/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_13.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 23:19:32,335 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 23:19:32,343 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 23:19:32,373 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-17 23:19:32,393 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 23:19:32,394 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 23:19:32,394 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 23:19:32,395 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 23:19:32,395 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 23:19:32,396 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 23:19:32,397 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 23:19:32,397 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 23:19:32,398 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 23:19:32,401 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 23:19:32,403 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 23:19:32,404 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 23:19:32,406 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 23:19:32,411 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 23:19:32,417 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 23:19:32,418 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 23:19:32,419 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 23:19:32,420 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-17 23:19:32,445 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 23:19:32,446 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 23:19:32,447 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-17 23:19:32,447 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-17 23:19:32,448 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-17 23:19:32,448 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-17 23:19:32,448 INFO L138 SettingsManager]: * Use SBE=true [2022-03-17 23:19:32,448 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 23:19:32,448 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 23:19:32,449 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 23:19:32,449 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 23:19:32,449 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 23:19:32,450 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 23:19:32,450 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 23:19:32,450 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 23:19:32,450 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 23:19:32,450 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 23:19:32,450 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 23:19:32,450 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 23:19:32,450 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 23:19:32,450 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 23:19:32,450 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-17 23:19:32,451 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-17 23:19:32,451 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 23:19:32,451 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-17 23:19:32,451 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-17 23:19:32,451 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-17 23:19:32,451 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-17 23:19:32,452 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 23:19:32,452 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 23:19:32,610 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 23:19:32,624 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 23:19:32,626 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 23:19:32,626 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 23:19:32,629 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 23:19:32,630 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_13.c [2022-03-17 23:19:32,674 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f29f05de/4ac470e7075d44eea3f962ac10d72c1b/FLAGffc378a78 [2022-03-17 23:19:33,069 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 23:19:33,069 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_13.c [2022-03-17 23:19:33,075 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f29f05de/4ac470e7075d44eea3f962ac10d72c1b/FLAGffc378a78 [2022-03-17 23:19:33,083 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f29f05de/4ac470e7075d44eea3f962ac10d72c1b [2022-03-17 23:19:33,085 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 23:19:33,086 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 23:19:33,087 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 23:19:33,088 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 23:19:33,090 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 23:19:33,090 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 11:19:33" (1/1) ... [2022-03-17 23:19:33,091 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b86541d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:19:33, skipping insertion in model container [2022-03-17 23:19:33,091 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 11:19:33" (1/1) ... [2022-03-17 23:19:33,095 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 23:19:33,116 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 23:19:33,282 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_13.c[4936,4949] [2022-03-17 23:19:33,290 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 23:19:33,299 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 23:19:33,329 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_13.c[4936,4949] [2022-03-17 23:19:33,330 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 23:19:33,341 INFO L208 MainTranslator]: Completed translation [2022-03-17 23:19:33,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:19:33 WrapperNode [2022-03-17 23:19:33,343 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 23:19:33,344 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 23:19:33,345 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 23:19:33,345 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 23:19:33,352 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:19:33" (1/1) ... [2022-03-17 23:19:33,352 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:19:33" (1/1) ... [2022-03-17 23:19:33,367 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:19:33" (1/1) ... [2022-03-17 23:19:33,367 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:19:33" (1/1) ... [2022-03-17 23:19:33,378 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:19:33" (1/1) ... [2022-03-17 23:19:33,382 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:19:33" (1/1) ... [2022-03-17 23:19:33,383 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:19:33" (1/1) ... [2022-03-17 23:19:33,385 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 23:19:33,385 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 23:19:33,386 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 23:19:33,386 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 23:19:33,391 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:19:33" (1/1) ... [2022-03-17 23:19:33,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 23:19:33,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 23:19:33,414 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-17 23:19:33,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-17 23:19:33,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 23:19:33,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 23:19:33,444 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 23:19:33,444 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 23:19:33,444 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 23:19:33,445 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 23:19:33,445 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 23:19:33,445 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 23:19:33,446 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-17 23:19:33,446 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 23:19:33,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 23:19:33,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 23:19:33,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 23:19:33,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 23:19:33,446 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 23:19:33,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 23:19:33,506 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 23:19:33,507 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 23:19:33,722 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 23:19:33,728 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 23:19:33,729 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-17 23:19:33,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 11:19:33 BoogieIcfgContainer [2022-03-17 23:19:33,730 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 23:19:33,731 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 23:19:33,731 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 23:19:33,735 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 23:19:33,737 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 11:19:33" (1/1) ... [2022-03-17 23:19:33,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 11:19:33 BasicIcfg [2022-03-17 23:19:33,754 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 23:19:33,755 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 23:19:33,755 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 23:19:33,757 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 23:19:33,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 11:19:33" (1/4) ... [2022-03-17 23:19:33,758 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@251c3f9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 11:19:33, skipping insertion in model container [2022-03-17 23:19:33,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:19:33" (2/4) ... [2022-03-17 23:19:33,758 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@251c3f9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 11:19:33, skipping insertion in model container [2022-03-17 23:19:33,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 11:19:33" (3/4) ... [2022-03-17 23:19:33,758 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@251c3f9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 11:19:33, skipping insertion in model container [2022-03-17 23:19:33,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 11:19:33" (4/4) ... [2022-03-17 23:19:33,759 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_13.cqvasr [2022-03-17 23:19:33,762 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-17 23:19:33,763 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 23:19:33,801 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 23:19:33,805 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-17 23:19:33,806 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 23:19:33,816 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 49 states have internal predecessors, (91), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 23:19:33,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-17 23:19:33,820 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:33,820 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 23:19:33,820 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:33,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:33,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1381361359, now seen corresponding path program 1 times [2022-03-17 23:19:33,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:33,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851265914] [2022-03-17 23:19:33,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:33,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:33,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:33,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:33,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:33,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 23:19:33,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:33,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851265914] [2022-03-17 23:19:33,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851265914] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:33,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:33,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:33,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346467473] [2022-03-17 23:19:33,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:33,998 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:33,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:34,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:34,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:34,026 INFO L87 Difference]: Start difference. First operand has 54 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 49 states have internal predecessors, (91), 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 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:34,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:34,158 INFO L93 Difference]: Finished difference Result 106 states and 187 transitions. [2022-03-17 23:19:34,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:34,161 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-03-17 23:19:34,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:34,166 INFO L225 Difference]: With dead ends: 106 [2022-03-17 23:19:34,166 INFO L226 Difference]: Without dead ends: 91 [2022-03-17 23:19:34,168 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 23:19:34,171 INFO L912 BasicCegarLoop]: 98 mSDtfsCounter, 225 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:19:34,171 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 107 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:19:34,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-17 23:19:34,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63. [2022-03-17 23:19:34,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 59 states have (on average 1.88135593220339) internal successors, (111), 59 states have internal predecessors, (111), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:34,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 114 transitions. [2022-03-17 23:19:34,223 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 114 transitions. Word has length 24 [2022-03-17 23:19:34,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:34,224 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 114 transitions. [2022-03-17 23:19:34,225 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:34,225 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 114 transitions. [2022-03-17 23:19:34,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-17 23:19:34,226 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:34,226 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 23:19:34,227 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 23:19:34,227 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:34,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:34,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1891895536, now seen corresponding path program 1 times [2022-03-17 23:19:34,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:34,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747911560] [2022-03-17 23:19:34,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:34,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:34,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:34,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:34,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:34,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 23:19:34,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:34,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747911560] [2022-03-17 23:19:34,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747911560] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:34,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:34,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:34,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632676424] [2022-03-17 23:19:34,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:34,310 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:34,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:34,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:34,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:34,311 INFO L87 Difference]: Start difference. First operand 63 states and 114 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:34,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:34,424 INFO L93 Difference]: Finished difference Result 148 states and 273 transitions. [2022-03-17 23:19:34,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:34,424 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-03-17 23:19:34,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:34,425 INFO L225 Difference]: With dead ends: 148 [2022-03-17 23:19:34,425 INFO L226 Difference]: Without dead ends: 91 [2022-03-17 23:19:34,426 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 23:19:34,427 INFO L912 BasicCegarLoop]: 112 mSDtfsCounter, 193 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:19:34,427 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 119 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:19:34,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-17 23:19:34,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2022-03-17 23:19:34,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 85 states have (on average 1.8705882352941177) internal successors, (159), 85 states have internal predecessors, (159), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:34,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 162 