/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/loops/insertion_sort-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 20:35:27,546 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 20:35:27,548 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 20:35:27,621 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 20:35:27,638 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 20:35:27,639 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 20:35:27,641 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 20:35:27,643 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 20:35:27,643 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 20:35:27,644 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 20:35:27,647 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 20:35:27,652 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 20:35:27,654 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 20:35:27,655 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 20:35:27,656 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 20:35:27,657 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 20:35:27,664 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 20:35:27,672 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 20:35:27,673 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 20:35:27,673 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 20:35:27,674 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 20:35:27,683 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 20:35:27,683 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 20:35:27,685 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 20:35:27,685 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 20:35:27,685 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 20:35:27,686 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 20:35:27,686 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 20:35:27,686 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 20:35:27,686 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 20:35:27,686 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 20:35:27,687 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 20:35:27,687 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 20:35:27,687 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 20:35:27,687 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 20:35:27,687 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 20:35:27,687 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 20:35:27,688 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 20:35:27,688 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 20:35:27,688 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 20:35:27,688 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 20:35:27,688 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 20:35:27,688 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 20:35:27,688 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 20:35:27,688 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 20:35:27,878 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 20:35:27,897 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 20:35:27,900 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 20:35:27,901 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 20:35:27,902 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 20:35:27,903 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/insertion_sort-2.c [2022-01-31 20:35:27,967 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbbc659c0/c6b2af24ae8943c093f127e53450d4d6/FLAGc054518e2 [2022-01-31 20:35:28,330 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 20:35:28,331 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/insertion_sort-2.c [2022-01-31 20:35:28,337 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbbc659c0/c6b2af24ae8943c093f127e53450d4d6/FLAGc054518e2 [2022-01-31 20:35:28,348 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbbc659c0/c6b2af24ae8943c093f127e53450d4d6 [2022-01-31 20:35:28,350 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 20:35:28,351 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 20:35:28,353 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 20:35:28,353 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 20:35:28,359 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 20:35:28,360 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:35:28" (1/1) ... [2022-01-31 20:35:28,361 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@341d7bd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:35:28, skipping insertion in model container [2022-01-31 20:35:28,361 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:35:28" (1/1) ... [2022-01-31 20:35:28,366 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 20:35:28,380 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 20:35:28,507 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/insertion_sort-2.c[328,341] [2022-01-31 20:35:28,524 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 20:35:28,530 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 20:35:28,539 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/insertion_sort-2.c[328,341] [2022-01-31 20:35:28,546 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 20:35:28,557 INFO L208 MainTranslator]: Completed translation [2022-01-31 20:35:28,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:35:28 WrapperNode [2022-01-31 20:35:28,558 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 20:35:28,559 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 20:35:28,559 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 20:35:28,559 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 20:35:28,567 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:35:28" (1/1) ... [2022-01-31 20:35:28,568 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:35:28" (1/1) ... [2022-01-31 20:35:28,572 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:35:28" (1/1) ... [2022-01-31 20:35:28,573 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:35:28" (1/1) ... [2022-01-31 20:35:28,578 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:35:28" (1/1) ... [2022-01-31 20:35:28,582 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:35:28" (1/1) ... [2022-01-31 20:35:28,584 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:35:28" (1/1) ... [2022-01-31 20:35:28,585 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 20:35:28,586 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 20:35:28,586 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 20:35:28,586 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 20:35:28,587 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:35:28" (1/1) ... [2022-01-31 20:35:28,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 20:35:28,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 20:35:28,618 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 20:35:28,625 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 20:35:28,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 20:35:28,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 20:35:28,654 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 20:35:28,654 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 20:35:28,654 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 20:35:28,654 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 20:35:28,655 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 20:35:28,655 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 20:35:28,655 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 20:35:28,655 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 20:35:28,655 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-01-31 20:35:28,655 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 20:35:28,655 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 20:35:28,656 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 20:35:28,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 20:35:28,656 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 20:35:28,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 20:35:28,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 20:35:28,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 20:35:28,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 20:35:28,709 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 20:35:28,710 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 20:35:28,812 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 20:35:28,818 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 20:35:28,819 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-01-31 20:35:28,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:35:28 BoogieIcfgContainer [2022-01-31 20:35:28,820 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 20:35:28,822 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 20:35:28,822 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 20:35:28,828 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 20:35:28,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 08:35:28" (1/3) ... [2022-01-31 20:35:28,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62f4f9db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:35:28, skipping insertion in model container [2022-01-31 20:35:28,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:35:28" (2/3) ... [2022-01-31 20:35:28,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62f4f9db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:35:28, skipping insertion in model container [2022-01-31 20:35:28,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:35:28" (3/3) ... [2022-01-31 20:35:28,831 INFO L111 eAbstractionObserver]: Analyzing ICFG insertion_sort-2.c [2022-01-31 20:35:28,835 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 20:35:28,835 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 20:35:28,867 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 20:35:28,873 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 20:35:28,873 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 20:35:28,885 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:35:28,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 20:35:28,892 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:35:28,893 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:35:28,893 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:35:28,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:35:28,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1914549692, now seen corresponding path program 1 times [2022-01-31 20:35:28,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:35:28,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [130025292] [2022-01-31 20:35:28,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:35:28,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:35:28,954 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:35:28,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:29,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:35:29,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:29,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:35:29,097 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:35:29,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [130025292] [2022-01-31 20:35:29,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [130025292] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:35:29,099 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:35:29,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 20:35:29,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367091016] [2022-01-31 20:35:29,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:35:29,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 20:35:29,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:35:29,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 20:35:29,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 20:35:29,145 INFO L87 Difference]: Start difference. First operand has 31 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:35:29,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:35:29,213 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2022-01-31 20:35:29,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 20:35:29,217 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-01-31 20:35:29,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:35:29,222 INFO L225 Difference]: With dead ends: 54 [2022-01-31 20:35:29,222 INFO L226 Difference]: Without dead ends: 26 [2022-01-31 20:35:29,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 20:35:29,228 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 26 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:35:29,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 37 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 20:35:29,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-31 20:35:29,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-01-31 20:35:29,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:35:29,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-01-31 20:35:29,266 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 15 [2022-01-31 20:35:29,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:35:29,267 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-01-31 20:35:29,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:35:29,267 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-01-31 20:35:29,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 20:35:29,268 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:35:29,268 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:35:29,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 20:35:29,269 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:35:29,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:35:29,270 INFO L85 PathProgramCache]: Analyzing trace with hash 314290466, now seen corresponding path program 1 times [2022-01-31 20:35:29,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:35:29,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [488876535] [2022-01-31 20:35:29,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:35:29,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:35:29,273 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:35:29,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:29,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:35:29,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:29,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:35:29,398 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:35:29,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [488876535] [2022-01-31 20:35:29,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [488876535] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:35:29,399 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:35:29,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 20:35:29,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983871061] [2022-01-31 20:35:29,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:35:29,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 20:35:29,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:35:29,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 20:35:29,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 20:35:29,401 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:35:29,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:35:29,553 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2022-01-31 20:35:29,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 20:35:29,554 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-01-31 20:35:29,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:35:29,555 INFO L225 Difference]: With dead ends: 49 [2022-01-31 20:35:29,555 INFO L226 Difference]: Without dead ends: 28 [2022-01-31 20:35:29,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-01-31 20:35:29,562 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 31 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:35:29,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 37 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:35:29,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-31 20:35:29,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-01-31 20:35:29,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:35:29,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-01-31 20:35:29,570 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 15 [2022-01-31 20:35:29,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:35:29,570 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-01-31 20:35:29,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:35:29,571 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-01-31 20:35:29,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-31 20:35:29,572 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:35:29,572 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:35:29,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 20:35:29,573 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:35:29,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:35:29,574 INFO L85 PathProgramCache]: Analyzing trace with hash 408725728, now seen corresponding path program 1 times [2022-01-31 20:35:29,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:35:29,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [118106083] [2022-01-31 20:35:29,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:35:29,588 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:35:29,588 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:35:29,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:35:29,590 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:35:29,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:29,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:35:29,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:29,756 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 20:35:29,756 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:35:29,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [118106083] [2022-01-31 20:35:29,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [118106083] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:35:29,756 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:35:29,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 20:35:29,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269790603] [2022-01-31 20:35:29,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:35:29,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 20:35:29,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:35:29,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 20:35:29,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-01-31 20:35:29,758 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:35:29,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:35:29,996 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2022-01-31 20:35:29,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 20:35:29,997 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 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 20:35:29,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:35:29,998 INFO L225 Difference]: With dead ends: 49 [2022-01-31 20:35:29,999 INFO L226 Difference]: Without dead ends: 30 [2022-01-31 20:35:30,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-01-31 20:35:30,011 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 50 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:35:30,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 41 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:35:30,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-31 20:35:30,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-01-31 20:35:30,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:35:30,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-01-31 20:35:30,025 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 17 [2022-01-31 20:35:30,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:35:30,025 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-01-31 20:35:30,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:35:30,026 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-01-31 20:35:30,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-31 20:35:30,026 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:35:30,027 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:35:30,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 20:35:30,027 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:35:30,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:35:30,028 INFO L85 PathProgramCache]: Analyzing trace with hash 966699294, now seen corresponding path program 2 times [2022-01-31 20:35:30,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:35:30,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1271905746] [2022-01-31 20:35:30,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:35:30,031 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:35:30,031 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:35:30,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:35:30,033 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:35:30,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:30,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:35:30,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:30,266 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 20:35:30,266 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:35:30,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1271905746] [2022-01-31 20:35:30,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1271905746] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:35:30,266 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:35:30,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 20:35:30,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457020344] [2022-01-31 20:35:30,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:35:30,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 20:35:30,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:35:30,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 20:35:30,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-01-31 20:35:30,268 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:35:30,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:35:30,549 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2022-01-31 20:35:30,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 20:35:30,550 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-01-31 20:35:30,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:35:30,554 INFO L225 Difference]: With dead ends: 58 [2022-01-31 20:35:30,554 INFO L226 Difference]: Without dead ends: 47 [2022-01-31 20:35:30,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-01-31 20:35:30,558 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 99 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:35:30,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 44 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:35:30,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-01-31 20:35:30,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 30. [2022-01-31 20:35:30,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:35:30,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-01-31 20:35:30,583 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 19 [2022-01-31 20:35:30,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:35:30,584 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-01-31 20:35:30,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:35:30,584 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-01-31 20:35:30,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 20:35:30,586 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:35:30,586 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:35:30,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 20:35:30,587 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:35:30,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:35:30,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1080556849, now seen corresponding path program 1 times [2022-01-31 20:35:30,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:35:30,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1034880584] [2022-01-31 20:35:30,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:35:30,594 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:35:30,594 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:35:30,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:35:30,601 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:35:30,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:31,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:35:31,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:31,062 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 20:35:31,063 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:35:31,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1034880584] [2022-01-31 20:35:31,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1034880584] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:35:31,063 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:35:31,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 20:35:31,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553915941] [2022-01-31 20:35:31,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:35:31,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 20:35:31,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:35:31,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 20:35:31,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-31 20:35:31,066 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:35:31,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:35:31,573 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2022-01-31 20:35:31,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 20:35:31,574 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-01-31 20:35:31,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:35:31,577 INFO L225 Difference]: With dead ends: 65 [2022-01-31 20:35:31,579 INFO L226 Difference]: Without dead ends: 63 [2022-01-31 20:35:31,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=213, Invalid=843, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 20:35:31,586 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 86 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:35:31,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 60 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:35:31,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-01-31 20:35:31,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 44. [2022-01-31 20:35:31,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 36 states have (on average 1.25) internal successors, (45), 37 states have internal predecessors, (45), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:35:31,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2022-01-31 20:35:31,604 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 25 [2022-01-31 20:35:31,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:35:31,604 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2022-01-31 20:35:31,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:35:31,605 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2022-01-31 20:35:31,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 20:35:31,607 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:35:31,607 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:35:31,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 20:35:31,608 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:35:31,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:35:31,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1781621427, now seen corresponding path program 1 times [2022-01-31 20:35:31,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:35:31,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [382561304] [2022-01-31 20:35:31,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:35:31,612 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:35:31,612 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:35:31,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:35:31,613 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:35:31,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:31,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:35:31,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:31,666 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 20:35:31,666 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:35:31,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [382561304] [2022-01-31 20:35:31,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [382561304] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:35:31,666 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:35:31,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 20:35:31,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050435129] [2022-01-31 20:35:31,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:35:31,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 20:35:31,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:35:31,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 20:35:31,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 20:35:31,668 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:35:31,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:35:31,760 INFO L93 Difference]: Finished difference Result 82 states and 99 transitions. [2022-01-31 20:35:31,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 20:35:31,761 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-01-31 20:35:31,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:35:31,763 INFO L225 Difference]: With dead ends: 82 [2022-01-31 20:35:31,763 INFO L226 Difference]: Without dead ends: 51 [2022-01-31 20:35:31,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-01-31 20:35:31,764 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 46 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:35:31,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 35 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 20:35:31,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-01-31 20:35:31,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2022-01-31 20:35:31,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 38 states have (on average 1.236842105263158) internal successors, (47), 39 states have internal predecessors, (47), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:35:31,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2022-01-31 20:35:31,784 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 25 [2022-01-31 20:35:31,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:35:31,784 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2022-01-31 20:35:31,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:35:31,784 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2022-01-31 20:35:31,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 20:35:31,785 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:35:31,785 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:35:31,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 20:35:31,785 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:35:31,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:35:31,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1755898038, now seen corresponding path program 1 times [2022-01-31 20:35:31,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:35:31,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1210978188] [2022-01-31 20:35:31,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:35:31,788 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:35:31,789 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:35:31,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:35:31,790 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:35:31,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:32,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:35:32,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:32,203 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 20:35:32,204 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:35:32,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1210978188] [2022-01-31 20:35:32,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1210978188] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:35:32,204 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:35:32,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 20:35:32,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164871731] [2022-01-31 20:35:32,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:35:32,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 20:35:32,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:35:32,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 20:35:32,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-01-31 20:35:32,207 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 16 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:35:32,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:35:32,839 INFO L93 Difference]: Finished difference Result 111 states and 138 transitions. [2022-01-31 20:35:32,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 20:35:32,840 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 16 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-01-31 20:35:32,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:35:32,841 INFO L225 Difference]: With dead ends: 111 [2022-01-31 20:35:32,841 INFO L226 Difference]: Without dead ends: 80 [2022-01-31 20:35:32,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=203, Invalid=987, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 20:35:32,842 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 82 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:35:32,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 58 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:35:32,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-01-31 20:35:32,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 50. [2022-01-31 20:35:32,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 43 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:35:32,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2022-01-31 20:35:32,871 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 28 [2022-01-31 20:35:32,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:35:32,871 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2022-01-31 20:35:32,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 16 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:35:32,872 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2022-01-31 20:35:32,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 20:35:32,872 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:35:32,872 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:35:32,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 20:35:32,873 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:35:32,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:35:32,873 INFO L85 PathProgramCache]: Analyzing trace with hash -990333180, now seen corresponding path program 2 times [2022-01-31 20:35:32,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:35:32,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1022738791] [2022-01-31 20:35:32,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:35:32,875 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:35:32,875 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:35:32,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:35:32,876 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:35:32,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:33,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:35:33,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:33,030 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 20:35:33,031 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:35:33,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1022738791] [2022-01-31 20:35:33,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1022738791] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:35:33,032 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:35:33,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 20:35:33,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131360819] [2022-01-31 20:35:33,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:35:33,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 20:35:33,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:35:33,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 20:35:33,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-01-31 20:35:33,033 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:35:33,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:35:33,315 INFO L93 Difference]: Finished difference Result 125 states and 152 transitions. [2022-01-31 20:35:33,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 20:35:33,315 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-01-31 20:35:33,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:35:33,316 INFO L225 Difference]: With dead ends: 125 [2022-01-31 20:35:33,316 INFO L226 Difference]: Without dead ends: 91 [2022-01-31 20:35:33,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-01-31 20:35:33,317 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 104 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:35:33,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 60 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:35:33,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-01-31 20:35:33,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63. [2022-01-31 20:35:33,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 56 states have internal predecessors, (67), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:35:33,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2022-01-31 20:35:33,350 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 31 [2022-01-31 20:35:33,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:35:33,350 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2022-01-31 20:35:33,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:35:33,350 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2022-01-31 20:35:33,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 20:35:33,351 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:35:33,351 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:35:33,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 20:35:33,351 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:35:33,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:35:33,352 INFO L85 PathProgramCache]: Analyzing trace with hash -405243253, now seen corresponding path program 1 times [2022-01-31 20:35:33,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:35:33,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1469450693] [2022-01-31 20:35:33,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:35:33,354 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:35:33,354 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:35:33,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:35:33,355 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:35:33,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:33,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:35:33,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:33,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-31 20:35:33,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:33,502 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 20:35:33,503 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:35:33,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1469450693] [2022-01-31 20:35:33,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1469450693] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:35:33,504 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:35:33,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 20:35:33,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162983639] [2022-01-31 20:35:33,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:35:33,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 20:35:33,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:35:33,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 20:35:33,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-01-31 20:35:33,507 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:35:33,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:35:33,786 INFO L93 Difference]: Finished difference Result 100 states and 118 transitions. [2022-01-31 20:35:33,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 20:35:33,786 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2022-01-31 20:35:33,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:35:33,787 INFO L225 Difference]: With dead ends: 100 [2022-01-31 20:35:33,787 INFO L226 Difference]: Without dead ends: 73 [2022-01-31 20:35:33,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2022-01-31 20:35:33,788 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 103 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:35:33,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 48 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:35:33,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-01-31 20:35:33,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 58. [2022-01-31 20:35:33,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 50 states have (on average 1.2) internal successors, (60), 51 states have internal predecessors, (60), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:35:33,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2022-01-31 20:35:33,820 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 33 [2022-01-31 20:35:33,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:35:33,820 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2022-01-31 20:35:33,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:35:33,820 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2022-01-31 20:35:33,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 20:35:33,821 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:35:33,821 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:35:33,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 20:35:33,822 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:35:33,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:35:33,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1306424002, now seen corresponding path program 3 times [2022-01-31 20:35:33,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:35:33,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [664149834] [2022-01-31 20:35:33,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:35:33,824 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:35:33,824 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:35:33,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:35:33,826 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:35:33,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:34,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:35:34,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:34,173 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 20:35:34,173 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:35:34,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [664149834] [2022-01-31 20:35:34,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [664149834] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:35:34,174 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:35:34,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 20:35:34,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274577617] [2022-01-31 20:35:34,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:35:34,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 20:35:34,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:35:34,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 20:35:34,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-01-31 20:35:34,175 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:35:35,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:35:35,064 INFO L93 Difference]: Finished difference Result 135 states and 164 transitions. [2022-01-31 20:35:35,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 20:35:35,065 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-01-31 20:35:35,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:35:35,066 INFO L225 Difference]: With dead ends: 135 [2022-01-31 20:35:35,066 INFO L226 Difference]: Without dead ends: 101 [2022-01-31 20:35:35,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=292, Invalid=1348, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 20:35:35,068 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 109 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:35:35,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 51 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:35:35,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-01-31 20:35:35,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 71. [2022-01-31 20:35:35,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 63 states have (on average 1.2222222222222223) internal successors, (77), 64 states have internal predecessors, (77), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:35:35,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 84 transitions. [2022-01-31 20:35:35,116 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 84 transitions. Word has length 33 [2022-01-31 20:35:35,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:35:35,117 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 84 transitions. [2022-01-31 20:35:35,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:35:35,118 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 84 transitions. [2022-01-31 20:35:35,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 20:35:35,125 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:35:35,125 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:35:35,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 20:35:35,125 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:35:35,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:35:35,126 INFO L85 PathProgramCache]: Analyzing trace with hash -350564349, now seen corresponding path program 1 times [2022-01-31 20:35:35,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:35:35,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1419240715] [2022-01-31 20:35:35,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:35:35,130 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:35:35,130 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:35:35,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:35:35,132 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:35:35,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:35,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:35:35,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:35,467 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 20:35:35,467 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:35:35,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1419240715] [2022-01-31 20:35:35,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1419240715] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:35:35,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:35:35,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 20:35:35,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568074197] [2022-01-31 20:35:35,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:35:35,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 20:35:35,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:35:35,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 20:35:35,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-01-31 20:35:35,470 INFO L87 Difference]: Start difference. First operand 71 states and 84 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:35:36,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:35:36,380 INFO L93 Difference]: Finished difference Result 179 states and 227 transitions. [2022-01-31 20:35:36,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 20:35:36,381 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-01-31 20:35:36,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:35:36,382 INFO L225 Difference]: With dead ends: 179 [2022-01-31 20:35:36,382 INFO L226 Difference]: Without dead ends: 177 [2022-01-31 20:35:36,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=324, Invalid=1656, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 20:35:36,384 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 199 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:35:36,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 52 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:35:36,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-01-31 20:35:36,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 86. [2022-01-31 20:35:36,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 78 states have (on average 1.3076923076923077) internal successors, (102), 79 states have internal predecessors, (102), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:35:36,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 109 transitions. [2022-01-31 20:35:36,427 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 109 transitions. Word has length 36 [2022-01-31 20:35:36,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:35:36,427 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 109 transitions. [2022-01-31 20:35:36,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:35:36,427 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 109 transitions. [2022-01-31 20:35:36,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 20:35:36,429 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:35:36,429 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:35:36,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 20:35:36,429 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:35:36,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:35:36,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1169352267, now seen corresponding path program 2 times [2022-01-31 20:35:36,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:35:36,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [457007183] [2022-01-31 20:35:36,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:35:36,432 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:35:36,432 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:35:36,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:35:36,435 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:35:36,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:36,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:35:36,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:36,901 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 20:35:36,901 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:35:36,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [457007183] [2022-01-31 20:35:36,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [457007183] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:35:36,901 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:35:36,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 20:35:36,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596024524] [2022-01-31 20:35:36,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:35:36,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 20:35:36,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:35:36,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 20:35:36,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-01-31 20:35:36,903 INFO L87 Difference]: Start difference. First operand 86 states and 109 transitions. Second operand has 21 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:35:38,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:35:38,007 INFO L93 Difference]: Finished difference Result 211 states and 272 transitions. [2022-01-31 20:35:38,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 20:35:38,007 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-01-31 20:35:38,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:35:38,008 INFO L225 Difference]: With dead ends: 211 [2022-01-31 20:35:38,008 INFO L226 Difference]: Without dead ends: 164 [2022-01-31 20:35:38,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=324, Invalid=1838, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 20:35:38,010 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 124 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 939 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 1012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:35:38,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 83 Invalid, 1012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 939 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:35:38,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-01-31 20:35:38,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 97. [2022-01-31 20:35:38,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 89 states have (on average 1.3146067415730338) internal successors, (117), 90 states have internal predecessors, (117), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:35:38,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 124 transitions. [2022-01-31 20:35:38,050 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 124 transitions. Word has length 36 [2022-01-31 20:35:38,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:35:38,050 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 124 transitions. [2022-01-31 20:35:38,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:35:38,050 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 124 transitions. [2022-01-31 20:35:38,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 20:35:38,051 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:35:38,051 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:35:38,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 20:35:38,051 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:35:38,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:35:38,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1631396062, now seen corresponding path program 2 times [2022-01-31 20:35:38,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:35:38,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833733866] [2022-01-31 20:35:38,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:35:38,053 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:35:38,054 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:35:38,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:35:38,055 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:35:38,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:38,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:35:38,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:38,112 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 20:35:38,113 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:35:38,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833733866] [2022-01-31 20:35:38,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1833733866] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:35:38,113 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:35:38,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 20:35:38,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361872213] [2022-01-31 20:35:38,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:35:38,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 20:35:38,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:35:38,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 20:35:38,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-01-31 20:35:38,114 INFO L87 Difference]: Start difference. First operand 97 states and 124 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:35:38,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:35:38,428 INFO L93 Difference]: Finished difference Result 172 states and 219 transitions. [2022-01-31 20:35:38,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 20:35:38,429 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-01-31 20:35:38,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:35:38,429 INFO L225 Difference]: With dead ends: 172 [2022-01-31 20:35:38,429 INFO L226 