/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/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 21:05:03,417 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 21:05:03,418 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 21:05:03,452 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 21:05:03,466 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 21:05:03,472 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 21:05:03,474 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 21:05:03,476 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 21:05:03,477 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 21:05:03,478 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 21:05:03,483 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 21:05:03,484 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 21:05:03,485 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 21:05:03,491 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 21:05:03,492 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 21:05:03,493 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 21:05:03,495 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 21:05:03,500 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 21:05:03,501 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 21:05:03,502 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 21:05:03,507 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-01-31 21:05:03,522 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 21:05:03,522 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 21:05:03,523 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 21:05:03,523 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 21:05:03,523 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 21:05:03,523 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 21:05:03,523 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 21:05:03,523 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 21:05:03,524 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 21:05:03,524 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 21:05:03,524 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 21:05:03,524 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 21:05:03,524 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 21:05:03,524 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 21:05:03,524 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 21:05:03,524 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 21:05:03,525 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 21:05:03,525 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 21:05:03,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 21:05:03,525 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 21:05:03,525 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 21:05:03,525 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 21:05:03,525 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 21:05:03,525 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 21:05:03,708 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 21:05:03,731 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 21:05:03,733 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 21:05:03,734 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 21:05:03,734 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 21:05:03,735 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c [2022-01-31 21:05:03,786 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b15928004/8f407a6700864b828f46fac63004a3c4/FLAG44480bfd4 [2022-01-31 21:05:04,225 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 21:05:04,226 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c [2022-01-31 21:05:04,236 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b15928004/8f407a6700864b828f46fac63004a3c4/FLAG44480bfd4 [2022-01-31 21:05:04,245 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b15928004/8f407a6700864b828f46fac63004a3c4 [2022-01-31 21:05:04,247 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 21:05:04,248 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 21:05:04,250 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 21:05:04,251 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 21:05:04,253 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 21:05:04,254 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:05:04" (1/1) ... [2022-01-31 21:05:04,254 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d05842b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:05:04, skipping insertion in model container [2022-01-31 21:05:04,255 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:05:04" (1/1) ... [2022-01-31 21:05:04,260 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 21:05:04,295 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 21:05:04,488 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c[8507,8520] [2022-01-31 21:05:04,493 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 21:05:04,499 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 21:05:04,575 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c[8507,8520] [2022-01-31 21:05:04,578 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 21:05:04,588 INFO L208 MainTranslator]: Completed translation [2022-01-31 21:05:04,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:05:04 WrapperNode [2022-01-31 21:05:04,589 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 21:05:04,589 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 21:05:04,590 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 21:05:04,590 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 21:05:04,605 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:05:04" (1/1) ... [2022-01-31 21:05:04,605 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:05:04" (1/1) ... [2022-01-31 21:05:04,615 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:05:04" (1/1) ... [2022-01-31 21:05:04,615 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:05:04" (1/1) ... [2022-01-31 21:05:04,635 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:05:04" (1/1) ... [2022-01-31 21:05:04,638 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:05:04" (1/1) ... [2022-01-31 21:05:04,640 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:05:04" (1/1) ... [2022-01-31 21:05:04,643 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 21:05:04,644 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 21:05:04,644 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 21:05:04,644 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 21:05:04,644 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:05:04" (1/1) ... [2022-01-31 21:05:04,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 21:05:04,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 21:05:04,674 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) [2022-01-31 21:05:04,676 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 [2022-01-31 21:05:04,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 21:05:04,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 21:05:04,701 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 21:05:04,701 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 21:05:04,701 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 21:05:04,701 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 21:05:04,701 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 21:05:04,702 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 21:05:04,702 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2022-01-31 21:05:04,702 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2022-01-31 21:05:04,702 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 21:05:04,702 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 21:05:04,702 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 21:05:04,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 21:05:04,702 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-01-31 21:05:04,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 21:05:04,703 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 21:05:04,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 21:05:04,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 21:05:04,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-01-31 21:05:04,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 21:05:04,830 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 21:05:04,833 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 21:05:05,297 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 21:05:05,305 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 21:05:05,305 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-31 21:05:05,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:05:05 BoogieIcfgContainer [2022-01-31 21:05:05,307 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 21:05:05,309 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 21:05:05,309 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 21:05:05,311 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 21:05:05,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 09:05:04" (1/3) ... [2022-01-31 21:05:05,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3204b726 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:05:05, skipping insertion in model container [2022-01-31 21:05:05,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:05:04" (2/3) ... [2022-01-31 21:05:05,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3204b726 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:05:05, skipping insertion in model container [2022-01-31 21:05:05,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:05:05" (3/3) ... [2022-01-31 21:05:05,313 INFO L111 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+lh-reducer.c [2022-01-31 21:05:05,320 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 21:05:05,320 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 21:05:05,363 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 21:05:05,374 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=JORDAN [2022-01-31 21:05:05,374 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 21:05:05,383 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 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) [2022-01-31 21:05:05,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-31 21:05:05,389 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:05,390 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:05,390 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:05,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:05,394 INFO L85 PathProgramCache]: Analyzing trace with hash -63360149, now seen corresponding path program 1 times [2022-01-31 21:05:05,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:05,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133171840] [2022-01-31 21:05:05,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:05,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:05,456 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:05:05,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:05,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:05,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:05,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:05:05,786 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:05,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133171840] [2022-01-31 21:05:05,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2133171840] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:05,788 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:05,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 21:05:05,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732876881] [2022-01-31 21:05:05,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:05,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 21:05:05,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:05,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 21:05:05,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 21:05:05,825 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 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 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:05,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:05,933 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2022-01-31 21:05:05,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 21:05:05,936 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 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 12 [2022-01-31 21:05:05,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:05,950 INFO L225 Difference]: With dead ends: 38 [2022-01-31 21:05:05,950 INFO L226 Difference]: Without dead ends: 21 [2022-01-31 21:05:05,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 21:05:05,957 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 27 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:05,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 43 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:05:05,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-01-31 21:05:05,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2022-01-31 21:05:05,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 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) [2022-01-31 21:05:05,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2022-01-31 21:05:05,989 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 12 [2022-01-31 21:05:05,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:05,989 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2022-01-31 21:05:05,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:05,990 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2022-01-31 21:05:05,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-31 21:05:05,991 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:05,991 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:05,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 21:05:05,992 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:05,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:05,992 INFO L85 PathProgramCache]: Analyzing trace with hash -2033873229, now seen corresponding path program 1 times [2022-01-31 21:05:05,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:05,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1844798713] [2022-01-31 21:05:05,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:06,008 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:06,008 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:06,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:06,020 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:05:06,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:06,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:06,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:06,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:05:06,184 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:06,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1844798713] [2022-01-31 21:05:06,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1844798713] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:06,186 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:06,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 21:05:06,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098208631] [2022-01-31 21:05:06,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:06,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 21:05:06,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:06,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 21:05:06,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 21:05:06,188 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:06,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:06,343 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2022-01-31 21:05:06,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 21:05:06,344 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 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 17 [2022-01-31 21:05:06,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:06,345 INFO L225 Difference]: With dead ends: 29 [2022-01-31 21:05:06,345 INFO L226 Difference]: Without dead ends: 26 [2022-01-31 21:05:06,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-01-31 21:05:06,351 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:06,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 36 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:05:06,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-31 21:05:06,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2022-01-31 21:05:06,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 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) [2022-01-31 21:05:06,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2022-01-31 21:05:06,359 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 17 [2022-01-31 21:05:06,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:06,359 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2022-01-31 21:05:06,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:06,360 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2022-01-31 21:05:06,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 21:05:06,360 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:06,360 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:06,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 21:05:06,361 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:06,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:06,361 INFO L85 PathProgramCache]: Analyzing trace with hash 2006384747, now seen corresponding path program 2 times [2022-01-31 21:05:06,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:06,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1252240694] [2022-01-31 21:05:06,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:06,365 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:06,365 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:06,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:06,367 