3527 transitions. [2022-02-24 00:35:02,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:02,545 INFO L276 IsEmpty]: Start isEmpty. Operand 2281 states and 3527 transitions. [2022-02-24 00:35:02,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-24 00:35:02,546 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:35:02,547 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:35:02,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-24 00:35:02,547 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:35:02,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:35:02,547 INFO L85 PathProgramCache]: Analyzing trace with hash -190647580, now seen corresponding path program 1 times [2022-02-24 00:35:02,547 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:35:02,547 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963003800] [2022-02-24 00:35:02,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:35:02,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:35:02,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:02,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 00:35:02,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:02,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 00:35:02,568 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:35:02,568 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963003800] [2022-02-24 00:35:02,568 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963003800] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 00:35:02,568 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 00:35:02,568 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 00:35:02,568 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191219287] [2022-02-24 00:35:02,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 00:35:02,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 00:35:02,568 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:35:02,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 00:35:02,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 00:35:02,569 INFO L87 Difference]: Start difference. First operand 2281 states and 3527 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:02,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:35:02,642 INFO L93 Difference]: Finished difference Result 3421 states and 5273 transitions. [2022-02-24 00:35:02,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 00:35:02,643 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 [2022-02-24 00:35:02,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:35:02,649 INFO L225 Difference]: With dead ends: 3421 [2022-02-24 00:35:02,649 INFO L226 Difference]: Without dead ends: 2315 [2022-02-24 00:35:02,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 00:35:02,651 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 152 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 00:35:02,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 118 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 00:35:02,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2315 states. [2022-02-24 00:35:02,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2315 to 2313. [2022-02-24 00:35:02,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2313 states, 2309 states have (on average 1.5262018189692508) internal successors, (3524), 2309 states have internal predecessors, (3524), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:02,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2313 states to 2313 states and 3527 transitions. [2022-02-24 00:35:02,693 INFO L78 Accepts]: Start accepts. Automaton has 2313 states and 3527 transitions. Word has length 29 [2022-02-24 00:35:02,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:35:02,693 INFO L470 AbstractCegarLoop]: Abstraction has 2313 states and 3527 transitions. [2022-02-24 00:35:02,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:02,694 INFO L276 IsEmpty]: Start isEmpty. Operand 2313 states and 3527 transitions. [2022-02-24 00:35:02,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-24 00:35:02,695 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:35:02,695 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:35:02,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-24 00:35:02,695 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:35:02,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:35:02,696 INFO L85 PathProgramCache]: Analyzing trace with hash -701181757, now seen corresponding path program 1 times [2022-02-24 00:35:02,696 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:35:02,696 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315723153] [2022-02-24 00:35:02,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:35:02,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:35:02,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:02,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 00:35:02,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:02,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 00:35:02,715 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:35:02,715 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315723153] [2022-02-24 00:35:02,715 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315723153] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 00:35:02,715 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 00:35:02,715 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 00:35:02,715 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920691794] [2022-02-24 00:35:02,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 00:35:02,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 00:35:02,715 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:35:02,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 00:35:02,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 00:35:02,716 INFO L87 Difference]: Start difference. First operand 2313 states and 3527 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:02,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:35:02,796 INFO L93 Difference]: Finished difference Result 4109 states and 6409 transitions. [2022-02-24 00:35:02,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 00:35:02,797 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 [2022-02-24 00:35:02,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:35:02,830 INFO L225 Difference]: With dead ends: 4109 [2022-02-24 00:35:02,831 INFO L226 Difference]: Without dead ends: 4107 [2022-02-24 00:35:02,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 00:35:02,832 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 160 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 00:35:02,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 84 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 00:35:02,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4107 states. [2022-02-24 00:35:02,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4107 to 3337. [2022-02-24 00:35:02,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3337 states, 3333 states have (on average 1.4797479747974798) internal successors, (4932), 3333 states have internal predecessors, (4932), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:02,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3337 states to 3337 states and 4935 transitions. [2022-02-24 00:35:02,887 INFO L78 Accepts]: Start accepts. Automaton has 3337 states and 4935 transitions. Word has length 29 [2022-02-24 00:35:02,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:35:02,887 INFO L470 AbstractCegarLoop]: Abstraction has 3337 states and 4935 transitions. [2022-02-24 00:35:02,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:02,888 INFO L276 IsEmpty]: Start isEmpty. Operand 3337 states and 4935 transitions. [2022-02-24 00:35:02,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-24 00:35:02,890 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:35:02,891 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:35:02,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-24 00:35:02,891 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:35:02,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:35:02,891 INFO L85 PathProgramCache]: Analyzing trace with hash 806370052, now seen corresponding path program 1 times [2022-02-24 00:35:02,891 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:35:02,891 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201766509] [2022-02-24 00:35:02,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:35:02,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:35:02,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:02,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 