Difference]: Without dead ends: 108 [2022-01-31 20:35:38,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2022-01-31 20:35:38,431 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 86 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:35:38,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 52 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:35:38,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-01-31 20:35:38,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 74. [2022-01-31 20:35:38,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 66 states have (on average 1.2424242424242424) internal successors, (82), 67 states have internal predecessors, (82), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:35:38,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 89 transitions. [2022-01-31 20:35:38,458 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 89 transitions. Word has length 39 [2022-01-31 20:35:38,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:35:38,459 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 89 transitions. [2022-01-31 20:35:38,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:35:38,459 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 89 transitions. [2022-01-31 20:35:38,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 20:35:38,459 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:35:38,459 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:35:38,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 20:35:38,460 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:35:38,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:35:38,460 INFO L85 PathProgramCache]: Analyzing trace with hash -930331484, now seen corresponding path program 3 times [2022-01-31 20:35:38,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:35:38,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1951896937] [2022-01-31 20:35:38,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:35:38,462 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:35:38,462 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:35:38,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:35:38,463 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:35:38,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:38,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:35:38,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:38,828 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 20:35:38,828 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:35:38,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1951896937] [2022-01-31 20:35:38,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1951896937] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:35:38,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:35:38,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 20:35:38,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283058506] [2022-01-31 20:35:38,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:35:38,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 20:35:38,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:35:38,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 20:35:38,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-01-31 20:35:38,829 INFO L87 Difference]: Start difference. First operand 74 states and 89 transitions. Second operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 18 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:35:39,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:35:39,738 INFO L93 Difference]: Finished difference Result 131 states and 159 transitions. [2022-01-31 20:35:39,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 20:35:39,738 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 18 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-01-31 20:35:39,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:35:39,739 INFO L225 Difference]: With dead ends: 131 [2022-01-31 20:35:39,739 INFO L226 Difference]: Without dead ends: 129 [2022-01-31 20:35:39,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=473, Invalid=2077, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 20:35:39,741 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 161 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:35:39,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 57 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:35:39,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-01-31 20:35:39,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 74. [2022-01-31 20:35:39,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 66 states have (on average 1.2424242424242424) internal successors, (82), 67 states have internal predecessors, (82), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:35:39,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 89 transitions. [2022-01-31 20:35:39,768 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 89 transitions. Word has length 39 [2022-01-31 20:35:39,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:35:39,769 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 89 transitions. [2022-01-31 20:35:39,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 18 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:35:39,769 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 89 transitions. [2022-01-31 20:35:39,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-31 20:35:39,769 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:35:39,769 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:35:39,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 20:35:39,769 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:35:39,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:35:39,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1624035100, now seen corresponding path program 2 times [2022-01-31 20:35:39,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:35:39,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [43813109] [2022-01-31 20:35:39,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:35:39,772 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:35:39,772 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:35:39,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:35:39,773 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:35:39,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:39,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:35:39,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:39,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-31 20:35:39,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:39,963 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 20:35:39,964 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:35:39,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [43813109] [2022-01-31 20:35:39,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [43813109] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:35:39,964 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:35:39,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 20:35:39,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751890035] [2022-01-31 20:35:39,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:35:39,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 20:35:39,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:35:39,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 20:35:39,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-01-31 20:35:39,965 INFO L87 Difference]: Start difference. First operand 74 states and 89 transitions. Second operand has 15 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:35:40,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:35:40,442 INFO L93 Difference]: Finished difference Result 114 states and 137 transitions. [2022-01-31 20:35:40,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 20:35:40,443 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2022-01-31 20:35:40,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:35:40,444 INFO L225 Difference]: With dead ends: 114 [2022-01-31 20:35:40,444 INFO L226 Difference]: Without dead ends: 112 [2022-01-31 20:35:40,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=783, Unknown=0, NotChecked=0, Total=930 [2022-01-31 20:35:40,447 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 107 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:35:40,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 83 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:35:40,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-01-31 20:35:40,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 93. [2022-01-31 20:35:40,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 82 states have (on average 1.2195121951219512) internal successors, (100), 84 states have internal predecessors, (100), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 20:35:40,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 111 transitions. [2022-01-31 20:35:40,487 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 111 transitions. Word has length 41 [2022-01-31 20:35:40,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:35:40,487 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 111 transitions. [2022-01-31 20:35:40,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:35:40,487 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 111 transitions. [2022-01-31 20:35:40,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 20:35:40,488 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:35:40,488 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:35:40,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 20:35:40,489 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:35:40,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:35:40,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1436661232, now seen corresponding path program 3 times [2022-01-31 20:35:40,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:35:40,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1186506176] [2022-01-31 20:35:40,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:35:40,491 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:35:40,491 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:35:40,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:35:40,492 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:35:40,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:40,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:35:40,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:40,617 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 20:35:40,617 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:35:40,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1186506176] [2022-01-31 20:35:40,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1186506176] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:35:40,617 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:35:40,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 20:35:40,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008121674] [2022-01-31 20:35:40,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:35:40,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 20:35:40,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:35:40,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 20:35:40,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-01-31 20:35:40,618 INFO L87 Difference]: Start difference. First operand 93 states and 111 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:35:41,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:35:41,010 INFO L93 Difference]: Finished difference Result 184 states and 225 transitions. [2022-01-31 20:35:41,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 20:35:41,010 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 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 20:35:41,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:35:41,011 INFO L225 Difference]: With dead ends: 184 [2022-01-31 20:35:41,011 INFO L226 Difference]: Without dead ends: 152 [2022-01-31 20:35:41,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-01-31 20:35:41,013 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 151 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:35:41,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 71 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:35:41,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-01-31 20:35:41,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 122. [2022-01-31 20:35:41,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 111 states have (on average 1.2162162162162162) internal successors, (135), 113 states have internal predecessors, (135), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 20:35:41,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 146 transitions. [2022-01-31 20:35:41,076 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 146 transitions. Word has length 42 [2022-01-31 20:35:41,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:35:41,076 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 146 transitions. [2022-01-31 20:35:41,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:35:41,076 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 146 transitions. [2022-01-31 20:35:41,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 20:35:41,077 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:35:41,077 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:35:41,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 20:35:41,077 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:35:41,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:35:41,078 INFO L85 PathProgramCache]: Analyzing trace with hash -2084807843, now seen corresponding path program 1 times [2022-01-31 20:35:41,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:35:41,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2105576801] [2022-01-31 20:35:41,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:35:41,080 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:35:41,080 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:35:41,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:35:41,081 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:35:41,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:41,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:35:41,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:41,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-31 20:35:41,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:41,282 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 20:35:41,283 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:35:41,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2105576801] [2022-01-31 20:35:41,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2105576801] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:35:41,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:35:41,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 20:35:41,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748888982] [2022-01-31 20:35:41,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:35:41,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 20:35:41,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:35:41,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 20:35:41,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2022-01-31 20:35:41,284 INFO L87 Difference]: Start difference. First operand 122 states and 146 transitions. Second operand has 15 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:35:41,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:35:41,847 INFO L93 Difference]: Finished difference Result 158 states and 188 transitions. [2022-01-31 20:35:41,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 20:35:41,848 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2022-01-31 20:35:41,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:35:41,849 INFO L225 Difference]: With dead ends: 158 [2022-01-31 20:35:41,849 INFO L226 Difference]: Without dead ends: 156 [2022-01-31 20:35:41,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2022-01-31 20:35:41,850 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 105 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:35:41,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 96 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:35:41,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-01-31 20:35:41,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 122. [2022-01-31 20:35:41,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 111 states have (on average 1.2162162162162162) internal successors, (135), 113 states have internal predecessors, (135), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 20:35:41,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 146 transitions. [2022-01-31 20:35:41,897 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 146 transitions. Word has length 44 [2022-01-31 20:35:41,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:35:41,897 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 146 transitions. [2022-01-31 20:35:41,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:35:41,898 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 146 transitions. [2022-01-31 20:35:41,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 20:35:41,898 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:35:41,898 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:35:41,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 20:35:41,898 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:35:41,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:35:41,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1979815022, now seen corresponding path program 4 times [2022-01-31 20:35:41,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:35:41,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1512185986] [2022-01-31 20:35:41,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:35:41,900 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:35:41,900 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:35:41,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:35:41,901 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:35:41,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:42,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:35:42,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:42,436 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 20:35:42,436 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:35:42,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1512185986] [2022-01-31 20:35:42,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1512185986] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:35:42,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:35:42,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 20:35:42,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597035591] [2022-01-31 20:35:42,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:35:42,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 20:35:42,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:35:42,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 20:35:42,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-01-31 20:35:42,438 INFO L87 Difference]: Start difference. First operand 122 states and 146 transitions. Second operand has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 21 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:35:43,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:35:43,384 INFO L93 Difference]: Finished difference Result 210 states and 257 transitions. [2022-01-31 20:35:43,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 20:35:43,384 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 21 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-01-31 20:35:43,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:35:43,386 INFO L225 Difference]: With dead ends: 210 [2022-01-31 20:35:43,386 INFO L226 Difference]: Without dead ends: 208 [2022-01-31 20:35:43,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=387, Invalid=2063, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 20:35:43,387 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 159 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:35:43,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 76 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 775 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:35:43,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-01-31 20:35:43,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 133. [2022-01-31 20:35:43,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 122 states have (on average 1.2377049180327868) internal successors, (151), 124 states have internal predecessors, (151), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 20:35:43,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 162 transitions. [2022-01-31 20:35:43,476 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 162 transitions. Word has length 44 [2022-01-31 20:35:43,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:35:43,476 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 162 transitions. [2022-01-31 20:35:43,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 21 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:35:43,476 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 162 transitions. [2022-01-31 20:35:43,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 20:35:43,477 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:35:43,477 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:35:43,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 20:35:43,477 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:35:43,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:35:43,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1128449496, now seen corresponding path program 5 times [2022-01-31 20:35:43,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:35:43,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1693354532] [2022-01-31 20:35:43,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:35:43,479 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:35:43,479 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:35:43,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:35:43,480 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:35:43,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:43,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:35:43,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:43,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:35:43,909 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:35:43,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1693354532] [2022-01-31 20:35:43,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1693354532] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:35:43,909 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:35:43,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 20:35:43,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169345405] [2022-01-31 20:35:43,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:35:43,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 20:35:43,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:35:43,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 20:35:43,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-01-31 20:35:43,910 INFO L87 Difference]: Start difference. First operand 133 states and 162 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:35:44,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:35:44,928 INFO L93 Difference]: Finished difference Result 209 states and 254 transitions. [2022-01-31 20:35:44,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 20:35:44,929 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-01-31 20:35:44,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:35:44,930 INFO L225 Difference]: With dead ends: 209 [2022-01-31 20:35:44,930 INFO L226 Difference]: Without dead ends: 207 [2022-01-31 20:35:44,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=304, Invalid=1588, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 20:35:44,931 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 172 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 1068 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 1165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:35:44,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 102 Invalid, 1165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1068 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:35:44,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-01-31 20:35:44,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 153. [2022-01-31 20:35:44,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 140 states have (on average 1.2357142857142858) internal successors, (173), 143 states have internal predecessors, (173), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 20:35:44,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 186 transitions. [2022-01-31 20:35:44,997 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 186 transitions. Word has length 44 [2022-01-31 20:35:44,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:35:44,997 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 186 transitions. [2022-01-31 20:35:44,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:35:44,998 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 186 transitions. [2022-01-31 20:35:44,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 20:35:44,998 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:35:44,998 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:35:44,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 20:35:44,999 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:35:44,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:35:44,999 INFO L85 PathProgramCache]: Analyzing trace with hash -459898406, now seen corresponding path program 4 times [2022-01-31 20:35:44,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:35:44,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2099089940] [2022-01-31 20:35:44,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:35:45,000 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:35:45,000 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:35:45,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:35:45,001 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:35:45,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:45,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:35:45,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:45,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:35:45,046 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:35:45,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2099089940] [2022-01-31 20:35:45,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2099089940] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:35:45,046 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:35:45,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 20:35:45,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281256554] [2022-01-31 20:35:45,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:35:45,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 20:35:45,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:35:45,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 20:35:45,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-01-31 20:35:45,048 INFO L87 Difference]: Start difference. First operand 153 states and 186 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:35:45,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:35:45,309 INFO L93 Difference]: Finished difference Result 253 states and 313 transitions. [2022-01-31 20:35:45,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 20:35:45,309 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-01-31 20:35:45,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:35:45,310 INFO L225 Difference]: With dead ends: 253 [2022-01-31 20:35:45,310 INFO L226 Difference]: Without dead ends: 180 [2022-01-31 20:35:45,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-01-31 20:35:45,311 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 101 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:35:45,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 46 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:35:45,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-01-31 20:35:45,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 152. [2022-01-31 20:35:45,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 139 states have (on average 1.1798561151079137) internal successors, (164), 142 states have internal predecessors, (164), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 20:35:45,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 177 transitions. [2022-01-31 20:35:45,374 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 177 transitions. Word has length 44 [2022-01-31 20:35:45,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:35:45,374 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 177 transitions. [2022-01-31 20:35:45,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:35:45,374 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 177 transitions. [2022-01-31 20:35:45,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 20:35:45,375 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:35:45,375 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:35:45,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 20:35:45,375 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:35:45,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:35:45,375 INFO L85 PathProgramCache]: Analyzing trace with hash -172816864, now seen corresponding path program 5 times [2022-01-31 20:35:45,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:35:45,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [709846858] [2022-01-31 20:35:45,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:35:45,377 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:35:45,377 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:35:45,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:35:45,378 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:35:45,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:45,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:35:45,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:45,982 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 20:35:45,982 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:35:45,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [709846858] [2022-01-31 20:35:45,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [709846858] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:35:45,983 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:35:45,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 20:35:45,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329236244] [2022-01-31 20:35:45,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:35:45,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 20:35:45,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:35:45,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 20:35:45,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-01-31 20:35:45,984 INFO L87 Difference]: Start difference. First operand 152 states and 177 transitions. Second operand has 24 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:35:47,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:35:47,042 INFO L93 Difference]: Finished difference Result 241 states and 283 transitions. [2022-01-31 20:35:47,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 20:35:47,043 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-01-31 20:35:47,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:35:47,044 INFO L225 Difference]: With dead ends: 241 [2022-01-31 20:35:47,044 INFO L226 Difference]: Without dead ends: 239 [2022-01-31 20:35:47,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=317, Invalid=2133, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 20:35:47,045 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 181 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1072 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:35:47,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 63 Invalid, 1166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1072 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:35:47,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-01-31 20:35:47,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 161. [2022-01-31 20:35:47,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 148 states have (on average 1.1824324324324325) internal successors, (175), 151 states have internal predecessors, (175), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 20:35:47,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 188 transitions. [2022-01-31 20:35:47,122 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 188 transitions. Word has length 44 [2022-01-31 20:35:47,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:35:47,122 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 188 transitions. [2022-01-31 20:35:47,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:35:47,123 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 188 transitions. [2022-01-31 20:35:47,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 20:35:47,123 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:35:47,123 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:35:47,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 20:35:47,123 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:35:47,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:35:47,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1585209602, now seen corresponding path program 1 times [2022-01-31 20:35:47,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:35:47,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2095093536] [2022-01-31 20:35:47,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:35:47,126 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:35:47,126 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:35:47,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:35:47,127 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:35:47,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:47,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:35:47,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:47,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-01-31 20:35:47,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:47,660 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 20:35:47,660 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:35:47,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2095093536] [2022-01-31 20:35:47,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2095093536] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:35:47,660 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:35:47,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 20:35:47,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198969383] [2022-01-31 20:35:47,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:35:47,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 20:35:47,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:35:47,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 20:35:47,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-01-31 20:35:47,661 INFO L87 Difference]: Start difference. First operand 161 states and 188 transitions. Second operand has 26 states, 25 states have (on average 1.64) internal successors, (41), 24 states have internal predecessors, (41), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:35:49,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:35:49,421 INFO L93 Difference]: Finished difference Result 241 states and 283 transitions. [2022-01-31 20:35:49,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 20:35:49,423 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.64) internal successors, (41), 24 states have internal predecessors, (41), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 47 [2022-01-31 20:35:49,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:35:49,424 INFO L225 Difference]: With dead ends: 241 [2022-01-31 20:35:49,424 INFO L226 Difference]: Without dead ends: 239 [2022-01-31 20:35:49,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=585, Invalid=3575, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 20:35:49,426 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 176 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 1138 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 1287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 1138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:35:49,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 83 Invalid, 1287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 1138 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 20:35:49,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-01-31 20:35:49,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 176. [2022-01-31 20:35:49,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 163 states have (on average 1.1840490797546013) internal successors, (193), 166 states have internal predecessors, (193), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 20:35:49,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 206 transitions. [2022-01-31 20:35:49,508 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 206 transitions. Word has length 47 [2022-01-31 20:35:49,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:35:49,509 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 206 transitions. [2022-01-31 20:35:49,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.64) internal successors, (41), 24 states have internal predecessors, (41), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:35:49,509 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 206 transitions. [2022-01-31 20:35:49,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-31 20:35:49,509 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:35:49,509 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:35:49,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 20:35:49,509 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:35:49,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:35:49,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1571697014, now seen corresponding path program 3 times [2022-01-31 20:35:49,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:35:49,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1326374020] [2022-01-31 20:35:49,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:35:49,511 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:35:49,512 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:35:49,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:35:49,513 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:35:49,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:49,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:35:49,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:49,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-31 20:35:49,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:49,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-31 20:35:49,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:49,638 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 20:35:49,638 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:35:49,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1326374020] [2022-01-31 20:35:49,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1326374020] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:35:49,638 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:35:49,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 20:35:49,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943270271] [2022-01-31 20:35:49,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:35:49,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 20:35:49,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:35:49,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 20:35:49,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-01-31 20:35:49,639 INFO L87 Difference]: Start difference. First operand 176 states and 206 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:35:50,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:35:50,020 INFO L93 Difference]: Finished difference Result 217 states and 254 transitions. [2022-01-31 20:35:50,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 20:35:50,027 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 49 [2022-01-31 20:35:50,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:35:50,029 INFO L225 Difference]: With dead ends: 217 [2022-01-31 20:35:50,029 INFO L226 Difference]: Without dead ends: 172 [2022-01-31 20:35:50,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2022-01-31 20:35:50,030 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 127 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:35:50,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 66 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:35:50,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-01-31 20:35:50,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 153. [2022-01-31 20:35:50,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 141 states have (on average 1.148936170212766) internal successors, (162), 144 states have internal predecessors, (162), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 20:35:50,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 174 transitions. [2022-01-31 20:35:50,096 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 174 transitions. Word has length 49 [2022-01-31 20:35:50,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:35:50,097 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 174 transitions. [2022-01-31 20:35:50,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:35:50,097 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 174 transitions. [2022-01-31 20:35:50,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 20:35:50,097 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:35:50,098 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:35:50,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 20:35:50,098 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:35:50,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:35:50,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1212783309, now seen corresponding path program 6 times [2022-01-31 20:35:50,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:35:50,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [345019794] [2022-01-31 20:35:50,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:35:50,100 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:35:50,100 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:35:50,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:35:50,101 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:35:50,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:50,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:35:50,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:50,559 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 20:35:50,559 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:35:50,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [345019794] [2022-01-31 20:35:50,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [345019794] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:35:50,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:35:50,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 20:35:50,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324137845] [2022-01-31 20:35:50,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:35:50,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 20:35:50,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:35:50,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 20:35:50,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-01-31 20:35:50,560 INFO L87 Difference]: Start difference. First operand 153 states and 174 transitions. Second operand has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:35:52,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:35:52,214 INFO L93 Difference]: Finished difference Result 259 states and 305 transitions. [2022-01-31 20:35:52,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 20:35:52,216 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 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 20:35:52,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:35:52,217 INFO L225 Difference]: With dead ends: 259 [2022-01-31 20:35:52,217 INFO L226 Difference]: Without dead ends: 257 [2022-01-31 20:35:52,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1426 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=740, Invalid=4230, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 20:35:52,219 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 241 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 1506 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 1506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:35:52,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 96 Invalid, 1709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 1506 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 20:35:52,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-01-31 20:35:52,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 164. [2022-01-31 20:35:52,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 152 states have (on average 1.1644736842105263) internal successors, (177), 155 states have internal predecessors, (177), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 20:35:52,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 189 transitions. [2022-01-31 20:35:52,307 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 189 transitions. Word has length 47 [2022-01-31 20:35:52,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:35:52,307 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 189 transitions. [2022-01-31 20:35:52,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:35:52,307 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 189 transitions. [2022-01-31 20:35:52,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 20:35:52,308 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:35:52,308 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:35:52,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 20:35:52,308 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:35:52,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:35:52,309 INFO L85 PathProgramCache]: Analyzing trace with hash -511718731, now seen corresponding path program 6 times [2022-01-31 20:35:52,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:35:52,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [999371236] [2022-01-31 20:35:52,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:35:52,310 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:35:52,310 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:35:52,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:35:52,312 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:35:52,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:52,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:35:52,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:52,372 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 20:35:52,372 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:35:52,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [999371236] [2022-01-31 20:35:52,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [999371236] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:35:52,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:35:52,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 20:35:52,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136734755] [2022-01-31 20:35:52,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:35:52,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 20:35:52,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:35:52,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 20:35:52,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-01-31 20:35:52,374 INFO L87 Difference]: Start difference. First operand 164 states and 189 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:35:52,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:35:52,829 INFO L93 Difference]: Finished difference Result 237 states and 284 transitions. [2022-01-31 20:35:52,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 20:35:52,829 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 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 20:35:52,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:35:52,831 INFO L225 Difference]: With dead ends: 237 [2022-01-31 20:35:52,831 INFO L226 Difference]: Without dead ends: 214 [2022-01-31 20:35:52,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2022-01-31 20:35:52,832 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 100 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:35:52,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 60 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:35:52,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-01-31 20:35:52,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 170. [2022-01-31 20:35:52,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 158 states have (on average 1.1708860759493671) internal successors, (185), 161 states have internal predecessors, (185), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 20:35:52,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 197 transitions. [2022-01-31 20:35:52,922 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 197 transitions. Word has length 47 [2022-01-31 20:35:52,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:35:52,922 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 197 transitions. [2022-01-31 20:35:52,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:35:52,923 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 197 transitions. [2022-01-31 20:35:52,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 20:35:52,923 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:35:52,923 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:35:52,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 20:35:52,924 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:35:52,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:35:52,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1895537965, now seen corresponding path program 7 times [2022-01-31 20:35:52,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:35:52,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [526257172] [2022-01-31 20:35:52,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:35:52,926 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:35:52,926 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:35:52,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:35:52,927 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:35:52,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:53,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:35:53,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:53,527 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 20:35:53,527 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:35:53,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [526257172] [2022-01-31 20:35:53,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [526257172] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:35:53,527 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:35:53,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 20:35:53,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747271662] [2022-01-31 20:35:53,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:35:53,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 20:35:53,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:35:53,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 20:35:53,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-01-31 20:35:53,529 INFO L87 Difference]: Start difference. First operand 170 states and 197 transitions. Second operand has 25 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:35:54,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:35:54,880 INFO L93 Difference]: Finished difference Result 262 states and 307 transitions. [2022-01-31 20:35:54,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 20:35:54,881 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 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 20:35:54,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:35:54,882 INFO L225 Difference]: With dead ends: 262 [2022-01-31 20:35:54,882 INFO L226 Difference]: Without dead ends: 223 [2022-01-31 20:35:54,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=487, Invalid=2935, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 20:35:54,883 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 145 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 1304 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 1413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:35:54,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 102 Invalid, 1413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1304 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 20:35:54,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-01-31 20:35:55,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 178. [2022-01-31 20:35:55,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 166 states have (on average 1.1746987951807228) internal successors, (195), 169 states have internal predecessors, (195), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 20:35:55,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 207 transitions. [2022-01-31 20:35:55,013 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 207 transitions. Word has length 47 [2022-01-31 20:35:55,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:35:55,013 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 207 transitions. [2022-01-31 20:35:55,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:35:55,013 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 207 transitions. [2022-01-31 20:35:55,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 20:35:55,014 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:35:55,014 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:35:55,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 20:35:55,014 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:35:55,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:35:55,014 INFO L85 PathProgramCache]: Analyzing trace with hash -879512715, now seen corresponding path program 7 times [2022-01-31 20:35:55,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:35:55,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1944003780] [2022-01-31 20:35:55,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:35:55,015 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:35:55,016 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:35:55,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:35:55,017 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:35:55,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:55,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:35:55,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:55,419 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 20:35:55,420 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:35:55,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1944003780] [2022-01-31 20:35:55,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1944003780] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:35:55,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:35:55,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 20:35:55,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886148968] [2022-01-31 20:35:55,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:35:55,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 20:35:55,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:35:55,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 20:35:55,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-01-31 20:35:55,421 INFO L87 Difference]: Start difference. First operand 178 states and 207 transitions. Second operand has 20 