transitions. [2022-03-17 23:19:34,434 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 162 transitions. Word has length 24 [2022-03-17 23:19:34,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:34,435 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 162 transitions. [2022-03-17 23:19:34,435 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:34,435 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 162 transitions. [2022-03-17 23:19:34,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-17 23:19:34,436 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:34,436 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 23:19:34,436 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-17 23:19:34,436 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:34,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:34,437 INFO L85 PathProgramCache]: Analyzing trace with hash 127502905, now seen corresponding path program 1 times [2022-03-17 23:19:34,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:34,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413850373] [2022-03-17 23:19:34,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:34,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:34,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:34,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:34,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:34,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 23:19:34,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:34,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413850373] [2022-03-17 23:19:34,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413850373] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:34,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:34,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:34,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713764987] [2022-03-17 23:19:34,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:34,483 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:34,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:34,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:34,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:34,484 INFO L87 Difference]: Start difference. First operand 89 states and 162 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:34,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:34,592 INFO L93 Difference]: Finished difference Result 136 states and 244 transitions. [2022-03-17 23:19:34,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:34,593 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-03-17 23:19:34,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:34,596 INFO L225 Difference]: With dead ends: 136 [2022-03-17 23:19:34,596 INFO L226 Difference]: Without dead ends: 94 [2022-03-17 23:19:34,597 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 23:19:34,599 INFO L912 BasicCegarLoop]: 136 mSDtfsCounter, 170 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:19:34,599 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 143 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:19:34,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-03-17 23:19:34,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2022-03-17 23:19:34,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 88 states have (on average 1.8295454545454546) internal successors, (161), 88 states have internal predecessors, (161), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:34,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 164 transitions. [2022-03-17 23:19:34,611 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 164 transitions. Word has length 25 [2022-03-17 23:19:34,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:34,612 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 164 transitions. [2022-03-17 23:19:34,612 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:34,612 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 164 transitions. [2022-03-17 23:19:34,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-17 23:19:34,613 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:34,613 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 23:19:34,613 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-17 23:19:34,613 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:34,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:34,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1480812602, now seen corresponding path program 1 times [2022-03-17 23:19:34,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:34,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134302224] [2022-03-17 23:19:34,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:34,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:34,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:34,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:34,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:34,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 23:19:34,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:34,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134302224] [2022-03-17 23:19:34,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134302224] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:34,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:34,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:34,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349055472] [2022-03-17 23:19:34,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:34,654 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:34,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:34,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:34,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:34,655 INFO L87 Difference]: Start difference. First operand 92 states and 164 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:34,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:34,756 INFO L93 Difference]: Finished difference Result 173 states and 313 transitions. [2022-03-17 23:19:34,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:34,757 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-03-17 23:19:34,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:34,759 INFO L225 Difference]: With dead ends: 173 [2022-03-17 23:19:34,759 INFO L226 Difference]: Without dead ends: 171 [2022-03-17 23:19:34,759 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 23:19:34,768 INFO L912 BasicCegarLoop]: 88 mSDtfsCounter, 212 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:19:34,769 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 95 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:19:34,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-03-17 23:19:34,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 121. [2022-03-17 23:19:34,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 117 states have (on average 1.829059829059829) internal successors, (214), 117 states have internal predecessors, (214), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:34,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 217 transitions. [2022-03-17 23:19:34,781 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 217 transitions. Word has length 25 [2022-03-17 23:19:34,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:34,781 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 217 transitions. [2022-03-17 23:19:34,781 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:34,781 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 217 transitions. [2022-03-17 23:19:34,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-17 23:19:34,782 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:34,782 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 23:19:34,782 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-17 23:19:34,782 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:34,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:34,783 INFO L85 PathProgramCache]: Analyzing trace with hash 970278425, now seen corresponding path program 1 times [2022-03-17 23:19:34,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:34,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910982213] [2022-03-17 23:19:34,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:34,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:34,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:34,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:34,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:34,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 23:19:34,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:34,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910982213] [2022-03-17 23:19:34,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910982213] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:34,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:34,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:34,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33419812] [2022-03-17 23:19:34,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:34,840 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:34,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:34,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:34,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:34,841 INFO L87 Difference]: Start difference. First operand 121 states and 217 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:34,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:34,937 INFO L93 Difference]: Finished difference Result 285 states and 519 transitions. [2022-03-17 23:19:34,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:34,938 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-03-17 23:19:34,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:34,940 INFO L225 Difference]: With dead ends: 285 [2022-03-17 23:19:34,942 INFO L226 Difference]: Without dead ends: 173 [2022-03-17 23:19:34,944 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 23:19:34,951 INFO L912 BasicCegarLoop]: 114 mSDtfsCounter, 187 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:19:34,952 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 121 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:19:34,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-03-17 23:19:34,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 171. [2022-03-17 23:19:34,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 167 states have (on average 1.8203592814371257) internal successors, (304), 167 states have internal predecessors, (304), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:34,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 307 transitions. [2022-03-17 23:19:34,959 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 307 transitions. Word has length 25 [2022-03-17 23:19:34,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:34,959 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 307 transitions. [2022-03-17 23:19:34,959 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:34,959 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 307 transitions. [2022-03-17 23:19:34,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-17 23:19:34,960 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:34,960 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 23:19:34,960 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-17 23:19:34,960 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:34,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:34,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1339417396, now seen corresponding path program 1 times [2022-03-17 23:19:34,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:34,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437129275] [2022-03-17 23:19:34,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:34,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:34,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:34,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:34,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:35,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 23:19:35,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:35,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437129275] [2022-03-17 23:19:35,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437129275] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:35,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:35,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:35,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754513491] [2022-03-17 23:19:35,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:35,006 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:35,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:35,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:35,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:35,007 INFO L87 Difference]: Start difference. First operand 171 states and 307 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:35,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:35,075 INFO L93 Difference]: Finished difference Result 256 states and 458 transitions. [2022-03-17 23:19:35,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:35,076 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-03-17 23:19:35,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:35,077 INFO L225 Difference]: With dead ends: 256 [2022-03-17 23:19:35,077 INFO L226 Difference]: Without dead ends: 175 [2022-03-17 23:19:35,077 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 23:19:35,078 INFO L912 BasicCegarLoop]: 133 mSDtfsCounter, 169 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:19:35,078 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 140 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:19:35,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-03-17 23:19:35,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 173. [2022-03-17 23:19:35,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 169 states have (on average 1.7988165680473374) internal successors, (304), 169 states have internal predecessors, (304), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:35,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 307 transitions. [2022-03-17 23:19:35,088 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 307 transitions. Word has length 26 [2022-03-17 23:19:35,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:35,088 INFO L478 AbstractCegarLoop]: Abstraction has 173 states and 307 transitions. [2022-03-17 23:19:35,088 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:35,089 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 307 transitions. [2022-03-17 23:19:35,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-17 23:19:35,089 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:35,089 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 23:19:35,089 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-17 23:19:35,089 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:35,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:35,090 INFO L85 PathProgramCache]: Analyzing trace with hash 13892301, now seen corresponding path program 1 times [2022-03-17 23:19:35,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:35,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049501577] [2022-03-17 23:19:35,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:35,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:35,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:35,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:35,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:35,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 23:19:35,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:35,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049501577] [2022-03-17 23:19:35,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049501577] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:35,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:35,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:35,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296727411] [2022-03-17 23:19:35,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:35,123 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:35,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:35,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:35,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:35,123 INFO L87 Difference]: Start difference. First operand 173 states and 307 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:35,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:35,198 INFO L93 Difference]: Finished difference Result 493 states and 885 transitions. [2022-03-17 23:19:35,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:35,198 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-03-17 23:19:35,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:35,200 INFO L225 Difference]: With dead ends: 493 [2022-03-17 23:19:35,200 INFO L226 Difference]: Without dead ends: 331 [2022-03-17 23:19:35,201 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 23:19:35,202 INFO L912 BasicCegarLoop]: 91 mSDtfsCounter, 209 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:19:35,203 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 98 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:19:35,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-03-17 23:19:35,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 329. [2022-03-17 23:19:35,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 325 states have (on average 1.7846153846153847) internal successors, (580), 325 states have internal predecessors, (580), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:35,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 583 transitions. [2022-03-17 23:19:35,217 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 583 transitions. Word has length 26 [2022-03-17 