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:05:06,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:06,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:06,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:06,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:05:06,523 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:06,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1252240694] [2022-01-31 21:05:06,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1252240694] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:06,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:06,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 21:05:06,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104134698] [2022-01-31 21:05:06,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:06,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 21:05:06,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:06,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 21:05:06,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-31 21:05:06,528 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:06,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:06,697 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2022-01-31 21:05:06,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 21:05:06,698 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-01-31 21:05:06,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:06,698 INFO L225 Difference]: With dead ends: 34 [2022-01-31 21:05:06,698 INFO L226 Difference]: Without dead ends: 31 [2022-01-31 21:05:06,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-01-31 21:05:06,700 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 16 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:06,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 49 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:05:06,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-31 21:05:06,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2022-01-31 21:05:06,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 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) [2022-01-31 21:05:06,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2022-01-31 21:05:06,711 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 22 [2022-01-31 21:05:06,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:06,711 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2022-01-31 21:05:06,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:06,712 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2022-01-31 21:05:06,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 21:05:06,713 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:06,714 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:06,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 21:05:06,714 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:06,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:06,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1862263219, now seen corresponding path program 3 times [2022-01-31 21:05:06,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:06,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [27590610] [2022-01-31 21:05:06,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:06,719 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:06,719 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:06,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:06,722 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:05:06,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:06,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:06,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:06,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:05:06,889 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:06,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [27590610] [2022-01-31 21:05:06,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [27590610] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:06,891 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:06,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 21:05:06,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114282685] [2022-01-31 21:05:06,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:06,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 21:05:06,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:06,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 21:05:06,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-31 21:05:06,894 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 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) [2022-01-31 21:05:07,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:07,089 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2022-01-31 21:05:07,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 21:05:07,090 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 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 [2022-01-31 21:05:07,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:07,091 INFO L225 Difference]: With dead ends: 39 [2022-01-31 21:05:07,091 INFO L226 Difference]: Without dead ends: 36 [2022-01-31 21:05:07,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-01-31 21:05:07,093 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 18 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:07,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 64 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:05:07,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-31 21:05:07,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2022-01-31 21:05:07,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 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) [2022-01-31 21:05:07,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2022-01-31 21:05:07,103 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 27 [2022-01-31 21:05:07,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:07,103 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2022-01-31 21:05:07,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 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) [2022-01-31 21:05:07,103 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2022-01-31 21:05:07,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 21:05:07,104 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:07,104 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:07,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 21:05:07,105 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:07,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:07,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1171819883, now seen corresponding path program 4 times [2022-01-31 21:05:07,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:07,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1746852322] [2022-01-31 21:05:07,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:07,112 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:07,112 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:07,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:07,114 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:05:07,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:07,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:07,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:07,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:05:07,308 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:07,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1746852322] [2022-01-31 21:05:07,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1746852322] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:07,308 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:07,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 21:05:07,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084507444] [2022-01-31 21:05:07,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:07,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 21:05:07,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:07,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 21:05:07,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-01-31 21:05:07,312 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 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) [2022-01-31 21:05:07,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:07,548 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2022-01-31 21:05:07,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 21:05:07,549 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 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 [2022-01-31 21:05:07,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:07,550 INFO L225 Difference]: With dead ends: 44 [2022-01-31 21:05:07,550 INFO L226 Difference]: Without dead ends: 41 [2022-01-31 21:05:07,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-01-31 21:05:07,551 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 20 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:07,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 81 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:05:07,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-01-31 21:05:07,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2022-01-31 21:05:07,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 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) [2022-01-31 21:05:07,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2022-01-31 21:05:07,563 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 32 [2022-01-31 21:05:07,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:07,564 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2022-01-31 21:05:07,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 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) [2022-01-31 21:05:07,564 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2022-01-31 21:05:07,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-31 21:05:07,565 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:07,565 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:07,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 21:05:07,565 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:07,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:07,566 INFO L85 PathProgramCache]: Analyzing trace with hash -55675725, now seen corresponding path program 5 times [2022-01-31 21:05:07,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:07,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [962980740] [2022-01-31 21:05:07,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:07,569 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:07,570 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:07,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:07,572 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:05:07,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:07,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:07,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:07,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:05:07,750 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:07,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [962980740] [2022-01-31 21:05:07,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [962980740] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:07,751 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:07,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 21:05:07,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011765400] [2022-01-31 21:05:07,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:07,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 21:05:07,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:07,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 21:05:07,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-01-31 21:05:07,754 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:08,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:08,025 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2022-01-31 21:05:08,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 21:05:08,026 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-01-31 21:05:08,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:08,027 INFO L225 Difference]: With dead ends: 49 [2022-01-31 21:05:08,027 INFO L226 Difference]: Without dead ends: 46 [2022-01-31 21:05:08,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-01-31 21:05:08,028 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 22 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:08,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 100 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:05:08,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-01-31 21:05:08,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2022-01-31 21:05:08,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 39 states have internal predecessors, (40), 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) [2022-01-31 21:05:08,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2022-01-31 21:05:08,038 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 37 [2022-01-31 21:05:08,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:08,038 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2022-01-31 21:05:08,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:08,038 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2022-01-31 21:05:08,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 21:05:08,039 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:08,039 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:08,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 21:05:08,040 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:08,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:08,040 INFO L85 PathProgramCache]: Analyzing trace with hash -313664917, now seen corresponding path program 6 times [2022-01-31 21:05:08,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:08,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [27251962] [2022-01-31 21:05:08,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:08,043 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:08,043 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:08,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:08,045 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:05:08,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:08,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:08,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:08,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:05:08,204 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:08,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [27251962] [2022-01-31 21:05:08,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [27251962] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:08,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:08,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 21:05:08,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940354543] [2022-01-31 21:05:08,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:08,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 21:05:08,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:08,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 21:05:08,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-01-31 21:05:08,207 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:08,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:08,522 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2022-01-31 21:05:08,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 21:05:08,523 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 1 states have call successors, (2), 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 42 [2022-01-31 21:05:08,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:08,524 INFO L225 Difference]: With dead ends: 54 [2022-01-31 21:05:08,524 INFO L226 Difference]: Without dead ends: 51 [2022-01-31 21:05:08,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-01-31 21:05:08,525 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 24 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:08,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 121 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:05:08,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-01-31 21:05:08,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2022-01-31 21:05:08,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 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) [2022-01-31 21:05:08,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2022-01-31 21:05:08,535 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 42 [2022-01-31 21:05:08,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:08,536 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2022-01-31 21:05:08,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:08,536 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2022-01-31 21:05:08,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 21:05:08,537 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:08,537 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:08,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 21:05:08,537 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:08,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:08,538 INFO L85 PathProgramCache]: Analyzing trace with hash 461457331, now seen corresponding path program 7 times [2022-01-31 21:05:08,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:08,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [972357949] [2022-01-31 21:05:08,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:08,556 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:08,556 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:08,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:08,558 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:05:08,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:08,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:08,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:08,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:05:08,763 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:08,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [972357949] [2022-01-31 