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:35:56,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:35:56,429 INFO L93 Difference]: Finished difference Result 210 states and 243 transitions. [2022-01-31 20:35:56,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 20:35:56,430 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 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 20:35:56,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:35:56,430 INFO L225 Difference]: With dead ends: 210 [2022-01-31 20:35:56,431 INFO L226 Difference]: Without dead ends: 208 [2022-01-31 20:35:56,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=317, Invalid=1663, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 20:35:56,431 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 157 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:35:56,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 66 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 711 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:35:56,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-01-31 20:35:56,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 169. [2022-01-31 20:35:56,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 158 states have (on average 1.1708860759493671) internal successors, (185), 160 states have internal predecessors, (185), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 20:35:56,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 195 transitions. [2022-01-31 20:35:56,535 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 195 transitions. Word has length 47 [2022-01-31 20:35:56,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:35:56,535 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 195 transitions. [2022-01-31 20:35:56,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:35:56,535 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 195 transitions. [2022-01-31 20:35:56,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 20:35:56,536 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:35:56,536 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:35:56,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 20:35:56,536 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:35:56,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:35:56,536 INFO L85 PathProgramCache]: Analyzing trace with hash -2050746395, now seen corresponding path program 8 times [2022-01-31 20:35:56,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:35:56,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2008862379] [2022-01-31 20:35:56,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:35:56,538 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:35:56,538 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:35:56,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:35:56,539 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:35:56,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:57,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:35:57,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:57,103 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 20:35:57,103 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:35:57,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2008862379] [2022-01-31 20:35:57,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2008862379] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:35:57,103 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:35:57,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 20:35:57,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778103680] [2022-01-31 20:35:57,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:35:57,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 20:35:57,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:35:57,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 20:35:57,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-01-31 20:35:57,104 INFO L87 Difference]: Start difference. First operand 169 states and 195 transitions. Second operand has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:35:57,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:35:57,927 INFO L93 Difference]: Finished difference Result 227 states and 264 transitions. [2022-01-31 20:35:57,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 20:35:57,928 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 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 20:35:57,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:35:57,929 INFO L225 Difference]: With dead ends: 227 [2022-01-31 20:35:57,929 INFO L226 Difference]: Without dead ends: 225 [2022-01-31 20:35:57,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=297, Invalid=1773, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 20:35:57,930 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 171 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:35:57,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 69 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:35:57,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-01-31 20:35:58,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 181. [2022-01-31 20:35:58,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 170 states have (on average 1.1823529411764706) internal successors, (201), 172 states have internal predecessors, (201), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 20:35:58,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 211 transitions. [2022-01-31 20:35:58,058 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 211 transitions. Word has length 47 [2022-01-31 20:35:58,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:35:58,059 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 211 transitions. [2022-01-31 20:35:58,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:35:58,059 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 211 transitions. [2022-01-31 20:35:58,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-31 20:35:58,059 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:35:58,060 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:35:58,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 20:35:58,060 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:35:58,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:35:58,060 INFO L85 PathProgramCache]: Analyzing trace with hash 183964909, now seen corresponding path program 4 times [2022-01-31 20:35:58,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:35:58,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [617501591] [2022-01-31 20:35:58,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:35:58,064 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:35:58,064 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:35:58,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:35:58,065 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:35:58,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:58,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:35:58,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:58,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-31 20:35:58,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:58,329 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 20:35:58,329 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:35:58,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [617501591] [2022-01-31 20:35:58,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [617501591] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:35:58,329 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:35:58,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 20:35:58,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975887194] [2022-01-31 20:35:58,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:35:58,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 20:35:58,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:35:58,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 20:35:58,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2022-01-31 20:35:58,331 INFO L87 Difference]: Start difference. First operand 181 states and 211 transitions. Second operand has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:35:59,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:35:59,136 INFO L93 Difference]: Finished difference Result 221 states and 259 transitions. [2022-01-31 20:35:59,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 20:35:59,137 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49 [2022-01-31 20:35:59,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:35:59,138 INFO L225 Difference]: With dead ends: 221 [2022-01-31 20:35:59,138 INFO L226 Difference]: Without dead ends: 219 [2022-01-31 20:35:59,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=168, Invalid=1022, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 20:35:59,139 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 99 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:35:59,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 82 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:35:59,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-01-31 20:35:59,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 204. [2022-01-31 20:35:59,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 190 states have (on average 1.1842105263157894) internal successors, (225), 193 states have internal predecessors, (225), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 20:35:59,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 239 transitions. [2022-01-31 20:35:59,240 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 239 transitions. Word has length 49 [2022-01-31 20:35:59,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:35:59,240 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 239 transitions. [2022-01-31 20:35:59,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:35:59,241 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 239 transitions. [2022-01-31 20:35:59,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 20:35:59,241 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:35:59,242 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:35:59,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 20:35:59,242 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:35:59,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:35:59,242 INFO L85 PathProgramCache]: Analyzing trace with hash -42029369, now seen corresponding path program 2 times [2022-01-31 20:35:59,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:35:59,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1721240392] [2022-01-31 20:35:59,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:35:59,244 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:35:59,244 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:35:59,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:35:59,245 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:35:59,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:59,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:35:59,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:59,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 20:35:59,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:59,970 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 20:35:59,970 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:35:59,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1721240392] [2022-01-31 20:35:59,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1721240392] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:35:59,970 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:35:59,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 20:35:59,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865225071] [2022-01-31 20:35:59,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:35:59,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 20:35:59,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:35:59,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 20:35:59,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2022-01-31 20:35:59,971 INFO L87 Difference]: Start difference. First operand 204 states and 239 transitions. Second operand has 28 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:36:01,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:36:01,374 INFO L93 Difference]: Finished difference Result 226 states and 264 transitions. [2022-01-31 20:36:01,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 20:36:01,374 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 50 [2022-01-31 20:36:01,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:36:01,375 INFO L225 Difference]: With dead ends: 226 [2022-01-31 20:36:01,375 INFO L226 Difference]: Without dead ends: 186 [2022-01-31 20:36:01,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1019 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=485, Invalid=3297, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 20:36:01,377 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 131 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1131 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 1237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:36:01,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 73 Invalid, 1237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1131 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:36:01,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-01-31 20:36:01,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 161. [2022-01-31 20:36:01,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 150 states have (on average 1.2133333333333334) internal successors, (182), 152 states have internal predecessors, (182), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 20:36:01,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 193 transitions. [2022-01-31 20:36:01,469 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 193 transitions. Word has length 50 [2022-01-31 20:36:01,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:36:01,469 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 193 transitions. [2022-01-31 20:36:01,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:36:01,469 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 193 transitions. [2022-01-31 20:36:01,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 20:36:01,470 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:36:01,470 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:36:01,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 20:36:01,470 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:36:01,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:36:01,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1165803103, now seen corresponding path program 8 times [2022-01-31 20:36:01,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:36:01,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1412075569] [2022-01-31 20:36:01,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:36:01,472 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:36:01,473 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:36:01,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:36:01,474 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:36:01,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:01,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:36:01,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:01,620 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 20:36:01,620 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:36:01,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1412075569] [2022-01-31 20:36:01,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1412075569] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:36:01,621 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:36:01,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 20:36:01,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098807267] [2022-01-31 20:36:01,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:36:01,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 20:36:01,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:36:01,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 20:36:01,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-01-31 20:36:01,622 INFO L87 Difference]: Start difference. First operand 161 states and 193 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:36:02,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:36:02,184 INFO L93 Difference]: Finished difference Result 394 states and 481 transitions. [2022-01-31 20:36:02,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 20:36:02,184 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-01-31 20:36:02,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:36:02,185 INFO L225 Difference]: With dead ends: 394 [2022-01-31 20:36:02,185 INFO L226 Difference]: Without dead ends: 323 [2022-01-31 20:36:02,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-01-31 20:36:02,186 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 194 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:36:02,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 71 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:36:02,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-01-31 20:36:02,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 230. [2022-01-31 20:36:02,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 219 states have (on average 1.2054794520547945) internal successors, (264), 221 states have internal predecessors, (264), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 20:36:02,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 275 transitions. [2022-01-31 20:36:02,312 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 275 transitions. Word has length 50 [2022-01-31 20:36:02,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:36:02,312 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 275 transitions. [2022-01-31 20:36:02,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:36:02,312 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 275 transitions. [2022-01-31 20:36:02,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 20:36:02,313 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:36:02,313 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:36:02,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 20:36:02,313 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:36:02,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:36:02,314 INFO L85 PathProgramCache]: Analyzing trace with hash 904028532, now seen corresponding path program 9 times [2022-01-31 20:36:02,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:36:02,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1728501115] [2022-01-31 20:36:02,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:36:02,315 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:36:02,315 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:36:02,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:36:02,316 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:36:02,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:02,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:36:02,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:02,687 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 20:36:02,687 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:36:02,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1728501115] [2022-01-31 20:36:02,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1728501115] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:36:02,687 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:36:02,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 20:36:02,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209222433] [2022-01-31 20:36:02,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:36:02,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 20:36:02,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:36:02,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 20:36:02,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-01-31 20:36:02,688 INFO L87 Difference]: Start difference. First operand 230 states and 275 transitions. Second operand has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:36:03,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:36:03,857 INFO L93 Difference]: Finished difference Result 365 states and 439 transitions. [2022-01-31 20:36:03,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 20:36:03,858 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-01-31 20:36:03,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:36:03,860 INFO L225 Difference]: With dead ends: 365 [2022-01-31 20:36:03,860 INFO L226 Difference]: Without dead ends: 316 [2022-01-31 20:36:03,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=708, Invalid=2832, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 20:36:03,861 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 188 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:36:03,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 72 Invalid, 869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 734 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:36:03,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-01-31 20:36:04,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 222. [2022-01-31 20:36:04,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 211 states have (on average 1.1895734597156398) internal successors, (251), 213 states have internal predecessors, (251), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 20:36:04,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 262 transitions. [2022-01-31 20:36:04,042 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 262 transitions. Word has length 50 [2022-01-31 20:36:04,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:36:04,043 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 262 transitions. [2022-01-31 20:36:04,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:36:04,043 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 262 transitions. [2022-01-31 20:36:04,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 20:36:04,043 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:36:04,043 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:36:04,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 20:36:04,044 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:36:04,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:36:04,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1297158544, now seen corresponding path program 10 times [2022-01-31 20:36:04,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:36:04,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1538672141] [2022-01-31 20:36:04,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:36:04,046 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:36:04,046 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:36:04,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:36:04,047 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:36:04,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:04,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:36:04,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:04,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:36:04,641 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:36:04,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1538672141] [2022-01-31 20:36:04,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1538672141] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:36:04,642 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:36:04,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 20:36:04,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367011839] [2022-01-31 20:36:04,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:36:04,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 20:36:04,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:36:04,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 20:36:04,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-01-31 20:36:04,643 INFO L87 Difference]: Start difference. First operand 222 states and 262 transitions. Second operand has 25 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:36:06,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:36:06,100 INFO L93 Difference]: Finished difference Result 286 states and 334 transitions. [2022-01-31 20:36:06,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 20:36:06,100 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-01-31 20:36:06,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:36:06,101 INFO L225 Difference]: With dead ends: 286 [2022-01-31 20:36:06,101 INFO L226 Difference]: Without dead ends: 284 [2022-01-31 20:36:06,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=431, Invalid=2991, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 20:36:06,102 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 150 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 1359 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:36:06,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 90 Invalid, 1479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1359 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 20:36:06,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-01-31 20:36:06,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 222. [2022-01-31 20:36:06,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 211 states have (on average 1.1943127962085307) internal successors, (252), 213 states have internal predecessors, (252), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 20:36:06,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 263 transitions. [2022-01-31 20:36:06,291 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 263 transitions. Word has length 50 [2022-01-31 20:36:06,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:36:06,291 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 263 transitions. [2022-01-31 20:36:06,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:36:06,291 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 263 transitions. [2022-01-31 20:36:06,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 20:36:06,292 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:36:06,292 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:36:06,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 20:36:06,292 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:36:06,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:36:06,292 INFO L85 PathProgramCache]: Analyzing trace with hash -787548180, now seen corresponding path program 2 times [2022-01-31 20:36:06,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:36:06,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2095806056] [2022-01-31 20:36:06,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:36:06,295 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:36:06,295 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:36:06,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:36:06,296 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:36:06,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:06,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:36:06,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:06,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 20:36:06,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:06,536 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 20:36:06,536 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:36:06,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2095806056] [2022-01-31 20:36:06,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2095806056] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:36:06,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:36:06,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 20:36:06,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081633028] [2022-01-31 20:36:06,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:36:06,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 20:36:06,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:36:06,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 20:36:06,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2022-01-31 20:36:06,538 INFO L87 Difference]: Start difference. First operand 222 states and 263 transitions. Second operand has 18 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:36:07,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:36:07,726 INFO L93 Difference]: Finished difference Result 325 states and 386 transitions. [2022-01-31 20:36:07,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 20:36:07,727 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2022-01-31 20:36:07,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:36:07,728 INFO L225 Difference]: With dead ends: 325 [2022-01-31 20:36:07,728 INFO L226 Difference]: Without dead ends: 323 [2022-01-31 20:36:07,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=317, Invalid=2233, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 20:36:07,729 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 158 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:36:07,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 105 Invalid, 1221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1089 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:36:07,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-01-31 20:36:07,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 254. [2022-01-31 20:36:07,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 239 states have (on average 1.1924686192468619) internal successors, (285), 243 states have internal predecessors, (285), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 20:36:07,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 302 transitions. [2022-01-31 20:36:07,898 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 302 transitions. Word has length 52 [2022-01-31 20:36:07,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:36:07,898 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 302 transitions. [2022-01-31 20:36:07,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:36:07,898 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 302 transitions. [2022-01-31 20:36:07,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 20:36:07,899 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:36:07,899 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:36:07,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 20:36:07,899 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:36:07,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:36:07,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1609585614, now seen corresponding path program 3 times [2022-01-31 20:36:07,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:36:07,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1970901693] [2022-01-31 20:36:07,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:36:07,901 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:36:07,901 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:36:07,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:36:07,902 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:36:07,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:08,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:36:08,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:08,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 20:36:08,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:08,380 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 20:36:08,380 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:36:08,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1970901693] [2022-01-31 20:36:08,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1970901693] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:36:08,380 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:36:08,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 20:36:08,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966459587] [2022-01-31 20:36:08,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:36:08,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 20:36:08,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:36:08,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 20:36:08,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-01-31 20:36:08,382 INFO L87 Difference]: Start difference. First operand 254 states and 302 transitions. Second operand has 25 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:36:09,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:36:09,593 INFO L93 Difference]: Finished difference Result 294 states and 348 transitions. [2022-01-31 20:36:09,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 20:36:09,593 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2022-01-31 20:36:09,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:36:09,594 INFO L225 Difference]: With dead ends: 294 [2022-01-31 20:36:09,594 INFO L226 Difference]: Without dead ends: 292 [2022-01-31 20:36:09,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=311, Invalid=2239, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 20:36:09,595 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 120 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 867 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:36:09,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 80 Invalid, 943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 867 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:36:09,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-01-31 20:36:09,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 251. [2022-01-31 20:36:09,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 236 states have (on average 1.194915254237288) internal successors, (282), 240 states have internal predecessors, (282), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 20:36:09,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 299 transitions. [2022-01-31 20:36:09,764 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 299 transitions. Word has length 52 [2022-01-31 20:36:09,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:36:09,764 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 299 transitions. [2022-01-31 20:36:09,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:36:09,764 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 299 transitions. [2022-01-31 20:36:09,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 20:36:09,765 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:36:09,765 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:36:09,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 20:36:09,765 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:36:09,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:36:09,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1574158879, now seen corresponding path program 9 times [2022-01-31 20:36:09,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:36:09,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [161763871] [2022-01-31 20:36:09,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:36:09,767 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:36:09,767 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:36:09,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:36:09,769 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:36:09,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:10,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:36:10,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:10,352 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 20:36:10,352 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:36:10,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [161763871] [2022-01-31 20:36:10,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [161763871] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:36:10,353 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:36:10,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 20:36:10,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597647651] [2022-01-31 20:36:10,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:36:10,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 20:36:10,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:36:10,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 20:36:10,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2022-01-31 20:36:10,354 INFO L87 Difference]: Start difference. First operand 251 states and 299 transitions. Second operand has 27 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:36:11,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:36:11,486 INFO L93 Difference]: Finished difference Result 340 states and 405 transitions. [2022-01-31 20:36:11,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 20:36:11,487 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 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 20:36:11,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:36:11,488 INFO L225 Difference]: With dead ends: 340 [2022-01-31 20:36:11,488 INFO L226 Difference]: Without dead ends: 338 [2022-01-31 20:36:11,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=451, Invalid=2201, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 20:36:11,489 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 188 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:36:11,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 70 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:36:11,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-01-31 20:36:11,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 286. [2022-01-31 20:36:11,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 268 states have (on average 1.1902985074626866) internal successors, (319), 274 states have internal predecessors, (319), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (10), 4 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 20:36:11,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 340 transitions. [2022-01-31 20:36:11,762 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 340 transitions. Word has length 52 [2022-01-31 20:36:11,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:36:11,762 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 340 transitions. [2022-01-31 20:36:11,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:36:11,762 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 340 transitions. [2022-01-31 20:36:11,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 20:36:11,763 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:36:11,763 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:36:11,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 20:36:11,763 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:36:11,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:36:11,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1534105639, now seen corresponding path program 10 times [2022-01-31 20:36:11,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:36:11,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523966002] [2022-01-31 20:36:11,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:36:11,765 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:36:11,765 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:36:11,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:36:11,766 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:36:11,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:12,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:36:12,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:12,386 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 20:36:12,386 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:36:12,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523966002] [2022-01-31 20:36:12,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [523966002] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:36:12,386 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:36:12,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 20:36:12,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22075107] [2022-01-31 20:36:12,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:36:12,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 20:36:12,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:36:12,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 20:36:12,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2022-01-31 20:36:12,387 INFO L87 Difference]: Start difference. First operand 286 states and 340 transitions. Second operand has 27 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:36:13,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:36:13,691 INFO L93 Difference]: Finished difference Result 370 states and 441 transitions. [2022-01-31 20:36:13,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 20:36:13,701 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 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 20:36:13,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:36:13,702 INFO L225 Difference]: With dead ends: 370 [2022-01-31 20:36:13,702 INFO L226 Difference]: Without dead ends: 368 [2022-01-31 20:36:13,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=489, Invalid=2591, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 20:36:13,708 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 201 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 981 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 1121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:36:13,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 85 Invalid, 1121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 981 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:36:13,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2022-01-31 20:36:13,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 311. [2022-01-31 20:36:13,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 291 states have (on average 1.1924398625429553) internal successors, (347), 298 states have internal predecessors, (347), 12 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (11), 4 states have call predecessors, (11), 11 states have call successors, (11) [2022-01-31 20:36:13,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 370 transitions. [2022-01-31 20:36:13,917 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 370 transitions. Word has length 52 [2022-01-31 20:36:13,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:36:13,917 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 370 transitions. [2022-01-31 20:36:13,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:36:13,917 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 370 transitions. [2022-01-31 20:36:13,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 20:36:13,918 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:36:13,918 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:36:13,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 20:36:13,918 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:36:13,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:36:13,923 INFO L85 PathProgramCache]: Analyzing trace with hash 650625165, now seen corresponding path program 4 times [2022-01-31 20:36:13,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:36:13,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [207509595] [2022-01-31 20:36:13,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:36:13,925 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:36:13,925 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:36:13,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:36:13,926 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:36:13,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:14,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:36:14,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:14,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-01-31 20:36:14,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:14,125 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 20:36:14,125 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:36:14,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [207509595] [2022-01-31 20:36:14,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [207509595] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:36:14,126 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:36:14,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 20:36:14,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623780784] [2022-01-31 20:36:14,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:36:14,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 20:36:14,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:36:14,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 20:36:14,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2022-01-31 20:36:14,127 INFO L87 Difference]: Start difference. First operand 311 states and 370 transitions. Second operand has 17 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:36:15,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:36:15,305 INFO L93 Difference]: Finished difference Result 394 states and 467 transitions. [2022-01-31 20:36:15,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 20:36:15,306 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55 [2022-01-31 20:36:15,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:36:15,307 INFO L225 Difference]: With dead ends: 394 [2022-01-31 20:36:15,307 INFO L226 Difference]: Without dead ends: 392 [2022-01-31 20:36:15,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=249, Invalid=1913, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 20:36:15,308 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 148 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 1424 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:36:15,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 114 Invalid, 1510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1424 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:36:15,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-01-31 20:36:15,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 305. [2022-01-31 20:36:15,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 285 states have (on average 1.1929824561403508) internal successors, (340), 292 states have internal predecessors, (340), 12 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (11), 4 states have call predecessors, (11), 11 states have call successors, (11) [2022-01-31 20:36:15,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 363 transitions. [2022-01-31 20:36:15,528 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 363 transitions. Word has length 55 [2022-01-31 20:36:15,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:36:15,528 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 363 transitions. [2022-01-31 20:36:15,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:36:15,529 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 363 transitions. [2022-01-31 20:36:15,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 20:36:15,530 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:36:15,530 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:36:15,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 20:36:15,530 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:36:15,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:36:15,530 INFO L85 PathProgramCache]: Analyzing trace with hash 555461839, now seen corresponding path program 3 times [2022-01-31 20:36:15,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:36:15,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [218104467] [2022-01-31 20:36:15,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:36:15,532 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:36:15,532 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:36:15,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:36:15,533 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:36:15,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:16,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:36:16,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:16,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-01-31 20:36:16,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:16,308 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 20:36:16,308 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:36:16,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [218104467] [2022-01-31 20:36:16,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [218104467] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:36:16,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:36:16,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 20:36:16,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516748528] [2022-01-31 20:36:16,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:36:16,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 20:36:16,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:36:16,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 20:36:16,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2022-01-31 20:36:16,310 INFO L87 Difference]: Start difference. First operand 305 states and 363 transitions. Second operand has 30 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:36:18,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:36:18,126 INFO L93 Difference]: Finished difference Result 388 states and 459 transitions. [2022-01-31 20:36:18,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 20:36:18,126 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55 [2022-01-31 20:36:18,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:36:18,128 INFO L225 Difference]: With dead ends: 388 [2022-01-31 20:36:18,128 INFO L226 Difference]: Without dead ends: 386 [2022-01-31 20:36:18,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1530 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=712, Invalid=4400, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 20:36:18,129 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 170 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1102 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 1102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:36:18,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 65 Invalid, 1262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 1102 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:36:18,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-01-31 20:36:18,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 332. [2022-01-31 20:36:18,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 312 states have (on average 1.1923076923076923) internal successors, (372), 319 states have internal predecessors, (372), 12 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (11), 4 states have call predecessors, (11), 11 states have call successors, (11) [2022-01-31 20:36:18,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 395 transitions. [2022-01-31 20:36:18,444 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 395 transitions. Word has length 55 [2022-01-31 20:36:18,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:36:18,444 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 395 transitions. [2022-01-31 20:36:18,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:36:18,445 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 395 transitions. [2022-01-31 20:36:18,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-31 20:36:18,446 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:36:18,446 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:36:18,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 20:36:18,446 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:36:18,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:36:18,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1147005369, now seen corresponding path program 5 times [2022-01-31 20:36:18,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:36:18,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [561463779] [2022-01-31 20:36:18,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:36:18,448 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:36:18,449 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:36:18,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:36:18,450 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:36:18,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:18,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:36:18,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:18,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-31 20:36:18,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:18,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-31 20:36:18,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:18,827 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 20:36:18,827 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:36:18,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [561463779] [2022-01-31 20:36:18,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [561463779] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:36:18,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:36:18,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 20:36:18,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193981072] [2022-01-31 20:36:18,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:36:18,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 20:36:18,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:36:18,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 20:36:18,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-01-31 20:36:18,828 INFO L87 Difference]: Start difference. First operand 332 states and 395 transitions. Second operand has 19 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:36:19,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:36:19,744 INFO L93 Difference]: Finished difference Result 390 states and 462 transitions. [2022-01-31 20:36:19,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 20:36:19,744 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 57 [2022-01-31 20:36:19,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:36:19,746 INFO L225 Difference]: With dead ends: 390 [2022-01-31 20:36:19,746 INFO L226 Difference]: Without dead ends: 388 [2022-01-31 20:36:19,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=1255, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 20:36:19,747 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 154 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:36:19,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 93 Invalid, 971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 894 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:36:19,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-01-31 20:36:20,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 366. [2022-01-31 20:36:20,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 339 states have (on average 1.176991150442478) internal successors, (399), 349 states have internal predecessors, (399), 18 states have call successors, (18), 9 states have call predecessors, (18), 8 states have return successors, (17), 7 states have call predecessors, (17), 17 states have call successors, (17) [2022-01-31 20:36:20,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 434 transitions. [2022-01-31 20:36:20,030 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 434 transitions. Word has length 57 [2022-01-31 20:36:20,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:36:20,030 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 434 transitions. [2022-01-31 20:36:20,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:36:20,030 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 434 transitions. [2022-01-31 20:36:20,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 20:36:20,031 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:36:20,031 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:36:20,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 20:36:20,032 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:36:20,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:36:20,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1946369156, now seen corresponding path program 11 times [2022-01-31 20:36:20,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:36:20,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821085883] [2022-01-31 20:36:20,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:36:20,034 