23:19:35,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:35,218 INFO L478 AbstractCegarLoop]: Abstraction has 329 states and 583 transitions. [2022-03-17 23:19:35,218 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:35,218 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 583 transitions. [2022-03-17 23:19:35,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-17 23:19:35,223 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:35,223 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 23:19:35,223 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-17 23:19:35,223 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:35,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:35,223 INFO L85 PathProgramCache]: Analyzing trace with hash 524426478, now seen corresponding path program 1 times [2022-03-17 23:19:35,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:35,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905876818] [2022-03-17 23:19:35,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:35,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:35,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:35,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:35,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:35,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 23:19:35,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:35,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905876818] [2022-03-17 23:19:35,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905876818] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:35,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:35,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:35,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810969956] [2022-03-17 23:19:35,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:35,282 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:35,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:35,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:35,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:35,283 INFO L87 Difference]: Start difference. First operand 329 states and 583 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:35,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:35,346 INFO L93 Difference]: Finished difference Result 421 states and 753 transitions. [2022-03-17 23:19:35,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:35,346 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-03-17 23:19:35,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:35,348 INFO L225 Difference]: With dead ends: 421 [2022-03-17 23:19:35,348 INFO L226 Difference]: Without dead ends: 419 [2022-03-17 23:19:35,348 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 23:19:35,348 INFO L912 BasicCegarLoop]: 153 mSDtfsCounter, 135 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:19:35,349 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 160 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:19:35,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-03-17 23:19:35,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 329. [2022-03-17 23:19:35,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 325 states have (on average 1.7723076923076924) internal successors, (576), 325 states have internal predecessors, (576), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:35,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 579 transitions. [2022-03-17 23:19:35,356 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 579 transitions. Word has length 26 [2022-03-17 23:19:35,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:35,356 INFO L478 AbstractCegarLoop]: Abstraction has 329 states and 579 transitions. [2022-03-17 23:19:35,356 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:35,356 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 579 transitions. [2022-03-17 23:19:35,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-17 23:19:35,357 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:35,357 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 23:19:35,357 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-17 23:19:35,358 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:35,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:35,358 INFO L85 PathProgramCache]: Analyzing trace with hash 430693653, now seen corresponding path program 1 times [2022-03-17 23:19:35,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:35,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572274292] [2022-03-17 23:19:35,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:35,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:35,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:35,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:35,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:35,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 23:19:35,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:35,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572274292] [2022-03-17 23:19:35,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572274292] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:35,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:35,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:35,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388998597] [2022-03-17 23:19:35,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:35,384 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:35,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:35,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:35,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:35,385 INFO L87 Difference]: Start difference. First operand 329 states and 579 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:35,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:35,447 INFO L93 Difference]: Finished difference Result 617 states and 1101 transitions. [2022-03-17 23:19:35,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:35,447 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-17 23:19:35,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:35,449 INFO L225 Difference]: With dead ends: 617 [2022-03-17 23:19:35,449 INFO L226 Difference]: Without dead ends: 615 [2022-03-17 23:19:35,449 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 23:19:35,450 INFO L912 BasicCegarLoop]: 86 mSDtfsCounter, 198 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 23:19:35,450 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 93 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 23:19:35,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2022-03-17 23:19:35,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 453. [2022-03-17 23:19:35,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 449 states have (on average 1.7461024498886415) internal successors, (784), 449 states have internal predecessors, (784), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:35,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 787 transitions. [2022-03-17 23:19:35,460 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 787 transitions. Word has length 27 [2022-03-17 23:19:35,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:35,461 INFO L478 AbstractCegarLoop]: Abstraction has 453 states and 787 transitions. [2022-03-17 23:19:35,461 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:35,461 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 787 transitions. [2022-03-17 23:19:35,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-17 23:19:35,461 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:35,461 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 23:19:35,462 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-17 23:19:35,462 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:35,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:35,462 INFO L85 PathProgramCache]: Analyzing trace with hash -79840524, now seen corresponding path program 1 times [2022-03-17 23:19:35,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:35,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173454281] [2022-03-17 23:19:35,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:35,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:35,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:35,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:35,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:35,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 23:19:35,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:35,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173454281] [2022-03-17 23:19:35,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173454281] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:35,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:35,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:35,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320738174] [2022-03-17 23:19:35,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:35,487 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:35,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:35,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:35,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:35,488 INFO L87 Difference]: Start difference. First operand 453 states and 787 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:35,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:35,556 INFO L93 Difference]: Finished difference Result 1081 states and 1893 transitions. [2022-03-17 23:19:35,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:35,556 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-17 23:19:35,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:35,558 INFO L225 Difference]: With dead ends: 1081 [2022-03-17 23:19:35,558 INFO L226 Difference]: Without dead ends: 639 [2022-03-17 23:19:35,559 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 23:19:35,559 INFO L912 BasicCegarLoop]: 118 mSDtfsCounter, 175 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:19:35,560 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 125 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:19:35,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-03-17 23:19:35,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 637. [2022-03-17 23:19:35,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 633 states have (on average 1.7377567140600316) internal successors, (1100), 633 states have internal predecessors, (1100), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:35,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1103 transitions. [2022-03-17 23:19:35,572 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1103 transitions. Word has length 27 [2022-03-17 23:19:35,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:35,572 INFO L478 AbstractCegarLoop]: Abstraction has 637 states and 1103 transitions. [2022-03-17 23:19:35,573 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:35,573 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1103 transitions. [2022-03-17 23:19:35,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-17 23:19:35,573 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:35,573 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 23:19:35,573 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-17 23:19:35,574 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:35,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:35,574 INFO L85 PathProgramCache]: Analyzing trace with hash 466633801, now seen corresponding path program 1 times [2022-03-17 23:19:35,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:35,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819143594] [2022-03-17 23:19:35,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:35,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:35,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:35,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:35,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:35,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 23:19:35,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:35,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819143594] [2022-03-17 23:19:35,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819143594] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:35,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:35,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:35,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666396680] [2022-03-17 23:19:35,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:35,600 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:35,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:35,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:35,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:35,600 INFO L87 Difference]: Start difference. First operand 637 states and 1103 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:35,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:35,664 INFO L93 Difference]: Finished difference Result 961 states and 1661 transitions. [2022-03-17 23:19:35,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:35,665 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-03-17 23:19:35,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:35,667 INFO L225 Difference]: With dead ends: 961 [2022-03-17 23:19:35,667 INFO L226 Difference]: Without dead ends: 651 [2022-03-17 23:19:35,668 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 23:19:35,668 INFO L912 BasicCegarLoop]: 127 mSDtfsCounter, 167 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 23:19:35,668 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 134 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 23:19:35,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2022-03-17 23:19:35,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 649. [2022-03-17 23:19:35,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 645 states have (on average 1.7178294573643411) internal successors, (1108), 645 states have internal predecessors, (1108), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:35,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 1111 transitions. [2022-03-17 23:19:35,681 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 1111 transitions. Word has length 28 [2022-03-17 23:19:35,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:35,681 INFO L478 AbstractCegarLoop]: Abstraction has 649 states and 1111 transitions. [2022-03-17 23:19:35,681 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:35,681 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 1111 transitions. [2022-03-17 23:19:35,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-17 23:19:35,682 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:35,682 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 23:19:35,682 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-17 23:19:35,682 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:35,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:35,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1819943498, now seen corresponding path program 1 times [2022-03-17 23:19:35,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:35,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158127863] [2022-03-17 23:19:35,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:35,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:35,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:35,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:35,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:35,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 23:19:35,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:35,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158127863] [2022-03-17 23:19:35,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158127863] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:35,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:35,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:35,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316395015] [2022-03-17 23:19:35,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:35,720 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:35,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:35,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:35,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:35,721 INFO L87 Difference]: Start difference. First operand 649 states and 1111 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:35,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:35,786 INFO L93 Difference]: Finished difference Result 1197 states and 2081 transitions. [2022-03-17 23:19:35,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:35,786 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-03-17 23:19:35,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:35,790 INFO L225 Difference]: With dead ends: 1197 [2022-03-17 23:19:35,790 INFO L226 Difference]: Without dead ends: 1195 [2022-03-17 23:19:35,790 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 23:19:35,791 INFO L912 BasicCegarLoop]: 85 mSDtfsCounter, 191 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 23:19:35,791 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 92 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 23:19:35,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2022-03-17 23:19:35,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 905. [2022-03-17 23:19:35,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 901 states have (on average 1.6825749167591566) internal successors, (1516), 901 states have internal predecessors, (1516), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:35,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1519 transitions. [2022-03-17 23:19:35,810 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1519 transitions. Word has length 28 [2022-03-17 