00:35:02,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:02,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 00:35:02,913 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:35:02,913 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201766509] [2022-02-24 00:35:02,913 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201766509] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 00:35:02,913 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 00:35:02,913 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 00:35:02,913 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267748647] [2022-02-24 00:35:02,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 00:35:02,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 00:35:02,913 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:35:02,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 00:35:02,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 00:35:02,914 INFO L87 Difference]: Start difference. First operand 3337 states and 4935 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:03,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:35:03,007 INFO L93 Difference]: Finished difference Result 7757 states and 11529 transitions. [2022-02-24 00:35:03,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 00:35:03,007 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 [2022-02-24 00:35:03,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:35:03,018 INFO L225 Difference]: With dead ends: 7757 [2022-02-24 00:35:03,018 INFO L226 Difference]: Without dead ends: 4491 [2022-02-24 00:35:03,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 00:35:03,025 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 142 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 00:35:03,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 123 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 00:35:03,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4491 states. [2022-02-24 00:35:03,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4491 to 4489. [2022-02-24 00:35:03,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4489 states, 4485 states have (on average 1.470680044593088) internal successors, (6596), 4485 states have internal predecessors, (6596), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:03,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4489 states to 4489 states and 6599 transitions. [2022-02-24 00:35:03,104 INFO L78 Accepts]: Start accepts. Automaton has 4489 states and 6599 transitions. Word has length 29 [2022-02-24 00:35:03,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:35:03,104 INFO L470 AbstractCegarLoop]: Abstraction has 4489 states and 6599 transitions. [2022-02-24 00:35:03,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:03,105 INFO L276 IsEmpty]: Start isEmpty. Operand 4489 states and 6599 transitions. [2022-02-24 00:35:03,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-24 00:35:03,109 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:35:03,109 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:35:03,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-24 00:35:03,109 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:35:03,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:35:03,110 INFO L85 PathProgramCache]: Analyzing trace with hash -261765188, now seen corresponding path program 1 times [2022-02-24 00:35:03,110 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:35:03,110 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357684100] [2022-02-24 00:35:03,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:35:03,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:35:03,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:03,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 00:35:03,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:03,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 00:35:03,135 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:35:03,135 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357684100] [2022-02-24 00:35:03,135 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357684100] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 00:35:03,135 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 00:35:03,136 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 00:35:03,136 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016645895] [2022-02-24 00:35:03,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 00:35:03,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 00:35:03,136 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:35:03,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 00:35:03,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 00:35:03,137 INFO L87 Difference]: Start difference. First operand 4489 states and 6599 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:03,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:35:03,248 INFO L93 Difference]: Finished difference Result 6733 states and 9865 transitions. [2022-02-24 00:35:03,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 00:35:03,248 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 [2022-02-24 00:35:03,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:35:03,269 INFO L225 Difference]: With dead ends: 6733 [2022-02-24 00:35:03,269 INFO L226 Difference]: Without dead ends: 4555 [2022-02-24 00:35:03,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 00:35:03,274 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 151 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 00:35:03,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 115 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 00:35:03,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4555 states. [2022-02-24 00:35:03,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4555 to 4553. [2022-02-24 00:35:03,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4553 states, 4549 states have (on average 1.449989008573313) internal successors, (6596), 4549 states have internal predecessors, (6596), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:03,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4553 states to 4553 states and 6599 transitions. [2022-02-24 00:35:03,376 INFO L78 Accepts]: Start accepts. Automaton has 4553 states and 6599 transitions. Word has length 30 [2022-02-24 00:35:03,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:35:03,376 INFO L470 AbstractCegarLoop]: Abstraction has 4553 states and 6599 transitions. [2022-02-24 00:35:03,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:03,376 INFO L276 IsEmpty]: Start isEmpty. Operand 4553 states and 6599 transitions. [2022-02-24 00:35:03,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-24 00:35:03,379 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:35:03,379 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:35:03,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-24 00:35:03,380 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:35:03,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:35:03,380 INFO L85 PathProgramCache]: Analyzing trace with hash -772299365, now seen corresponding path program 1 times [2022-02-24 00:35:03,380 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:35:03,380 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248071207] [2022-02-24 00:35:03,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:35:03,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:35:03,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:03,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 00:35:03,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:03,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 00:35:03,410 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:35:03,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248071207] [2022-02-24 00:35:03,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248071207] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 00:35:03,410 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 00:35:03,410 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 00:35:03,410 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012402716] [2022-02-24 00:35:03,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 00:35:03,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 00:35:03,411 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:35:03,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 00:35:03,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 00:35:03,411 INFO L87 Difference]: Start