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:36:20,034 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:36:20,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:36:20,035 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:36:20,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:20,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:36:20,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:20,659 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 20:36:20,659 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:36:20,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821085883] [2022-01-31 20:36:20,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [821085883] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:36:20,660 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:36:20,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 20:36:20,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645098973] [2022-01-31 20:36:20,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:36:20,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 20:36:20,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:36:20,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 20:36:20,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2022-01-31 20:36:20,661 INFO L87 Difference]: Start difference. First operand 366 states and 434 transitions. Second operand has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:36:22,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:36:22,394 INFO L93 Difference]: Finished difference Result 498 states and 595 transitions. [2022-01-31 20:36:22,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 20:36:22,394 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-01-31 20:36:22,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:36:22,396 INFO L225 Difference]: With dead ends: 498 [2022-01-31 20:36:22,396 INFO L226 Difference]: Without dead ends: 496 [2022-01-31 20:36:22,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1086 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=577, Invalid=3455, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 20:36:22,399 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 200 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1497 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:36:22,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 105 Invalid, 1644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1497 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 20:36:22,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2022-01-31 20:36:22,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 401. [2022-01-31 20:36:22,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 372 states have (on average 1.185483870967742) internal successors, (441), 383 states have internal predecessors, (441), 19 states have call successors, (19), 10 states have call predecessors, (19), 9 states have return successors, (18), 7 states have call predecessors, (18), 18 states have call successors, (18) [2022-01-31 20:36:22,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 478 transitions. [2022-01-31 20:36:22,818 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 478 transitions. Word has length 55 [2022-01-31 20:36:22,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:36:22,818 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 478 transitions. [2022-01-31 20:36:22,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:36:22,818 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 478 transitions. [2022-01-31 20:36:22,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 20:36:22,819 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:36:22,819 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:36:22,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 20:36:22,819 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:36:22,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:36:22,820 INFO L85 PathProgramCache]: Analyzing trace with hash -426979644, now seen corresponding path program 12 times [2022-01-31 20:36:22,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:36:22,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [926808118] [2022-01-31 20:36:22,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:36:22,821 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:36:22,821 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:36:22,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:36:22,822 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:36:22,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:23,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:36:23,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:23,348 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 20:36:23,348 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:36:23,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [926808118] [2022-01-31 20:36:23,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [926808118] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:36:23,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:36:23,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 20:36:23,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476851049] [2022-01-31 20:36:23,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:36:23,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 20:36:23,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:36:23,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 20:36:23,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-01-31 20:36:23,349 INFO L87 Difference]: Start difference. First operand 401 states and 478 transitions. Second operand has 25 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:36:25,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:36:25,270 INFO L93 Difference]: Finished difference Result 510 states and 610 transitions. [2022-01-31 20:36:25,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 20:36:25,274 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-01-31 20:36:25,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:36:25,275 INFO L225 Difference]: With dead ends: 510 [2022-01-31 20:36:25,275 INFO L226 Difference]: Without dead ends: 508 [2022-01-31 20:36:25,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=572, Invalid=3460, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 20:36:25,276 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 255 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1497 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 1656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 1497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:36:25,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 68 Invalid, 1656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 1497 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 20:36:25,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2022-01-31 20:36:25,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 410. [2022-01-31 20:36:25,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 381 states have (on average 1.188976377952756) internal successors, (453), 392 states have internal predecessors, (453), 19 states have call successors, (19), 10 states have call predecessors, (19), 9 states have return successors, (18), 7 states have call predecessors, (18), 18 states have call successors, (18) [2022-01-31 20:36:25,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 490 transitions. [2022-01-31 20:36:25,577 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 490 transitions. Word has length 55 [2022-01-31 20:36:25,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:36:25,578 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 490 transitions. [2022-01-31 20:36:25,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:36:25,578 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 490 transitions. [2022-01-31 20:36:25,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 20:36:25,580 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:36:25,581 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:36:25,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 20:36:25,581 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:36:25,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:36:25,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1046366456, now seen corresponding path program 13 times [2022-01-31 20:36:25,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:36:25,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [560841527] [2022-01-31 20:36:25,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:36:25,583 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:36:25,583 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:36:25,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:36:25,585 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:36:25,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:26,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:36:26,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:26,207 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 20:36:26,207 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:36:26,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [560841527] [2022-01-31 20:36:26,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [560841527] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:36:26,207 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:36:26,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 20:36:26,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170041345] [2022-01-31 20:36:26,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:36:26,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 20:36:26,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:36:26,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 20:36:26,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2022-01-31 20:36:26,208 INFO L87 Difference]: Start difference. First operand 410 states and 490 transitions. Second operand has 26 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:36:27,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:36:27,818 INFO L93 Difference]: Finished difference Result 487 states and 582 transitions. [2022-01-31 20:36:27,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 20:36:27,818 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-01-31 20:36:27,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:36:27,820 INFO L225 Difference]: With dead ends: 487 [2022-01-31 20:36:27,820 INFO L226 Difference]: Without dead ends: 485 [2022-01-31 20:36:27,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 910 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=485, Invalid=2937, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 20:36:27,820 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 153 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1129 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 1254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:36:27,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 72 Invalid, 1254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1129 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:36:27,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-01-31 20:36:28,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 444. [2022-01-31 20:36:28,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 412 states have (on average 1.1893203883495145) internal successors, (490), 425 states have internal predecessors, (490), 21 states have call successors, (21), 11 states have call predecessors, (21), 10 states have return successors, (20), 7 states have call predecessors, (20), 20 states have call successors, (20) [2022-01-31 20:36:28,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 531 transitions. [2022-01-31 20:36:28,185 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 531 transitions. Word has length 55 [2022-01-31 20:36:28,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:36:28,185 INFO L470 AbstractCegarLoop]: Abstraction has 444 states and 531 transitions. [2022-01-31 20:36:28,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:36:28,185 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 531 transitions. [2022-01-31 20:36:28,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 20:36:28,186 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:36:28,187 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:36:28,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 20:36:28,187 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:36:28,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:36:28,187 INFO L85 PathProgramCache]: Analyzing trace with hash -140336322, now seen corresponding path program 14 times [2022-01-31 20:36:28,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:36:28,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451815154] [2022-01-31 20:36:28,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:36:28,189 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:36:28,189 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:36:28,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:36:28,190 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:36:28,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:28,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:36:28,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:28,894 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 20:36:28,894 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:36:28,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1451815154] [2022-01-31 20:36:28,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1451815154] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:36:28,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:36:28,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 20:36:28,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466113031] [2022-01-31 20:36:28,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:36:28,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 20:36:28,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:36:28,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 20:36:28,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2022-01-31 20:36:28,895 INFO L87 Difference]: Start difference. First operand 444 states and 531 transitions. Second operand has 29 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:36:30,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:36:30,984 INFO L93 Difference]: Finished difference Result 548 states and 655 transitions. [2022-01-31 20:36:30,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 20:36:30,985 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-01-31 20:36:30,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:36:30,987 INFO L225 Difference]: With dead ends: 548 [2022-01-31 20:36:30,987 INFO L226 Difference]: Without dead ends: 546 [2022-01-31 20:36:30,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1172 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=585, Invalid=3705, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 20:36:30,988 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 179 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 1939 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 2074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 20:36:30,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 126 Invalid, 2074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 1939 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 20:36:30,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2022-01-31 20:36:31,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 441. [2022-01-31 20:36:31,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 409 states have (on average 1.1882640586797066) internal successors, (486), 422 states have internal predecessors, (486), 21 states have call successors, (21), 11 states have call predecessors, (21), 10 states have return successors, (20), 7 states have call predecessors, (20), 20 states have call successors, (20) [2022-01-31 20:36:31,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 527 transitions. [2022-01-31 20:36:31,325 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 527 transitions. Word has length 55 [2022-01-31 20:36:31,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:36:31,325 INFO L470 AbstractCegarLoop]: Abstraction has 441 states and 527 transitions. [2022-01-31 20:36:31,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:36:31,325 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 527 transitions. [2022-01-31 20:36:31,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 20:36:31,326 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:36:31,327 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:36:31,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 20:36:31,327 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:36:31,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:36:31,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1285024718, now seen corresponding path program 4 times [2022-01-31 20:36:31,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:36:31,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010510040] [2022-01-31 20:36:31,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:36:31,329 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:36:31,329 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:36:31,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:36:31,330 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:36:31,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:32,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:36:32,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:32,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 20:36:32,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:32,276 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 20:36:32,276 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:36:32,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010510040] [2022-01-31 20:36:32,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1010510040] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:36:32,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:36:32,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 20:36:32,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839897923] [2022-01-31 20:36:32,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:36:32,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 20:36:32,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:36:32,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 20:36:32,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2022-01-31 20:36:32,278 INFO L87 Difference]: Start difference. First operand 441 states and 527 transitions. Second operand has 31 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:36:35,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:36:35,077 INFO L93 Difference]: Finished difference Result 540 states and 645 transitions. [2022-01-31 20:36:35,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 20:36:35,078 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 58 [2022-01-31 20:36:35,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:36:35,079 INFO L225 Difference]: With dead ends: 540 [2022-01-31 20:36:35,079 INFO L226 Difference]: Without dead ends: 538 [2022-01-31 20:36:35,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2400 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1045, Invalid=6611, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 20:36:35,081 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 228 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1887 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 2117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 1887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:36:35,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 118 Invalid, 2117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 1887 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 20:36:35,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-01-31 20:36:35,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 465. [2022-01-31 20:36:35,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 432 states have (on average 1.1875) internal successors, (513), 446 states have internal predecessors, (513), 22 states have call successors, (22), 11 states have call predecessors, (22), 10 states have return successors, (21), 7 states have call predecessors, (21), 21 states have call successors, (21) [2022-01-31 20:36:35,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 556 transitions. [2022-01-31 20:36:35,445 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 556 transitions. Word has length 58 [2022-01-31 20:36:35,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:36:35,445 INFO L470 AbstractCegarLoop]: Abstraction has 465 states and 556 transitions. [2022-01-31 20:36:35,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:36:35,445 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 556 transitions. [2022-01-31 20:36:35,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 20:36:35,446 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:36:35,447 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:36:35,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 20:36:35,447 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:36:35,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:36:35,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1642798748, now seen corresponding path program 5 times [2022-01-31 20:36:35,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:36:35,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [320249889] [2022-01-31 20:36:35,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:36:35,449 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:36:35,449 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:36:35,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:36:35,450 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:36:35,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:36,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:36:36,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:36,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 20:36:36,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:36,251 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 20:36:36,251 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:36:36,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [320249889] [2022-01-31 20:36:36,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [320249889] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:36:36,251 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:36:36,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 20:36:36,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506596664] [2022-01-31 20:36:36,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:36:36,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 20:36:36,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:36:36,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 20:36:36,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2022-01-31 20:36:36,253 INFO L87 Difference]: Start difference. First operand 465 states and 556 transitions. Second operand has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:36:38,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:36:38,123 INFO L93 Difference]: Finished difference Result 565 states and 678 transitions. [2022-01-31 20:36:38,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 20:36:38,123 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 58 [2022-01-31 20:36:38,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:36:38,125 INFO L225 Difference]: With dead ends: 565 [2022-01-31 20:36:38,125 INFO L226 Difference]: Without dead ends: 563 [2022-01-31 20:36:38,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 996 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=459, Invalid=3201, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 20:36:38,125 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 165 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1407 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 1527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:36:38,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 109 Invalid, 1527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1407 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 20:36:38,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-01-31 20:36:38,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 449. [2022-01-31 20:36:38,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 418 states have (on average 1.19377990430622) internal successors, (499), 431 states have internal predecessors, (499), 20 states have call successors, (20), 11 states have call predecessors, (20), 10 states have return successors, (19), 6 states have call predecessors, (19), 19 states have call successors, (19) [2022-01-31 20:36:38,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 538 transitions. [2022-01-31 20:36:38,558 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 538 transitions. Word has length 58 [2022-01-31 20:36:38,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:36:38,558 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 538 transitions. [2022-01-31 20:36:38,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:36:38,558 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 538 transitions. [2022-01-31 20:36:38,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 20:36:38,559 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:36:38,559 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:36:38,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 20:36:38,560 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:36:38,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:36:38,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1797092794, now seen corresponding path program 5 times [2022-01-31 20:36:38,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:36:38,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1637541207] [2022-01-31 20:36:38,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:36:38,562 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:36:38,562 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:36:38,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:36:38,563 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:36:38,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:38,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:36:38,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:38,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 20:36:38,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:38,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 20:36:38,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:38,915 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 20:36:38,916 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:36:38,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1637541207] [2022-01-31 20:36:38,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1637541207] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:36:38,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:36:38,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 20:36:38,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970445939] [2022-01-31 20:36:38,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:36:38,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 20:36:38,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:36:38,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 20:36:38,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-01-31 20:36:38,917 INFO L87 Difference]: Start difference. First operand 449 states and 538 transitions. Second operand has 18 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:36:40,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:36:40,041 INFO L93 Difference]: Finished difference Result 501 states and 600 transitions. [2022-01-31 20:36:40,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 20:36:40,041 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 60 [2022-01-31 20:36:40,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:36:40,043 INFO L225 Difference]: With dead ends: 501 [2022-01-31 20:36:40,043 INFO L226 Difference]: Without dead ends: 499 [2022-01-31 20:36:40,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=192, Invalid=1140, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 20:36:40,043 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 168 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 978 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:36:40,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 81 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 978 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:36:40,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-01-31 20:36:40,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 449. [2022-01-31 20:36:40,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 418 states have (on average 1.1961722488038278) internal successors, (500), 431 states have internal predecessors, (500), 20 states have call successors, (20), 11 states have call predecessors, (20), 10 states have return successors, (19), 6 states have call predecessors, (19), 19 states have call successors, (19) [2022-01-31 20:36:40,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 539 transitions. [2022-01-31 20:36:40,401 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 539 transitions. Word has length 60 [2022-01-31 20:36:40,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:36:40,401 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 539 transitions. [2022-01-31 20:36:40,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:36:40,401 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 539 transitions. [2022-01-31 20:36:40,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 20:36:40,403 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:36:40,404 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:36:40,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 20:36:40,404 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:36:40,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:36:40,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1104308479, now seen corresponding path program 15 times [2022-01-31 20:36:40,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:36:40,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2051506109] [2022-01-31 20:36:40,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:36:40,406 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:36:40,406 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:36:40,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:36:40,408 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:36:40,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:40,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:36:40,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:40,693 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 20:36:40,693 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:36:40,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2051506109] [2022-01-31 20:36:40,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2051506109] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:36:40,693 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:36:40,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 20:36:40,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264238743] [2022-01-31 20:36:40,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:36:40,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 20:36:40,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:36:40,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 20:36:40,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-01-31 20:36:40,694 INFO L87 Difference]: Start difference. First operand 449 states and 539 transitions. Second operand has 21 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:36:42,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:36:42,761 INFO L93 Difference]: Finished difference Result 662 states and 809 transitions. [2022-01-31 20:36:42,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 20:36:42,762 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-01-31 20:36:42,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:36:42,764 INFO L225 Difference]: With dead ends: 662 [2022-01-31 20:36:42,764 INFO L226 Difference]: Without dead ends: 660 [2022-01-31 20:36:42,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2026 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1472, Invalid=4690, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 20:36:42,765 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 301 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:36:42,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 46 Invalid, 946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:36:42,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2022-01-31 20:36:43,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 488. [2022-01-31 20:36:43,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 456 states have (on average 1.206140350877193) internal successors, (550), 469 states have internal predecessors, (550), 20 states have call successors, (20), 12 states have call predecessors, (20), 11 states have return successors, (19), 6 states have call predecessors, (19), 19 states have call successors, (19) [2022-01-31 20:36:43,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 589 transitions. [2022-01-31 20:36:43,146 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 589 transitions. Word has length 58 [2022-01-31 20:36:43,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:36:43,147 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 589 transitions. [2022-01-31 20:36:43,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:36:43,147 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 589 transitions. [2022-01-31 20:36:43,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 20:36:43,148 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:36:43,148 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:36:43,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 20:36:43,148 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:36:43,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:36:43,149 INFO L85 PathProgramCache]: Analyzing trace with hash -403243901, now seen corresponding path program 11 times [2022-01-31 20:36:43,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:36:43,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [827235390] [2022-01-31 20:36:43,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:36:43,150 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:36:43,150 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:36:43,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:36:43,151 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:36:43,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:43,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:36:43,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:43,228 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 20:36:43,228 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:36:43,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [827235390] [2022-01-31 20:36:43,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [827235390] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:36:43,228 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:36:43,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 20:36:43,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934128058] [2022-01-31 20:36:43,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:36:43,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 20:36:43,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:36:43,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 20:36:43,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-01-31 20:36:43,229 INFO L87 Difference]: Start difference. First operand 488 states and 589 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:36:44,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:36:44,129 INFO L93 Difference]: Finished difference Result 616 states and 753 transitions. [2022-01-31 20:36:44,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 20:36:44,129 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-01-31 20:36:44,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:36:44,131 INFO L225 Difference]: With dead ends: 616 [2022-01-31 20:36:44,131 INFO L226 Difference]: Without dead ends: 590 [2022-01-31 20:36:44,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=349, Invalid=911, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 20:36:44,131 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 131 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:36:44,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 70 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:36:44,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2022-01-31 20:36:44,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 494. [2022-01-31 20:36:44,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 462 states have (on average 1.2077922077922079) internal successors, (558), 475 states have internal predecessors, (558), 20 states have call successors, (20), 12 states have call predecessors, (20), 11 states have return successors, (19), 6 states have call predecessors, (19), 19 states have call successors, (19) [2022-01-31 20:36:44,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 597 transitions. [2022-01-31 20:36:44,600 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 597 transitions. Word has length 58 [2022-01-31 20:36:44,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:36:44,601 INFO L470 AbstractCegarLoop]: Abstraction has 494 states and 597 transitions. [2022-01-31 20:36:44,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:36:44,601 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 597 transitions. [2022-01-31 20:36:44,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 20:36:44,602 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:36:44,602 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:36:44,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 20:36:44,603 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:36:44,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:36:44,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1786782527, now seen corresponding path program 16 times [2022-01-31 20:36:44,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:36:44,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [497071683] [2022-01-31 20:36:44,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:36:44,605 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:36:44,605 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:36:44,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:36:44,607 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:36:44,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:45,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:36:45,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:45,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:36:45,508 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:36:45,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [497071683] [2022-01-31 20:36:45,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [497071683] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:36:45,508 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:36:45,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 20:36:45,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789984291] [2022-01-31 20:36:45,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:36:45,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 20:36:45,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:36:45,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 20:36:45,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2022-01-31 20:36:45,509 INFO L87 Difference]: Start difference. First operand 494 states and 597 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:36:47,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:36:47,407 INFO L93 Difference]: Finished difference Result 584 states and 701 transitions. [2022-01-31 20:36:47,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 20:36:47,407 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-01-31 20:36:47,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:36:47,409 INFO L225 Difference]: With dead ends: 584 [2022-01-31 20:36:47,409 INFO L226 Difference]: Without dead ends: 582 [2022-01-31 20:36:47,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 4 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1258 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=461, Invalid=3829, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 20:36:47,409 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 217 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 2112 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 2236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 2112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 20:36:47,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 108 Invalid, 2236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 2112 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 20:36:47,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2022-01-31 20:36:47,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 500. [2022-01-31 20:36:47,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 468 states have (on average 1.2094017094017093) internal successors, (566), 481 states have internal predecessors, (566), 20 states have call successors, (20), 12 states have call predecessors, (20), 11 states have return successors, (19), 6 states have call predecessors, (19), 19 states have call successors, (19) [2022-01-31 20:36:47,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 605 transitions. [2022-01-31 20:36:47,791 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 605 transitions. Word has length 58 [2022-01-31 20:36:47,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:36:47,791 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 605 transitions. [2022-01-31 20:36:47,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:36:47,791 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 605 transitions. [2022-01-31 20:36:47,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 20:36:47,792 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:36:47,792 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:36:47,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 20:36:47,792 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:36:47,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:36:47,793 INFO L85 PathProgramCache]: Analyzing trace with hash -266865911, now seen corresponding path program 12 times [2022-01-31 20:36:47,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:36:47,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [48530423] [2022-01-31 20:36:47,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:36:47,795 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:36:47,795 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:36:47,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:36:47,797 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:36:47,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:48,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:36:48,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:48,326 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 20:36:48,326 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:36:48,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [48530423] [2022-01-31 20:36:48,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [48530423] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:36:48,326 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:36:48,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 20:36:48,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111489676] [2022-01-31 20:36:48,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:36:48,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 20:36:48,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:36:48,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 20:36:48,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-01-31 20:36:48,327 INFO L87 Difference]: Start difference. First operand 500 states and 605 transitions. Second operand has 25 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:36:51,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:36:51,147 INFO L93 Difference]: Finished difference Result 644 states and 774 transitions. [2022-01-31 20:36:51,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 20:36:51,148 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-01-31 20:36:51,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:36:51,153 INFO L225 Difference]: With dead ends: 644 [2022-01-31 20:36:51,154 INFO L226 Difference]: Without dead ends: 642 [2022-01-31 20:36:51,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 4 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=662, Invalid=4888, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 20:36:51,156 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 360 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 2416 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 2664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 2416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:36:51,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 112 Invalid, 2664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 2416 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 20:36:51,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2022-01-31 20:36:51,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 477. [2022-01-31 20:36:51,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 447 states have (on average 1.2125279642058167) internal successors, (542), 459 states have internal predecessors, (542), 18 states have call successors, (18), 12 states have call predecessors, (18), 11 states have return successors, (17), 5 states have call predecessors, (17), 17 states have call successors, (17) [2022-01-31 20:36:51,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 577 transitions. [2022-01-31 20:36:51,539 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 577 transitions. Word has length 58 [2022-01-31 20:36:51,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:36:51,539 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 577 transitions. [2022-01-31 20:36:51,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:36:51,539 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 577 transitions. [2022-01-31 20:36:51,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 20:36:51,540 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:36:51,540 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:36:51,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 20:36:51,541 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:36:51,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:36:51,541 INFO L85 PathProgramCache]: Analyzing trace with hash 396084749, now seen corresponding path program 17 times [2022-01-31 20:36:51,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:36:51,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1483909791] [2022-01-31 20:36:51,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:36:51,542 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:36:51,542 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:36:51,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:36:51,544 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:36:51,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:52,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:36:52,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:52,215 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 20:36:52,215 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:36:52,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1483909791] [2022-01-31 20:36:52,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1483909791] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:36:52,215 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:36:52,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 20:36:52,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754311513] [2022-01-31 20:36:52,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:36:52,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 20:36:52,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:36:52,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 20:36:52,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2022-01-31 20:36:52,216 INFO L87 Difference]: Start difference. First operand 477 states and 577 transitions. Second operand has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:36:54,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:36:54,371 INFO L93 Difference]: Finished difference Result 612 states and 738 transitions. [2022-01-31 20:36:54,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 20:36:54,371 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-01-31 20:36:54,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:36:54,373 INFO L225 Difference]: With dead ends: 612 [2022-01-31 20:36:54,373 INFO L226 Difference]: Without dead ends: 610 [2022-01-31 20:36:54,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1301 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=606, Invalid=4086, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 20:36:54,374 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 207 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1937 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 2098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 1937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 20:36:54,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 80 Invalid, 2098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 1937 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 20:36:54,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2022-01-31 20:36:54,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 477. [2022-01-31 20:36:54,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 447 states have (on average 1.2125279642058167) internal successors, (542), 459 states have internal predecessors, (542), 18 states have call successors, (18), 12 states have call predecessors, (18), 11 states have return successors, (17), 5 states have call predecessors, (17), 17 states have call successors, (17) [2022-01-31 20:36:54,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 577 transitions. [2022-01-31 20:36:54,746 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 577 transitions. Word has length 58 [2022-01-31 20:36:54,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:36:54,746 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 577 transitions. [2022-01-31 20:36:54,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:36:54,746 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 577 transitions. [2022-01-31 20:36:54,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 20:36:54,747 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:36:54,747 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:36:54,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 20:36:54,747 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:36:54,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:36:54,748 INFO L85 PathProgramCache]: Analyzing trace with hash -441878337, now seen corresponding path program 13 times [2022-01-31 20:36:54,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:36:54,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [105176330] [2022-01-31 20:36:54,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:36:54,749 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:36:54,749 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:36:54,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:36:54,750 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:36:54,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:55,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:36:55,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:55,440 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 20:36:55,441 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:36:55,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [105176330] [2022-01-31 20:36:55,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [105176330] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:36:55,441 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:36:55,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 20:36:55,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252723087] [2022-01-31 20:36:55,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:36:55,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 20:36:55,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:36:55,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 20:36:55,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2022-01-31 20:36:55,442 INFO L87 Difference]: Start difference. First operand 477 states and 577 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:36:57,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:36:57,556 INFO L93 Difference]: Finished difference Result 602 states and 724 transitions. [2022-01-31 20:36:57,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 20:36:57,557 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-01-31 20:36:57,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:36:57,559 INFO L225 Difference]: With dead ends: 602 [2022-01-31 20:36:57,559 INFO L226 Difference]: Without dead ends: 600 [2022-01-31 20:36:57,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1226 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=540, Invalid=4152, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 20:36:57,560 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 214 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 1663 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 1786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 20:36:57,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 94 Invalid, 1786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1663 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 20:36:57,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2022-01-31 20:36:57,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 483. [2022-01-31 20:36:57,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 453 states have (on average 1.2119205298013245) internal successors, (549), 465 states have internal predecessors, (549), 18 states have call successors, (18), 12 states have call predecessors, (18), 11 states have return successors, (17), 5 states have call predecessors, (17), 17 states have call successors, (17) [2022-01-31 20:36:57,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 584 transitions. [2022-01-31 20:36:57,945 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 584 transitions. Word has length 58 [2022-01-31 20:36:57,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:36:57,945 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 584 transitions. [2022-01-31 20:36:57,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:36:57,945 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 584 transitions. [2022-01-31 20:36:57,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 20:36:57,946 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:36:57,946 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:36:57,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 20:36:57,946 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:36:57,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:36:57,946 INFO L85 PathProgramCache]: Analyzing trace with hash 2022038101, now seen corresponding path program 14 times [2022-01-31 20:36:57,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:36:57,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1581085911] [2022-01-31 20:36:57,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:36:57,947 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:36:57,947 