21:05:08,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [972357949] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:08,763 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:08,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 21:05:08,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909171764] [2022-01-31 21:05:08,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:08,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 21:05:08,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:08,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 21:05:08,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-01-31 21:05:08,767 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:09,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:09,126 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2022-01-31 21:05:09,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 21:05:09,127 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 1 states have call successors, (2), 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 47 [2022-01-31 21:05:09,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:09,127 INFO L225 Difference]: With dead ends: 59 [2022-01-31 21:05:09,127 INFO L226 Difference]: Without dead ends: 56 [2022-01-31 21:05:09,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-01-31 21:05:09,129 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 26 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:09,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 144 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:05:09,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-01-31 21:05:09,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2022-01-31 21:05:09,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 49 states have internal predecessors, (50), 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) [2022-01-31 21:05:09,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2022-01-31 21:05:09,139 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 47 [2022-01-31 21:05:09,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:09,139 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2022-01-31 21:05:09,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:09,139 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2022-01-31 21:05:09,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 21:05:09,140 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:09,140 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:09,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 21:05:09,140 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:09,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:09,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1346824043, now seen corresponding path program 8 times [2022-01-31 21:05:09,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:09,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1459574189] [2022-01-31 21:05:09,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:09,144 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:09,144 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:09,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:09,146 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:05:09,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:09,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:09,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:09,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:05:09,360 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:09,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1459574189] [2022-01-31 21:05:09,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1459574189] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:09,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:09,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 21:05:09,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790355519] [2022-01-31 21:05:09,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:09,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 21:05:09,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:09,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 21:05:09,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-01-31 21:05:09,361 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:09,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:09,770 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2022-01-31 21:05:09,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 21:05:09,771 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 1 states have call successors, (2), 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 52 [2022-01-31 21:05:09,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:09,772 INFO L225 Difference]: With dead ends: 64 [2022-01-31 21:05:09,772 INFO L226 Difference]: Without dead ends: 61 [2022-01-31 21:05:09,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2022-01-31 21:05:09,773 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 28 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:09,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 169 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 21:05:09,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-01-31 21:05:09,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2022-01-31 21:05:09,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 states have internal predecessors, (55), 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) [2022-01-31 21:05:09,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2022-01-31 21:05:09,783 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 52 [2022-01-31 21:05:09,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:09,783 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2022-01-31 21:05:09,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:09,783 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2022-01-31 21:05:09,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-31 21:05:09,784 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:09,784 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:09,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 21:05:09,785 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:09,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:09,785 INFO L85 PathProgramCache]: Analyzing trace with hash -618112333, now seen corresponding path program 9 times [2022-01-31 21:05:09,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:09,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2097334795] [2022-01-31 21:05:09,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:09,788 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:09,788 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:09,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:09,791 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:05:09,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:10,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:10,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:10,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:05:10,055 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:10,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2097334795] [2022-01-31 21:05:10,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2097334795] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:10,055 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:10,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 21:05:10,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956396855] [2022-01-31 21:05:10,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:10,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 21:05:10,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:10,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 21:05:10,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2022-01-31 21:05:10,056 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:10,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:10,558 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2022-01-31 21:05:10,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 21:05:10,559 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 1 states have call successors, (2), 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 57 [2022-01-31 21:05:10,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:10,559 INFO L225 Difference]: With dead ends: 69 [2022-01-31 21:05:10,559 INFO L226 Difference]: Without dead ends: 66 [2022-01-31 21:05:10,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2022-01-31 21:05:10,561 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 30 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:10,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 196 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 21:05:10,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-31 21:05:10,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2022-01-31 21:05:10,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 59 states have (on average 1.0169491525423728) internal successors, (60), 59 states have internal predecessors, (60), 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) [2022-01-31 21:05:10,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2022-01-31 21:05:10,571 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 57 [2022-01-31 21:05:10,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:10,571 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2022-01-31 21:05:10,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:10,571 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2022-01-31 21:05:10,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 21:05:10,572 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:10,572 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:10,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 21:05:10,572 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:10,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:10,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1391217557, now seen corresponding path program 10 times [2022-01-31 21:05:10,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:10,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958157040] [2022-01-31 21:05:10,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:10,576 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:10,576 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:10,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:10,578 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:05:10,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:10,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:10,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:10,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:05:10,793 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:10,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1958157040] [2022-01-31 21:05:10,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1958157040] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:10,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:10,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 21:05:10,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871306481] [2022-01-31 21:05:10,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:10,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 21:05:10,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:10,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 21:05:10,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2022-01-31 21:05:10,795 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:11,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:11,326 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2022-01-31 21:05:11,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 21:05:11,326 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 1 states have call successors, (2), 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 62 [2022-01-31 21:05:11,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:11,327 INFO L225 Difference]: With dead ends: 74 [2022-01-31 21:05:11,327 INFO L226 Difference]: Without dead ends: 71 [2022-01-31 21:05:11,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2022-01-31 21:05:11,328 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 32 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:11,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 225 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 21:05:11,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-01-31 21:05:11,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2022-01-31 21:05:11,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 64 states have (on average 1.015625) internal successors, (65), 64 states have internal predecessors, (65), 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) [2022-01-31 21:05:11,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2022-01-31 21:05:11,338 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 62 [2022-01-31 21:05:11,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:11,338 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2022-01-31 21:05:11,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:11,338 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2022-01-31 21:05:11,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-31 21:05:11,339 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:11,339 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:11,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 21:05:11,340 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:11,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:11,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1867754931, now seen corresponding path program 11 times [2022-01-31 21:05:11,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:11,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2134920785] [2022-01-31 21:05:11,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:11,343 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:11,343 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:11,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:11,345 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:05:11,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:11,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:11,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:11,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:05:11,581 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:11,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2134920785] [2022-01-31 21:05:11,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2134920785] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:11,581 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:11,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 21:05:11,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075213396] [2022-01-31 21:05:11,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:11,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 21:05:11,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:11,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 21:05:11,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2022-01-31 21:05:11,582 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:12,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:12,123 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2022-01-31 21:05:12,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 21:05:12,123 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 1 states have call successors, (2), 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 67 [2022-01-31 21:05:12,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:12,124 INFO L225 Difference]: With dead ends: 79 [2022-01-31 21:05:12,124 INFO L226 Difference]: Without dead ends: 76 [2022-01-31 21:05:12,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2022-01-31 21:05:12,125 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 34 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:12,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 256 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 21:05:12,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-01-31 21:05:12,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2022-01-31 21:05:12,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 69 states have (on average 1.0144927536231885) internal successors, (70), 69 states have internal predecessors, (70), 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) [2022-01-31 21:05:12,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2022-01-31 21:05:12,135 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 67 [2022-01-31 21:05:12,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:12,136 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2022-01-31 21:05:12,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:12,136 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2022-01-31 21:05:12,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 21:05:12,137 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:12,137 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:12,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 21:05:12,137 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:12,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:12,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1643888277, now seen corresponding path program 12 times [2022-01-31 21:05:12,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:12,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [208386422] [2022-01-31 21:05:12,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:12,140 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:12,140 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:12,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:12,142 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:05:12,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:12,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:12,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:12,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:05:12,392 