23:19:35,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:35,810 INFO L478 AbstractCegarLoop]: Abstraction has 905 states and 1519 transitions. [2022-03-17 23:19:35,810 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:35,811 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1519 transitions. [2022-03-17 23:19:35,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-17 23:19:35,811 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:35,812 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 23:19:35,812 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-17 23:19:35,812 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:35,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:35,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1309409321, now seen corresponding path program 1 times [2022-03-17 23:19:35,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:35,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36195631] [2022-03-17 23:19:35,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:35,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:35,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:35,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:35,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:35,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 23:19:35,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:35,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36195631] [2022-03-17 23:19:35,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36195631] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:35,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:35,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:35,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219359757] [2022-03-17 23:19:35,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:35,836 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:35,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:35,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:35,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:35,836 INFO L87 Difference]: Start difference. First operand 905 states and 1519 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:35,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:35,905 INFO L93 Difference]: Finished difference Result 2141 states and 3617 transitions. [2022-03-17 23:19:35,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:35,905 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-03-17 23:19:35,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:35,909 INFO L225 Difference]: With dead ends: 2141 [2022-03-17 23:19:35,909 INFO L226 Difference]: Without dead ends: 1259 [2022-03-17 23:19:35,911 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 23:19:35,911 INFO L912 BasicCegarLoop]: 120 mSDtfsCounter, 169 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 23:19:35,911 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 127 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 23:19:35,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2022-03-17 23:19:35,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 1257. [2022-03-17 23:19:35,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1257 states, 1253 states have (on average 1.675977653631285) internal successors, (2100), 1253 states have internal predecessors, (2100), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:35,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 2103 transitions. [2022-03-17 23:19:35,937 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 2103 transitions. Word has length 28 [2022-03-17 23:19:35,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:35,937 INFO L478 AbstractCegarLoop]: Abstraction has 1257 states and 2103 transitions. [2022-03-17 23:19:35,937 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:35,937 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 2103 transitions. [2022-03-17 23:19:35,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-17 23:19:35,938 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:35,938 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 23:19:35,939 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-03-17 23:19:35,939 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:35,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:35,939 INFO L85 PathProgramCache]: Analyzing trace with hash 583706160, now seen corresponding path program 1 times [2022-03-17 23:19:35,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:35,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806731288] [2022-03-17 23:19:35,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:35,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:35,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:35,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:35,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:35,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 23:19:35,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:35,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806731288] [2022-03-17 23:19:35,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806731288] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:35,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:35,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:35,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003555125] [2022-03-17 23:19:35,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:35,961 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:35,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:35,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:35,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:35,962 INFO L87 Difference]: Start difference. First operand 1257 states and 2103 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:36,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:36,030 INFO L93 Difference]: Finished difference Result 1885 states and 3145 transitions. [2022-03-17 23:19:36,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:36,030 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-17 23:19:36,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:36,034 INFO L225 Difference]: With dead ends: 1885 [2022-03-17 23:19:36,034 INFO L226 Difference]: Without dead ends: 1275 [2022-03-17 23:19:36,035 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 23:19:36,035 INFO L912 BasicCegarLoop]: 124 mSDtfsCounter, 166 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 23:19:36,036 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 131 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 23:19:36,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2022-03-17 23:19:36,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1273. [2022-03-17 23:19:36,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1273 states, 1269 states have (on average 1.6548463356973995) internal successors, (2100), 1269 states have internal predecessors, (2100), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:36,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1273 states to 1273 states and 2103 transitions. [2022-03-17 23:19:36,062 INFO L78 Accepts]: Start accepts. Automaton has 1273 states and 2103 transitions. Word has length 29 [2022-03-17 23:19:36,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:36,062 INFO L478 AbstractCegarLoop]: Abstraction has 1273 states and 2103 transitions. [2022-03-17 23:19:36,062 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:36,062 INFO L276 IsEmpty]: Start isEmpty. Operand 1273 states and 2103 transitions. [2022-03-17 23:19:36,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-17 23:19:36,064 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:36,064 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 23:19:36,064 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-03-17 23:19:36,064 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:36,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:36,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1937015857, now seen corresponding path program 1 times [2022-03-17 23:19:36,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:36,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120177492] [2022-03-17 23:19:36,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:36,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:36,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:36,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:36,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:36,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 23:19:36,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:36,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120177492] [2022-03-17 23:19:36,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120177492] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:36,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:36,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:36,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423995721] [2022-03-17 23:19:36,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:36,096 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:36,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:36,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:36,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:36,097 INFO L87 Difference]: Start difference. First operand 1273 states and 2103 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:36,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:36,168 INFO L93 Difference]: Finished difference Result 2317 states and 3897 transitions. [2022-03-17 23:19:36,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:36,169 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-17 23:19:36,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:36,175 INFO L225 Difference]: With dead ends: 2317 [2022-03-17 23:19:36,175 INFO L226 Difference]: Without dead ends: 2315 [2022-03-17 23:19:36,177 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 23:19:36,178 INFO L912 BasicCegarLoop]: 84 mSDtfsCounter, 184 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 23:19:36,178 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 91 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 23:19:36,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2315 states. [2022-03-17 23:19:36,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2315 to 1801. [2022-03-17 23:19:36,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1801 states, 1797 states have (on average 1.613800779076238) internal successors, (2900), 1797 states have internal predecessors, (2900), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:36,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1801 states to 1801 states and 2903 transitions. [2022-03-17 23:19:36,217 INFO L78 Accepts]: Start accepts. Automaton has 1801 states and 2903 transitions. Word has length 29 [2022-03-17 23:19:36,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:36,217 INFO L478 AbstractCegarLoop]: Abstraction has 1801 states and 2903 transitions. [2022-03-17 23:19:36,217 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:36,217 INFO L276 IsEmpty]: Start isEmpty. Operand 1801 states and 2903 transitions. [2022-03-17 23:19:36,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-17 23:19:36,218 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:36,218 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 23:19:36,219 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-03-17 23:19:36,219 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:36,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:36,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1426481680, now seen corresponding path program 1 times [2022-03-17 23:19:36,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:36,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735961450] [2022-03-17 23:19:36,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:36,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:36,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:36,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:36,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:36,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 23:19:36,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:36,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735961450] [2022-03-17 23:19:36,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735961450] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:36,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:36,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:36,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700642034] [2022-03-17 23:19:36,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:36,251 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:36,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:36,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:36,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:36,252 INFO L87 Difference]: Start difference. First operand 1801 states and 2903 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:36,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:36,330 INFO L93 Difference]: Finished difference Result 4237 states and 6873 transitions. [2022-03-17 23:19:36,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:36,330 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-17 23:19:36,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:36,349 INFO L225 Difference]: With dead ends: 4237 [2022-03-17 23:19:36,350 INFO L226 Difference]: Without dead ends: 2475 [2022-03-17 23:19:36,351 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 23:19:36,352 INFO L912 BasicCegarLoop]: 122 mSDtfsCounter, 163 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 23:19:36,352 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 129 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 23:19:36,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2475 states. [2022-03-17 23:19:36,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2475 to 2473. [2022-03-17 23:19:36,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2473 states, 2469 states have (on average 1.608748481166464) internal successors, (3972), 2469 states have internal predecessors, (3972), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:36,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2473 states to 2473 states and 3975 transitions. [2022-03-17 23:19:36,399 INFO L78 Accepts]: Start accepts. Automaton has 2473 states and 3975 transitions. Word has length 29 [2022-03-17 23:19:36,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:36,399 INFO L478 AbstractCegarLoop]: Abstraction has 2473 states and 3975 transitions. [2022-03-17 23:19:36,399 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:36,399 INFO L276 IsEmpty]: Start isEmpty. Operand 2473 states and 3975 transitions. [2022-03-17 23:19:36,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-17 23:19:36,401 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:36,401 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 23:19:36,401 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-03-17 23:19:36,401 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:36,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:36,402 INFO L85 PathProgramCache]: Analyzing trace with hash -82017883, now seen corresponding path program 1 times [2022-03-17 23:19:36,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:36,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235195023] [2022-03-17 23:19:36,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:36,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:36,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:36,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:36,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:36,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 23:19:36,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:36,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235195023] [2022-03-17 23:19:36,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235195023] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:36,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:36,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:36,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386036009] [2022-03-17 23:19:36,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:36,444 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:36,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:36,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:36,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:36,445 INFO L87 Difference]: Start difference. First operand 2473 states and 3975 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:36,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:36,524 INFO L93 Difference]: Finished difference Result 3709 states and 5945 transitions. [2022-03-17 23:19:36,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:36,525 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-03-17 23:19:36,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:36,531 INFO L225 Difference]: With dead ends: 3709 [2022-03-17 23:19:36,532 INFO L226 Difference]: Without dead ends: 2507 [2022-03-17 23:19:36,534 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 23:19:36,535 INFO L912 BasicCegarLoop]: 121 mSDtfsCounter, 165 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 23:19:36,535 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 128 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 23:19:36,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2507 states. [2022-03-17 23:19:36,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2507 to 2505. [2022-03-17 23:19:36,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2505 states, 2501 states have (on average 1.5881647341063574) internal successors, (3972), 2501 states have internal