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:36:57,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:36:57,949 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:36:57,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:58,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:36:58,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:58,711 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 20:36:58,711 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:36:58,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1581085911] [2022-01-31 20:36:58,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1581085911] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:36:58,711 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:36:58,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 20:36:58,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996406740] [2022-01-31 20:36:58,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:36:58,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 20:36:58,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:36:58,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 20:36:58,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2022-01-31 20:36:58,712 INFO L87 Difference]: Start difference. First operand 483 states and 584 transitions. Second operand has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:37:01,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:37:01,155 INFO L93 Difference]: Finished difference Result 640 states and 773 transitions. [2022-01-31 20:37:01,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 20:37:01,156 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-01-31 20:37:01,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:37:01,158 INFO L225 Difference]: With dead ends: 640 [2022-01-31 20:37:01,158 INFO L226 Difference]: Without dead ends: 638 [2022-01-31 20:37:01,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1619 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=641, Invalid=4761, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 20:37:01,159 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 222 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 2069 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 2221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 2069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:37:01,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 112 Invalid, 2221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 2069 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 20:37:01,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2022-01-31 20:37:01,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 483. [2022-01-31 20:37:01,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 453 states have (on average 1.2119205298013245) internal successors, (549), 465 states have internal predecessors, (549), 18 states have call successors, (18), 12 states have call predecessors, (18), 11 states have return successors, (17), 5 states have call predecessors, (17), 17 states have call successors, (17) [2022-01-31 20:37:01,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 584 transitions. [2022-01-31 20:37:01,544 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 584 transitions. Word has length 58 [2022-01-31 20:37:01,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:37:01,544 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 584 transitions. [2022-01-31 20:37:01,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:37:01,544 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 584 transitions. [2022-01-31 20:37:01,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 20:37:01,546 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:37:01,547 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:37:01,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 20:37:01,547 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:37:01,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:37:01,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1349061435, now seen corresponding path program 6 times [2022-01-31 20:37:01,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:37:01,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [606055904] [2022-01-31 20:37:01,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:37:01,550 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:37:01,550 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:37:01,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:37:01,552 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:37:01,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:37:01,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:37:01,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:37:01,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 20:37:01,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:37:01,978 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 20:37:01,978 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:37:01,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [606055904] [2022-01-31 20:37:01,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [606055904] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:37:01,978 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:37:01,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 20:37:01,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378240903] [2022-01-31 20:37:01,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:37:01,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 20:37:01,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:37:01,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 20:37:01,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-01-31 20:37:01,979 INFO L87 Difference]: Start difference. First operand 483 states and 584 transitions. Second operand has 23 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:37:03,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:37:03,604 INFO L93 Difference]: Finished difference Result 588 states and 710 transitions. [2022-01-31 20:37:03,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 20:37:03,605 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 60 [2022-01-31 20:37:03,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:37:03,606 INFO L225 Difference]: With dead ends: 588 [2022-01-31 20:37:03,606 INFO L226 Difference]: Without dead ends: 586 [2022-01-31 20:37:03,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=355, Invalid=2401, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 20:37:03,607 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 144 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1296 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 1401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:37:03,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 108 Invalid, 1401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1296 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 20:37:03,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2022-01-31 20:37:04,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 520. [2022-01-31 20:37:04,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 482 states have (on average 1.2033195020746887) internal successors, (580), 498 states have internal predecessors, (580), 24 states have call successors, (24), 14 states have call predecessors, (24), 13 states have return successors, (23), 7 states have call predecessors, (23), 23 states have call successors, (23) [2022-01-31 20:37:04,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 627 transitions. [2022-01-31 20:37:04,041 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 627 transitions. Word has length 60 [2022-01-31 20:37:04,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:37:04,042 INFO L470 AbstractCegarLoop]: Abstraction has 520 states and 627 transitions. [2022-01-31 20:37:04,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:37:04,042 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 627 transitions. [2022-01-31 20:37:04,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 20:37:04,042 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:37:04,043 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:37:04,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 20:37:04,043 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:37:04,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:37:04,043 INFO L85 PathProgramCache]: Analyzing trace with hash 527024001, now seen corresponding path program 7 times [2022-01-31 20:37:04,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:37:04,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566228900] [2022-01-31 20:37:04,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:37:04,044 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:37:04,044 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:37:04,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:37:04,045 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:37:04,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:37:04,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:37:04,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:37:04,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 20:37:04,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:37:04,377 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 20:37:04,377 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:37:04,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566228900] [2022-01-31 20:37:04,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [566228900] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:37:04,378 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:37:04,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 20:37:04,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047731338] [2022-01-31 20:37:04,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:37:04,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 20:37:04,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:37:04,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 20:37:04,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2022-01-31 20:37:04,379 INFO L87 Difference]: Start difference. First operand 520 states and 627 transitions. Second operand has 21 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:37:05,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:37:05,952 INFO L93 Difference]: Finished difference Result 601 states and 725 transitions. [2022-01-31 20:37:05,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 20:37:05,953 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 60 [2022-01-31 20:37:05,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:37:05,954 INFO L225 Difference]: With dead ends: 601 [2022-01-31 20:37:05,954 INFO L226 Difference]: Without dead ends: 599 [2022-01-31 20:37:05,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=257, Invalid=1999, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 20:37:05,955 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 173 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 1498 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 1611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:37:05,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 120 Invalid, 1611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1498 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 20:37:05,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-01-31 20:37:06,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 534. [2022-01-31 20:37:06,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 496 states have (on average 1.2076612903225807) internal successors, (599), 512 states have internal predecessors, (599), 24 states have call successors, (24), 14 states have call predecessors, (24), 13 states have return successors, (23), 7 states have call predecessors, (23), 23 states have call successors, (23) [2022-01-31 20:37:06,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 646 transitions. [2022-01-31 20:37:06,423 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 646 transitions. Word has length 60 [2022-01-31 20:37:06,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:37:06,423 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 646 transitions. [2022-01-31 20:37:06,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:37:06,423 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 646 transitions. [2022-01-31 20:37:06,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 20:37:06,424 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:37:06,424 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:37:06,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 20:37:06,424 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:37:06,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:37:06,424 INFO L85 PathProgramCache]: Analyzing trace with hash 117942087, now seen corresponding path program 8 times [2022-01-31 20:37:06,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:37:06,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [370882852] [2022-01-31 20:37:06,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:37:06,425 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:37:06,425 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:37:06,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:37:06,427 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:37:06,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:37:06,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:37:06,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:37:06,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 20:37:06,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:37:06,914 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 20:37:06,914 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:37:06,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [370882852] [2022-01-31 20:37:06,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [370882852] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:37:06,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:37:06,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 20:37:06,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571389660] [2022-01-31 20:37:06,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:37:06,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 20:37:06,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:37:06,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 20:37:06,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2022-01-31 20:37:06,915 INFO L87 Difference]: Start difference. First operand 534 states and 646 transitions. Second operand has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:37:08,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:37:08,841 INFO L93 Difference]: Finished difference Result 613 states and 736 transitions. [2022-01-31 20:37:08,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 20:37:08,842 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 60 [2022-01-31 20:37:08,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:37:08,844 INFO L225 Difference]: With dead ends: 613 [2022-01-31 20:37:08,844 INFO L226 Difference]: Without dead ends: 611 [2022-01-31 20:37:08,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=432, Invalid=3600, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 20:37:08,845 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 225 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1582 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 1721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 1582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 20:37:08,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 111 Invalid, 1721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 1582 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 20:37:08,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-01-31 20:37:09,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 527. [2022-01-31 20:37:09,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 492 states have (on average 1.2134146341463414) internal successors, (597), 506 states have internal predecessors, (597), 22 states have call successors, (22), 13 states have call predecessors, (22), 12 states have return successors, (21), 7 states have call predecessors, (21), 21 states have call successors, (21) [2022-01-31 20:37:09,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 640 transitions. [2022-01-31 20:37:09,366 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 640 transitions. Word has length 60 [2022-01-31 20:37:09,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:37:09,366 INFO L470 AbstractCegarLoop]: Abstraction has 527 states and 640 transitions. [2022-01-31 20:37:09,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:37:09,367 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 640 transitions. [2022-01-31 20:37:09,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-31 20:37:09,367 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:37:09,367 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:37:09,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 20:37:09,368 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:37:09,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:37:09,368 INFO L85 PathProgramCache]: Analyzing trace with hash 470069801, now seen corresponding path program 6 times [2022-01-31 20:37:09,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:37:09,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [531548662] [2022-01-31 20:37:09,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:37:09,369 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:37:09,369 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:37:09,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:37:09,370 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:37:09,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:37:10,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:37:10,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:37:10,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-01-31 20:37:10,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:37:10,164 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 20:37:10,165 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:37:10,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [531548662] [2022-01-31 20:37:10,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [531548662] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:37:10,165 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:37:10,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 20:37:10,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651722569] [2022-01-31 20:37:10,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:37:10,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 20:37:10,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:37:10,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 20:37:10,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2022-01-31 20:37:10,166 INFO L87 Difference]: Start difference. First operand 527 states and 640 transitions. Second operand has 30 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 28 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:37:12,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:37:12,572 INFO L93 Difference]: Finished difference Result 649 states and 782 transitions. [2022-01-31 20:37:12,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 20:37:12,573 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 28 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 61 [2022-01-31 20:37:12,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:37:12,575 INFO L225 Difference]: With dead ends: 649 [2022-01-31 20:37:12,575 INFO L226 Difference]: Without dead ends: 647 [2022-01-31 20:37:12,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1504 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=606, Invalid=4650, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 20:37:12,575 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 220 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1971 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 2130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 1971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 20:37:12,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 123 Invalid, 2130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 1971 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 20:37:12,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2022-01-31 20:37:13,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 555. [2022-01-31 20:37:13,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 518 states have (on average 1.2084942084942085) internal successors, (626), 533 states have internal predecessors, (626), 23 states have call successors, (23), 14 states have call predecessors, (23), 13 states have return successors, (22), 7 states have call predecessors, (22), 22 states have call successors, (22) [2022-01-31 20:37:13,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 671 transitions. [2022-01-31 20:37:13,051 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 671 transitions. Word has length 61 [2022-01-31 20:37:13,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:37:13,052 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 671 transitions. [2022-01-31 20:37:13,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 28 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:37:13,052 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 671 transitions. [2022-01-31 20:37:13,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-31 20:37:13,053 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:37:13,053 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:37:13,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 20:37:13,053 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:37:13,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:37:13,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1495534305, now seen corresponding path program 7 times [2022-01-31 20:37:13,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:37:13,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [663969854] [2022-01-31 20:37:13,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:37:13,055 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:37:13,055 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:37:13,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:37:13,057 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:37:13,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:37:13,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:37:13,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:37:13,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-01-31 20:37:13,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:37:13,943 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 20:37:13,943 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:37:13,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [663969854] [2022-01-31 20:37:13,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [663969854] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:37:13,943 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:37:13,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 20:37:13,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644031536] [2022-01-31 20:37:13,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:37:13,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 20:37:13,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:37:13,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 20:37:13,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2022-01-31 20:37:13,945 INFO L87 Difference]: Start difference. First operand 555 states and 671 transitions. Second operand has 31 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 29 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:37:16,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:37:16,764 INFO L93 Difference]: Finished difference Result 689 states and 830 transitions. [2022-01-31 20:37:16,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 20:37:16,765 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 29 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 61 [2022-01-31 20:37:16,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:37:16,766 INFO L225 Difference]: With dead ends: 689 [2022-01-31 20:37:16,766 INFO L226 Difference]: Without dead ends: 687 [2022-01-31 20:37:16,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2154 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=936, Invalid=6036, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 20:37:16,767 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 206 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 1942 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 2140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:37:16,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 78 Invalid, 2140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 1942 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 20:37:16,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2022-01-31 20:37:17,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 558. [2022-01-31 20:37:17,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 521 states have (on average 1.2092130518234165) internal successors, (630), 536 states have internal predecessors, (630), 23 states have call successors, (23), 14 states have call predecessors, (23), 13 states have return successors, (22), 7 states have call predecessors, (22), 22 states have call successors, (22) [2022-01-31 20:37:17,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 675 transitions. [2022-01-31 20:37:17,255 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 675 transitions. Word has length 61 [2022-01-31 20:37:17,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:37:17,255 INFO L470 AbstractCegarLoop]: Abstraction has 558 states and 675 transitions. [2022-01-31 20:37:17,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 29 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:37:17,255 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 675 transitions. [2022-01-31 20:37:17,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 20:37:17,256 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:37:17,256 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:37:17,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 20:37:17,256 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:37:17,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:37:17,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1750933991, now seen corresponding path program 9 times [2022-01-31 20:37:17,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:37:17,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [185768198] [2022-01-31 20:37:17,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:37:17,258 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:37:17,258 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:37:17,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:37:17,259 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:37:17,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:37:17,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:37:17,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:37:17,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-01-31 20:37:17,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:37:17,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-01-31 20:37:17,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:37:17,817 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 20:37:17,817 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:37:17,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [185768198] [2022-01-31 20:37:17,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [185768198] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:37:17,818 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:37:17,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 20:37:17,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124070105] [2022-01-31 20:37:17,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:37:17,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 20:37:17,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:37:17,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 20:37:17,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-01-31 20:37:17,819 INFO L87 Difference]: Start difference. First operand 558 states and 675 transitions. Second operand has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:37:19,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:37:19,414 INFO L93 Difference]: Finished difference Result 641 states and 773 transitions. [2022-01-31 20:37:19,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 20:37:19,415 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 63 [2022-01-31 20:37:19,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:37:19,416 INFO L225 Difference]: With dead ends: 641 [2022-01-31 20:37:19,416 INFO L226 Difference]: Without dead ends: 639 [2022-01-31 20:37:19,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=325, Invalid=2431, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 20:37:19,417 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 201 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 1262 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 1362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:37:19,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 95 Invalid, 1362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1262 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:37:19,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-01-31 20:37:19,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 575. [2022-01-31 20:37:19,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 537 states have (on average 1.2085661080074488) internal successors, (649), 552 states have internal predecessors, (649), 24 states have call successors, (24), 14 states have call predecessors, (24), 13 states have return successors, (23), 8 states have call predecessors, (23), 23 states have call successors, (23) [2022-01-31 20:37:19,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 696 transitions. [2022-01-31 20:37:19,925 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 696 transitions. Word has length 63 [2022-01-31 20:37:19,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:37:19,925 INFO L470 AbstractCegarLoop]: Abstraction has 575 states and 696 transitions. [2022-01-31 20:37:19,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:37:19,925 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 696 transitions. [2022-01-31 20:37:19,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-31 20:37:19,926 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:37:19,926 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:37:19,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 20:37:19,926 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:37:19,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:37:19,926 INFO L85 PathProgramCache]: Analyzing trace with hash -184264233, now seen corresponding path program 18 times [2022-01-31 20:37:19,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:37:19,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [801017048] [2022-01-31 20:37:19,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:37:19,928 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:37:19,928 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:37:19,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:37:19,929 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:37:19,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:37:20,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:37:20,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:37:20,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:37:20,090 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:37:20,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [801017048] [2022-01-31 20:37:20,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [801017048] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:37:20,090 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:37:20,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 20:37:20,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128730621] [2022-01-31 20:37:20,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:37:20,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 20:37:20,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:37:20,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 20:37:20,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2022-01-31 20:37:20,091 INFO L87 Difference]: Start difference. First operand 575 states and 696 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:37:21,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:37:21,649 INFO L93 Difference]: Finished difference Result 1162 states and 1436 transitions. [2022-01-31 20:37:21,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 20:37:21,650 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-01-31 20:37:21,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:37:21,652 INFO L225 Difference]: With dead ends: 1162 [2022-01-31 20:37:21,652 INFO L226 Difference]: Without dead ends: 993 [2022-01-31 20:37:21,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=791, Unknown=0, NotChecked=0, Total=930 [2022-01-31 20:37:21,653 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 363 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:37:21,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 108 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:37:21,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2022-01-31 20:37:22,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 792. [2022-01-31 20:37:22,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 754 states have (on average 1.2188328912466844) internal successors, (919), 769 states have internal predecessors, (919), 24 states have call successors, (24), 14 states have call predecessors, (24), 13 states have return successors, (23), 8 states have call predecessors, (23), 23 states have call successors, (23) [2022-01-31 20:37:22,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 966 transitions. [2022-01-31 20:37:22,356 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 966 transitions. Word has length 61 [2022-01-31 20:37:22,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:37:22,356 INFO L470 AbstractCegarLoop]: Abstraction has 792 states and 966 transitions. [2022-01-31 20:37:22,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:37:22,356 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 966 transitions. [2022-01-31 20:37:22,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-31 20:37:22,357 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:37:22,357 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:37:22,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 20:37:22,357 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:37:22,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:37:22,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1632684826, now seen corresponding path program 15 times [2022-01-31 20:37:22,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:37:22,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [361209331] [2022-01-31 20:37:22,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:37:22,359 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:37:22,359 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:37:22,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:37:22,361 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:37:22,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:37:22,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:37:22,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:37:22,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:37:22,775 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:37:22,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [361209331] [2022-01-31 20:37:22,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [361209331] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:37:22,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:37:22,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 20:37:22,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483105359] [2022-01-31 20:37:22,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:37:22,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 20:37:22,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:37:22,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 20:37:22,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-01-31 20:37:22,776 INFO L87 Difference]: Start difference. First operand 792 states and 966 transitions. Second operand has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:37:25,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:37:25,256 INFO L93 Difference]: Finished difference Result 1064 states and 1299 transitions. [2022-01-31 20:37:25,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 20:37:25,257 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-01-31 20:37:25,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:37:25,260 INFO L225 Difference]: With dead ends: 1064 [2022-01-31 20:37:25,260 INFO L226 Difference]: Without dead ends: 1012 [2022-01-31 20:37:25,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1864 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1201, Invalid=4499, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 20:37:25,260 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 298 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 950 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:37:25,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 78 Invalid, 1164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 950 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:37:25,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2022-01-31 20:37:25,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 805. [2022-01-31 20:37:25,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 805 states, 768 states have (on average 1.2135416666666667) internal successors, (932), 782 states have internal predecessors, (932), 23 states have call successors, (23), 14 states have call predecessors, (23), 13 states have return successors, (22), 8 states have call predecessors, (22), 22 states have call successors, (22) [2022-01-31 20:37:25,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 977 transitions. [2022-01-31 20:37:25,991 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 977 transitions. Word has length 61 [2022-01-31 20:37:25,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:37:25,992 INFO L470 AbstractCegarLoop]: Abstraction has 805 states and 977 transitions. [2022-01-31 20:37:25,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:37:25,992 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 977 transitions. [2022-01-31 20:37:25,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-31 20:37:25,993 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:37:25,993 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:37:25,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 20:37:25,994 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:37:25,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:37:25,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1542934108, now seen corresponding path program 19 times [2022-01-31 20:37:25,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:37:25,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [306626487] [2022-01-31 20:37:25,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:37:25,996 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:37:25,996 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:37:25,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:37:25,997 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:37:26,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:37:26,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:37:26,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:37:26,897 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 20:37:26,898 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:37:26,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [306626487] [2022-01-31 20:37:26,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [306626487] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:37:26,898 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:37:26,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 20:37:26,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451272795] [2022-01-31 20:37:26,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:37:26,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 20:37:26,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:37:26,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 20:37:26,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2022-01-31 20:37:26,899 INFO L87 Difference]: Start difference. First operand 805 states and 977 transitions. Second operand has 31 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:37:30,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:37:30,600 INFO L93 Difference]: Finished difference Result 999 states and 1209 transitions. [2022-01-31 20:37:30,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 20:37:30,600 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-01-31 20:37:30,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:37:30,604 INFO L225 Difference]: With dead ends: 999 [2022-01-31 20:37:30,604 INFO L226 Difference]: Without dead ends: 997 [2022-01-31 20:37:30,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1798 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=759, Invalid=5883, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 20:37:30,605 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 257 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 3238 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 3408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 3238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:37:30,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 140 Invalid, 3408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 3238 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 20:37:30,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2022-01-31 20:37:31,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 820. [2022-01-31 20:37:31,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 783 states have (on average 1.2158365261813537) internal successors, (952), 797 states have internal predecessors, (952), 23 states have call successors, (23), 14 states have call predecessors, (23), 13 states have return successors, (22), 8 states have call predecessors, (22), 22 states have call successors, (22) [2022-01-31 20:37:31,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 997 transitions. [2022-01-31 20:37:31,339 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 997 transitions. Word has length 61 [2022-01-31 20:37:31,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:37:31,340 INFO L470 AbstractCegarLoop]: Abstraction has 820 states and 997 transitions. [2022-01-31 20:37:31,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:37:31,340 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 997 transitions. [2022-01-31 20:37:31,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-31 20:37:31,341 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:37:31,341 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:37:31,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 20:37:31,341 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:37:31,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:37:31,341 INFO L85 PathProgramCache]: Analyzing trace with hash 747738716, now seen corresponding path program 16 times [2022-01-31 20:37:31,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:37:31,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002723592] [2022-01-31 20:37:31,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:37:31,343 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:37:31,343 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:37:31,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:37:31,344 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:37:31,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:37:31,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:37:31,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:37:31,937 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 20:37:31,937 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:37:31,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002723592] [2022-01-31 20:37:31,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2002723592] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:37:31,937 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:37:31,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 20:37:31,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748884735] [2022-01-31 20:37:31,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:37:31,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 20:37:31,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:37:31,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 20:37:31,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-01-31 20:37:31,939 INFO L87 Difference]: Start difference. First operand 820 states and 997 transitions. Second operand has 25 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:37:34,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:37:34,174 INFO L93 Difference]: Finished difference Result 943 states and 1140 transitions. [2022-01-31 20:37:34,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 20:37:34,175 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-01-31 20:37:34,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:37:34,177 INFO L225 Difference]: With dead ends: 943 [2022-01-31 20:37:34,177 INFO L226 Difference]: Without dead ends: 941 [2022-01-31 20:37:34,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 794 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=375, Invalid=2817, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 20:37:34,178 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 182 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 1810 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 1902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 20:37:34,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 123 Invalid, 1902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1810 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 20:37:34,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2022-01-31 20:37:34,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 826. [2022-01-31 20:37:34,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 789 states have (on average 1.2167300380228137) internal successors, (960), 803 states have internal predecessors, (960), 23 states have call successors, (23), 14 states have call predecessors, (23), 13 states have return successors, (22), 8 states have call predecessors, (22), 22 states have call successors, (22) [2022-01-31 20:37:34,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1005 transitions. [2022-01-31 20:37:34,897 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1005 transitions. Word has length 61 [2022-01-31 20:37:34,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:37:34,897 INFO L470 AbstractCegarLoop]: Abstraction has 826 states and 1005 transitions. [2022-01-31 20:37:34,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:37:34,897 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1005 transitions. [2022-01-31 20:37:34,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-31 20:37:34,899 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:37:34,899 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:37:34,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 20:37:34,899 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:37:34,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:37:34,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1042853094, now seen corresponding path program 17 times [2022-01-31 20:37:34,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:37:34,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577643386] [2022-01-31 20:37:34,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:37:34,900 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:37:34,900 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:37:34,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:37:34,906 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:37:34,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:37:35,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:37:35,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:37:35,566 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 20:37:35,566 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:37:35,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577643386] [2022-01-31 20:37:35,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [577643386] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:37:35,566 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:37:35,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 20:37:35,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471114875] [2022-01-31 20:37:35,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:37:35,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 20:37:35,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:37:35,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 20:37:35,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-01-31 20:37:35,567 INFO L87 Difference]: Start difference. First operand 826 states and 1005 transitions. Second operand has 26 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:37:38,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:37:38,739 INFO L93 Difference]: Finished difference Result 1009 states and 1219 transitions. [2022-01-31 20:37:38,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 20:37:38,740 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-01-31 20:37:38,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:37:38,742 INFO L225 Difference]: With dead ends: 1009 [2022-01-31 20:37:38,742 INFO L226 Difference]: Without dead ends: 1007 [2022-01-31 20:37:38,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1534 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=622, Invalid=4780, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 20:37:38,743 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 181 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 2212 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 2347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 2212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:37:38,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 116 Invalid, 2347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 2212 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 20:37:38,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2022-01-31 20:37:39,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 811. [2022-01-31 20:37:39,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 775 states have (on average 1.2167741935483871) internal successors, (943), 788 states have internal predecessors, (943), 22 states have call successors, (22), 14 states have call predecessors, (22), 13 states have return successors, (21), 8 states have call predecessors, (21), 21 states have call successors, (21) [2022-01-31 20:37:39,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 986 transitions. [2022-01-31 20:37:39,466 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 986 transitions. Word has length 61 [2022-01-31 20:37:39,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:37:39,466 INFO L470 AbstractCegarLoop]: Abstraction has 811 states and 986 transitions. [2022-01-31 20:37:39,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:37:39,466 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 986 transitions. [2022-01-31 20:37:39,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-31 20:37:39,467 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:37:39,467 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:37:39,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 20:37:39,467 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:37:39,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:37:39,468 INFO L85 PathProgramCache]: Analyzing trace with hash -171237983, now seen corresponding path program 6 times [2022-01-31 20:37:39,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:37:39,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1603672369] [2022-01-31 20:37:39,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:37:39,469 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:37:39,469 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:37:39,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:37:39,470 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:37:39,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:37:39,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:37:39,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:37:39,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-31 20:37:39,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:37:39,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-31 20:37:39,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:37:39,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-31 20:37:39,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:37:39,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:37:39,612 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:37:39,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1603672369] [2022-01-31 20:37:39,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1603672369] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:37:39,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:37:39,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 20:37:39,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223733088] [2022-01-31 20:37:39,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:37:39,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 20:37:39,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:37:39,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 20:37:39,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-01-31 20:37:39,613 INFO L87 Difference]: Start difference. First operand 811 states and 986 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 20:37:40,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:37:40,968 INFO L93 Difference]: Finished difference Result 875 states and 1061 transitions. [2022-01-31 20:37:40,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 20:37:40,968 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 65 [2022-01-31 20:37:40,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:37:40,970 INFO L225 Difference]: With dead ends: 875 [2022-01-31 20:37:40,970 INFO L226 Difference]: Without dead ends: 800 [2022-01-31 20:37:40,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2022-01-31 20:37:40,971 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 177 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:37:40,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 74 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:37:40,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2022-01-31 20:37:41,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 774. [2022-01-31 20:37:41,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 742 states have (on average 1.1859838274932615) internal successors, (880), 754 states have internal predecessors, (880), 22 states have call successors, (22), 10 states have call predecessors, (22), 9 states have return successors, (20), 9 states have call predecessors, (20), 20 states have call successors, (20) [2022-01-31 20:37:41,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 922 transitions. [2022-01-31 20:37:41,736 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 922 transitions. Word has length 65 [2022-01-31 20:37:41,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:37:41,736 INFO L470 