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:12,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [208386422] [2022-01-31 21:05:12,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [208386422] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:12,392 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:12,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 21:05:12,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318536739] [2022-01-31 21:05:12,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:12,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 21:05:12,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:12,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 21:05:12,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2022-01-31 21:05:12,394 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:13,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:13,019 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2022-01-31 21:05:13,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 21:05:13,019 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 1 states have call successors, (2), 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 72 [2022-01-31 21:05:13,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:13,020 INFO L225 Difference]: With dead ends: 84 [2022-01-31 21:05:13,020 INFO L226 Difference]: Without dead ends: 81 [2022-01-31 21:05:13,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2022-01-31 21:05:13,021 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 36 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:13,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 289 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 776 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 21:05:13,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-01-31 21:05:13,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2022-01-31 21:05:13,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 74 states have (on average 1.0135135135135136) internal successors, (75), 74 states have internal predecessors, (75), 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) [2022-01-31 21:05:13,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2022-01-31 21:05:13,031 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 72 [2022-01-31 21:05:13,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:13,031 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2022-01-31 21:05:13,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:13,032 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2022-01-31 21:05:13,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 21:05:13,032 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:13,033 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:13,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 21:05:13,033 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:13,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:13,033 INFO L85 PathProgramCache]: Analyzing trace with hash 800276659, now seen corresponding path program 13 times [2022-01-31 21:05:13,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:13,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [231209668] [2022-01-31 21:05:13,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:13,036 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:13,036 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:13,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:13,039 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:05:13,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:13,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:13,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:13,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:05:13,331 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:13,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [231209668] [2022-01-31 21:05:13,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [231209668] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:13,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:13,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 21:05:13,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850670750] [2022-01-31 21:05:13,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:13,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 21:05:13,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:13,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 21:05:13,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2022-01-31 21:05:13,333 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 17 states have internal predecessors, (74), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:14,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:14,038 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2022-01-31 21:05:14,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 21:05:14,038 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 17 states have internal predecessors, (74), 1 states have call successors, (2), 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 77 [2022-01-31 21:05:14,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:14,039 INFO L225 Difference]: With dead ends: 89 [2022-01-31 21:05:14,039 INFO L226 Difference]: Without dead ends: 86 [2022-01-31 21:05:14,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=1022, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 21:05:14,040 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 38 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 891 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:14,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 324 Invalid, 921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 891 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 21:05:14,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-01-31 21:05:14,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2022-01-31 21:05:14,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 79 states have (on average 1.0126582278481013) internal successors, (80), 79 states have internal predecessors, (80), 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) [2022-01-31 21:05:14,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2022-01-31 21:05:14,051 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 77 [2022-01-31 21:05:14,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:14,051 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2022-01-31 21:05:14,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 17 states have internal predecessors, (74), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:14,051 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2022-01-31 21:05:14,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-31 21:05:14,052 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:14,052 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:14,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 21:05:14,052 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:14,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:14,053 INFO L85 PathProgramCache]: Analyzing trace with hash 426282603, now seen corresponding path program 14 times [2022-01-31 21:05:14,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:14,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1975791290] [2022-01-31 21:05:14,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:14,055 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:14,055 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:14,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:14,058 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:05:14,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:14,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:14,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:14,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:05:14,346 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:14,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1975791290] [2022-01-31 21:05:14,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1975791290] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:14,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:14,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 21:05:14,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007793727] [2022-01-31 21:05:14,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:14,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 21:05:14,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:14,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 21:05:14,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2022-01-31 21:05:14,348 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 18 states have internal predecessors, (79), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:15,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:15,182 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2022-01-31 21:05:15,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 21:05:15,182 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 18 states have internal predecessors, (79), 1 states have call successors, (2), 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 82 [2022-01-31 21:05:15,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:15,183 INFO L225 Difference]: With dead ends: 94 [2022-01-31 21:05:15,183 INFO L226 Difference]: Without dead ends: 91 [2022-01-31 21:05:15,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=1154, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 21:05:15,184 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 40 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 1014 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 1046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:15,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 361 Invalid, 1046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1014 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 21:05:15,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-01-31 21:05:15,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2022-01-31 21:05:15,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 84 states have (on average 1.0119047619047619) internal successors, (85), 84 states have internal predecessors, (85), 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) [2022-01-31 21:05:15,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2022-01-31 21:05:15,194 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 82 [2022-01-31 21:05:15,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:15,194 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2022-01-31 21:05:15,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 18 states have internal predecessors, (79), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:15,194 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2022-01-31 21:05:15,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-31 21:05:15,196 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:15,196 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:15,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 21:05:15,196 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:15,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:15,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1745415245, now seen corresponding path program 15 times [2022-01-31 21:05:15,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:15,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1604030807] [2022-01-31 21:05:15,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:15,200 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:15,200 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:15,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:15,202 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:05:15,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:15,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:15,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:15,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:05:15,509 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:15,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1604030807] [2022-01-31 21:05:15,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1604030807] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:15,509 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:15,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 21:05:15,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26383748] [2022-01-31 21:05:15,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:15,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 21:05:15,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:15,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 21:05:15,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2022-01-31 21:05:15,510 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand has 20 states, 20 states have (on average 4.2) internal successors, (84), 19 states have internal predecessors, (84), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:16,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:16,405 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2022-01-31 21:05:16,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 21:05:16,406 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.2) internal successors, (84), 19 states have internal predecessors, (84), 1 states have call successors, (2), 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 87 [2022-01-31 21:05:16,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:16,407 INFO L225 Difference]: With dead ends: 99 [2022-01-31 21:05:16,407 INFO L226 Difference]: Without dead ends: 96 [2022-01-31 21:05:16,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=1294, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 21:05:16,408 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 42 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 1179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:16,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 400 Invalid, 1179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1145 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 21:05:16,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-01-31 21:05:16,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2022-01-31 21:05:16,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 89 states have (on average 1.0112359550561798) internal successors, (90), 89 states have internal predecessors, (90), 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) [2022-01-31 21:05:16,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2022-01-31 21:05:16,420 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 87 [2022-01-31 21:05:16,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:16,421 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2022-01-31 21:05:16,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.2) internal successors, (84), 19 states have internal predecessors, (84), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:16,421 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2022-01-31 21:05:16,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-31 21:05:16,422 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:16,422 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:16,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 21:05:16,436 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:16,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:16,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1905302379, now seen corresponding path program 16 times [2022-01-31 21:05:16,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:16,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843841158] [2022-01-31 21:05:16,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:16,440 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:16,440 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:16,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:16,443 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:05:16,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:16,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:16,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:16,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:05:16,827 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:16,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [843841158] [2022-01-31 21:05:16,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [843841158] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:16,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:16,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 21:05:16,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979625363] [2022-01-31 21:05:16,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:16,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 21:05:16,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:16,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 21:05:16,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2022-01-31 21:05:16,829 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand has 21 states, 21 states have (on average 4.238095238095238) internal successors, (89), 20 states have internal predecessors, (89), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:17,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:17,819 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2022-01-31 21:05:17,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 21:05:17,820 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.238095238095238) internal successors, (89), 20 states have internal predecessors, (89), 1 states have call successors, (2), 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 92 [2022-01-31 21:05:17,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:17,821 INFO L225 Difference]: With dead ends: 104 [2022-01-31 21:05:17,821 INFO L226 Difference]: Without dead ends: 101 [2022-01-31 21:05:17,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=118, Invalid=1442, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 21:05:17,822 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 