difference. First operand 4553 states and 6599 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:03,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:35:03,527 INFO L93 Difference]: Finished difference Result 7949 states and 11785 transitions. [2022-02-24 00:35:03,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 00:35:03,528 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 [2022-02-24 00:35:03,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:35:03,541 INFO L225 Difference]: With dead ends: 7949 [2022-02-24 00:35:03,541 INFO L226 Difference]: Without dead ends: 7947 [2022-02-24 00:35:03,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 00:35:03,546 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 153 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 00:35:03,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 83 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 00:35:03,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7947 states. [2022-02-24 00:35:03,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7947 to 6665. [2022-02-24 00:35:03,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6665 states, 6661 states have (on average 1.4033928839513587) internal successors, (9348), 6661 states have internal predecessors, (9348), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:03,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6665 states to 6665 states and 9351 transitions. [2022-02-24 00:35:03,704 INFO L78 Accepts]: Start accepts. Automaton has 6665 states and 9351 transitions. Word has length 30 [2022-02-24 00:35:03,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:35:03,704 INFO L470 AbstractCegarLoop]: Abstraction has 6665 states and 9351 transitions. [2022-02-24 00:35:03,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:03,705 INFO L276 IsEmpty]: Start isEmpty. Operand 6665 states and 9351 transitions. [2022-02-24 00:35:03,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-24 00:35:03,710 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:35:03,710 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:35:03,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-24 00:35:03,711 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:35:03,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:35:03,711 INFO L85 PathProgramCache]: Analyzing trace with hash 735252444, now seen corresponding path program 1 times [2022-02-24 00:35:03,711 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:35:03,711 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121630352] [2022-02-24 00:35:03,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:35:03,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:35:03,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:03,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 00:35:03,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:03,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 00:35:03,731 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:35:03,731 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121630352] [2022-02-24 00:35:03,731 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121630352] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 00:35:03,732 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 00:35:03,732 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 00:35:03,733 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892293725] [2022-02-24 00:35:03,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 00:35:03,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 00:35:03,733 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:35:03,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 00:35:03,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 00:35:03,734 INFO L87 Difference]: Start difference. First operand 6665 states and 9351 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:03,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:35:03,890 INFO L93 Difference]: Finished difference Result 15373 states and 21641 transitions. [2022-02-24 00:35:03,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 00:35:03,891 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 [2022-02-24 00:35:03,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:35:03,904 INFO L225 Difference]: With dead ends: 15373 [2022-02-24 00:35:03,905 INFO L226 Difference]: Without dead ends: 8843 [2022-02-24 00:35:03,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 00:35:03,917 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 136 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 00:35:03,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 125 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 00:35:03,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8843 states. [2022-02-24 00:35:04,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8843 to 8841. [2022-02-24 00:35:04,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8841 states, 8837 states have (on average 1.3909697861265136) internal successors, (12292), 8837 states have internal predecessors, (12292), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:04,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8841 states to 8841 states and 12295 transitions. [2022-02-24 00:35:04,124 INFO L78 Accepts]: Start accepts. Automaton has 8841 states and 12295 transitions. Word has length 30 [2022-02-24 00:35:04,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:35:04,124 INFO L470 AbstractCegarLoop]: Abstraction has 8841 states and 12295 transitions. [2022-02-24 00:35:04,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:04,125 INFO L276 IsEmpty]: Start isEmpty. Operand 8841 states and 12295 transitions. [2022-02-24 00:35:04,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-24 00:35:04,131 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:35:04,131 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:35:04,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-24 00:35:04,131 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:35:04,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:35:04,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1828556384, now seen corresponding path program 1 times [2022-02-24 00:35:04,132 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:35:04,132 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477882549] [2022-02-24 00:35:04,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:35:04,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:35:04,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:04,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 00:35:04,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:04,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 00:35:04,150 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:35:04,150 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477882549] [2022-02-24 00:35:04,150 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477882549] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 00:35:04,150 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 00:35:04,150 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 00:35:04,150 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741843982] [2022-02-24 00:35:04,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 00:35:04,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 00:35:04,151 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:35:04,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 00:35:04,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 00:35:04,151 INFO L87 Difference]: Start difference. First operand 8841 states and 12295 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:04,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:35:04,262 INFO L93 Difference]: Finished difference Result 13261 states and 18377 transitions. [2022-02-24 00:35:04,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 00:35:04,263 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 [2022-02-24 00:35:04,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:35:04,277 INFO L225 Difference]: With dead ends: 13261 [2022-02-24 00:35:04,277 INFO L226 Difference]: Without dead ends: 8971 [2022-02-24 00:35:04,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 00:35:04,288 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 150 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 00:35:04,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 112 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 00:35:04,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8971 states. [2022-02-24 