AbstractCegarLoop]: Abstraction has 774 states and 922 transitions. [2022-01-31 20:37:41,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 20:37:41,736 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 922 transitions. [2022-01-31 20:37:41,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 20:37:41,738 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:37:41,738 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:37:41,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 20:37:41,738 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:37:41,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:37:41,739 INFO L85 PathProgramCache]: Analyzing trace with hash 972338910, now seen corresponding path program 10 times [2022-01-31 20:37:41,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:37:41,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1583211258] [2022-01-31 20:37:41,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:37:41,740 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:37:41,740 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:37:41,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:37:41,742 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:37:41,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:37:42,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:37:42,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:37:42,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-01-31 20:37:42,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:37:42,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:37:42,046 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:37:42,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1583211258] [2022-01-31 20:37:42,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1583211258] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:37:42,047 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:37:42,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 20:37:42,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021439042] [2022-01-31 20:37:42,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:37:42,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 20:37:42,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:37:42,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 20:37:42,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2022-01-31 20:37:42,048 INFO L87 Difference]: Start difference. First operand 774 states and 922 transitions. Second operand has 21 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:37:44,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:37:44,980 INFO L93 Difference]: Finished difference Result 1019 states and 1223 transitions. [2022-01-31 20:37:44,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 20:37:44,981 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 63 [2022-01-31 20:37:44,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:37:44,984 INFO L225 Difference]: With dead ends: 1019 [2022-01-31 20:37:44,985 INFO L226 Difference]: Without dead ends: 1017 [2022-01-31 20:37:44,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1591 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=535, Invalid=5015, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 20:37:44,987 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 253 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 1954 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 2209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 1954 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 20:37:44,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 129 Invalid, 2209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 1954 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 20:37:44,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2022-01-31 20:37:45,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 821. [2022-01-31 20:37:45,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 782 states have (on average 1.186700767263427) internal successors, (928), 799 states have internal predecessors, (928), 28 states have call successors, (28), 11 states have call predecessors, (28), 10 states have return successors, (26), 10 states have call predecessors, (26), 26 states have call successors, (26) [2022-01-31 20:37:45,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 982 transitions. [2022-01-31 20:37:45,801 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 982 transitions. Word has length 63 [2022-01-31 20:37:45,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:37:45,802 INFO L470 AbstractCegarLoop]: Abstraction has 821 states and 982 transitions. [2022-01-31 20:37:45,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:37:45,802 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 982 transitions. [2022-01-31 20:37:45,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 20:37:45,803 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:37:45,803 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:37:45,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 20:37:45,803 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:37:45,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:37:45,803 INFO L85 PathProgramCache]: Analyzing trace with hash 736626974, now seen corresponding path program 11 times [2022-01-31 20:37:45,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:37:45,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [282119756] [2022-01-31 20:37:45,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:37:45,804 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:37:45,804 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:37:45,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:37:45,806 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:37:45,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:37:46,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:37:46,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:37:46,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-01-31 20:37:46,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:37:46,125 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 20:37:46,125 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:37:46,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [282119756] [2022-01-31 20:37:46,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [282119756] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:37:46,125 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:37:46,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 20:37:46,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413157691] [2022-01-31 20:37:46,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:37:46,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 20:37:46,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:37:46,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 20:37:46,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2022-01-31 20:37:46,126 INFO L87 Difference]: Start difference. First operand 821 states and 982 transitions. Second operand has 21 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:37:48,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:37:48,118 INFO L93 Difference]: Finished difference Result 878 states and 1045 transitions. [2022-01-31 20:37:48,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 20:37:48,118 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 63 [2022-01-31 20:37:48,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:37:48,120 INFO L225 Difference]: With dead ends: 878 [2022-01-31 20:37:48,121 INFO L226 Difference]: Without dead ends: 876 [2022-01-31 20:37:48,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=245, Invalid=1917, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 20:37:48,121 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 179 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1620 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 1718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:37:48,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 128 Invalid, 1718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1620 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 20:37:48,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2022-01-31 20:37:48,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 834. [2022-01-31 20:37:48,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 794 states have (on average 1.1876574307304786) internal successors, (943), 811 states have internal predecessors, (943), 28 states have call successors, (28), 12 states have call predecessors, (28), 11 states have return successors, (26), 10 states have call predecessors, (26), 26 states have call successors, (26) [2022-01-31 20:37:48,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 997 transitions. [2022-01-31 20:37:48,933 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 997 transitions. Word has length 63 [2022-01-31 20:37:48,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:37:48,933 INFO L470 AbstractCegarLoop]: Abstraction has 834 states and 997 transitions. [2022-01-31 20:37:48,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:37:48,933 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 997 transitions. [2022-01-31 20:37:48,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 20:37:48,934 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:37:48,935 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:37:48,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 20:37:48,935 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:37:48,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:37:48,935 INFO L85 PathProgramCache]: Analyzing trace with hash -578416814, now seen corresponding path program 12 times [2022-01-31 20:37:48,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:37:48,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [289564796] [2022-01-31 20:37:48,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:37:48,937 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:37:48,937 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:37:48,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:37:48,938 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:37:48,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:37:49,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:37:49,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:37:49,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-01-31 20:37:49,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:37:49,347 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 20:37:49,347 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:37:49,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [289564796] [2022-01-31 20:37:49,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [289564796] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:37:49,347 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:37:49,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 20:37:49,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791725510] [2022-01-31 20:37:49,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:37:49,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 20:37:49,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:37:49,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 20:37:49,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-01-31 20:37:49,348 INFO L87 Difference]: Start difference. First operand 834 states and 997 transitions. Second operand has 22 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:37:51,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:37:51,163 INFO L93 Difference]: Finished difference Result 893 states and 1065 transitions. [2022-01-31 20:37:51,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 20:37:51,163 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 63 [2022-01-31 20:37:51,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:37:51,166 INFO L225 Difference]: With dead ends: 893 [2022-01-31 20:37:51,166 INFO L226 Difference]: Without dead ends: 891 [2022-01-31 20:37:51,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=281, Invalid=1881, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 20:37:51,167 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 137 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 1249 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 1319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:37:51,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 100 Invalid, 1319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1249 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:37:51,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2022-01-31 20:37:51,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 825. [2022-01-31 20:37:51,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 785 states have (on average 1.1885350318471337) internal successors, (933), 802 states have internal predecessors, (933), 28 states have call successors, (28), 12 states have call predecessors, (28), 11 states have return successors, (26), 10 states have call predecessors, (26), 26 states have call successors, (26) [2022-01-31 20:37:51,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 987 transitions. [2022-01-31 20:37:51,979 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 987 transitions. Word has length 63 [2022-01-31 20:37:51,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:37:51,979 INFO L470 AbstractCegarLoop]: Abstraction has 825 states and 987 transitions. [2022-01-31 20:37:51,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:37:51,979 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 987 transitions. [2022-01-31 20:37:51,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 20:37:51,981 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:37:51,981 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:37:51,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 20:37:51,981 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:37:51,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:37:51,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1107936288, now seen corresponding path program 8 times [2022-01-31 20:37:51,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:37:51,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [553390841] [2022-01-31 20:37:51,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:37:51,983 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:37:51,983 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:37:51,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:37:51,985 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:37:52,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:37:52,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:37:52,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:37:52,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-01-31 20:37:52,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:37:52,868 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 20:37:52,868 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:37:52,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [553390841] [2022-01-31 20:37:52,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [553390841] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:37:52,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:37:52,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 20:37:52,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634039939] [2022-01-31 20:37:52,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:37:52,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 20:37:52,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:37:52,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 20:37:52,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1167, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 20:37:52,870 INFO L87 Difference]: Start difference. First operand 825 states and 987 transitions. Second operand has 37 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 states have internal predecessors, (57), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:37:56,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:37:56,438 INFO L93 Difference]: Finished difference Result 947 states and 1128 transitions. [2022-01-31 20:37:56,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 20:37:56,439 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 states have internal predecessors, (57), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 63 [2022-01-31 20:37:56,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:37:56,441 INFO L225 Difference]: With dead ends: 947 [2022-01-31 20:37:56,441 INFO L226 Difference]: Without dead ends: 945 [2022-01-31 20:37:56,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2643 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=903, Invalid=7653, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 20:37:56,442 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 277 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 1934 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 2181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 1934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:37:56,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 95 Invalid, 2181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 1934 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 20:37:56,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2022-01-31 20:37:57,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 825. [2022-01-31 20:37:57,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 785 states have (on average 1.1885350318471337) internal successors, (933), 802 states have internal predecessors, (933), 28 states have call successors, (28), 12 states have call predecessors, (28), 11 states have return successors, (26), 10 states have call predecessors, (26), 26 states have call successors, (26) [2022-01-31 20:37:57,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 987 transitions. [2022-01-31 20:37:57,251 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 987 transitions. Word has length 63 [2022-01-31 20:37:57,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:37:57,252 INFO L470 AbstractCegarLoop]: Abstraction has 825 states and 987 transitions. [2022-01-31 20:37:57,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 states have internal predecessors, (57), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:37:57,252 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 987 transitions. [2022-01-31 20:37:57,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 20:37:57,253 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:37:57,253 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:37:57,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 20:37:57,254 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:37:57,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:37:57,254 INFO L85 PathProgramCache]: Analyzing trace with hash -645721556, now seen corresponding path program 9 times [2022-01-31 20:37:57,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:37:57,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1173128495] [2022-01-31 20:37:57,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:37:57,256 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:37:57,256 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:37:57,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:37:57,258 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:37:57,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:37:58,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:37:58,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:37:58,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 20:37:58,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:37:58,141 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 20:37:58,141 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:37:58,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1173128495] [2022-01-31 20:37:58,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1173128495] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:37:58,141 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:37:58,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 20:37:58,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068439964] [2022-01-31 20:37:58,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:37:58,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 20:37:58,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:37:58,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 20:37:58,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2022-01-31 20:37:58,142 INFO L87 Difference]: Start difference. First operand 825 states and 987 transitions. Second operand has 31 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:38:00,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:38:00,767 INFO L93 Difference]: Finished difference Result 863 states and 1030 transitions. [2022-01-31 20:38:00,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 20:38:00,767 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 64 [2022-01-31 20:38:00,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:38:00,769 INFO L225 Difference]: With dead ends: 863 [2022-01-31 20:38:00,769 INFO L226 Difference]: Without dead ends: 861 [2022-01-31 20:38:00,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=783, Invalid=4187, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 20:38:00,770 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 186 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 1296 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:38:00,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 65 Invalid, 1476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 1296 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 20:38:00,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2022-01-31 20:38:01,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 821. [2022-01-31 20:38:01,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 782 states have (on average 1.1892583120204603) internal successors, (930), 799 states have internal predecessors, (930), 27 states have call successors, (27), 12 states have call predecessors, (27), 11 states have return successors, (25), 9 states have call predecessors, (25), 25 states have call successors, (25) [2022-01-31 20:38:01,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 982 transitions. [2022-01-31 20:38:01,570 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 982 transitions. Word has length 64 [2022-01-31 20:38:01,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:38:01,570 INFO L470 AbstractCegarLoop]: Abstraction has 821 states and 982 transitions. [2022-01-31 20:38:01,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:38:01,571 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 982 transitions. [2022-01-31 20:38:01,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-31 20:38:01,572 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:38:01,572 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:38:01,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 20:38:01,572 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:38:01,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:38:01,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1217741736, now seen corresponding path program 7 times [2022-01-31 20:38:01,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:38:01,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [780882046] [2022-01-31 20:38:01,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:38:01,574 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:38:01,574 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:38:01,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:38:01,576 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:38:01,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:02,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:38:02,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:02,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-31 20:38:02,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:02,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-31 20:38:02,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:02,038 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 20:38:02,038 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:38:02,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [780882046] [2022-01-31 20:38:02,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [780882046] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:38:02,038 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:38:02,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 20:38:02,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818792102] [2022-01-31 20:38:02,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:38:02,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 20:38:02,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:38:02,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 20:38:02,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-01-31 20:38:02,039 INFO L87 Difference]: Start difference. First operand 821 states and 982 transitions. Second operand has 22 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:38:03,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:38:03,899 INFO L93 Difference]: Finished difference Result 902 states and 1080 transitions. [2022-01-31 20:38:03,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 20:38:03,900 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 65 [2022-01-31 20:38:03,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:38:03,902 INFO L225 Difference]: With dead ends: 902 [2022-01-31 20:38:03,902 INFO L226 Difference]: Without dead ends: 900 [2022-01-31 20:38:03,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=257, Invalid=1635, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 20:38:03,903 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 137 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1058 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 1121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:38:03,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 79 Invalid, 1121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1058 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:38:03,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 900 states. [2022-01-31 20:38:04,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 900 to 864. [2022-01-31 20:38:04,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 818 states have (on average 1.1858190709046454) internal successors, (970), 838 states have internal predecessors, (970), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (31), 12 states have call predecessors, (31), 31 states have call successors, (31) [2022-01-31 20:38:04,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 1034 transitions. [2022-01-31 20:38:04,804 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 1034 transitions. Word has length 65 [2022-01-31 20:38:04,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:38:04,804 INFO L470 AbstractCegarLoop]: Abstraction has 864 states and 1034 transitions. [2022-01-31 20:38:04,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:38:04,804 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 1034 transitions. [2022-01-31 20:38:04,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 20:38:04,805 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:38:04,805 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:38:04,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 20:38:04,805 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:38:04,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:38:04,805 INFO L85 PathProgramCache]: Analyzing trace with hash 775255317, now seen corresponding path program 20 times [2022-01-31 20:38:04,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:38:04,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [926667669] [2022-01-31 20:38:04,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:38:04,807 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:38:04,807 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:38:04,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:38:04,808 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:38:04,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:05,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:38:05,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:05,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:38:05,551 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:38:05,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [926667669] [2022-01-31 20:38:05,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [926667669] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:38:05,551 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:38:05,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 20:38:05,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372688787] [2022-01-31 20:38:05,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:38:05,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 20:38:05,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:38:05,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 20:38:05,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2022-01-31 20:38:05,556 INFO L87 Difference]: Start difference. First operand 864 states and 1034 transitions. Second operand has 29 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:08,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:38:08,626 INFO L93 Difference]: Finished difference Result 1161 states and 1397 transitions. [2022-01-31 20:38:08,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 20:38:08,627 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-01-31 20:38:08,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:38:08,628 INFO L225 Difference]: With dead ends: 1161 [2022-01-31 20:38:08,628 INFO L226 Difference]: Without dead ends: 1159 [2022-01-31 20:38:08,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1525 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=632, Invalid=4480, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 20:38:08,629 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 391 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 2011 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 2229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 2011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:38:08,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [391 Valid, 98 Invalid, 2229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 2011 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 20:38:08,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2022-01-31 20:38:09,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 924. [2022-01-31 20:38:09,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 874 states have (on average 1.188787185354691) internal successors, (1039), 896 states have internal predecessors, (1039), 35 states have call successors, (35), 15 states have call predecessors, (35), 14 states have return successors, (33), 12 states have call predecessors, (33), 33 states have call successors, (33) [2022-01-31 20:38:09,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1107 transitions. [2022-01-31 20:38:09,590 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1107 transitions. Word has length 63 [2022-01-31 20:38:09,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:38:09,591 INFO L470 AbstractCegarLoop]: Abstraction has 924 states and 1107 transitions. [2022-01-31 20:38:09,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:09,591 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1107 transitions. [2022-01-31 20:38:09,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 20:38:09,592 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:38:09,592 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:38:09,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 20:38:09,592 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:38:09,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:38:09,592 INFO L85 PathProgramCache]: Analyzing trace with hash -124747383, now seen corresponding path program 21 times [2022-01-31 20:38:09,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:38:09,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1867699938] [2022-01-31 20:38:09,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:38:09,594 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:38:09,594 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:38:09,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:38:09,595 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:38:09,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:10,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:38:10,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:10,391 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 20:38:10,391 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:38:10,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1867699938] [2022-01-31 20:38:10,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1867699938] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:38:10,392 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:38:10,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 20:38:10,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136808218] [2022-01-31 20:38:10,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:38:10,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 20:38:10,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:38:10,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 20:38:10,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=773, Unknown=0, NotChecked=0, Total=930 [2022-01-31 20:38:10,393 INFO L87 Difference]: Start difference. First operand 924 states and 1107 transitions. Second operand has 31 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:12,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:38:12,747 INFO L93 Difference]: Finished difference Result 1066 states and 1274 transitions. [2022-01-31 20:38:12,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 20:38:12,748 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-01-31 20:38:12,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:38:12,749 INFO L225 Difference]: With dead ends: 1066 [2022-01-31 20:38:12,749 INFO L226 Difference]: Without dead ends: 1064 [2022-01-31 20:38:12,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 999 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=584, Invalid=3198, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 20:38:12,750 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 207 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1163 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 1320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:38:12,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 64 Invalid, 1320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1163 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 20:38:12,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2022-01-31 20:38:13,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 961. [2022-01-31 20:38:13,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 961 states, 909 states have (on average 1.1903190319031902) internal successors, (1082), 932 states have internal predecessors, (1082), 36 states have call successors, (36), 16 states have call predecessors, (36), 15 states have return successors, (34), 12 states have call predecessors, (34), 34 states have call successors, (34) [2022-01-31 20:38:13,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 1152 transitions. [2022-01-31 20:38:13,717 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 1152 transitions. Word has length 63 [2022-01-31 20:38:13,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:38:13,717 INFO L470 AbstractCegarLoop]: Abstraction has 961 states and 1152 transitions. [2022-01-31 20:38:13,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:13,717 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 1152 transitions. [2022-01-31 20:38:13,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 20:38:13,718 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:38:13,718 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:38:13,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 20:38:13,718 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:38:13,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:38:13,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1311450161, now seen corresponding path program 22 times [2022-01-31 20:38:13,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:38:13,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292086811] [2022-01-31 20:38:13,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:38:13,720 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:38:13,720 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:38:13,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:38:13,722 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:38:13,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:14,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:38:14,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:14,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:38:14,618 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:38:14,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [292086811] [2022-01-31 20:38:14,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [292086811] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:38:14,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:38:14,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 20:38:14,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747266106] [2022-01-31 20:38:14,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:38:14,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 20:38:14,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:38:14,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 20:38:14,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2022-01-31 20:38:14,619 INFO L87 Difference]: Start difference. First operand 961 states and 1152 transitions. Second operand has 31 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:17,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:38:17,615 INFO L93 Difference]: Finished difference Result 1248 states and 1499 transitions. [2022-01-31 20:38:17,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 20:38:17,615 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-01-31 20:38:17,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:38:17,618 INFO L225 Difference]: With dead ends: 1248 [2022-01-31 20:38:17,618 INFO L226 Difference]: Without dead ends: 1246 [2022-01-31 20:38:17,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1513 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=610, Invalid=4502, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 20:38:17,619 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 355 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1670 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 1905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 1670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 20:38:17,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 104 Invalid, 1905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 1670 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 20:38:17,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1246 states. [2022-01-31 20:38:18,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1246 to 982. [2022-01-31 20:38:18,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 930 states have (on average 1.1935483870967742) internal successors, (1110), 953 states have internal predecessors, (1110), 36 states have call successors, (36), 16 states have call predecessors, (36), 15 states have return successors, (34), 12 states have call predecessors, (34), 34 states have call successors, (34) [2022-01-31 20:38:18,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 1180 transitions. [2022-01-31 20:38:18,701 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 1180 transitions. Word has length 63 [2022-01-31 20:38:18,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:38:18,701 INFO L470 AbstractCegarLoop]: Abstraction has 982 states and 1180 transitions. [2022-01-31 20:38:18,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:18,701 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 1180 transitions. [2022-01-31 20:38:18,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 20:38:18,702 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:38:18,702 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:38:18,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 20:38:18,702 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:38:18,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:38:18,703 INFO L85 PathProgramCache]: Analyzing trace with hash -500007896, now seen corresponding path program 10 times [2022-01-31 20:38:18,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:38:18,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1640270838] [2022-01-31 20:38:18,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:38:18,704 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:38:18,704 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:38:18,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:38:18,705 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:38:18,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:19,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:38:19,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:19,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 20:38:19,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:19,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 20:38:19,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:19,251 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 20:38:19,251 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:38:19,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1640270838] [2022-01-31 20:38:19,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1640270838] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:38:19,251 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:38:19,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 20:38:19,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862037766] [2022-01-31 20:38:19,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:38:19,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 20:38:19,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:38:19,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 20:38:19,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-01-31 20:38:19,252 INFO L87 Difference]: Start difference. First operand 982 states and 1180 transitions. Second operand has 25 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:38:21,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:38:21,506 INFO L93 Difference]: Finished difference Result 1055 states and 1266 transitions. [2022-01-31 20:38:21,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 20:38:21,507 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 66 [2022-01-31 20:38:21,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:38:21,508 INFO L225 Difference]: With dead ends: 1055 [2022-01-31 20:38:21,508 INFO L226 Difference]: Without dead ends: 995 [2022-01-31 20:38:21,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 973 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=498, Invalid=3162, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 20:38:21,509 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 168 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 1112 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 1222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:38:21,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 83 Invalid, 1222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1112 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:38:21,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2022-01-31 20:38:22,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 933. [2022-01-31 20:38:22,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 933 states, 883 states have (on average 1.1970554926387316) internal successors, (1057), 905 states have internal predecessors, (1057), 34 states have call successors, (34), 16 states have call predecessors, (34), 15 states have return successors, (32), 11 states have call predecessors, (32), 32 states have call successors, (32) [2022-01-31 20:38:22,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 933 states to 933 states and 1123 transitions. [2022-01-31 20:38:22,545 INFO L78 Accepts]: Start accepts. Automaton has 933 states and 1123 transitions. Word has length 66 [2022-01-31 20:38:22,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:38:22,545 INFO L470 AbstractCegarLoop]: Abstraction has 933 states and 1123 transitions. [2022-01-31 20:38:22,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:38:22,546 INFO L276 IsEmpty]: Start isEmpty. Operand 933 states and 1123 transitions. [2022-01-31 20:38:22,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 20:38:22,547 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:38:22,547 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:38:22,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 20:38:22,547 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:38:22,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:38:22,548 INFO L85 PathProgramCache]: Analyzing trace with hash -683336596, now seen corresponding path program 13 times [2022-01-31 20:38:22,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:38:22,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451322553] [2022-01-31 20:38:22,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:38:22,549 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:38:22,549 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:38:22,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:38:22,550 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:38:22,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:23,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:38:23,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:23,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 20:38:23,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:23,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 20:38:23,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:23,251 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 20:38:23,252 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:38:23,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1451322553] [2022-01-31 20:38:23,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1451322553] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:38:23,252 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:38:23,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 20:38:23,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003046609] [2022-01-31 20:38:23,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:38:23,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 20:38:23,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:38:23,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 20:38:23,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2022-01-31 20:38:23,253 INFO L87 Difference]: Start difference. First operand 933 states and 1123 transitions. Second operand has 31 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 29 states have internal predecessors, (55), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:38:26,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:38:26,328 INFO L93 Difference]: Finished difference Result 982 states and 1179 transitions. [2022-01-31 20:38:26,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 20:38:26,329 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 29 states have internal predecessors, (55), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 66 [2022-01-31 20:38:26,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:38:26,330 INFO L225 Difference]: With dead ends: 982 [2022-01-31 20:38:26,330 INFO L226 Difference]: Without dead ends: 933 [2022-01-31 20:38:26,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=794, Invalid=4318, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 20:38:26,331 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 213 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1554 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 1696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 1554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 20:38:26,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 104 Invalid, 1696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 1554 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 20:38:26,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2022-01-31 20:38:27,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 890. [2022-01-31 20:38:27,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 842 states have (on average 1.1995249406175772) internal successors, (1010), 863 states have internal predecessors, (1010), 32 states have call successors, (32), 16 states have call predecessors, (32), 15 states have return successors, (30), 10 states have call predecessors, (30), 30 states have call successors, (30) [2022-01-31 20:38:27,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1072 transitions. [2022-01-31 20:38:27,235 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1072 transitions. Word has length 66 [2022-01-31 20:38:27,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:38:27,235 INFO L470 AbstractCegarLoop]: Abstraction has 890 states and 1072 transitions. [2022-01-31 20:38:27,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 29 states have internal predecessors, (55), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:38:27,235 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1072 transitions. [2022-01-31 20:38:27,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 20:38:27,236 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:38:27,236 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:38:27,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 20:38:27,237 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:38:27,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:38:27,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1145647575, now seen corresponding path program 18 times [2022-01-31 20:38:27,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:38:27,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [777079534] [2022-01-31 20:38:27,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:38:27,238 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:38:27,238 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:38:27,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:38:27,239 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:38:27,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:27,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:38:27,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:27,874 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 20:38:27,874 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:38:27,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [777079534] [2022-01-31 20:38:27,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [777079534] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:38:27,874 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:38:27,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 20:38:27,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295821563] [2022-01-31 20:38:27,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:38:27,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 20:38:27,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:38:27,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 20:38:27,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2022-01-31 20:38:27,875 INFO L87 Difference]: Start difference. First operand 890 states and 1072 transitions. Second operand has 29 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:30,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:38:30,976 INFO L93 Difference]: Finished difference Result 1007 states and 1207 transitions. [2022-01-31 20:38:30,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 20:38:30,976 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-01-31 20:38:30,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:38:30,978 INFO L225 Difference]: With dead ends: 1007 [2022-01-31 20:38:30,978 INFO L226 Difference]: Without dead ends: 1005 [2022-01-31 20:38:30,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 4 SyntacticMatches, 4 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1819 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=666, Invalid=5340, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 20:38:30,979 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 229 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 2501 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 2663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 2501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:38:30,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 132 Invalid, 2663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 2501 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 20:38:30,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2022-01-31 20:38:31,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 878. [2022-01-31 20:38:31,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 832 states have (on average 1.2007211538461537) internal successors, (999), 851 states have internal predecessors, (999), 30 states have call successors, (30), 16 states have call predecessors, (30), 15 states have return successors, (28), 10 states have call predecessors, (28), 28 states have call successors, (28) [2022-01-31 20:38:31,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 1057 transitions. [2022-01-31 20:38:31,871 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 1057 transitions. Word has length 64 [2022-01-31 20:38:31,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:38:31,872 INFO L470 AbstractCegarLoop]: Abstraction has 878 states and 1057 transitions. [2022-01-31 20:38:31,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:31,872 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 1057 transitions. [2022-01-31 20:38:31,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 20:38:31,873 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:38:31,873 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:38:31,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 20:38:31,873 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:38:31,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:38:31,873 INFO L85 PathProgramCache]: Analyzing trace with hash 781141083, now seen corresponding path program 14 times [2022-01-31 20:38:31,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:38:31,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627043713] [2022-01-31 20:38:31,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:38:31,874 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:38:31,874 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:38:31,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:38:31,876 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:38:31,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:32,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:38:32,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:32,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 20:38:32,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:32,112 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 20:38:32,112 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:38:32,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627043713] [2022-01-31 20:38:32,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1627043713] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:38:32,112 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:38:32,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 20:38:32,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667709468] [2022-01-31 