44 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 1284 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 1320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:17,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 441 Invalid, 1320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1284 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 21:05:17,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-01-31 21:05:17,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 98. [2022-01-31 21:05:17,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 94 states have (on average 1.0106382978723405) internal successors, (95), 94 states have internal predecessors, (95), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:17,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2022-01-31 21:05:17,834 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 92 [2022-01-31 21:05:17,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:17,835 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2022-01-31 21:05:17,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.238095238095238) internal successors, (89), 20 states have internal predecessors, (89), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:17,835 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2022-01-31 21:05:17,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-01-31 21:05:17,836 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:17,836 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:17,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 21:05:17,836 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:17,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:17,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1204758195, now seen corresponding path program 17 times [2022-01-31 21:05:17,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:17,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [902677113] [2022-01-31 21:05:17,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:17,839 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:17,839 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:17,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:17,842 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:05:17,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:18,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:18,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:18,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:05:18,209 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:18,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [902677113] [2022-01-31 21:05:18,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [902677113] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:18,209 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:18,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 21:05:18,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756884383] [2022-01-31 21:05:18,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:18,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 21:05:18,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:18,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 21:05:18,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2022-01-31 21:05:18,211 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand has 22 states, 22 states have (on average 4.2727272727272725) internal successors, (94), 21 states have internal predecessors, (94), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:19,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:19,271 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2022-01-31 21:05:19,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 21:05:19,271 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.2727272727272725) internal successors, (94), 21 states have internal predecessors, (94), 1 states have call successors, (2), 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 97 [2022-01-31 21:05:19,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:19,272 INFO L225 Difference]: With dead ends: 109 [2022-01-31 21:05:19,272 INFO L226 Difference]: Without dead ends: 106 [2022-01-31 21:05:19,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=124, Invalid=1598, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 21:05:19,273 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 46 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 1431 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 1469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:19,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 484 Invalid, 1469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1431 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 21:05:19,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-01-31 21:05:19,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 103. [2022-01-31 21:05:19,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 99 states have (on average 1.0101010101010102) internal successors, (100), 99 states have internal predecessors, (100), 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) [2022-01-31 21:05:19,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2022-01-31 21:05:19,286 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 97 [2022-01-31 21:05:19,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:19,286 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2022-01-31 21:05:19,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.2727272727272725) internal successors, (94), 21 states have internal predecessors, (94), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:19,286 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2022-01-31 21:05:19,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 21:05:19,287 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:19,287 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:19,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 21:05:19,287 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:19,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:19,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1422682219, now seen corresponding path program 18 times [2022-01-31 21:05:19,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:19,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [936603496] [2022-01-31 21:05:19,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:19,290 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:19,290 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:19,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:19,292 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:05:19,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:19,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:19,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:19,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:05:19,668 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:19,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [936603496] [2022-01-31 21:05:19,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [936603496] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:19,668 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:19,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 21:05:19,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637631071] [2022-01-31 21:05:19,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:19,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 21:05:19,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:19,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 21:05:19,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2022-01-31 21:05:19,671 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand has 23 states, 23 states have (on average 4.304347826086956) internal successors, (99), 22 states have internal predecessors, (99), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:20,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:20,705 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2022-01-31 21:05:20,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 21:05:20,706 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.304347826086956) internal successors, (99), 22 states have internal predecessors, (99), 1 states have call successors, (2), 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 102 [2022-01-31 21:05:20,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:20,706 INFO L225 Difference]: With dead ends: 114 [2022-01-31 21:05:20,706 INFO L226 Difference]: Without dead ends: 111 [2022-01-31 21:05:20,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=130, Invalid=1762, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 21:05:20,707 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 48 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 1586 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 1626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:20,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 529 Invalid, 1626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1586 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 21:05:20,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-01-31 21:05:20,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 108. [2022-01-31 21:05:20,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 104 states have (on average 1.0096153846153846) internal successors, (105), 104 states have internal predecessors, (105), 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) [2022-01-31 21:05:20,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2022-01-31 21:05:20,720 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 102 [2022-01-31 21:05:20,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:20,721 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2022-01-31 21:05:20,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.304347826086956) internal successors, (99), 22 states have internal predecessors, (99), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:20,721 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2022-01-31 21:05:20,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-01-31 21:05:20,721 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:20,722 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:20,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 21:05:20,722 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:20,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:20,722 INFO L85 PathProgramCache]: Analyzing trace with hash 48986547, now seen corresponding path program 19 times [2022-01-31 21:05:20,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:20,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148567236] [2022-01-31 21:05:20,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:20,725 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:20,725 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:20,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:20,727 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:05:20,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:21,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:21,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:21,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:05:21,115 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:21,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148567236] [2022-01-31 21:05:21,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [148567236] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:21,116 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:21,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 21:05:21,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198059968] [2022-01-31 21:05:21,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:21,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 21:05:21,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:21,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 21:05:21,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2022-01-31 21:05:21,117 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand has 24 states, 24 states have (on average 4.333333333333333) internal successors, (104), 23 states have internal predecessors, (104), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:22,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:22,205 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2022-01-31 21:05:22,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 21:05:22,206 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.333333333333333) internal successors, (104), 23 states have internal predecessors, (104), 1 states have call successors, (2), 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 107 [2022-01-31 21:05:22,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:22,206 INFO L225 Difference]: With dead ends: 119 [2022-01-31 21:05:22,206 INFO L226 Difference]: Without dead ends: 116 [2022-01-31 21:05:22,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=136, Invalid=1934, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 21:05:22,208 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 50 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 1749 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 1791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:22,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 576 Invalid, 1791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1749 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 21:05:22,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-01-31 21:05:22,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 113. [2022-01-31 21:05:22,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 109 states have (on average 1.0091743119266054) internal successors, (110), 109 states have internal predecessors, (110), 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) [2022-01-31 21:05:22,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2022-01-31 21:05:22,220 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 107 [2022-01-31 21:05:22,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:22,221 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2022-01-31 21:05:22,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.333333333333333) internal successors, (104), 23 states have internal predecessors, (104), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:22,221 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2022-01-31 21:05:22,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-01-31 21:05:22,222 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:22,222 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:22,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 21:05:22,222 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:22,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:22,222 INFO L85 PathProgramCache]: Analyzing trace with hash -848562837, now seen corresponding path program 20 times [2022-01-31 21:05:22,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:22,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542968964] [2022-01-31 21:05:22,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:22,227 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:22,227 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:22,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:22,229 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:05:22,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:22,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:22,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:22,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:05:22,656 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:22,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542968964] [2022-01-31 21:05:22,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [542968964] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:22,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:22,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 21:05:22,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616980713] [2022-01-31 21:05:22,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:22,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 21:05:22,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:22,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 21:05:22,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2022-01-31 21:05:22,658 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand has 25 states, 25 states have (on average 4.36) internal successors, (109), 24 states have internal predecessors, (109), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:23,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:23,760 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2022-01-31 21:05:23,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 21:05:23,760 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.36) internal successors, (109), 24 states have internal predecessors, (109), 1 states have call successors, (2), 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 112 [2022-01-31 21:05:23,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:23,761 INFO L225 Difference]: With dead ends: 124 [2022-01-31 21:05:23,761 INFO L226 Difference]: Without dead ends: 121 [2022-01-31 21:05:23,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=142, Invalid=2114, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 21:05:23,762 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 52 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 1920 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 1964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:23,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 625 Invalid, 1964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1920 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 21:05:23,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-01-31 21:05:23,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 118. [2022-01-31 21:05:23,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 114 states have (on average 1.0087719298245614) internal successors, (115), 114 states have internal predecessors, (115), 