predecessors, (3972), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:36,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2505 states to 2505 states and 3975 transitions. [2022-03-17 23:19:36,581 INFO L78 Accepts]: Start accepts. Automaton has 2505 states and 3975 transitions. Word has length 30 [2022-03-17 23:19:36,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:36,582 INFO L478 AbstractCegarLoop]: Abstraction has 2505 states and 3975 transitions. [2022-03-17 23:19:36,582 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:36,582 INFO L276 IsEmpty]: Start isEmpty. Operand 2505 states and 3975 transitions. [2022-03-17 23:19:36,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-17 23:19:36,583 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:36,583 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 23:19:36,584 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-03-17 23:19:36,584 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:36,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:36,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1271291814, now seen corresponding path program 1 times [2022-03-17 23:19:36,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:36,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184771303] [2022-03-17 23:19:36,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:36,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:36,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:36,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:36,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:36,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 23:19:36,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:36,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184771303] [2022-03-17 23:19:36,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184771303] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:36,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:36,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:36,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517640606] [2022-03-17 23:19:36,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:36,619 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:36,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:36,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:36,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:36,619 INFO L87 Difference]: Start difference. First operand 2505 states and 3975 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:36,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:36,701 INFO L93 Difference]: Finished difference Result 4493 states and 7273 transitions. [2022-03-17 23:19:36,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:36,701 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-03-17 23:19:36,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:36,713 INFO L225 Difference]: With dead ends: 4493 [2022-03-17 23:19:36,713 INFO L226 Difference]: Without dead ends: 4491 [2022-03-17 23:19:36,715 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 23:19:36,715 INFO L912 BasicCegarLoop]: 83 mSDtfsCounter, 177 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 23:19:36,716 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 90 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 23:19:36,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4491 states. [2022-03-17 23:19:36,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4491 to 3593. [2022-03-17 23:19:36,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3593 states, 3589 states have (on average 1.5436054611312344) internal successors, (5540), 3589 states have internal predecessors, (5540), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:36,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3593 states to 3593 states and 5543 transitions. [2022-03-17 23:19:36,814 INFO L78 Accepts]: Start accepts. Automaton has 3593 states and 5543 transitions. Word has length 30 [2022-03-17 23:19:36,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:36,814 INFO L478 AbstractCegarLoop]: Abstraction has 3593 states and 5543 transitions. [2022-03-17 23:19:36,814 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:36,814 INFO L276 IsEmpty]: Start isEmpty. Operand 3593 states and 5543 transitions. [2022-03-17 23:19:36,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-17 23:19:36,817 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:36,817 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 23:19:36,817 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-03-17 23:19:36,817 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:36,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:36,818 INFO L85 PathProgramCache]: Analyzing trace with hash 760757637, now seen corresponding path program 1 times [2022-03-17 23:19:36,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:36,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446758340] [2022-03-17 23:19:36,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:36,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:36,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:36,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:36,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:36,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 23:19:36,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:36,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446758340] [2022-03-17 23:19:36,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446758340] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:36,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:36,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:36,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124866059] [2022-03-17 23:19:36,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:36,841 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:36,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:36,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:36,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:36,842 INFO L87 Difference]: Start difference. First operand 3593 states and 5543 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:36,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:36,935 INFO L93 Difference]: Finished difference Result 8397 states and 13033 transitions. [2022-03-17 23:19:36,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:36,935 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-03-17 23:19:36,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:36,962 INFO L225 Difference]: With dead ends: 8397 [2022-03-17 23:19:36,962 INFO L226 Difference]: Without dead ends: 4875 [2022-03-17 23:19:36,968 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 23:19:36,968 INFO L912 BasicCegarLoop]: 124 mSDtfsCounter, 157 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 23:19:36,968 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 131 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 23:19:36,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4875 states. [2022-03-17 23:19:37,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4875 to 4873. [2022-03-17 23:19:37,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4873 states, 4869 states have (on average 1.538714315054426) internal successors, (7492), 4869 states have internal predecessors, (7492), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:37,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4873 states to 4873 states and 7495 transitions. [2022-03-17 23:19:37,082 INFO L78 Accepts]: Start accepts. Automaton has 4873 states and 7495 transitions. Word has length 30 [2022-03-17 23:19:37,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:37,082 INFO L478 AbstractCegarLoop]: Abstraction has 4873 states and 7495 transitions. [2022-03-17 23:19:37,083 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:37,083 INFO L276 IsEmpty]: Start isEmpty. Operand 4873 states and 7495 transitions. [2022-03-17 23:19:37,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-17 23:19:37,088 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:37,088 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 23:19:37,088 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-03-17 23:19:37,088 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:37,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:37,088 INFO L85 PathProgramCache]: Analyzing trace with hash 755373388, now seen corresponding path program 1 times [2022-03-17 23:19:37,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:37,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127308784] [2022-03-17 23:19:37,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:37,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:37,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:37,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:37,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:37,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 23:19:37,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:37,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127308784] [2022-03-17 23:19:37,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127308784] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:37,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:37,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:37,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005648780] [2022-03-17 23:19:37,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:37,113 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:37,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:37,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:37,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:37,114 INFO L87 Difference]: Start difference. First operand 4873 states and 7495 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:37,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:37,204 INFO L93 Difference]: Finished difference Result 7309 states and 11209 transitions. [2022-03-17 23:19:37,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:37,204 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-03-17 23:19:37,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:37,213 INFO L225 Difference]: With dead ends: 7309 [2022-03-17 23:19:37,213 INFO L226 Difference]: Without dead ends: 4939 [2022-03-17 23:19:37,218 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 23:19:37,219 INFO L912 BasicCegarLoop]: 118 mSDtfsCounter, 164 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 125 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 [2022-03-17 23:19:37,220 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 125 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 23:19:37,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4939 states. [2022-03-17 23:19:37,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4939 to 4937. [2022-03-17 23:19:37,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4937 states, 4933 states have (on average 1.5187512669774985) internal successors, (7492), 4933 states have internal predecessors, (7492), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:37,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4937 states to 4937 states and 7495 transitions. [2022-03-17 23:19:37,346 INFO L78 Accepts]: Start accepts. Automaton has 4937 states and 7495 transitions. Word has length 31 [2022-03-17 23:19:37,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:37,347 INFO L478 AbstractCegarLoop]: Abstraction has 4937 states and 7495 transitions. [2022-03-17 23:19:37,347 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:37,347 INFO L276 IsEmpty]: Start isEmpty. Operand 4937 states and 7495 transitions. [2022-03-17 23:19:37,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-17 23:19:37,350 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:37,350 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 23:19:37,350 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-03-17 23:19:37,351 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:37,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:37,351 INFO L85 PathProgramCache]: Analyzing trace with hash 2108683085, now seen corresponding path program 1 times [2022-03-17 23:19:37,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:37,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470901348] [2022-03-17 23:19:37,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:37,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:37,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:37,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:37,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:37,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 23:19:37,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:37,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470901348] [2022-03-17 23:19:37,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470901348] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:37,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:37,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:37,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724800774] [2022-03-17 23:19:37,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:37,376 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:37,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:37,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:37,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:37,377 INFO L87 Difference]: Start difference. First operand 4937 states and 7495 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:37,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:37,480 INFO L93 Difference]: Finished difference Result 8717 states and 13513 transitions. [2022-03-17 23:19:37,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:37,481 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-03-17 23:19:37,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:37,494 INFO L225 Difference]: With dead ends: 8717 [2022-03-17 23:19:37,495 INFO L226 Difference]: Without dead ends: 8715 [2022-03-17 23:19:37,499 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 23:19:37,501 INFO L912 BasicCegarLoop]: 82 mSDtfsCounter, 170 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 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, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 23:19:37,501 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 89 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 23:19:37,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8715 states. [2022-03-17 23:19:37,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8715 to 7177. [2022-03-17 23:19:37,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7177 states, 7173 states have (on average 1.4727450160323434) internal successors, (10564), 7173 states have internal predecessors, (10564), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:37,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7177 states to 7177 states and 10567 transitions. [2022-03-17 23:19:37,695 INFO L78 Accepts]: Start accepts. Automaton has 7177 states and 10567 transitions. Word has length 31 [2022-03-17 23:19:37,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:37,695 INFO L478 AbstractCegarLoop]: Abstraction has 7177 states and 10567 transitions. [2022-03-17 23:19:37,696 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:37,696 INFO L276 IsEmpty]: Start isEmpty. Operand 7177 states and 10567 transitions. [2022-03-17 23:19:37,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-17 23:19:37,702 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:37,702 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 23:19:37,702 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-03-17 23:19:37,702 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:37,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:37,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1598148908, now seen corresponding path program 1 times [2022-03-17 23:19:37,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:37,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448133186] [2022-03-17 23:19:37,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:37,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:37,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:37,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:37,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:37,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 23:19:37,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:37,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448133186] [2022-03-17 23:19:37,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448133186] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:37,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:37,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:37,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219286221] [2022-03-17 23:19:37,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:37,736 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:37,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:37,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:37,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:37,736 INFO L87 Difference]: Start difference. First operand 7177 states and 10567 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:37,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:37,863 INFO L93 Difference]: Finished difference Result 16653 states and 24649 transitions. [2022-03-17 23:19:37,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:37,863 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-03-17 23:19:37,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:37,878 INFO L225 Difference]: With dead ends: 16653 [2022-03-17 23:19:37,879 INFO L226 Difference]: Without dead ends: 9611 [2022-03-17 23:19:37,893 