20:38:32,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:38:32,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 20:38:32,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:38:32,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 20:38:32,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2022-01-31 20:38:32,113 INFO L87 Difference]: Start difference. First operand 878 states and 1057 transitions. Second operand has 19 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 17 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:38:35,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:38:35,386 INFO L93 Difference]: Finished difference Result 1100 states and 1322 transitions. [2022-01-31 20:38:35,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 20:38:35,386 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 17 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 66 [2022-01-31 20:38:35,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:38:35,388 INFO L225 Difference]: With dead ends: 1100 [2022-01-31 20:38:35,388 INFO L226 Difference]: Without dead ends: 1098 [2022-01-31 20:38:35,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1409 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=471, Invalid=4785, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 20:38:35,389 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 232 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 2789 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 2954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 2789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:38:35,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 144 Invalid, 2954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 2789 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 20:38:35,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1098 states. [2022-01-31 20:38:36,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1098 to 896. [2022-01-31 20:38:36,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 848 states have (on average 1.1992924528301887) internal successors, (1017), 869 states have internal predecessors, (1017), 32 states have call successors, (32), 16 states have call predecessors, (32), 15 states have return successors, (30), 10 states have call predecessors, (30), 30 states have call successors, (30) [2022-01-31 20:38:36,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1079 transitions. [2022-01-31 20:38:36,419 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1079 transitions. Word has length 66 [2022-01-31 20:38:36,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:38:36,419 INFO L470 AbstractCegarLoop]: Abstraction has 896 states and 1079 transitions. [2022-01-31 20:38:36,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 17 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:38:36,419 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1079 transitions. [2022-01-31 20:38:36,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 20:38:36,421 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:38:36,421 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:38:36,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-01-31 20:38:36,421 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:38:36,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:38:36,421 INFO L85 PathProgramCache]: Analyzing trace with hash 276895843, now seen corresponding path program 11 times [2022-01-31 20:38:36,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:38:36,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [708392883] [2022-01-31 20:38:36,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:38:36,422 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:38:36,422 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:38:36,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:38:36,424 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:38:36,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:37,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:38:37,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:37,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 20:38:37,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:37,364 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 20:38:37,364 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:38:37,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [708392883] [2022-01-31 20:38:37,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [708392883] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:38:37,365 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:38:37,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 20:38:37,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091687807] [2022-01-31 20:38:37,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:38:37,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 20:38:37,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:38:37,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 20:38:37,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 20:38:37,365 INFO L87 Difference]: Start difference. First operand 896 states and 1079 transitions. Second operand has 33 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:38:41,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:38:41,241 INFO L93 Difference]: Finished difference Result 1046 states and 1254 transitions. [2022-01-31 20:38:41,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 20:38:41,242 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 66 [2022-01-31 20:38:41,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:38:41,243 INFO L225 Difference]: With dead ends: 1046 [2022-01-31 20:38:41,243 INFO L226 Difference]: Without dead ends: 1044 [2022-01-31 20:38:41,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2540 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=812, Invalid=7560, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 20:38:41,244 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 291 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 2392 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 2649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 2392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:38:41,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 84 Invalid, 2649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 2392 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 20:38:41,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2022-01-31 20:38:42,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 946. [2022-01-31 20:38:42,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 946 states, 894 states have (on average 1.196868008948546) internal successors, (1070), 917 states have internal predecessors, (1070), 35 states have call successors, (35), 17 states have call predecessors, (35), 16 states have return successors, (33), 11 states have call predecessors, (33), 33 states have call successors, (33) [2022-01-31 20:38:42,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 1138 transitions. [2022-01-31 20:38:42,284 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 1138 transitions. Word has length 66 [2022-01-31 20:38:42,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:38:42,284 INFO L470 AbstractCegarLoop]: Abstraction has 946 states and 1138 transitions. [2022-01-31 20:38:42,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:38:42,284 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 1138 transitions. [2022-01-31 20:38:42,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 20:38:42,285 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:38:42,285 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:38:42,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-01-31 20:38:42,285 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:38:42,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:38:42,286 INFO L85 PathProgramCache]: Analyzing trace with hash -614168551, now seen corresponding path program 12 times [2022-01-31 20:38:42,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:38:42,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368153274] [2022-01-31 20:38:42,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:38:42,287 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:38:42,287 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:38:42,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:38:42,288 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:38:42,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:43,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:38:43,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:43,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 20:38:43,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:43,098 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 20:38:43,098 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:38:43,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [368153274] [2022-01-31 20:38:43,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [368153274] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:38:43,098 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:38:43,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 20:38:43,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162946479] [2022-01-31 20:38:43,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:38:43,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 20:38:43,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:38:43,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 20:38:43,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 20:38:43,099 INFO L87 Difference]: Start difference. First operand 946 states and 1138 transitions. Second operand has 34 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 32 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:38:46,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:38:46,884 INFO L93 Difference]: Finished difference Result 1176 states and 1413 transitions. [2022-01-31 20:38:46,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 20:38:46,885 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 32 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 66 [2022-01-31 20:38:46,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:38:46,886 INFO L225 Difference]: With dead ends: 1176 [2022-01-31 20:38:46,886 INFO L226 Difference]: Without dead ends: 1174 [2022-01-31 20:38:46,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2486 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=943, Invalid=7067, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 20:38:46,887 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 271 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1838 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 2115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 1838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 20:38:46,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 62 Invalid, 2115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 1838 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 20:38:46,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1174 states. [2022-01-31 20:38:47,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1174 to 966. [2022-01-31 20:38:47,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 966 states, 912 states have (on average 1.1962719298245614) internal successors, (1091), 935 states have internal predecessors, (1091), 36 states have call successors, (36), 18 states have call predecessors, (36), 17 states have return successors, (34), 12 states have call predecessors, (34), 34 states have call successors, (34) [2022-01-31 20:38:47,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 966 states to 966 states and 1161 transitions. [2022-01-31 20:38:47,948 INFO L78 Accepts]: Start accepts. Automaton has 966 states and 1161 transitions. Word has length 66 [2022-01-31 20:38:47,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:38:47,948 INFO L470 AbstractCegarLoop]: Abstraction has 966 states and 1161 transitions. [2022-01-31 20:38:47,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 32 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:38:47,948 INFO L276 IsEmpty]: Start isEmpty. Operand 966 states and 1161 transitions. [2022-01-31 20:38:47,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 20:38:47,950 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:38:47,950 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:38:47,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-01-31 20:38:47,950 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:38:47,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:38:47,950 INFO L85 PathProgramCache]: Analyzing trace with hash -275259755, now seen corresponding path program 15 times [2022-01-31 20:38:47,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:38:47,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [562579228] [2022-01-31 20:38:47,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:38:47,952 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:38:47,952 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:38:47,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:38:47,954 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:38:47,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:48,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:38:48,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:48,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 20:38:48,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:48,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 20:38:48,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:48,526 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 20:38:48,526 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:38:48,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [562579228] [2022-01-31 20:38:48,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [562579228] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:38:48,526 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:38:48,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 20:38:48,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230384911] [2022-01-31 20:38:48,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:38:48,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 20:38:48,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:38:48,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 20:38:48,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2022-01-31 20:38:48,528 INFO L87 Difference]: Start difference. First operand 966 states and 1161 transitions. Second operand has 25 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:38:51,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:38:51,591 INFO L93 Difference]: Finished difference Result 1141 states and 1371 transitions. [2022-01-31 20:38:51,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 20:38:51,592 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2022-01-31 20:38:51,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:38:51,593 INFO L225 Difference]: With dead ends: 1141 [2022-01-31 20:38:51,593 INFO L226 Difference]: Without dead ends: 1139 [2022-01-31 20:38:51,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 10 SyntacticMatches, 7 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1015 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=446, Invalid=3460, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 20:38:51,594 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 242 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1913 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 2081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 1913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 20:38:51,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 130 Invalid, 2081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 1913 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 20:38:51,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2022-01-31 20:38:52,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 995. [2022-01-31 20:38:52,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 935 states have (on average 1.1914438502673796) internal successors, (1114), 962 states have internal predecessors, (1114), 42 states have call successors, (42), 18 states have call predecessors, (42), 17 states have return successors, (40), 14 states have call predecessors, (40), 40 states have call successors, (40) [2022-01-31 20:38:52,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 1196 transitions. [2022-01-31 20:38:52,788 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 1196 transitions. Word has length 68 [2022-01-31 20:38:52,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:38:52,789 INFO L470 AbstractCegarLoop]: Abstraction has 995 states and 1196 transitions. [2022-01-31 20:38:52,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:38:52,789 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 1196 transitions. [2022-01-31 20:38:52,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 20:38:52,790 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:38:52,790 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:38:52,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-01-31 20:38:52,790 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:38:52,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:38:52,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1734012123, now seen corresponding path program 16 times [2022-01-31 20:38:52,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:38:52,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1290596539] [2022-01-31 20:38:52,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:38:52,792 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:38:52,792 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:38:52,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:38:52,793 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:38:52,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:53,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:38:53,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:53,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 20:38:53,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:53,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 20:38:53,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:53,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:38:53,250 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:38:53,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1290596539] [2022-01-31 20:38:53,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1290596539] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:38:53,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:38:53,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 20:38:53,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301428078] [2022-01-31 20:38:53,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:38:53,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 20:38:53,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:38:53,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 20:38:53,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-01-31 20:38:53,251 INFO L87 Difference]: Start difference. First operand 995 states and 1196 transitions. Second operand has 21 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:38:55,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:38:55,232 INFO L93 Difference]: Finished difference Result 1052 states and 1263 transitions. [2022-01-31 20:38:55,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 20:38:55,233 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2022-01-31 20:38:55,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:38:55,235 INFO L225 Difference]: With dead ends: 1052 [2022-01-31 20:38:55,235 INFO L226 Difference]: Without dead ends: 1050 [2022-01-31 20:38:55,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=220, Invalid=1420, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 20:38:55,235 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 136 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 886 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:38:55,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 63 Invalid, 942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 886 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:38:55,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2022-01-31 20:38:56,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 983. [2022-01-31 20:38:56,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 983 states, 924 states have (on average 1.1926406926406927) internal successors, (1102), 950 states have internal predecessors, (1102), 41 states have call successors, (41), 18 states have call predecessors, (41), 17 states have return successors, (39), 14 states have call predecessors, (39), 39 states have call successors, (39) [2022-01-31 20:38:56,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 983 states to 983 states and 1182 transitions. [2022-01-31 20:38:56,393 INFO L78 Accepts]: Start accepts. Automaton has 983 states and 1182 transitions. Word has length 68 [2022-01-31 20:38:56,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:38:56,393 INFO L470 AbstractCegarLoop]: Abstraction has 983 states and 1182 transitions. [2022-01-31 20:38:56,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:38:56,393 INFO L276 IsEmpty]: Start isEmpty. Operand 983 states and 1182 transitions. [2022-01-31 20:38:56,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 20:38:56,395 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:38:56,395 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:38:56,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-01-31 20:38:56,395 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:38:56,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:38:56,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1737340720, now seen corresponding path program 23 times [2022-01-31 20:38:56,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:38:56,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1509033120] [2022-01-31 20:38:56,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:38:56,396 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:38:56,396 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:38:56,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:38:56,398 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:38:56,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:57,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:38:57,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:57,321 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 20:38:57,321 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:38:57,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1509033120] [2022-01-31 20:38:57,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1509033120] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:38:57,321 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:38:57,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 20:38:57,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811575766] [2022-01-31 20:38:57,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:38:57,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 20:38:57,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:38:57,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 20:38:57,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2022-01-31 20:38:57,322 INFO L87 Difference]: Start difference. First operand 983 states and 1182 transitions. Second operand has 31 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:39:01,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:39:01,286 INFO L93 Difference]: Finished difference Result 1310 states and 1581 transitions. [2022-01-31 20:39:01,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 20:39:01,287 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-01-31 20:39:01,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:39:01,289 INFO L225 Difference]: With dead ends: 1310 [2022-01-31 20:39:01,289 INFO L226 Difference]: Without dead ends: 1308 [2022-01-31 20:39:01,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1992 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=671, Invalid=5809, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 20:39:01,289 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 474 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 2619 mSolverCounterSat, 294 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 2913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 294 IncrementalHoareTripleChecker+Valid, 2619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:39:01,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [474 Valid, 91 Invalid, 2913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [294 Valid, 2619 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 20:39:01,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2022-01-31 20:39:02,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 1003. [2022-01-31 20:39:02,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 942 states have (on average 1.1921443736730362) internal successors, (1123), 969 states have internal predecessors, (1123), 42 states have call successors, (42), 19 states have call predecessors, (42), 18 states have return successors, (40), 14 states have call predecessors, (40), 40 states have call successors, (40) [2022-01-31 20:39:02,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1205 transitions. [2022-01-31 20:39:02,488 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1205 transitions. Word has length 66 [2022-01-31 20:39:02,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:39:02,488 INFO L470 AbstractCegarLoop]: Abstraction has 1003 states and 1205 transitions. [2022-01-31 20:39:02,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:39:02,489 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1205 transitions. [2022-01-31 20:39:02,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 20:39:02,490 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:39:02,490 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:39:02,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-01-31 20:39:02,490 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:39:02,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:39:02,491 INFO L85 PathProgramCache]: Analyzing trace with hash 688449750, now seen corresponding path program 24 times [2022-01-31 20:39:02,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:39:02,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [681145380] [2022-01-31 20:39:02,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:39:02,492 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:39:02,492 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:39:02,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:39:02,494 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:39:02,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:39:02,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:39:02,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:39:02,996 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 20:39:02,997 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:39:02,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [681145380] [2022-01-31 20:39:02,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [681145380] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:39:02,997 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:39:02,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 20:39:02,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828646304] [2022-01-31 20:39:02,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:39:02,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 20:39:02,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:39:02,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 20:39:02,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2022-01-31 20:39:02,998 INFO L87 Difference]: Start difference. First operand 1003 states and 1205 transitions. Second operand has 28 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:39:06,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:39:06,636 INFO L93 Difference]: Finished difference Result 1207 states and 1451 transitions. [2022-01-31 20:39:06,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 20:39:06,637 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-01-31 20:39:06,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:39:06,639 INFO L225 Difference]: With dead ends: 1207 [2022-01-31 20:39:06,639 INFO L226 Difference]: Without dead ends: 1205 [2022-01-31 20:39:06,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=739, Invalid=4811, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 20:39:06,639 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 309 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 2324 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 2490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 2324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:39:06,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 112 Invalid, 2490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 2324 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 20:39:06,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2022-01-31 20:39:07,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 1013. [2022-01-31 20:39:07,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 951 states have (on average 1.1924290220820188) internal successors, (1134), 978 states have internal predecessors, (1134), 42 states have call successors, (42), 20 states have call predecessors, (42), 19 states have return successors, (40), 14 states have call predecessors, (40), 40 states have call successors, (40) [2022-01-31 20:39:07,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 1216 transitions. [2022-01-31 20:39:07,868 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 1216 transitions. Word has length 66 [2022-01-31 20:39:07,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:39:07,869 INFO L470 AbstractCegarLoop]: Abstraction has 1013 states and 1216 transitions. [2022-01-31 20:39:07,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:39:07,869 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 1216 transitions. [2022-01-31 20:39:07,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 20:39:07,870 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:39:07,870 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:39:07,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-01-31 20:39:07,871 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:39:07,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:39:07,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1136950192, now seen corresponding path program 25 times [2022-01-31 20:39:07,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:39:07,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [803460389] [2022-01-31 20:39:07,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:39:07,872 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:39:07,872 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:39:07,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:39:07,874 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:39:07,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:39:08,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:39:08,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:39:08,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:39:08,415 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:39:08,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [803460389] [2022-01-31 20:39:08,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [803460389] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:39:08,415 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:39:08,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 20:39:08,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785993595] [2022-01-31 20:39:08,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:39:08,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 20:39:08,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:39:08,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 20:39:08,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2022-01-31 20:39:08,416 INFO L87 Difference]: Start difference. First operand 1013 states and 1216 transitions. Second operand has 29 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:39:12,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:39:12,006 INFO L93 Difference]: Finished difference Result 1232 states and 1477 transitions. [2022-01-31 20:39:12,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 20:39:12,007 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-01-31 20:39:12,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:39:12,009 INFO L225 Difference]: With dead ends: 1232 [2022-01-31 20:39:12,009 INFO L226 Difference]: Without dead ends: 1230 [2022-01-31 20:39:12,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=749, Invalid=5257, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 20:39:12,010 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 450 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 1831 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 2079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 1831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 20:39:12,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [450 Valid, 75 Invalid, 2079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 1831 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 20:39:12,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2022-01-31 20:39:13,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 1025. [2022-01-31 20:39:13,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1025 states, 963 states have (on average 1.1941848390446521) internal successors, (1150), 990 states have internal predecessors, (1150), 42 states have call successors, (42), 20 states have call predecessors, (42), 19 states have return successors, (40), 14 states have call predecessors, (40), 40 states have call successors, (40) [2022-01-31 20:39:13,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 1232 transitions. [2022-01-31 20:39:13,312 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 1232 transitions. Word has length 66 [2022-01-31 20:39:13,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:39:13,312 INFO L470 AbstractCegarLoop]: Abstraction has 1025 states and 1232 transitions. [2022-01-31 20:39:13,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:39:13,313 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 1232 transitions. [2022-01-31 20:39:13,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 20:39:13,314 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:39:13,314 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:39:13,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-01-31 20:39:13,314 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:39:13,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:39:13,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1971314326, now seen corresponding path program 26 times [2022-01-31 20:39:13,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:39:13,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2064314112] [2022-01-31 20:39:13,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:39:13,316 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:39:13,316 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:39:13,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:39:13,317 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:39:13,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:39:14,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:39:14,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:39:14,055 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 20:39:14,055 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:39:14,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2064314112] [2022-01-31 20:39:14,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2064314112] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:39:14,055 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:39:14,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 20:39:14,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595843647] [2022-01-31 20:39:14,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:39:14,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 20:39:14,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:39:14,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 20:39:14,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2022-01-31 20:39:14,056 INFO L87 Difference]: Start difference. First operand 1025 states and 1232 transitions. Second operand has 29 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:39:17,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:39:17,061 INFO L93 Difference]: Finished difference Result 1134 states and 1355 transitions. [2022-01-31 20:39:17,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 20:39:17,062 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-01-31 20:39:17,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:39:17,064 INFO L225 Difference]: With dead ends: 1134 [2022-01-31 20:39:17,064 INFO L226 Difference]: Without dead ends: 1132 [2022-01-31 20:39:17,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 4 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1324 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=552, Invalid=4140, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 20:39:17,065 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 237 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1701 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 1701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 20:39:17,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 58 Invalid, 1869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 1701 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 20:39:17,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2022-01-31 20:39:18,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 1029. [2022-01-31 20:39:18,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 966 states have (on average 1.1935817805383022) internal successors, (1153), 993 states have internal predecessors, (1153), 42 states have call successors, (42), 21 states have call predecessors, (42), 20 states have return successors, (40), 14 states have call predecessors, (40), 40 states have call successors, (40) [2022-01-31 20:39:18,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 1235 transitions. [2022-01-31 20:39:18,370 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 1235 transitions. Word has length 66 [2022-01-31 20:39:18,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:39:18,370 INFO L470 AbstractCegarLoop]: Abstraction has 1029 states and 1235 transitions. [2022-01-31 20:39:18,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:39:18,370 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 1235 transitions. [2022-01-31 20:39:18,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 20:39:18,372 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:39:18,372 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:39:18,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-01-31 20:39:18,372 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:39:18,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:39:18,372 INFO L85 PathProgramCache]: Analyzing trace with hash -2061955934, now seen corresponding path program 27 times [2022-01-31 20:39:18,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:39:18,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [644012666] [2022-01-31 20:39:18,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:39:18,373 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:39:18,373 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:39:18,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:39:18,375 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:39:18,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:39:19,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:39:19,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:39:19,268 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 20:39:19,268 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:39:19,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [644012666] [2022-01-31 20:39:19,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [644012666] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:39:19,269 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:39:19,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 20:39:19,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886323458] [2022-01-31 20:39:19,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:39:19,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 20:39:19,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:39:19,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 20:39:19,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2022-01-31 20:39:19,269 INFO L87 Difference]: Start difference. First operand 1029 states and 1235 transitions. Second operand has 32 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:39:22,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:39:22,392 INFO L93 Difference]: Finished difference Result 1283 states and 1537 transitions. [2022-01-31 20:39:22,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 20:39:22,392 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-01-31 20:39:22,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:39:22,394 INFO L225 Difference]: With dead ends: 1283 [2022-01-31 20:39:22,394 INFO L226 Difference]: Without dead ends: 1281 [2022-01-31 20:39:22,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1376 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=666, Invalid=4164, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 20:39:22,395 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 221 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1343 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 1343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:39:22,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 43 Invalid, 1548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 1343 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 20:39:22,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2022-01-31 20:39:23,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 1050. [2022-01-31 20:39:23,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 992 states have (on average 1.1975806451612903) internal successors, (1188), 1017 states have internal predecessors, (1188), 38 states have call successors, (38), 20 states have call predecessors, (38), 19 states have return successors, (36), 12 states have call predecessors, (36), 36 states have call successors, (36) [2022-01-31 20:39:23,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 1262 transitions. [2022-01-31 20:39:23,672 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 1262 transitions. Word has length 66 [2022-01-31 20:39:23,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:39:23,672 INFO L470 AbstractCegarLoop]: Abstraction has 1050 states and 1262 transitions. [2022-01-31 20:39:23,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:39:23,672 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 1262 transitions. [2022-01-31 20:39:23,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 20:39:23,674 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:39:23,674 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:39:23,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-01-31 20:39:23,674 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:39:23,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:39:23,675 INFO L85 PathProgramCache]: Analyzing trace with hash -140337438, now seen corresponding path program 28 times [2022-01-31 20:39:23,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:39:23,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [978494956] [2022-01-31 20:39:23,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:39:23,676 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:39:23,676 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:39:23,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:39:23,677 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:39:23,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:39:24,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:39:24,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:39:24,318 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 20:39:24,318 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:39:24,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [978494956] [2022-01-31 20:39:24,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [978494956] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:39:24,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:39:24,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 20:39:24,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466630675] [2022-01-31 20:39:24,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:39:24,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 20:39:24,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:39:24,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 20:39:24,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2022-01-31 20:39:24,319 INFO L87 Difference]: Start difference. First operand 1050 states and 1262 transitions. Second operand has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:39:27,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:39:27,507 INFO L93 Difference]: Finished difference Result 1228 states and 1477 transitions. [2022-01-31 20:39:27,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 20:39:27,507 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-01-31 20:39:27,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:39:27,509 INFO L225 Difference]: With dead ends: 1228 [2022-01-31 20:39:27,509 INFO L226 Difference]: Without dead ends: 1226 [2022-01-31 20:39:27,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1241 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=553, Invalid=4003, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 20:39:27,510 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 209 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 1477 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 1620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 20:39:27,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 91 Invalid, 1620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1477 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 20:39:27,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1226 states. [2022-01-31 20:39:28,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1226 to 1102. [2022-01-31 20:39:28,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 1039 states have (on average 1.1982675649663137) internal successors, (1245), 1068 states have internal predecessors, (1245), 42 states have call successors, (42), 21 states have call predecessors, (42), 20 states have return successors, (40), 12 states have call predecessors, (40), 40 states have call successors, (40) [2022-01-31 20:39:28,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 1327 transitions. [2022-01-31 20:39:28,943 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 1327 transitions. Word has length 66 [2022-01-31 20:39:28,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:39:28,943 INFO L470 AbstractCegarLoop]: Abstraction has 1102 states and 1327 transitions. [2022-01-31 20:39:28,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:39:28,943 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 1327 transitions. [2022-01-31 20:39:28,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 20:39:28,945 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:39:28,945 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:39:28,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-01-31 20:39:28,945 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:39:28,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:39:28,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1333008662, now seen corresponding path program 29 times [2022-01-31 20:39:28,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:39:28,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [423013071] [2022-01-31 20:39:28,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:39:28,946 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:39:28,946 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:39:28,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:39:28,948 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:39:28,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:39:29,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:39:29,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:39:29,707 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 20:39:29,708 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:39:29,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [423013071] [2022-01-31 20:39:29,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [423013071] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:39:29,708 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:39:29,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 20:39:29,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506099927] [2022-01-31 20:39:29,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:39:29,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 20:39:29,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:39:29,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 20:39:29,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 20:39:29,708 INFO L87 Difference]: Start difference. First operand 1102 states and 1327 transitions. Second operand has 33 states, 32 states have (on average 1.9375) internal successors, (62), 31 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:39:33,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:39:33,250 INFO L93 Difference]: Finished difference Result 1253 states and 1503 transitions. [2022-01-31 20:39:33,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 20:39:33,251 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.9375) internal successors, (62), 31 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-01-31 20:39:33,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:39:33,254 INFO L225 Difference]: With dead ends: 1253 [2022-01-31 20:39:33,254 INFO L226 Difference]: Without dead ends: 1251 [2022-01-31 20:39:33,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1528 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=714, Invalid=4836, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 20:39:33,255 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 182 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 2137 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 2279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 2137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:39:33,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 77 Invalid, 2279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 2137 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 20:39:33,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2022-01-31 20:39:34,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1087. [2022-01-31 20:39:34,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 1026 states have (on average 1.1998050682261208) internal successors, (1231), 1053 states have internal predecessors, (1231), 40 states have call successors, (40), 21 states have call predecessors, (40), 20 states have return successors, (38), 12 states have call predecessors, (38), 38 states have call successors, (38) [2022-01-31 20:39:34,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 1309 transitions. [2022-01-31 20:39:34,711 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 1309 transitions. Word has length 66 [2022-01-31 20:39:34,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:39:34,711 INFO L470 AbstractCegarLoop]: Abstraction has 1087 states and 1309 transitions. [2022-01-31 20:39:34,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.9375) internal successors, (62), 31 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:39:34,711 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 1309 transitions. [2022-01-31 20:39:34,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 20:39:34,713 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:39:34,713 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:39:34,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-01-31 20:39:34,713 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:39:34,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:39:34,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1811130830, now seen corresponding path program 19 times [2022-01-31 20:39:34,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:39:34,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [28964671] [2022-01-31 20:39:34,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:39:34,714 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:39:34,714 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:39:34,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:39:34,716 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:39:34,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:39:35,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:39:35,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:39:35,453 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 20:39:35,454 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:39:35,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [28964671] [2022-01-31 20:39:35,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [28964671] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:39:35,454 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:39:35,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 20:39:35,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367515989] [2022-01-31 20:39:35,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:39:35,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 20:39:35,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:39:35,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 20:39:35,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2022-01-31 20:39:35,455 INFO L87 Difference]: Start difference. First operand 1087 states and 1309 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:39:39,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:39:39,280 INFO L93 Difference]: Finished difference Result 1317 states and 1589 transitions. [2022-01-31 20:39:39,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 20:39:39,280 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-01-31 20:39:39,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:39:39,282 INFO L225 Difference]: With dead ends: 1317 [2022-01-31 20:39:39,282 INFO L226 Difference]: Without dead ends: 1315 [2022-01-31 20:39:39,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1598 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=687, Invalid=5475, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 20:39:39,283 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 311 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 2151 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 2351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 2151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:39:39,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 74 Invalid, 2351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 2151 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 20:39:39,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2022-01-31 20:39:40,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 1069. [2022-01-31 20:39:40,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 1009 states have (on average 1.199207135777998) internal successors, (1210), 1035 states have internal predecessors, (1210), 39 states have call successors, (39), 21 states have call predecessors, (39), 20 states have return successors, (37), 12 states have call predecessors, (37), 37 states have call successors, (37) [2022-01-31 