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) [2022-01-31 21:05:23,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2022-01-31 21:05:23,777 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 112 [2022-01-31 21:05:23,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:23,777 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2022-01-31 21:05:23,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.36) internal successors, (109), 24 states have internal predecessors, (109), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:23,777 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2022-01-31 21:05:23,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-01-31 21:05:23,778 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:23,778 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:23,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 21:05:23,778 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:23,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:23,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1325658957, now seen corresponding path program 21 times [2022-01-31 21:05:23,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:23,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [627386671] [2022-01-31 21:05:23,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:23,781 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:23,781 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:23,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:23,783 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:05:23,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:24,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:24,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:24,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:05:24,237 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:24,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [627386671] [2022-01-31 21:05:24,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [627386671] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:24,237 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:24,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 21:05:24,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449310314] [2022-01-31 21:05:24,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:24,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 21:05:24,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:24,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 21:05:24,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2022-01-31 21:05:24,238 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand has 26 states, 26 states have (on average 4.384615384615385) internal successors, (114), 25 states have internal predecessors, (114), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:25,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:25,464 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2022-01-31 21:05:25,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 21:05:25,465 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.384615384615385) internal successors, (114), 25 states have internal predecessors, (114), 1 states have call successors, (2), 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 117 [2022-01-31 21:05:25,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:25,466 INFO L225 Difference]: With dead ends: 129 [2022-01-31 21:05:25,466 INFO L226 Difference]: Without dead ends: 126 [2022-01-31 21:05:25,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=148, Invalid=2302, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 21:05:25,467 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 54 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 2099 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 2145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 2099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:25,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 676 Invalid, 2145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 2099 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 21:05:25,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-01-31 21:05:25,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2022-01-31 21:05:25,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 119 states have (on average 1.0084033613445378) internal successors, (120), 119 states have internal predecessors, (120), 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) [2022-01-31 21:05:25,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2022-01-31 21:05:25,482 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 117 [2022-01-31 21:05:25,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:25,483 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2022-01-31 21:05:25,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.384615384615385) internal successors, (114), 25 states have internal predecessors, (114), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:25,483 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2022-01-31 21:05:25,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-01-31 21:05:25,483 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:25,484 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:25,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 21:05:25,484 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:25,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:25,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1103053419, now seen corresponding path program 22 times [2022-01-31 21:05:25,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:25,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375661733] [2022-01-31 21:05:25,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:25,488 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:25,488 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:25,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:25,490 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:05:25,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:25,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:25,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:25,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:05:25,949 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:25,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375661733] [2022-01-31 21:05:25,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1375661733] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:25,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:25,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 21:05:25,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738407717] [2022-01-31 21:05:25,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:25,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 21:05:25,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:25,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 21:05:25,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2022-01-31 21:05:25,951 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand has 27 states, 27 states have (on average 4.407407407407407) internal successors, (119), 26 states have internal predecessors, (119), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:27,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:27,231 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2022-01-31 21:05:27,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 21:05:27,232 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.407407407407407) internal successors, (119), 26 states have internal predecessors, (119), 1 states have call successors, (2), 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 122 [2022-01-31 21:05:27,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:27,233 INFO L225 Difference]: With dead ends: 134 [2022-01-31 21:05:27,233 INFO L226 Difference]: Without dead ends: 131 [2022-01-31 21:05:27,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=154, Invalid=2498, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 21:05:27,234 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 56 mSDsluCounter, 696 mSDsCounter, 0 mSdLazyCounter, 2286 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 2334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 2286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:27,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 729 Invalid, 2334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 2286 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 21:05:27,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-01-31 21:05:27,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 128. [2022-01-31 21:05:27,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 124 states have (on average 1.0080645161290323) internal successors, (125), 124 states have internal predecessors, (125), 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) [2022-01-31 21:05:27,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2022-01-31 21:05:27,248 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 122 [2022-01-31 21:05:27,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:27,248 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2022-01-31 21:05:27,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.407407407407407) internal successors, (119), 26 states have internal predecessors, (119), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:27,249 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2022-01-31 21:05:27,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-01-31 21:05:27,249 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:27,249 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:27,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 21:05:27,249 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:27,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:27,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1571872691, now seen corresponding path program 23 times [2022-01-31 21:05:27,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:27,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [847792732] [2022-01-31 21:05:27,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:27,251 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:27,251 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:27,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:27,253 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:05:27,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:27,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:27,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:27,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:05:27,748 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:27,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [847792732] [2022-01-31 21:05:27,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [847792732] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:27,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:27,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 21:05:27,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132020032] [2022-01-31 21:05:27,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:27,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 21:05:27,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:27,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 21:05:27,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2022-01-31 21:05:27,750 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand has 28 states, 28 states have (on average 4.428571428571429) internal successors, (124), 27 states have internal predecessors, (124), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:29,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:29,128 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2022-01-31 21:05:29,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 21:05:29,129 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.428571428571429) internal successors, (124), 27 states have internal predecessors, (124), 1 states have call successors, (2), 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 127 [2022-01-31 21:05:29,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:29,129 INFO L225 Difference]: With dead ends: 139 [2022-01-31 21:05:29,129 INFO L226 Difference]: Without dead ends: 136 [2022-01-31 21:05:29,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=160, Invalid=2702, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 21:05:29,131 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 58 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 2481 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 2531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 2481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:29,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 784 Invalid, 2531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 2481 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 21:05:29,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-01-31 21:05:29,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 133. [2022-01-31 21:05:29,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 129 states have (on average 1.0077519379844961) internal successors, (130), 129 states have internal predecessors, (130), 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) [2022-01-31 21:05:29,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2022-01-31 21:05:29,147 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 127 [2022-01-31 21:05:29,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:29,147 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2022-01-31 21:05:29,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.428571428571429) internal successors, (124), 27 states have internal predecessors, (124), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:29,148 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2022-01-31 21:05:29,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-01-31 21:05:29,148 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:29,148 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:29,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 21:05:29,148 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:29,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:29,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1947619179, now seen corresponding path program 24 times [2022-01-31 21:05:29,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:29,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [179745735] [2022-01-31 21:05:29,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:29,151 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:29,151 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:29,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:29,154 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:05:29,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:29,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:29,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:29,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:05:29,695 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:29,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [179745735] [2022-01-31 21:05:29,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [179745735] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:29,695 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:29,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 21:05:29,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584343956] [2022-01-31 21:05:29,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:29,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 21:05:29,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:29,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 21:05:29,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2022-01-31 21:05:29,697 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand has 29 states, 29 states have (on average 4.448275862068965) internal successors, (129), 28 states have internal predecessors, (129), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:31,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:31,192 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2022-01-31 21:05:31,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 21:05:31,192 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.448275862068965) internal successors, (129), 28 states have internal predecessors, (129), 1 states have call successors, (2), 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 132 [2022-01-31 21:05:31,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:31,193 INFO L225 Difference]: With dead ends: 144 [2022-01-31 21:05:31,193 INFO L226 Difference]: Without dead ends: 141 [2022-01-31 21:05:31,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=166, Invalid=2914, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 21:05:31,194 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 60 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 2684 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 841 SdHoareTripleChecker+Invalid, 2736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 2684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:31,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 841 Invalid, 2736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 2684 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 21:05:31,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-01-31 21:05:31,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 138. [2022-01-31 21:05:31,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 134 states have (on average 1.007462686567164) internal successors, (135), 134 states have internal predecessors, (135), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:31,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2022-01-31 21:05:31,216 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 132 [2022-01-31 21:05:31,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:31,216 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2022-01-31 21:05:31,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.448275862068965) internal