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 23:19:37,894 INFO L912 BasicCegarLoop]: 126 mSDtfsCounter, 151 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 23:19:37,894 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 133 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 23:19:37,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9611 states. [2022-03-17 23:19:38,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9611 to 9609. [2022-03-17 23:19:38,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9609 states, 9605 states have (on average 1.4663196251952109) internal successors, (14084), 9605 states have internal predecessors, (14084), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:38,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9609 states to 9609 states and 14087 transitions. [2022-03-17 23:19:38,108 INFO L78 Accepts]: Start accepts. Automaton has 9609 states and 14087 transitions. Word has length 31 [2022-03-17 23:19:38,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:38,108 INFO L478 AbstractCegarLoop]: Abstraction has 9609 states and 14087 transitions. [2022-03-17 23:19:38,108 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:38,108 INFO L276 IsEmpty]: Start isEmpty. Operand 9609 states and 14087 transitions. [2022-03-17 23:19:38,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-17 23:19:38,115 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:38,115 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 23:19:38,115 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-03-17 23:19:38,115 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:38,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:38,115 INFO L85 PathProgramCache]: Analyzing trace with hash 944699137, now seen corresponding path program 1 times [2022-03-17 23:19:38,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:38,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054752436] [2022-03-17 23:19:38,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:38,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:38,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:38,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:38,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:38,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 23:19:38,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:38,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054752436] [2022-03-17 23:19:38,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054752436] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:38,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:38,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:38,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120246004] [2022-03-17 23:19:38,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:38,140 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:38,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:38,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:38,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:38,140 INFO L87 Difference]: Start difference. First operand 9609 states and 14087 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:38,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:38,261 INFO L93 Difference]: Finished difference Result 14413 states and 21065 transitions. [2022-03-17 23:19:38,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:38,262 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-03-17 23:19:38,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:38,276 INFO L225 Difference]: With dead ends: 14413 [2022-03-17 23:19:38,276 INFO L226 Difference]: Without dead ends: 9739 [2022-03-17 23:19:38,286 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 23:19:38,287 INFO L912 BasicCegarLoop]: 115 mSDtfsCounter, 163 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 122 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 [2022-03-17 23:19:38,287 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 122 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 23:19:38,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9739 states. [2022-03-17 23:19:38,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9739 to 9737. [2022-03-17 23:19:38,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9737 states, 9733 states have (on average 1.4470358573923765) internal successors, (14084), 9733 states have internal predecessors, (14084), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:38,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9737 states to 9737 states and 14087 transitions. [2022-03-17 23:19:38,499 INFO L78 Accepts]: Start accepts. Automaton has 9737 states and 14087 transitions. Word has length 32 [2022-03-17 23:19:38,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:38,500 INFO L478 AbstractCegarLoop]: Abstraction has 9737 states and 14087 transitions. [2022-03-17 23:19:38,500 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:38,500 INFO L276 IsEmpty]: Start isEmpty. Operand 9737 states and 14087 transitions. [2022-03-17 23:19:38,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-17 23:19:38,506 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:38,506 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 23:19:38,506 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-03-17 23:19:38,507 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:38,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:38,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1996958462, now seen corresponding path program 1 times [2022-03-17 23:19:38,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:38,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917139864] [2022-03-17 23:19:38,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:38,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:38,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:38,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:38,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:38,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 23:19:38,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:38,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917139864] [2022-03-17 23:19:38,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917139864] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:38,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:38,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:38,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813640551] [2022-03-17 23:19:38,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:38,534 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:38,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:38,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:38,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:38,534 INFO L87 Difference]: Start difference. First operand 9737 states and 14087 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:38,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:38,682 INFO L93 Difference]: Finished difference Result 16909 states and 24969 transitions. [2022-03-17 23:19:38,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:38,683 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-03-17 23:19:38,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:38,709 INFO L225 Difference]: With dead ends: 16909 [2022-03-17 23:19:38,710 INFO L226 Difference]: Without dead ends: 16907 [2022-03-17 23:19:38,716 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 23:19:38,717 INFO L912 BasicCegarLoop]: 81 mSDtfsCounter, 163 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 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, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 23:19:38,718 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 88 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 23:19:38,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16907 states. [2022-03-17 23:19:38,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16907 to 14345. [2022-03-17 23:19:39,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14345 states, 14341 states have (on average 1.4015759012621156) internal successors, (20100), 14341 states have internal predecessors, (20100), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:39,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14345 states to 14345 states and 20103 transitions. [2022-03-17 23:19:39,034 INFO L78 Accepts]: Start accepts. Automaton has 14345 states and 20103 transitions. Word has length 32 [2022-03-17 23:19:39,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:39,034 INFO L478 AbstractCegarLoop]: Abstraction has 14345 states and 20103 transitions. [2022-03-17 23:19:39,034 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:39,035 INFO L276 IsEmpty]: Start isEmpty. Operand 14345 states and 20103 transitions. [2022-03-17 23:19:39,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-17 23:19:39,048 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:39,048 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 23:19:39,048 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-03-17 23:19:39,048 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:39,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:39,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1787474657, now seen corresponding path program 1 times [2022-03-17 23:19:39,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:39,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448702867] [2022-03-17 23:19:39,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:39,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:39,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:39,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:39,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:39,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 23:19:39,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:39,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448702867] [2022-03-17 23:19:39,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448702867] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:39,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:39,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:39,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162116051] [2022-03-17 23:19:39,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:39,069 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:39,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:39,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:39,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:39,069 INFO L87 Difference]: Start difference. First operand 14345 states and 20103 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:39,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:39,284 INFO L93 Difference]: Finished difference Result 33037 states and 46473 transitions. [2022-03-17 23:19:39,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:39,284 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-03-17 23:19:39,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:39,311 INFO L225 Difference]: With dead ends: 33037 [2022-03-17 23:19:39,312 INFO L226 Difference]: Without dead ends: 18955 [2022-03-17 23:19:39,332 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 23:19:39,333 INFO L912 BasicCegarLoop]: 128 mSDtfsCounter, 145 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 135 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 [2022-03-17 23:19:39,336 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 135 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 23:19:39,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18955 states. [2022-03-17 23:19:39,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18955 to 18953. [2022-03-17 23:19:39,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18953 states, 18949 states have (on average 1.3917357116470526) internal successors, (26372), 18949 states have internal predecessors, (26372), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:39,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18953 states to 18953 states and 26375 transitions. [2022-03-17 23:19:39,680 INFO L78 Accepts]: Start accepts. Automaton has 18953 states and 26375 transitions. Word has length 32 [2022-03-17 23:19:39,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:39,680 INFO L478 AbstractCegarLoop]: Abstraction has 18953 states and 26375 transitions. [2022-03-17 23:19:39,680 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:39,681 INFO L276 IsEmpty]: Start isEmpty. Operand 18953 states and 26375 transitions. [2022-03-17 23:19:39,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-17 23:19:39,698 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:39,698 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 23:19:39,698 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-03-17 23:19:39,698 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:39,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:39,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1776137112, now seen corresponding path program 1 times [2022-03-17 23:19:39,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:39,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938875485] [2022-03-17 23:19:39,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:39,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:39,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:39,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:39,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:39,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 23:19:39,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:39,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938875485] [2022-03-17 23:19:39,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938875485] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:39,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:39,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:39,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458920808] [2022-03-17 23:19:39,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:39,726 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:39,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:39,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:39,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:39,727 INFO L87 Difference]: Start difference. First operand 18953 states and 26375 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:39,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:39,964 INFO L93 Difference]: Finished difference Result 28429 states and 39433 transitions. [2022-03-17 23:19:39,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:39,965 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-03-17 23:19:39,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:39,990 INFO L225 Difference]: With dead ends: 28429 [2022-03-17 23:19:39,990 INFO L226 Difference]: Without dead ends: 19211 [2022-03-17 23:19:40,002 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 23:19:40,003 INFO L912 BasicCegarLoop]: 112 mSDtfsCounter, 162 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 119 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 [2022-03-17 23:19:40,003 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 119 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 23:19:40,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19211 states. [2022-03-17 23:19:40,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19211 to 19209. [2022-03-17 23:19:40,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19209 states, 19205 states have (on average 1.37318406664931) internal successors, (26372), 19205 states have internal predecessors, (26372), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:40,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19209 states to 19209 states and 26375 transitions. [2022-03-17 23:19:40,368 INFO L78 Accepts]: Start accepts. Automaton has 19209 states and 26375 transitions. Word has length 33 [2022-03-17 23:19:40,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:40,368 INFO L478 AbstractCegarLoop]: Abstraction has 19209 states and 26375 transitions. [2022-03-17 23:19:40,368 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:40,368 INFO L276 IsEmpty]: Start isEmpty. Operand 19209 states and 26375 transitions. [2022-03-17 23:19:40,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-17 23:19:40,386 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:40,386 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 23:19:40,386 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-03-17 23:19:40,386 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:40,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:40,387 INFO L85 PathProgramCache]: Analyzing trace with hash -422827415, now seen corresponding path program 1 times [2022-03-17 23:19:40,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:40,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307432127] [2022-03-17 23:19:40,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:40,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:40,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:40,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:40,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:40,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 23:19:40,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:40,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307432127] [2022-03-17 23:19:40,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307432127] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:40,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:40,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:40,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283156776] [2022-03-17 23:19:40,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:40,406 