00:35:04,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8971 to 8969. [2022-02-24 00:35:04,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8969 states, 8965 states have (on average 1.3711098717233687) internal successors, (12292), 8965 states have internal predecessors, (12292), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:04,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8969 states to 8969 states and 12295 transitions. [2022-02-24 00:35:04,523 INFO L78 Accepts]: Start accepts. Automaton has 8969 states and 12295 transitions. Word has length 31 [2022-02-24 00:35:04,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:35:04,523 INFO L470 AbstractCegarLoop]: Abstraction has 8969 states and 12295 transitions. [2022-02-24 00:35:04,524 INFO L471 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) [2022-02-24 00:35:04,524 INFO L276 IsEmpty]: Start isEmpty. Operand 8969 states and 12295 transitions. [2022-02-24 00:35:04,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-24 00:35:04,530 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:35:04,530 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:35:04,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-24 00:35:04,530 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:35:04,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:35:04,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1318022207, now seen corresponding path program 1 times [2022-02-24 00:35:04,531 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:35:04,531 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745718734] [2022-02-24 00:35:04,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:35:04,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:35:04,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:04,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 00:35:04,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:04,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 00:35:04,550 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:35:04,550 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745718734] [2022-02-24 00:35:04,550 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745718734] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 00:35:04,550 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 00:35:04,550 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 00:35:04,551 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970686242] [2022-02-24 00:35:04,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 00:35:04,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 00:35:04,551 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:35:04,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 00:35:04,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 00:35:04,551 INFO L87 Difference]: Start difference. First operand 8969 states and 12295 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:04,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:35:04,696 INFO L93 Difference]: Finished difference Result 15373 states and 21513 transitions. [2022-02-24 00:35:04,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 00:35:04,696 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 [2022-02-24 00:35:04,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:35:04,721 INFO L225 Difference]: With dead ends: 15373 [2022-02-24 00:35:04,721 INFO L226 Difference]: Without dead ends: 15371 [2022-02-24 00:35:04,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 00:35:04,729 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 146 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 00:35:04,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 82 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 00:35:04,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15371 states. [2022-02-24 00:35:04,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15371 to 13321. [2022-02-24 00:35:04,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13321 states, 13317 states have (on average 1.326725238417061) internal successors, (17668), 13317 states have internal predecessors, (17668), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:05,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13321 states to 13321 states and 17671 transitions. [2022-02-24 00:35:05,011 INFO L78 Accepts]: Start accepts. Automaton has 13321 states and 17671 transitions. Word has length 31 [2022-02-24 00:35:05,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:35:05,011 INFO L470 AbstractCegarLoop]: Abstraction has 13321 states and 17671 transitions. [2022-02-24 00:35:05,011 INFO L471 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) [2022-02-24 00:35:05,012 INFO L276 IsEmpty]: Start isEmpty. Operand 13321 states and 17671 transitions. [2022-02-24 00:35:05,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-24 00:35:05,024 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:35:05,024 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:35:05,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-24 00:35:05,024 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:35:05,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:35:05,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1469393280, now seen corresponding path program 1 times [2022-02-24 00:35:05,025 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:35:05,025 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536549213] [2022-02-24 00:35:05,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:35:05,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:35:05,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:05,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 00:35:05,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:05,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 00:35:05,046 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:35:05,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536549213] [2022-02-24 00:35:05,046 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536549213] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 00:35:05,046 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 00:35:05,046 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 00:35:05,046 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012231957] [2022-02-24 00:35:05,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 00:35:05,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 00:35:05,047 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:35:05,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 00:35:05,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 00:35:05,048 INFO L87 Difference]: Start difference. First operand 13321 states and 17671 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:05,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:35:05,264 INFO L93 Difference]: Finished difference Result 30477 states and 40457 transitions. [2022-02-24 00:35:05,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 00:35:05,265 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 [2022-02-24 00:35:05,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:35:05,290 INFO L225 Difference]: With dead ends: 30477 [2022-02-24 00:35:05,291 INFO L226 Difference]: Without dead ends: 17419 [2022-02-24 00:35:05,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 00:35:05,316 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 130 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 00:35:05,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 127 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 00:35:05,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17419 states. [2022-02-24 00:35:05,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17419 to 17417. [2022-02-24 00:35:05,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17417 states, 17413 states have (on average 1.3086774249124218) internal successors, (22788), 17413 states have internal predecessors, (22788), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:05,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17417 states to 17417 states and 22791 transitions. [2022-02-24 00:35:05,690 INFO L78 Accepts]: Start accepts. Automaton has 17417 states and 22791 transitions. Word has length 31 [2022-02-24 00:35:05,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:35:05,691 INFO L470 AbstractCegarLoop]: Abstraction has 17417 states and 22791 transitions. [2022-02-24 00:35:05,691 INFO L471 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) [2022-02-24 00:35:05,691 INFO L276 IsEmpty]: Start isEmpty. Operand 17417 states and 22791 transitions. [2022-02-24 