successors, (129), 28 states have internal predecessors, (129), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:31,217 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2022-01-31 21:05:31,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-01-31 21:05:31,217 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:31,218 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:31,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 21:05:31,218 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:31,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:31,218 INFO L85 PathProgramCache]: Analyzing trace with hash 951710387, now seen corresponding path program 25 times [2022-01-31 21:05:31,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:31,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1353418703] [2022-01-31 21:05:31,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:31,225 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:31,225 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:31,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:31,229 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:05:31,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:31,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:31,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:31,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:05:31,806 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:31,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1353418703] [2022-01-31 21:05:31,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1353418703] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:31,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:31,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 21:05:31,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384763928] [2022-01-31 21:05:31,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:31,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 21:05:31,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:31,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 21:05:31,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2022-01-31 21:05:31,807 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand has 30 states, 30 states have (on average 4.466666666666667) internal successors, (134), 29 states have internal predecessors, (134), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:33,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:33,395 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2022-01-31 21:05:33,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 21:05:33,396 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.466666666666667) internal successors, (134), 29 states have internal predecessors, (134), 1 states have call successors, (2), 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 137 [2022-01-31 21:05:33,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:33,397 INFO L225 Difference]: With dead ends: 149 [2022-01-31 21:05:33,397 INFO L226 Difference]: Without dead ends: 146 [2022-01-31 21:05:33,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=172, Invalid=3134, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 21:05:33,398 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 62 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 2895 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 900 SdHoareTripleChecker+Invalid, 2949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 2895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:33,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 900 Invalid, 2949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 2895 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 21:05:33,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-01-31 21:05:33,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 143. [2022-01-31 21:05:33,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 139 states have (on average 1.0071942446043165) internal successors, (140), 139 states have internal predecessors, (140), 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) [2022-01-31 21:05:33,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2022-01-31 21:05:33,416 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 137 [2022-01-31 21:05:33,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:33,417 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2022-01-31 21:05:33,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.466666666666667) internal successors, (134), 29 states have internal predecessors, (134), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:33,417 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2022-01-31 21:05:33,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-01-31 21:05:33,417 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:33,418 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:33,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 21:05:33,418 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:33,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:33,418 INFO L85 PathProgramCache]: Analyzing trace with hash -2101273493, now seen corresponding path program 26 times [2022-01-31 21:05:33,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:33,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1986011600] [2022-01-31 21:05:33,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:33,421 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:33,421 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:33,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:33,423 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:05:33,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:33,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:33,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:33,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:05:33,988 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:33,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1986011600] [2022-01-31 21:05:33,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1986011600] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:33,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:33,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 21:05:33,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322349747] [2022-01-31 21:05:33,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:33,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 21:05:33,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:33,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 21:05:33,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2022-01-31 21:05:33,990 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand has 31 states, 31 states have (on average 4.483870967741935) internal successors, (139), 30 states have internal predecessors, (139), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:35,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:35,735 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2022-01-31 21:05:35,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 21:05:35,735 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.483870967741935) internal successors, (139), 30 states have internal predecessors, (139), 1 states have call successors, (2), 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 142 [2022-01-31 21:05:35,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:35,736 INFO L225 Difference]: With dead ends: 154 [2022-01-31 21:05:35,736 INFO L226 Difference]: Without dead ends: 151 [2022-01-31 21:05:35,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=178, Invalid=3362, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 21:05:35,737 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 64 mSDsluCounter, 924 mSDsCounter, 0 mSdLazyCounter, 3114 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 961 SdHoareTripleChecker+Invalid, 3170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 3114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:35,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 961 Invalid, 3170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 3114 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 21:05:35,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-01-31 21:05:35,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 148. [2022-01-31 21:05:35,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 144 states have (on average 1.0069444444444444) internal successors, (145), 144 states have internal predecessors, (145), 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) [2022-01-31 21:05:35,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2022-01-31 21:05:35,759 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 142 [2022-01-31 21:05:35,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:35,760 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2022-01-31 21:05:35,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.483870967741935) internal successors, (139), 30 states have internal predecessors, (139), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:35,761 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2022-01-31 21:05:35,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-01-31 21:05:35,761 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:35,761 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:35,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 21:05:35,762 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:35,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:35,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1782102605, now seen corresponding path program 27 times [2022-01-31 21:05:35,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:35,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [503736797] [2022-01-31 21:05:35,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:07:43,220 WARN L228 SmtUtils]: Spent 2.12m on a formula simplification. DAG size of input: 115 DAG size of output: 111 (called from [L 564] de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.jordan.JordanLoopAcceleration.buildAccelerationFormula) [2022-01-31 21:07:43,223 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 6 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=5}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:07:43,224 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:07:43,224 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:07:43,224 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:07:43,225 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:07:43,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:07:43,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:43,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:07:43,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:43,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:09:40,726 WARN L228 SmtUtils]: Spent 5.02s on a formula simplification. DAG size of input: 212 DAG size of output: 209 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 21:10:58,685 WARN L228 SmtUtils]: Spent 5.89s on a formula simplification. DAG size of input: 258 DAG size of output: 247 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 21:11:27,479 WARN L228 SmtUtils]: Spent 5.28s on a formula simplification. DAG size of input: 269 DAG size of output: 258 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 21:11:52,187 WARN L228 SmtUtils]: Spent 5.24s on a formula simplification. DAG size of input: 257 DAG size of output: 254 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 21:12:03,383 WARN L228 SmtUtils]: Spent 6.30s on a formula simplification. DAG size of input: 276 DAG size of output: 265 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 21:12:38,316 WARN L228 SmtUtils]: Spent 5.98s on a formula simplification. DAG size of input: 285 DAG size of output: 274 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 21:12:47,615 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:12:47,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [503736797] [2022-01-31 21:12:47,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [503736797] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:12:47,615 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:12:47,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-01-31 21:12:47,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529283394] [2022-01-31 21:12:47,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:12:47,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-01-31 21:12:47,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:12:47,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-01-31 21:12:47,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=12792, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 21:12:47,623 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand has 113 states, 113 states have (on average 1.2743362831858407) internal successors, (144), 112 states have internal predecessors, (144), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:13:20,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:13:20,542 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2022-01-31 21:13:20,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-01-31 21:13:20,543 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 1.2743362831858407) internal successors, (144), 112 states have internal predecessors, (144), 1 states have call successors, (2), 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 147 [2022-01-31 21:13:20,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:13:20,544 INFO L225 Difference]: With dead ends: 159 [2022-01-31 21:13:20,544 INFO L226 Difference]: Without dead ends: 156 [2022-01-31 21:13:20,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3504 ImplicationChecksByTransitivity, 303.0s TimeCoverageRelationStatistics Valid=329, Invalid=13243, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 21:13:20,546 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 43 mSDsluCounter, 2527 mSDsCounter, 0 mSdLazyCounter, 9560 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 2564 SdHoareTripleChecker+Invalid, 9591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 9560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:13:20,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 2564 Invalid, 9591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 9560 Invalid, 0 Unknown, 0 Unchecked, 32.5s Time] [2022-01-31 21:13:20,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-01-31 21:13:20,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 153. [2022-01-31 21:13:20,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 149 states have (on average 1.0067114093959733) internal successors, (150), 149 states have internal predecessors, (150), 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) [2022-01-31 21:13:20,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2022-01-31 21:13:20,648 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 147 [2022-01-31 21:13:20,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:13:20,648 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2022-01-31 21:13:20,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 1.2743362831858407) internal successors, (144), 112 states have internal predecessors, (144), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:13:20,648 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2022-01-31 21:13:20,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-01-31 21:13:20,649 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:13:20,649 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:13:20,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 21:13:20,649 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:13:20,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:13:20,650 INFO L85 PathProgramCache]: Analyzing trace with hash -401626773, now seen corresponding path program 28 times [2022-01-31 21:13:20,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:13:20,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1125711909] [2022-01-31 21:13:20,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:13:20,652 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:13:20,652 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:13:20,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:13:20,655 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:13:20,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:13:21,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:13:21,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:13:21,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:13:21,365 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:13:21,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1125711909] [2022-01-31 21:13:21,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1125711909] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:13:21,365 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:13:21,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 21:13:21,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292891310] [2022-01-31 21:13:21,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:13:21,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 21:13:21,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:13:21,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 21:13:21,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 21:13:21,366 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand has 33 states, 33 states have (on average 4.515151515151516) internal successors, (149), 32 states have internal predecessors, (149), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:13:23,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:13:23,662 INFO L93 Difference]: Finished difference Result 164 states and 164 transitions. [2022-01-31 21:13:23,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 21:13:23,662 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 4.515151515151516) internal successors, (149), 32 states have internal predecessors, (149), 1 states have call successors, (2), 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 152 [2022-01-31 