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:40,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:40,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:40,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:40,406 INFO L87 Difference]: Start difference. First operand 19209 states and 26375 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:40,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:40,647 INFO L93 Difference]: Finished difference Result 32781 states and 45833 transitions. [2022-03-17 23:19:40,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:40,647 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 [2022-03-17 23:19:40,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:40,688 INFO L225 Difference]: With dead ends: 32781 [2022-03-17 23:19:40,688 INFO L226 Difference]: Without dead ends: 32779 [2022-03-17 23:19:40,700 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 23:19:40,701 INFO L912 BasicCegarLoop]: 80 mSDtfsCounter, 156 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 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 [2022-03-17 23:19:40,701 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 87 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 23:19:40,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32779 states. [2022-03-17 23:19:41,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32779 to 28681. [2022-03-17 23:19:41,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28681 states, 28677 states have (on average 1.3302646720368239) internal successors, (38148), 28677 states have internal predecessors, (38148), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:41,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28681 states to 28681 states and 38151 transitions. [2022-03-17 23:19:41,239 INFO L78 Accepts]: Start accepts. Automaton has 28681 states and 38151 transitions. Word has length 33 [2022-03-17 23:19:41,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:41,239 INFO L478 AbstractCegarLoop]: Abstraction has 28681 states and 38151 transitions. [2022-03-17 23:19:41,239 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:41,239 INFO L276 IsEmpty]: Start isEmpty. Operand 28681 states and 38151 transitions. [2022-03-17 23:19:41,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-17 23:19:41,264 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:41,264 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 23:19:41,264 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-03-17 23:19:41,265 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:41,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:41,266 INFO L85 PathProgramCache]: Analyzing trace with hash -933361592, now seen corresponding path program 1 times [2022-03-17 23:19:41,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:41,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419508676] [2022-03-17 23:19:41,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:41,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:41,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:41,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:41,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:41,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 23:19:41,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:41,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419508676] [2022-03-17 23:19:41,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419508676] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:41,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:41,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:41,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557534335] [2022-03-17 23:19:41,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:41,288 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:41,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:41,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:41,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:41,289 INFO L87 Difference]: Start difference. First operand 28681 states and 38151 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:41,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:41,764 INFO L93 Difference]: Finished difference Result 65549 states and 87305 transitions. [2022-03-17 23:19:41,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:41,765 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-03-17 23:19:41,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:41,876 INFO L225 Difference]: With dead ends: 65549 [2022-03-17 23:19:41,877 INFO L226 Difference]: Without dead ends: 37387 [2022-03-17 23:19:41,897 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 23:19:41,898 INFO L912 BasicCegarLoop]: 130 mSDtfsCounter, 139 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:19:41,898 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 137 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:19:41,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37387 states. [2022-03-17 23:19:42,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37387 to 37385. [2022-03-17 23:19:42,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37385 states, 37381 states have (on average 1.3149995987266259) internal successors, (49156), 37381 states have internal predecessors, (49156), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:42,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37385 states to 37385 states and 49159 transitions. [2022-03-17 23:19:42,442 INFO L78 Accepts]: Start accepts. Automaton has 37385 states and 49159 transitions. Word has length 33 [2022-03-17 23:19:42,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:42,442 INFO L478 AbstractCegarLoop]: Abstraction has 37385 states and 49159 transitions. [2022-03-17 23:19:42,443 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:42,443 INFO L276 IsEmpty]: Start isEmpty. Operand 37385 states and 49159 transitions. [2022-03-17 23:19:42,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-17 23:19:42,462 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:42,463 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 23:19:42,463 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-03-17 23:19:42,463 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:42,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:42,463 INFO L85 PathProgramCache]: Analyzing trace with hash -222714787, now seen corresponding path program 1 times [2022-03-17 23:19:42,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:42,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424827833] [2022-03-17 23:19:42,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:42,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:42,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:42,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:42,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:42,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 23:19:42,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:42,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424827833] [2022-03-17 23:19:42,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424827833] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:42,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:42,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:42,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764628586] [2022-03-17 23:19:42,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:42,481 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:42,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:42,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:42,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:42,482 INFO L87 Difference]: Start difference. First operand 37385 states and 49159 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:42,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:42,893 INFO L93 Difference]: Finished difference Result 56077 states and 73481 transitions. [2022-03-17 23:19:42,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:42,894 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-03-17 23:19:42,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:42,936 INFO L225 Difference]: With dead ends: 56077 [2022-03-17 23:19:42,936 INFO L226 Difference]: Without dead ends: 37899 [2022-03-17 23:19:42,956 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 23:19:42,956 INFO L912 BasicCegarLoop]: 109 mSDtfsCounter, 161 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 116 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 [2022-03-17 23:19:42,957 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 116 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 23:19:42,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37899 states. [2022-03-17 23:19:43,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37899 to 37897. [2022-03-17 23:19:43,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37897 states, 37893 states have (on average 1.2972316786741616) internal successors, (49156), 37893 states have internal predecessors, (49156), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:43,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37897 states to 37897 states and 49159 transitions. [2022-03-17 23:19:43,568 INFO L78 Accepts]: Start accepts. Automaton has 37897 states and 49159 transitions. Word has length 34 [2022-03-17 23:19:43,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:43,568 INFO L478 AbstractCegarLoop]: Abstraction has 37897 states and 49159 transitions. [2022-03-17 23:19:43,568 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:43,568 INFO L276 IsEmpty]: Start isEmpty. Operand 37897 states and 49159 transitions. [2022-03-17 23:19:43,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-17 23:19:43,593 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:43,593 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 23:19:43,593 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-03-17 23:19:43,594 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:43,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:43,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1130594910, now seen corresponding path program 1 times [2022-03-17 23:19:43,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:43,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29836671] [2022-03-17 23:19:43,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:43,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:43,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:43,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:43,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:43,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 23:19:43,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:43,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29836671] [2022-03-17 23:19:43,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29836671] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:43,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:43,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:43,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306553727] [2022-03-17 23:19:43,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:43,613 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:43,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:43,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:43,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:43,613 INFO L87 Difference]: Start difference. First operand 37897 states and 49159 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:44,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:44,321 INFO L93 Difference]: Finished difference Result 110605 states and 141321 transitions. [2022-03-17 23:19:44,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:44,322 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-03-17 23:19:44,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:44,408 INFO L225 Difference]: With dead ends: 110605 [2022-03-17 23:19:44,408 INFO L226 Difference]: Without dead ends: 73739 [2022-03-17 23:19:44,443 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 23:19:44,444 INFO L912 BasicCegarLoop]: 99 mSDtfsCounter, 169 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 106 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 [2022-03-17 23:19:44,444 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 106 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 23:19:44,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73739 states. [2022-03-17 23:19:45,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73739 to 73737. [2022-03-17 23:19:45,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73737 states, 73733 states have (on average 1.2499694844913403) internal successors, (92164), 73733 states have internal predecessors, (92164), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:45,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73737 states to 73737 states and 92167 transitions. [2022-03-17 23:19:45,731 INFO L78 Accepts]: Start accepts. Automaton has 73737 states and 92167 transitions. Word has length 34 [2022-03-17 23:19:45,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:45,731 INFO L478 AbstractCegarLoop]: Abstraction has 73737 states and 92167 transitions. [2022-03-17 23:19:45,731 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:45,731 INFO L276 IsEmpty]: Start isEmpty. Operand 73737 states and 92167 transitions. [2022-03-17 23:19:45,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-17 23:19:45,770 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:45,770 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 23:19:45,770 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-03-17 23:19:45,771 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:45,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:45,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1641129087, now seen corresponding path program 1 times [2022-03-17 23:19:45,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:45,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96530270] [2022-03-17 23:19:45,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:45,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:45,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:45,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:45,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:45,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 23:19:45,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:45,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96530270] [2022-03-17 23:19:45,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96530270] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:45,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:45,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:45,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308853445] [2022-03-17 23:19:45,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:45,789 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:45,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:45,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:45,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:45,790 INFO L87 Difference]: Start difference. First operand 73737 states and 92167 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:46,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:46,677 INFO L93 Difference]: Finished difference Result 79885 states and 102409 transitions. [2022-03-17 23:19:46,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:46,677 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-03-17 23:19:46,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:46,779 INFO L225 Difference]: With dead ends: 79885 [2022-03-17 23:19:46,779 INFO L226 Difference]: Without dead ends: 79883 [2022-03-17 23:19:46,804 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 23:19:46,804 INFO L912 BasicCegarLoop]: 121 mSDtfsCounter, 103 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:19:46,805 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 128 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:19:46,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79883 states. [2022-03-17 23:19:47,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79883 to 73737. [2022-03-17 23:19:47,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73737 states, 73733 states have (on average 1.2360815374391385) internal successors, (91140), 73733 states have internal predecessors, (91140), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:48,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73737 states to 73737 states and 91143 transitions. [2022-03-17 23:19:48,013 INFO L78 Accepts]: Start accepts. Automaton has 73737 states and 91143 transitions. Word has length 34 [2022-03-17 23:19:48,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:48,013 INFO L478 AbstractCegarLoop]: Abstraction has 73737 states and 91143 transitions. [2022-03-17 23:19:48,013 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:48,013 INFO L276 IsEmpty]: Start isEmpty. Operand 73737 states and 91143 transitions. [2022-03-17 23:19:48,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-17 23:19:48,053 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:48,053 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 23:19:48,053 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-03-17 23:19:48,054 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:48,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:48,054 INFO L85 PathProgramCache]: Analyzing trace with hash 688737156, now seen corresponding path program 1 times [2022-03-17 23:19:48,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:48,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869197896] [2022-03-17 