00:35:05,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-24 00:35:05,704 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:35:05,704 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:35:05,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-24 00:35:05,704 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:35:05,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:35:05,705 INFO L85 PathProgramCache]: Analyzing trace with hash -2090951496, now seen corresponding path program 1 times [2022-02-24 00:35:05,705 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:35:05,705 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071705812] [2022-02-24 00:35:05,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:35:05,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:35:05,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:05,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 00:35:05,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:05,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 00:35:05,722 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:35:05,722 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071705812] [2022-02-24 00:35:05,722 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071705812] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 00:35:05,722 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 00:35:05,722 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 00:35:05,722 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450832745] [2022-02-24 00:35:05,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 00:35:05,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 00:35:05,723 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:35:05,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 00:35:05,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 00:35:05,723 INFO L87 Difference]: Start difference. First operand 17417 states and 22791 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:05,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:35:05,898 INFO L93 Difference]: Finished difference Result 26125 states and 34057 transitions. [2022-02-24 00:35:05,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 00:35:05,898 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 [2022-02-24 00:35:05,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:35:05,923 INFO L225 Difference]: With dead ends: 26125 [2022-02-24 00:35:05,924 INFO L226 Difference]: Without dead ends: 17675 [2022-02-24 00:35:05,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 00:35:05,938 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 149 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 00:35:05,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 109 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 00:35:05,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17675 states. [2022-02-24 00:35:06,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17675 to 17673. [2022-02-24 00:35:06,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17673 states, 17669 states have (on average 1.2897164525440037) internal successors, (22788), 17669 states have internal predecessors, (22788), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:06,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17673 states to 17673 states and 22791 transitions. [2022-02-24 00:35:06,248 INFO L78 Accepts]: Start accepts. Automaton has 17673 states and 22791 transitions. Word has length 32 [2022-02-24 00:35:06,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:35:06,249 INFO L470 AbstractCegarLoop]: Abstraction has 17673 states and 22791 transitions. [2022-02-24 00:35:06,249 INFO L471 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) [2022-02-24 00:35:06,249 INFO L276 IsEmpty]: Start isEmpty. Operand 17673 states and 22791 transitions. [2022-02-24 00:35:06,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-24 00:35:06,261 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:35:06,261 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:35:06,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-24 00:35:06,261 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:35:06,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:35:06,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1693481623, now seen corresponding path program 1 times [2022-02-24 00:35:06,263 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:35:06,263 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6152047] [2022-02-24 00:35:06,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:35:06,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:35:06,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:06,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 00:35:06,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:06,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 00:35:06,287 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:35:06,287 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6152047] [2022-02-24 00:35:06,287 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6152047] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 00:35:06,287 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 00:35:06,287 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 00:35:06,287 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442870222] [2022-02-24 00:35:06,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 00:35:06,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 00:35:06,288 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:35:06,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 00:35:06,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 00:35:06,288 INFO L87 Difference]: Start difference. First operand 17673 states and 22791 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:06,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:35:06,667 INFO L93 Difference]: Finished difference Result 29709 states and 38921 transitions. [2022-02-24 00:35:06,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 00:35:06,667 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 [2022-02-24 00:35:06,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:35:06,709 INFO L225 Difference]: With dead ends: 29709 [2022-02-24 00:35:06,709 INFO L226 Difference]: Without dead ends: 29707 [2022-02-24 00:35:06,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 00:35:06,715 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 139 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 00:35:06,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 81 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 00:35:06,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29707 states. [2022-02-24 00:35:07,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29707 to 26633. [2022-02-24 00:35:07,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26633 states, 26629 states have (on average 1.249915505651733) internal successors, (33284), 26629 states have internal predecessors, (33284), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:07,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26633 states to 26633 states and 33287 transitions. [2022-02-24 00:35:07,122 INFO L78 Accepts]: Start accepts. Automaton has 26633 states and 33287 transitions. Word has length 32 [2022-02-24 00:35:07,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:35:07,122 INFO L470 AbstractCegarLoop]: Abstraction has 26633 states and 33287 transitions. [2022-02-24 00:35:07,122 INFO L471 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) [2022-02-24 00:35:07,122 INFO L276 IsEmpty]: Start isEmpty. Operand 26633 states and 33287 transitions. [2022-02-24 00:35:07,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-24 00:35:07,150 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:35:07,150 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:35:07,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-24 00:35:07,151 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:35:07,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:35:07,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1093933864, now seen corresponding path program 1 times [2022-02-24 00:35:07,151 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:35:07,151 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230717814] [2022-02-24 00:35:07,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:35:07,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:35:07,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:07,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 