21:13:23,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:13:23,663 INFO L225 Difference]: With dead ends: 164 [2022-01-31 21:13:23,663 INFO L226 Difference]: Without dead ends: 161 [2022-01-31 21:13:23,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=190, Invalid=3842, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 21:13:23,664 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 68 mSDsluCounter, 1050 mSDsCounter, 0 mSdLazyCounter, 3576 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 1089 SdHoareTripleChecker+Invalid, 3636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 3576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:13:23,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 1089 Invalid, 3636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 3576 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 21:13:23,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-01-31 21:13:23,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 158. [2022-01-31 21:13:23,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 154 states have (on average 1.0064935064935066) internal successors, (155), 154 states have internal predecessors, (155), 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) [2022-01-31 21:13:23,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2022-01-31 21:13:23,737 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 152 [2022-01-31 21:13:23,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:13:23,737 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2022-01-31 21:13:23,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.515151515151516) internal successors, (149), 32 states have internal predecessors, (149), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:13:23,737 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2022-01-31 21:13:23,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-31 21:13:23,738 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:13:23,738 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:13:23,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 21:13:23,738 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:13:23,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:13:23,739 INFO L85 PathProgramCache]: Analyzing trace with hash -326575949, now seen corresponding path program 29 times [2022-01-31 21:13:23,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:13:23,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [528182433] [2022-01-31 21:13:23,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:13:23,741 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:13:23,741 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:13:23,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:13:23,744 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:13:23,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:13:24,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:13:24,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:13:24,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:13:24,454 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:13:24,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [528182433] [2022-01-31 21:13:24,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [528182433] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:13:24,454 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:13:24,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 21:13:24,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691014127] [2022-01-31 21:13:24,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:13:24,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 21:13:24,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:13:24,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 21:13:24,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 21:13:24,456 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 33 states have internal predecessors, (154), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:13:26,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:13:26,882 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2022-01-31 21:13:26,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 21:13:26,883 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 33 states have internal predecessors, (154), 1 states have call successors, (2), 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 157 [2022-01-31 21:13:26,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:13:26,883 INFO L225 Difference]: With dead ends: 169 [2022-01-31 21:13:26,884 INFO L226 Difference]: Without dead ends: 166 [2022-01-31 21:13:26,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=196, Invalid=4094, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 21:13:26,885 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 70 mSDsluCounter, 1116 mSDsCounter, 0 mSdLazyCounter, 3819 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 1156 SdHoareTripleChecker+Invalid, 3881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 3819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:13:26,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 1156 Invalid, 3881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 3819 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 21:13:26,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-01-31 21:13:26,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 163. [2022-01-31 21:13:26,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 159 states have (on average 1.0062893081761006) internal successors, (160), 159 states have internal predecessors, (160), 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) [2022-01-31 21:13:26,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2022-01-31 21:13:26,971 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 157 [2022-01-31 21:13:26,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:13:26,971 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2022-01-31 21:13:26,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 33 states have internal predecessors, (154), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:13:26,971 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2022-01-31 21:13:26,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-01-31 21:13:26,972 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:13:26,972 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:13:26,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 21:13:26,972 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:13:26,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:13:26,973 INFO L85 PathProgramCache]: Analyzing trace with hash 2052191851, now seen corresponding path program 30 times [2022-01-31 21:13:26,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:13:26,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1638592864] [2022-01-31 21:13:26,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:13:26,975 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:13:26,975 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:13:26,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:13:26,978 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:13:27,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:13:27,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:13:27,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:13:27,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:13:27,733 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:13:27,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1638592864] [2022-01-31 21:13:27,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1638592864] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:13:27,733 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:13:27,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 21:13:27,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027231382] [2022-01-31 21:13:27,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:13:27,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 21:13:27,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:13:27,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 21:13:27,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 21:13:27,735 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand has 35 states, 35 states have (on average 4.542857142857143) internal successors, (159), 34 states have internal predecessors, (159), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:13:30,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:13:30,460 INFO L93 Difference]: Finished difference Result 174 states and 174 transitions. [2022-01-31 21:13:30,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 21:13:30,461 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 4.542857142857143) internal successors, (159), 34 states have internal predecessors, (159), 1 states have call successors, (2), 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 162 [2022-01-31 21:13:30,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:13:30,462 INFO L225 Difference]: With dead ends: 174 [2022-01-31 21:13:30,462 INFO L226 Difference]: Without dead ends: 171 [2022-01-31 21:13:30,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=202, Invalid=4354, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 21:13:30,463 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 72 mSDsluCounter, 1184 mSDsCounter, 0 mSdLazyCounter, 4070 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1225 SdHoareTripleChecker+Invalid, 4134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 4070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:13:30,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 1225 Invalid, 4134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 4070 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-31 21:13:30,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-01-31 21:13:30,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 168. [2022-01-31 21:13:30,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 164 states have (on average 1.0060975609756098) internal successors, (165), 164 states have internal predecessors, (165), 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) [2022-01-31 21:13:30,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 168 transitions. [2022-01-31 21:13:30,529 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 168 transitions. Word has length 162 [2022-01-31 21:13:30,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:13:30,529 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 168 transitions. [2022-01-31 21:13:30,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.542857142857143) internal successors, (159), 34 states have internal predecessors, (159), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:13:30,530 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 168 transitions. [2022-01-31 21:13:30,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-31 21:13:30,530 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:13:30,530 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:13:30,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 21:13:30,530 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:13:30,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:13:30,531 INFO L85 PathProgramCache]: Analyzing trace with hash -659641421, now seen corresponding path program 31 times [2022-01-31 21:13:30,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:13:30,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [915922997] [2022-01-31 21:13:30,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:13:30,533 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:13:30,534 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:13:30,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:13:30,536 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:13:30,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:13:31,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:13:31,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:13:31,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:13:31,298 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:13:31,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [915922997] [2022-01-31 21:13:31,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [915922997] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:13:31,298 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:13:31,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 21:13:31,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030718589] [2022-01-31 21:13:31,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:13:31,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 21:13:31,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:13:31,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 21:13:31,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 21:13:31,299 INFO L87 Difference]: Start difference. First operand 168 states and 168 transitions. Second operand has 36 states, 36 states have (on average 4.555555555555555) internal successors, (164), 35 states have internal predecessors, (164), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:13:34,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:13:34,117 INFO L93 Difference]: Finished difference Result 179 states and 179 transitions. [2022-01-31 21:13:34,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 21:13:34,118 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.555555555555555) internal successors, (164), 35 states have internal predecessors, (164), 1 states have call successors, (2), 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 167 [2022-01-31 21:13:34,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:13:34,119 INFO L225 Difference]: With dead ends: 179 [2022-01-31 21:13:34,119 INFO L226 Difference]: Without dead ends: 176 [2022-01-31 21:13:34,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=208, Invalid=4622, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 21:13:34,120 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 74 mSDsluCounter, 1254 mSDsCounter, 0 mSdLazyCounter, 4329 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 4395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 4329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:13:34,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 1296 Invalid, 4395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 4329 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-31 21:13:34,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-01-31 21:13:34,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 173. [2022-01-31 21:13:34,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 169 states have (on average 1.0059171597633136) internal successors, (170), 169 states have internal predecessors, (170), 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) [2022-01-31 21:13:34,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2022-01-31 21:13:34,225 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 167 [2022-01-31 21:13:34,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:13:34,226 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2022-01-31 21:13:34,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.555555555555555) internal successors, (164), 35 states have internal predecessors, (164), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:13:34,226 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2022-01-31 21:13:34,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-01-31 21:13:34,227 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:13:34,227 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:13:34,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 21:13:34,227 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:13:34,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:13:34,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1809318763, now seen corresponding path program 32 times [2022-01-31 21:13:34,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:13:34,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [674442438] [2022-01-31 21:13:34,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:13:49,794 WARN L228 SmtUtils]: Spent 15.45s on a formula simplification. DAG size of input: 115 DAG size of output: 102 (called from [L 564] de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.jordan.JordanLoopAcceleration.buildAccelerationFormula) [2022-01-31 21:13:49,794 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 6 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=5}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:13:49,795 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:13:49,795 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:13:49,795 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:13:49,795 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:13:49,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:13:49,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:13:49,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:13:49,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:13:49,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:15:53,301 WARN L228 SmtUtils]: Spent 5.94s on a formula simplification. DAG size of input: 233 DAG size of output: 222 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 21:17:22,815 WARN L228 SmtUtils]: Spent 5.08s on a formula simplification. DAG size of input: 250 DAG size of output: 247 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 21:18:03,029 WARN L228 SmtUtils]: Spent 5.13s on a formula simplification. DAG size of input: 278 DAG size of output: 267 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 21:18:30,573 WARN L228 SmtUtils]: Spent 6.42s on a formula simplification. DAG size of input: 266 DAG size of output: 263 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 21:18:42,613 WARN L228 SmtUtils]: Spent 6.41s on a formula simplification. DAG size of input: 285 DAG size of output: 274 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 21:19:08,586 WARN L228 SmtUtils]: Spent 5.37s on a formula simplification. DAG size of input: 277 DAG size of output: 274 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)