23:19:48,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:48,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:48,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:48,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:48,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:48,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 23:19:48,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:48,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869197896] [2022-03-17 23:19:48,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869197896] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:48,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:48,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:48,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307594181] [2022-03-17 23:19:48,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:48,073 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:48,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:48,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:48,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:48,073 INFO L87 Difference]: Start difference. First operand 73737 states and 91143 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:49,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:49,293 INFO L93 Difference]: Finished difference Result 121869 states and 151561 transitions. [2022-03-17 23:19:49,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:49,294 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-03-17 23:19:49,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:49,444 INFO L225 Difference]: With dead ends: 121869 [2022-03-17 23:19:49,444 INFO L226 Difference]: Without dead ends: 121867 [2022-03-17 23:19:49,464 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 23:19:49,465 INFO L912 BasicCegarLoop]: 78 mSDtfsCounter, 142 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:19:49,465 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 85 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:19:49,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121867 states. [2022-03-17 23:19:51,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121867 to 113673. [2022-03-17 23:19:51,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113673 states, 113669 states have (on average 1.2071892952344088) internal successors, (137220), 113669 states have internal predecessors, (137220), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:51,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113673 states to 113673 states and 137223 transitions. [2022-03-17 23:19:51,320 INFO L78 Accepts]: Start accepts. Automaton has 113673 states and 137223 transitions. Word has length 35 [2022-03-17 23:19:51,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:51,320 INFO L478 AbstractCegarLoop]: Abstraction has 113673 states and 137223 transitions. [2022-03-17 23:19:51,320 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:51,320 INFO L276 IsEmpty]: Start isEmpty. Operand 113673 states and 137223 transitions. [2022-03-17 23:19:51,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-17 23:19:51,380 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:51,380 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 23:19:51,380 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-03-17 23:19:51,380 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:51,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:51,381 INFO L85 PathProgramCache]: Analyzing trace with hash 178202979, now seen corresponding path program 1 times [2022-03-17 23:19:51,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:51,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889779933] [2022-03-17 23:19:51,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:51,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:51,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:51,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:51,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:51,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 23:19:51,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:51,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889779933] [2022-03-17 23:19:51,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889779933] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:51,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:51,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:51,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630016437] [2022-03-17 23:19:51,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:51,399 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:51,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:51,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:51,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:51,400 INFO L87 Difference]: Start difference. First operand 113673 states and 137223 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:53,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:53,006 INFO L93 Difference]: Finished difference Result 257037 states and 309257 transitions. [2022-03-17 23:19:53,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:53,007 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-03-17 23:19:53,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:53,399 INFO L225 Difference]: With dead ends: 257037 [2022-03-17 23:19:53,399 INFO L226 Difference]: Without dead ends: 144395 [2022-03-17 23:19:53,453 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 23:19:53,454 INFO L912 BasicCegarLoop]: 134 mSDtfsCounter, 127 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:19:53,454 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 141 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:19:53,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144395 states. [2022-03-17 23:19:55,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144395 to 144393. [2022-03-17 23:19:55,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144393 states, 144389 states have (on average 1.1772918989673729) internal successors, (169988), 144389 states have internal predecessors, (169988), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:55,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144393 states to 144393 states and 169991 transitions. [2022-03-17 23:19:55,973 INFO L78 Accepts]: Start accepts. Automaton has 144393 states and 169991 transitions. Word has length 35 [2022-03-17 23:19:55,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:19:55,973 INFO L478 AbstractCegarLoop]: Abstraction has 144393 states and 169991 transitions. [2022-03-17 23:19:55,973 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:55,973 INFO L276 IsEmpty]: Start isEmpty. Operand 144393 states and 169991 transitions. [2022-03-17 23:19:56,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-17 23:19:56,049 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:19:56,049 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 23:19:56,050 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-03-17 23:19:56,050 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:19:56,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:19:56,050 INFO L85 PathProgramCache]: Analyzing trace with hash -123951206, now seen corresponding path program 1 times [2022-03-17 23:19:56,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:19:56,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431959916] [2022-03-17 23:19:56,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:19:56,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:19:56,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:56,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:19:56,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:19:56,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 23:19:56,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:19:56,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431959916] [2022-03-17 23:19:56,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431959916] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:19:56,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:19:56,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:19:56,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753178105] [2022-03-17 23:19:56,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:19:56,073 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:19:56,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:19:56,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:19:56,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:19:56,073 INFO L87 Difference]: Start difference. First operand 144393 states and 169991 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:19:57,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:19:57,684 INFO L93 Difference]: Finished difference Result 218125 states and 257033 transitions. [2022-03-17 23:19:57,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:19:57,684 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-03-17 23:19:57,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:19:57,869 INFO L225 Difference]: With dead ends: 218125 [2022-03-17 23:19:57,869 INFO L226 Difference]: Without dead ends: 147467 [2022-03-17 23:19:57,944 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 23:19:57,944 INFO L912 BasicCegarLoop]: 103 mSDtfsCounter, 159 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-17 23:19:57,945 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 110 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-17 23:19:58,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147467 states. [2022-03-17 23:20:00,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147467 to 147465. [2022-03-17 23:20:00,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147465 states, 147461 states have (on average 1.1666542340008546) internal successors, (172036), 147461 states have internal predecessors, (172036), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:20:00,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147465 states to 147465 states and 172039 transitions. [2022-03-17 23:20:00,607 INFO L78 Accepts]: Start accepts. Automaton has 147465 states and 172039 transitions. Word has length 36 [2022-03-17 23:20:00,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:20:00,607 INFO L478 AbstractCegarLoop]: Abstraction has 147465 states and 172039 transitions. [2022-03-17 23:20:00,607 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:20:00,607 INFO L276 IsEmpty]: Start isEmpty. Operand 147465 states and 172039 transitions. [2022-03-17 23:20:00,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-17 23:20:00,682 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:20:00,682 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 23:20:00,682 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-03-17 23:20:00,682 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:20:00,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:20:00,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1229358491, now seen corresponding path program 1 times [2022-03-17 23:20:00,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:20:00,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951561004] [2022-03-17 23:20:00,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:20:00,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:20:00,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:00,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:20:00,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:00,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 23:20:00,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:20:00,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951561004] [2022-03-17 23:20:00,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951561004] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:20:00,702 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:20:00,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:20:00,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349199849] [2022-03-17 23:20:00,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:20:00,702 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:20:00,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:20:00,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:20:00,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:20:00,702 INFO L87 Difference]: Start difference. First operand 147465 states and 172039 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:20:02,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:20:02,922 INFO L93 Difference]: Finished difference Result 237579 states and 274440 transitions. [2022-03-17 23:20:02,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:20:02,923 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-03-17 23:20:02,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:20:03,289 INFO L225 Difference]: With dead ends: 237579 [2022-03-17 23:20:03,289 INFO L226 Difference]: Without dead ends: 237577 [2022-03-17 23:20:03,448 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 23:20:03,449 INFO L912 BasicCegarLoop]: 76 mSDtfsCounter, 134 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:20:03,449 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 83 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:20:03,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237577 states. [2022-03-17 23:20:06,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237577 to 229385. [2022-03-17 23:20:06,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229385 states, 229381 states have (on average 1.1428496693274508) internal successors, (262148), 229381 states have internal predecessors, (262148), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:20:06,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229385 states to 229385 states and 262151 transitions. [2022-03-17 23:20:06,973 INFO L78 Accepts]: Start accepts. Automaton has 229385 states and 262151 transitions. Word has length 36 [2022-03-17 23:20:06,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:20:06,974 INFO L478 AbstractCegarLoop]: Abstraction has 229385 states and 262151 transitions. [2022-03-17 23:20:06,974 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:20:06,974 INFO L276 IsEmpty]: Start isEmpty. Operand 229385 states and 262151 transitions. [2022-03-17 23:20:07,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-17 23:20:07,400 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 23:20:07,400 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 23:20:07,401 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-03-17 23:20:07,401 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 23:20:07,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 23:20:07,401 INFO L85 PathProgramCache]: Analyzing trace with hash 718824314, now seen corresponding path program 1 times [2022-03-17 23:20:07,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 23:20:07,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950991800] [2022-03-17 23:20:07,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 23:20:07,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 23:20:07,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:07,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 23:20:07,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 23:20:07,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 23:20:07,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 23:20:07,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950991800] [2022-03-17 23:20:07,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950991800] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 23:20:07,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 23:20:07,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 23:20:07,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655908549] [2022-03-17 23:20:07,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 23:20:07,422 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 23:20:07,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 23:20:07,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 23:20:07,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 23:20:07,422 INFO L87 Difference]: Start difference. First operand 229385 states and 262151 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:20:10,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 23:20:10,327 INFO L93 Difference]: Finished difference Result 512009 states and 577543 transitions. [2022-03-17 23:20:10,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 23:20:10,328 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-03-17 23:20:10,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 23:20:10,328 INFO L225 Difference]: With dead ends: 512009 [2022-03-17 23:20:10,328 INFO L226 Difference]: Without dead ends: 0 [2022-03-17 23:20:10,812 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 23:20:10,813 INFO L912 BasicCegarLoop]: 135 mSDtfsCounter, 118 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 23:20:10,813 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 142 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 23:20:10,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-17 23:20:10,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-17 23:20:10,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-17 23:20:10,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-17 23:20:10,814 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2022-03-17 23:20:10,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 23:20:10,814 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-17 23:20:10,814 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 23:20:10,814 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-17 23:20:10,814 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-17 23:20:10,816 INFO L788 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-17 23:20:10,816 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-03-17 23:20:10,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.