00:35:07,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:07,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 00:35:07,168 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:35:07,168 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230717814] [2022-02-24 00:35:07,168 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230717814] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 00:35:07,168 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 00:35:07,169 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 00:35:07,169 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962666571] [2022-02-24 00:35:07,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 00:35:07,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 00:35:07,169 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:35:07,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 00:35:07,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 00:35:07,170 INFO L87 Difference]: Start difference. First operand 26633 states and 33287 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:07,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:35:07,578 INFO L93 Difference]: Finished difference Result 60429 states and 75273 transitions. [2022-02-24 00:35:07,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 00:35:07,579 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 [2022-02-24 00:35:07,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:35:07,622 INFO L225 Difference]: With dead ends: 60429 [2022-02-24 00:35:07,622 INFO L226 Difference]: Without dead ends: 34315 [2022-02-24 00:35:07,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 00:35:07,652 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 124 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 00:35:07,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 129 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 00:35:07,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34315 states. [2022-02-24 00:35:08,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34315 to 34313. [2022-02-24 00:35:08,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34313 states, 34309 states have (on average 1.2238188230493456) internal successors, (41988), 34309 states have internal predecessors, (41988), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:08,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34313 states to 34313 states and 41991 transitions. [2022-02-24 00:35:08,182 INFO L78 Accepts]: Start accepts. Automaton has 34313 states and 41991 transitions. Word has length 32 [2022-02-24 00:35:08,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:35:08,182 INFO L470 AbstractCegarLoop]: Abstraction has 34313 states and 41991 transitions. [2022-02-24 00:35:08,182 INFO L471 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) [2022-02-24 00:35:08,182 INFO L276 IsEmpty]: Start isEmpty. Operand 34313 states and 41991 transitions. [2022-02-24 00:35:08,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-24 00:35:08,212 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:35:08,212 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:35:08,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-24 00:35:08,212 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:35:08,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:35:08,213 INFO L85 PathProgramCache]: Analyzing trace with hash 958355932, now seen corresponding path program 1 times [2022-02-24 00:35:08,213 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:35:08,213 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069749521] [2022-02-24 00:35:08,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:35:08,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:35:08,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:08,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 00:35:08,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:08,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 00:35:08,232 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:35:08,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069749521] [2022-02-24 00:35:08,232 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069749521] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 00:35:08,232 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 00:35:08,232 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 00:35:08,232 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610957964] [2022-02-24 00:35:08,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 00:35:08,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 00:35:08,233 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:35:08,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 00:35:08,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 00:35:08,233 INFO L87 Difference]: Start difference. First operand 34313 states and 41991 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:08,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:35:08,646 INFO L93 Difference]: Finished difference Result 51469 states and 62729 transitions. [2022-02-24 00:35:08,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 00:35:08,647 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 [2022-02-24 00:35:08,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:35:08,686 INFO L225 Difference]: With dead ends: 51469 [2022-02-24 00:35:08,686 INFO L226 Difference]: Without dead ends: 34827 [2022-02-24 00:35:08,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 00:35:08,707 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 148 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 00:35:08,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 106 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 00:35:08,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34827 states. [2022-02-24 00:35:09,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34827 to 34825. [2022-02-24 00:35:09,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34825 states, 34821 states have (on average 1.2058240716808821) internal successors, (41988), 34821 states have internal predecessors, (41988), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:09,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34825 states to 34825 states and 41991 transitions. [2022-02-24 00:35:09,273 INFO L78 Accepts]: Start accepts. Automaton has 34825 states and 41991 transitions. Word has length 33 [2022-02-24 00:35:09,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:35:09,273 INFO L470 AbstractCegarLoop]: Abstraction has 34825 states and 41991 transitions. [2022-02-24 00:35:09,273 INFO L471 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) [2022-02-24 00:35:09,273 INFO L276 IsEmpty]: Start isEmpty. Operand 34825 states and 41991 transitions. [2022-02-24 00:35:09,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-24 00:35:09,288 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:35:09,288 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:35:09,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-24 00:35:09,288 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:35:09,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:35:09,289 INFO L85 PathProgramCache]: Analyzing trace with hash 447821755, now seen corresponding path program 1 times [2022-02-24 00:35:09,289 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:35:09,289 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641200493] [2022-02-24 00:35:09,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:35:09,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:35:09,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:09,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 00:35:09,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:09,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 00:35:09,306 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:35:09,306 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641200493] [2022-02-24 00:35:09,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641200493] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 00:35:09,306 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 00:35:09,306 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 00:35:09,306 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49534873] [2022-02-24 00:35:09,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 00:35:09,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 00:35:09,306 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:35:09,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 00:35:09,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 00:35:09,307 INFO L87 Difference]: Start difference. First operand 34825 states and 41991 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:09,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:35:09,830 INFO L93 Difference]: Finished difference Result 57357 states and 69641 transitions. [2022-02-24 00:35:09,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 00:35:09,830 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 [2022-02-24 00:35:09,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:35:09,895 INFO L225 Difference]: With dead ends: 57357 [2022-02-24 00:35:09,895 INFO L226 Difference]: Without dead ends: 57355 [2022-02-24 00:35:09,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 00:35:09,906 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 132 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 00:35:09,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 80 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 00:35:09,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57355 states. [2022-02-24 00:35:10,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57355 to 53257. [2022-02-24 00:35:10,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53257 states, 53253 states have (on average 1.1730418943533698) internal successors, (62468), 53253 states have internal predecessors, (62468), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:10,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53257 states to 53257 states and 62471 transitions. [2022-02-24 00:35:10,735 INFO L78 Accepts]: Start accepts. Automaton has 53257 states and 62471 transitions. Word has length 33 [2022-02-24 00:35:10,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:35:10,735 INFO L470 AbstractCegarLoop]: Abstraction has 53257 states and 62471 transitions. [2022-02-24 00:35:10,735 INFO L471 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) [2022-02-24 00:35:10,735 INFO L276 IsEmpty]: Start isEmpty. Operand 53257 states and 62471 transitions. [2022-02-24 00:35:10,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-24 00:35:10,765 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:35:10,765 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:35:10,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-24 00:35:10,765 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:35:10,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:35:10,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1955373564, now seen corresponding path program 1 times [2022-02-24 00:35:10,766 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:35:10,766 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920175756] [2022-02-24 00:35:10,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:35:10,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:35:10,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:10,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 00:35:10,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:10,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 00:35:10,787 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:35:10,787 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920175756] [2022-02-24 00:35:10,787 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920175756] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 00:35:10,787 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 00:35:10,787 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 00:35:10,787 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575773312] [2022-02-24 00:35:10,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 00:35:10,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 00:35:10,787 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:35:10,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 00:35:10,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 00:35:10,788 INFO L87 Difference]: Start difference. First operand 53257 states and 62471 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:11,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:35:11,559 INFO L93 Difference]: Finished difference Result 119821 states and 139273 transitions. [2022-02-24 00:35:11,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 00:35:11,559 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 [2022-02-24 00:35:11,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:35:11,633 INFO L225 Difference]: With dead ends: 119821 [2022-02-24 00:35:11,633 INFO L226 Difference]: Without dead ends: 67595 [2022-02-24 00:35:11,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 00:35:11,668 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 118 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 00:35:11,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 131 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 00:35:11,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67595 states. [2022-02-24 00:35:12,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67595 to 67593. [2022-02-24 00:35:12,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67593 states, 67589 states have (on average 1.1363387533474383) internal successors, (76804), 67589 states have internal predecessors, (76804), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:12,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67593 states to 67593 states and 76807 transitions. [2022-02-24 00:35:12,808 INFO L78 Accepts]: Start accepts. Automaton has 67593 states and 76807 transitions. Word has length 33 [2022-02-24 00:35:12,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:35:12,808 INFO L470 AbstractCegarLoop]: Abstraction has 67593 states and 76807 transitions. [2022-02-24 00:35:12,808 INFO L471 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) [2022-02-24 00:35:12,808 INFO L276 IsEmpty]: Start isEmpty. Operand 67593 states and 76807 transitions. [2022-02-24 00:35:12,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-24 00:35:12,843 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:35:12,843 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:35:12,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-24 00:35:12,843 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:35:12,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:35:12,843 INFO L85 PathProgramCache]: Analyzing trace with hash 997605812, now seen corresponding path program 1 times [2022-02-24 00:35:12,843 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:35:12,844 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033288444] [2022-02-24 00:35:12,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:35:12,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:35:12,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:12,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 00:35:12,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:12,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 00:35:12,864 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:35:12,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033288444] [2022-02-24 00:35:12,864 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033288444] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 00:35:12,864 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 00:35:12,864 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 00:35:12,864 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358211501] [2022-02-24 00:35:12,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 00:35:12,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 00:35:12,864 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:35:12,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 00:35:12,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 00:35:12,865 INFO L87 Difference]: Start difference. First operand 67593 states and 76807 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:13,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:35:13,693 INFO L93 Difference]: Finished difference Result 101389 states and 114697 transitions. [2022-02-24 00:35:13,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 00:35:13,694 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 [2022-02-24 00:35:13,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:35:13,766 INFO L225 Difference]: With dead ends: 101389 [2022-02-24 00:35:13,766 INFO L226 Difference]: Without dead ends: 68619 [2022-02-24 00:35:13,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 00:35:13,782 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 147 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 00:35:13,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 103 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 00:35:13,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68619 states. [2022-02-24 00:35:14,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68619 to 68617. [2022-02-24 00:35:14,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68617 states, 68613 states have (on average 1.119379709384519) internal successors, (76804), 68613 states have internal predecessors, (76804), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:14,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68617 states to 68617 states and 76807 transitions. [2022-02-24 00:35:14,868 INFO L78 Accepts]: Start accepts. Automaton has 68617 states and 76807 transitions. Word has length 34 [2022-02-24 00:35:14,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:35:14,868 INFO L470 AbstractCegarLoop]: Abstraction has 68617 states and 76807 transitions. [2022-02-24 00:35:14,868 INFO L471 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) [2022-02-24 00:35:14,868 INFO L276 IsEmpty]: Start isEmpty. Operand 68617 states and 76807 transitions. [2022-02-24 00:35:14,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-24 00:35:14,899 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:35:14,899 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:35:14,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-24 00:35:14,899 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:35:14,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:35:14,900 INFO L85 PathProgramCache]: Analyzing trace with hash 487071635, now seen corresponding path program 1 times [2022-02-24 00:35:14,900 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:35:14,900 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293313230] [2022-02-24 00:35:14,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:35:14,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:35:14,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:14,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 00:35:14,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:14,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 00:35:14,918 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:35:14,918 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293313230] [2022-02-24 00:35:14,918 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293313230] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 00:35:14,918 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 00:35:14,918 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 00:35:14,919 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065900680] [2022-02-24 00:35:14,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 00:35:14,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 00:35:14,919 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:35:14,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 00:35:14,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 00:35:14,919 INFO L87 Difference]: Start difference. First operand 68617 states and 76807 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:16,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:35:16,022 INFO L93 Difference]: Finished difference Result 110603 states and 122888 transitions. [2022-02-24 00:35:16,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 00:35:16,022 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 [2022-02-24 00:35:16,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:35:16,151 INFO L225 Difference]: With dead ends: 110603 [2022-02-24 00:35:16,151 INFO L226 Difference]: Without dead ends: 110601 [2022-02-24 00:35:16,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 00:35:16,173 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 124 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 00:35:16,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 78 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 00:35:16,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110601 states. [2022-02-24 00:35:17,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110601 to 106505. [2022-02-24 00:35:17,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106505 states, 106501 states have (on average 1.0961399423479592) internal successors, (116740), 106501 states have internal predecessors, (116740), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:17,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106505 states to 106505 states and 116743 transitions. [2022-02-24 00:35:17,714 INFO L78 Accepts]: Start accepts. Automaton has 106505 states and 116743 transitions. Word has length 34 [2022-02-24 00:35:17,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:35:17,714 INFO L470 AbstractCegarLoop]: Abstraction has 106505 states and 116743 transitions. [2022-02-24 00:35:17,714 INFO L471 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) [2022-02-24 00:35:17,715 INFO L276 IsEmpty]: Start isEmpty. Operand 106505 states and 116743 transitions. [2022-02-24 00:35:17,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-24 00:35:17,780 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:35:17,781 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:35:17,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-24 00:35:17,781 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:35:17,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:35:17,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1994623444, now seen corresponding path program 1 times [2022-02-24 00:35:17,781 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:35:17,781 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701019862] [2022-02-24 00:35:17,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:35:17,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:35:17,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:17,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 00:35:17,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:35:17,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 00:35:17,806 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:35:17,807 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701019862] [2022-02-24 00:35:17,807 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701019862] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 00:35:17,807 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 00:35:17,807 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 00:35:17,807 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284052801] [2022-02-24 00:35:17,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 00:35:17,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 00:35:17,807 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:35:17,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 00:35:17,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 00:35:17,808 INFO L87 Difference]: Start difference. First operand 106505 states and 116743 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:35:19,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:35:19,380 INFO L93 Difference]: Finished difference Result 237577 states and 256007 transitions. [2022-02-24 00:35:19,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 00:35:19,381 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 [2022-02-24 00:35:19,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:35:19,381 INFO L225 Difference]: With dead ends: 237577 [2022-02-24 00:35:19,381 INFO L226 Difference]: Without dead ends: 0 [2022-02-24 00:35:19,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 00:35:19,475 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 109 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 00:35:19,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 132 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 00:35:19,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-24 00:35:19,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-24 00:35:19,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-24 00:35:19,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-24 00:35:19,476 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 34 [2022-02-24 00:35:19,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:35:19,476 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-24 00:35:19,476 INFO L471 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) [2022-02-24 00:35:19,476 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-24 00:35:19,476 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-24 00:35:19,478 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-24 00:35:19,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-24 00:35:19,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.