20:39:40,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 1286 transitions. [2022-01-31 20:39:40,635 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 1286 transitions. Word has length 66 [2022-01-31 20:39:40,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:39:40,635 INFO L470 AbstractCegarLoop]: Abstraction has 1069 states and 1286 transitions. [2022-01-31 20:39:40,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:39:40,636 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 1286 transitions. [2022-01-31 20:39:40,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 20:39:40,637 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:39:40,637 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:39:40,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-01-31 20:39:40,637 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:39:40,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:39:40,637 INFO L85 PathProgramCache]: Analyzing trace with hash 624428052, now seen corresponding path program 20 times [2022-01-31 20:39:40,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:39:40,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990272502] [2022-01-31 20:39:40,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:39:40,639 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:39:40,639 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:39:40,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:39:40,640 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:39:40,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:39:41,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:39:41,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:39:41,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:39:41,466 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:39:41,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1990272502] [2022-01-31 20:39:41,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1990272502] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:39:41,466 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:39:41,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 20:39:41,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058564461] [2022-01-31 20:39:41,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:39:41,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 20:39:41,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:39:41,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 20:39:41,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 20:39:41,467 INFO L87 Difference]: Start difference. First operand 1069 states and 1286 transitions. Second operand has 33 states, 32 states have (on average 1.9375) internal successors, (62), 31 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:39:45,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:39:45,665 INFO L93 Difference]: Finished difference Result 1371 states and 1652 transitions. [2022-01-31 20:39:45,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 20:39:45,665 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.9375) internal successors, (62), 31 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-01-31 20:39:45,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:39:45,668 INFO L225 Difference]: With dead ends: 1371 [2022-01-31 20:39:45,668 INFO L226 Difference]: Without dead ends: 1369 [2022-01-31 20:39:45,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1946 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=743, Invalid=6229, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 20:39:45,669 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 287 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 2592 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 2782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 2592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:39:45,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 128 Invalid, 2782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 2592 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 20:39:45,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2022-01-31 20:39:47,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 1085. [2022-01-31 20:39:47,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1085 states, 1024 states have (on average 1.19921875) internal successors, (1228), 1050 states have internal predecessors, (1228), 39 states have call successors, (39), 22 states have call predecessors, (39), 21 states have return successors, (37), 12 states have call predecessors, (37), 37 states have call successors, (37) [2022-01-31 20:39:47,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1085 states to 1085 states and 1304 transitions. [2022-01-31 20:39:47,123 INFO L78 Accepts]: Start accepts. Automaton has 1085 states and 1304 transitions. Word has length 66 [2022-01-31 20:39:47,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:39:47,123 INFO L470 AbstractCegarLoop]: Abstraction has 1085 states and 1304 transitions. [2022-01-31 20:39:47,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.9375) internal successors, (62), 31 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:39:47,123 INFO L276 IsEmpty]: Start isEmpty. Operand 1085 states and 1304 transitions. [2022-01-31 20:39:47,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 20:39:47,125 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:39:47,125 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:39:47,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-01-31 20:39:47,125 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:39:47,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:39:47,125 INFO L85 PathProgramCache]: Analyzing trace with hash -337327382, now seen corresponding path program 21 times [2022-01-31 20:39:47,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:39:47,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [290405359] [2022-01-31 20:39:47,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:39:47,126 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:39:47,126 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:39:47,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:39:47,128 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:39:47,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:39:48,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:39:48,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:39:48,039 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 20:39:48,039 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:39:48,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [290405359] [2022-01-31 20:39:48,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [290405359] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:39:48,039 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:39:48,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 20:39:48,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191020972] [2022-01-31 20:39:48,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:39:48,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 20:39:48,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:39:48,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 20:39:48,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=886, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 20:39:48,040 INFO L87 Difference]: Start difference. First operand 1085 states and 1304 transitions. Second operand has 33 states, 32 states have (on average 1.9375) internal successors, (62), 31 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:39:51,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:39:51,170 INFO L93 Difference]: Finished difference Result 1218 states and 1464 transitions. [2022-01-31 20:39:51,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 20:39:51,170 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.9375) internal successors, (62), 31 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-01-31 20:39:51,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:39:51,172 INFO L225 Difference]: With dead ends: 1218 [2022-01-31 20:39:51,172 INFO L226 Difference]: Without dead ends: 1216 [2022-01-31 20:39:51,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=714, Invalid=3576, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 20:39:51,173 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 195 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 1664 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 1811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 20:39:51,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 72 Invalid, 1811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1664 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 20:39:51,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2022-01-31 20:39:52,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 1094. [2022-01-31 20:39:52,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 1033 states have (on average 1.1994191674733785) internal successors, (1239), 1059 states have internal predecessors, (1239), 39 states have call successors, (39), 22 states have call predecessors, (39), 21 states have return successors, (37), 12 states have call predecessors, (37), 37 states have call successors, (37) [2022-01-31 20:39:52,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 1315 transitions. [2022-01-31 20:39:52,580 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 1315 transitions. Word has length 66 [2022-01-31 20:39:52,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:39:52,580 INFO L470 AbstractCegarLoop]: Abstraction has 1094 states and 1315 transitions. [2022-01-31 20:39:52,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.9375) internal successors, (62), 31 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:39:52,580 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 1315 transitions. [2022-01-31 20:39:52,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 20:39:52,582 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:39:52,582 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:39:52,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-01-31 20:39:52,583 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:39:52,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:39:52,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1584291114, now seen corresponding path program 22 times [2022-01-31 20:39:52,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:39:52,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1254285551] [2022-01-31 20:39:52,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:39:52,584 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:39:52,584 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:39:52,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:39:52,586 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:39:52,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:39:53,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:39:53,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:39:53,390 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 20:39:53,390 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:39:53,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1254285551] [2022-01-31 20:39:53,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1254285551] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:39:53,390 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:39:53,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 20:39:53,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483072507] [2022-01-31 20:39:53,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:39:53,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 20:39:53,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:39:53,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 20:39:53,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 20:39:53,391 INFO L87 Difference]: Start difference. First operand 1094 states and 1315 transitions. Second operand has 33 states, 32 states have (on average 1.9375) internal successors, (62), 31 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:39:57,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:39:57,412 INFO L93 Difference]: Finished difference Result 1397 states and 1680 transitions. [2022-01-31 20:39:57,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 20:39:57,413 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.9375) internal successors, (62), 31 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-01-31 20:39:57,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:39:57,415 INFO L225 Difference]: With dead ends: 1397 [2022-01-31 20:39:57,415 INFO L226 Difference]: Without dead ends: 1395 [2022-01-31 20:39:57,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1806 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=698, Invalid=5622, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 20:39:57,415 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 389 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 2209 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 2443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 2209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:39:57,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [389 Valid, 85 Invalid, 2443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 2209 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 20:39:57,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1395 states. [2022-01-31 20:39:58,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1395 to 1107. [2022-01-31 20:39:58,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1107 states, 1043 states have (on average 1.1984659635666348) internal successors, (1250), 1071 states have internal predecessors, (1250), 41 states have call successors, (41), 23 states have call predecessors, (41), 22 states have return successors, (39), 12 states have call predecessors, (39), 39 states have call successors, (39) [2022-01-31 20:39:58,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1107 states to 1107 states and 1330 transitions. [2022-01-31 20:39:58,844 INFO L78 Accepts]: Start accepts. Automaton has 1107 states and 1330 transitions. Word has length 66 [2022-01-31 20:39:58,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:39:58,844 INFO L470 AbstractCegarLoop]: Abstraction has 1107 states and 1330 transitions. [2022-01-31 20:39:58,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.9375) internal successors, (62), 31 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:39:58,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1107 states and 1330 transitions. [2022-01-31 20:39:58,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 20:39:58,846 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:39:58,846 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:39:58,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-01-31 20:39:58,846 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:39:58,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:39:58,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1360968119, now seen corresponding path program 13 times [2022-01-31 20:39:58,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:39:58,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [719432486] [2022-01-31 20:39:58,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:39:58,847 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:39:58,847 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:39:58,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:39:58,849 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:39:58,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:39:59,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:39:59,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:39:59,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-01-31 20:39:59,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:39:59,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-31 20:39:59,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:39:59,664 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 20:39:59,664 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:39:59,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [719432486] [2022-01-31 20:39:59,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [719432486] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:39:59,664 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:39:59,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 20:39:59,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139899557] [2022-01-31 20:39:59,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:39:59,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 20:39:59,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:39:59,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 20:39:59,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 20:39:59,665 INFO L87 Difference]: Start difference. First operand 1107 states and 1330 transitions. Second operand has 34 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:40:03,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:40:03,532 INFO L93 Difference]: Finished difference Result 1208 states and 1445 transitions. [2022-01-31 20:40:03,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 20:40:03,533 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 69 [2022-01-31 20:40:03,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:40:03,534 INFO L225 Difference]: With dead ends: 1208 [2022-01-31 20:40:03,535 INFO L226 Difference]: Without dead ends: 1159 [2022-01-31 20:40:03,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2001 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=716, Invalid=5926, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 20:40:03,535 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 173 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1655 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 1655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 20:40:03,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 105 Invalid, 1831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 1655 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 20:40:03,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2022-01-31 20:40:04,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 1113. [2022-01-31 20:40:04,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1113 states, 1049 states have (on average 1.198284080076263) internal successors, (1257), 1077 states have internal predecessors, (1257), 41 states have call successors, (41), 23 states have call predecessors, (41), 22 states have return successors, (39), 12 states have call predecessors, (39), 39 states have call successors, (39) [2022-01-31 20:40:04,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1113 states to 1113 states and 1337 transitions. [2022-01-31 20:40:04,957 INFO L78 Accepts]: Start accepts. Automaton has 1113 states and 1337 transitions. Word has length 69 [2022-01-31 20:40:04,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:40:04,958 INFO L470 AbstractCegarLoop]: Abstraction has 1113 states and 1337 transitions. [2022-01-31 20:40:04,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:40:04,958 INFO L276 IsEmpty]: Start isEmpty. Operand 1113 states and 1337 transitions. [2022-01-31 20:40:04,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 20:40:04,959 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:40:04,959 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:40:04,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-01-31 20:40:04,959 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:40:04,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:40:04,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1755632320, now seen corresponding path program 14 times [2022-01-31 20:40:04,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:40:04,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [112102044] [2022-01-31 20:40:04,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:40:04,961 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:40:04,961 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:40:04,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:40:04,963 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:40:04,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:05,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:40:05,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:05,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-31 20:40:05,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:05,854 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 20:40:05,854 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:40:05,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [112102044] [2022-01-31 20:40:05,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [112102044] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:40:05,854 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:40:05,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 20:40:05,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351027941] [2022-01-31 20:40:05,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:40:05,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 20:40:05,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:40:05,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 20:40:05,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 20:40:05,855 INFO L87 Difference]: Start difference. First operand 1113 states and 1337 transitions. Second operand has 34 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 32 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:40:11,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:40:11,786 INFO L93 Difference]: Finished difference Result 1417 states and 1708 transitions. [2022-01-31 20:40:11,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 20:40:11,786 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 32 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 69 [2022-01-31 20:40:11,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:40:11,788 INFO L225 Difference]: With dead ends: 1417 [2022-01-31 20:40:11,788 INFO L226 Difference]: Without dead ends: 1415 [2022-01-31 20:40:11,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3381 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1517, Invalid=9613, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 20:40:11,789 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 365 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 2030 mSolverCounterSat, 472 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 2502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 472 IncrementalHoareTripleChecker+Valid, 2030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:40:11,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 114 Invalid, 2502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [472 Valid, 2030 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 20:40:11,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2022-01-31 20:40:13,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 1146. [2022-01-31 20:40:13,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1146 states, 1084 states have (on average 1.2001845018450183) internal successors, (1301), 1111 states have internal predecessors, (1301), 40 states have call successors, (40), 22 states have call predecessors, (40), 21 states have return successors, (38), 12 states have call predecessors, (38), 38 states have call successors, (38) [2022-01-31 20:40:13,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1146 states to 1146 states and 1379 transitions. [2022-01-31 20:40:13,296 INFO L78 Accepts]: Start accepts. Automaton has 1146 states and 1379 transitions. Word has length 69 [2022-01-31 20:40:13,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:40:13,296 INFO L470 AbstractCegarLoop]: Abstraction has 1146 states and 1379 transitions. [2022-01-31 20:40:13,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 32 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:40:13,296 INFO L276 IsEmpty]: Start isEmpty. Operand 1146 states and 1379 transitions. [2022-01-31 20:40:13,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 20:40:13,297 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:40:13,297 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:40:13,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-01-31 20:40:13,298 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:40:13,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:40:13,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1758967990, now seen corresponding path program 15 times [2022-01-31 20:40:13,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:40:13,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [167152373] [2022-01-31 20:40:13,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:40:13,299 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:40:13,299 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:40:13,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:40:13,301 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:40:13,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:14,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:40:14,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:14,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-31 20:40:14,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:14,252 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 20:40:14,252 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:40:14,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [167152373] [2022-01-31 20:40:14,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [167152373] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:40:14,252 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:40:14,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 20:40:14,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985567313] [2022-01-31 20:40:14,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:40:14,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 20:40:14,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:40:14,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 20:40:14,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 20:40:14,253 INFO L87 Difference]: Start difference. First operand 1146 states and 1379 transitions. Second operand has 33 states, 32 states have (on average 1.96875) internal successors, (63), 31 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:40:18,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:40:18,497 INFO L93 Difference]: Finished difference Result 1274 states and 1532 transitions. [2022-01-31 20:40:18,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 20:40:18,497 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.96875) internal successors, (63), 31 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 69 [2022-01-31 20:40:18,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:40:18,499 INFO L225 Difference]: With dead ends: 1274 [2022-01-31 20:40:18,499 INFO L226 Difference]: Without dead ends: 1272 [2022-01-31 20:40:18,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2467 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=789, Invalid=6867, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 20:40:18,500 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 244 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 2726 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 2915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 2726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:40:18,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 131 Invalid, 2915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 2726 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 20:40:18,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2022-01-31 20:40:20,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 1161. [2022-01-31 20:40:20,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1161 states, 1098 states have (on average 1.2003642987249545) internal successors, (1318), 1126 states have internal predecessors, (1318), 41 states have call successors, (41), 22 states have call predecessors, (41), 21 states have return successors, (39), 12 states have call predecessors, (39), 39 states have call successors, (39) [2022-01-31 20:40:20,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1161 states to 1161 states and 1398 transitions. [2022-01-31 20:40:20,045 INFO L78 Accepts]: Start accepts. Automaton has 1161 states and 1398 transitions. Word has length 69 [2022-01-31 20:40:20,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:40:20,045 INFO L470 AbstractCegarLoop]: Abstraction has 1161 states and 1398 transitions. [2022-01-31 20:40:20,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.96875) internal successors, (63), 31 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:40:20,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1161 states and 1398 transitions. [2022-01-31 20:40:20,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 20:40:20,046 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:40:20,046 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:40:20,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-01-31 20:40:20,047 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:40:20,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:40:20,047 INFO L85 PathProgramCache]: Analyzing trace with hash -310743238, now seen corresponding path program 16 times [2022-01-31 20:40:20,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:40:20,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [315764574] [2022-01-31 20:40:20,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:40:20,048 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:40:20,048 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:40:20,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:40:20,050 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:40:20,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:20,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:40:20,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:20,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-31 20:40:20,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:20,958 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 20:40:20,958 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:40:20,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [315764574] [2022-01-31 20:40:20,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [315764574] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:40:20,958 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:40:20,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 20:40:20,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095777475] [2022-01-31 20:40:20,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:40:20,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 20:40:20,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:40:20,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 20:40:20,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1139, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 20:40:20,959 INFO L87 Difference]: Start difference. First operand 1161 states and 1398 transitions. Second operand has 37 states, 36 states have (on average 1.75) internal successors, (63), 35 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:40:25,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:40:25,519 INFO L93 Difference]: Finished difference Result 1312 states and 1580 transitions. [2022-01-31 20:40:25,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 20:40:25,519 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.75) internal successors, (63), 35 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 69 [2022-01-31 20:40:25,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:40:25,521 INFO L225 Difference]: With dead ends: 1312 [2022-01-31 20:40:25,521 INFO L226 Difference]: Without dead ends: 1310 [2022-01-31 20:40:25,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2656 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1018, Invalid=7538, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 20:40:25,522 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 259 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1893 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 2134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 1893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:40:25,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 79 Invalid, 2134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 1893 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 20:40:25,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2022-01-31 20:40:27,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 1185. [2022-01-31 20:40:27,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1185 states, 1122 states have (on average 1.1996434937611409) internal successors, (1346), 1150 states have internal predecessors, (1346), 41 states have call successors, (41), 22 states have call predecessors, (41), 21 states have return successors, (39), 12 states have call predecessors, (39), 39 states have call successors, (39) [2022-01-31 20:40:27,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1185 states to 1185 states and 1426 transitions. [2022-01-31 20:40:27,064 INFO L78 Accepts]: Start accepts. Automaton has 1185 states and 1426 transitions. Word has length 69 [2022-01-31 20:40:27,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:40:27,065 INFO L470 AbstractCegarLoop]: Abstraction has 1185 states and 1426 transitions. [2022-01-31 20:40:27,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.75) internal successors, (63), 35 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:40:27,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 1426 transitions. [2022-01-31 20:40:27,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 20:40:27,066 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:40:27,066 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:40:27,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-01-31 20:40:27,066 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:40:27,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:40:27,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1053663758, now seen corresponding path program 17 times [2022-01-31 20:40:27,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:40:27,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1681282271] [2022-01-31 20:40:27,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:40:27,068 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:40:27,068 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:40:27,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:40:27,069 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:40:27,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:27,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:40:27,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:27,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-31 20:40:27,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:27,868 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 20:40:27,868 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:40:27,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1681282271] [2022-01-31 20:40:27,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1681282271] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:40:27,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:40:27,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 20:40:27,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582510931] [2022-01-31 20:40:27,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:40:27,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 20:40:27,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:40:27,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 20:40:27,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2022-01-31 20:40:27,870 INFO L87 Difference]: Start difference. First operand 1185 states and 1426 transitions. Second operand has 32 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:40:32,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:40:32,170 INFO L93 Difference]: Finished difference Result 1355 states and 1634 transitions. [2022-01-31 20:40:32,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 20:40:32,170 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 69 [2022-01-31 20:40:32,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:40:32,172 INFO L225 Difference]: With dead ends: 1355 [2022-01-31 20:40:32,172 INFO L226 Difference]: Without dead ends: 1353 [2022-01-31 20:40:32,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1824 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=826, Invalid=5336, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 20:40:32,173 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 201 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1581 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 1784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 1581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 20:40:32,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 103 Invalid, 1784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 1581 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 20:40:32,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1353 states. [2022-01-31 20:40:33,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1353 to 1185. [2022-01-31 20:40:33,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1185 states, 1122 states have (on average 1.1996434937611409) internal successors, (1346), 1150 states have internal predecessors, (1346), 41 states have call successors, (41), 22 states have call predecessors, (41), 21 states have return successors, (39), 12 states have call predecessors, (39), 39 states have call successors, (39) [2022-01-31 20:40:33,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1185 states to 1185 states and 1426 transitions. [2022-01-31 20:40:33,746 INFO L78 Accepts]: Start accepts. Automaton has 1185 states and 1426 transitions. Word has length 69 [2022-01-31 20:40:33,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:40:33,746 INFO L470 AbstractCegarLoop]: Abstraction has 1185 states and 1426 transitions. [2022-01-31 20:40:33,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:40:33,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 1426 transitions. [2022-01-31 20:40:33,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 20:40:33,748 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:40:33,748 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:40:33,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-01-31 20:40:33,749 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:40:33,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:40:33,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1944728152, now seen corresponding path program 18 times [2022-01-31 20:40:33,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:40:33,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181615605] [2022-01-31 20:40:33,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:40:33,750 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:40:33,751 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:40:33,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:40:33,753 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:40:33,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:34,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:40:34,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:34,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-31 20:40:34,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:34,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:40:34,512 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:40:34,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181615605] [2022-01-31 20:40:34,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [181615605] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:40:34,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:40:34,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 20:40:34,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957563493] [2022-01-31 20:40:34,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:40:34,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 20:40:34,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:40:34,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 20:40:34,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 20:40:34,513 INFO L87 Difference]: Start difference. First operand 1185 states and 1426 transitions. Second operand has 34 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:40:38,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:40:38,550 INFO L93 Difference]: Finished difference Result 1260 states and 1513 transitions. [2022-01-31 20:40:38,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 20:40:38,550 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 69 [2022-01-31 20:40:38,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:40:38,552 INFO L225 Difference]: With dead ends: 1260 [2022-01-31 20:40:38,552 INFO L226 Difference]: Without dead ends: 1258 [2022-01-31 20:40:38,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2123 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=724, Invalid=6248, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 20:40:38,553 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 182 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 2301 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 2447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 2301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:40:38,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 131 Invalid, 2447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 2301 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 20:40:38,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2022-01-31 20:40:40,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 1179. [2022-01-31 20:40:40,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1179 states, 1117 states have (on average 1.2005371530886302) internal successors, (1341), 1144 states have internal predecessors, (1341), 40 states have call successors, (40), 22 states have call predecessors, (40), 21 states have return successors, (38), 12 states have call predecessors, (38), 38 states have call successors, (38) [2022-01-31 20:40:40,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1179 states to 1179 states and 1419 transitions. [2022-01-31 20:40:40,133 INFO L78 Accepts]: Start accepts. Automaton has 1179 states and 1419 transitions. Word has length 69 [2022-01-31 20:40:40,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:40:40,134 INFO L470 AbstractCegarLoop]: Abstraction has 1179 states and 1419 transitions. [2022-01-31 20:40:40,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:40:40,134 INFO L276 IsEmpty]: Start isEmpty. Operand 1179 states and 1419 transitions. [2022-01-31 20:40:40,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 20:40:40,135 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:40:40,135 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:40:40,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-01-31 20:40:40,135 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:40:40,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:40:40,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1004222264, now seen corresponding path program 17 times [2022-01-31 20:40:40,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:40:40,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1759150064] [2022-01-31 20:40:40,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:40:40,136 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:40:40,136 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:40:40,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:40:40,138 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:40:40,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:40,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:40:40,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:40,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-01-31 20:40:40,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:40,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-31 20:40:40,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:40,530 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 20:40:40,531 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:40:40,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1759150064] [2022-01-31 20:40:40,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1759150064] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:40:40,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:40:40,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 20:40:40,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90085213] [2022-01-31 20:40:40,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:40:40,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 20:40:40,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:40:40,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 20:40:40,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-01-31 20:40:40,532 INFO L87 Difference]: Start difference. First operand 1179 states and 1419 transitions. Second operand has 22 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:40:43,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:40:43,899 INFO L93 Difference]: Finished difference Result 1324 states and 1594 transitions. [2022-01-31 20:40:43,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 20:40:43,900 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 71 [2022-01-31 20:40:43,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:40:43,901 INFO L225 Difference]: With dead ends: 1324 [2022-01-31 20:40:43,902 INFO L226 Difference]: Without dead ends: 1322 [2022-01-31 20:40:43,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 7 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=373, Invalid=2819, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 20:40:43,902 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 230 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 1842 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 1961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 20:40:43,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 119 Invalid, 1961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1842 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 20:40:43,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1322 states. [2022-01-31 20:40:45,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 1154. [2022-01-31 20:40:45,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1154 states, 1095 states have (on average 1.2018264840182649) internal successors, (1316), 1120 states have internal predecessors, (1316), 38 states have call successors, (38), 21 states have call predecessors, (38), 20 states have return successors, (36), 12 states have call predecessors, (36), 36 states have call successors, (36) [2022-01-31 20:40:45,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1154 states to 1154 states and 1390 transitions. [2022-01-31 20:40:45,415 INFO L78 Accepts]: Start accepts. Automaton has 1154 states and 1390 transitions. Word has length 71 [2022-01-31 20:40:45,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:40:45,415 INFO L470 AbstractCegarLoop]: Abstraction has 1154 states and 1390 transitions. [2022-01-31 20:40:45,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:40:45,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1154 states and 1390 transitions. [2022-01-31 20:40:45,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 20:40:45,417 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:40:45,417 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:40:45,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-01-31 20:40:45,417 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:40:45,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:40:45,417 INFO L85 PathProgramCache]: Analyzing trace with hash -2022160008, now seen corresponding path program 18 times [2022-01-31 20:40:45,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:40:45,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2026941023] [2022-01-31 20:40:45,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:40:45,418 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:40:45,418 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:40:45,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:40:45,421 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:40:45,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:46,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:40:46,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:46,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-01-31 20:40:46,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:46,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-31 20:40:46,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:46,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:40:46,058 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:40:46,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2026941023] [2022-01-31 20:40:46,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2026941023] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:40:46,059 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:40:46,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 20:40:46,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186552114] [2022-01-31 20:40:46,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:40:46,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 20:40:46,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:40:46,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 20:40:46,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2022-01-31 20:40:46,059 INFO L87 Difference]: Start difference. First operand 1154 states and 1390 transitions. Second operand has 30 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 states have internal predecessors, (60), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:40:49,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:40:49,684 INFO L93 Difference]: Finished difference Result 1258 states and 1513 transitions. [2022-01-31 20:40:49,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 20:40:49,684 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 states have internal predecessors, (60), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 71 [2022-01-31 20:40:49,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:40:49,686 INFO L225 Difference]: With dead ends: 1258 [2022-01-31 20:40:49,686 INFO L226 Difference]: Without dead ends: 1256 [2022-01-31 20:40:49,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1269 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=535, Invalid=4157, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 20:40:49,687 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 244 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1951 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 2117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:40:49,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 95 Invalid, 2117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1951 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 20:40:49,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2022-01-31 20:40:51,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 1224. [2022-01-31 20:40:51,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 1159 states have (on average 1.197584124245039) internal successors, (1388), 1186 states have internal predecessors, (1388), 43 states have call successors, (43), 22 states have call predecessors, (43), 21 states have return successors, (41), 15 states have call predecessors, (41), 41 states have call successors, (41) [2022-01-31 20:40:51,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 1472 transitions. [2022-01-31 20:40:51,360 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 1472 transitions. Word has length 71 [2022-01-31 20:40:51,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:40:51,360 INFO L470 AbstractCegarLoop]: Abstraction has 1224 states and 1472 transitions. [2022-01-31 20:40:51,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 states have internal predecessors, (60), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:40:51,360 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 1472 transitions. [2022-01-31 20:40:51,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 20:40:51,361 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:40:51,362 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:40:51,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-01-31 20:40:51,362 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:40:51,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:40:51,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1795844299, now seen corresponding path program 30 times [2022-01-31 20:40:51,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:40:51,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [685867002] [2022-01-31 20:40:51,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:40:51,363 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:40:51,363 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:40:51,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:40:51,365 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:40:51,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:51,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:40:51,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:51,749 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 20:40:51,749 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:40:51,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [685867002] [2022-01-31 20:40:51,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [685867002] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:40:51,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:40:51,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 20:40:51,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412431838] [2022-01-31 20:40:51,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:40:51,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 20:40:51,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:40:51,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 20:40:51,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2022-01-31 20:40:51,750 INFO L87 Difference]: Start difference. First operand 1224 states and 1472 transitions. Second operand has 24 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:59,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:40:59,285 INFO L93 Difference]: Finished difference Result 1959 states and 2391 transitions. [2022-01-31 20:40:59,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-01-31 20:40:59,286 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-01-31 20:40:59,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:40:59,289 INFO L225 Difference]: With dead ends: 1959 [2022-01-31 20:40:59,289 INFO L226 Difference]: Without dead ends: 1957 [2022-01-31 20:40:59,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8041 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1654, Invalid=20102, Unknown=0, NotChecked=0, Total=21756 [2022-01-31 20:40:59,291 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 467 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 3424 mSolverCounterSat, 596 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 4020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 596 IncrementalHoareTripleChecker+Valid, 3424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:40:59,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 134 Invalid, 4020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [596 Valid, 3424 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 20:40:59,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1957 states. [2022-01-31 20:41:01,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1957 to 1331. [2022-01-31 20:41:01,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1331 states, 1265 states have (on average 1.2110671936758892) internal successors, (1532), 1292 states have internal predecessors, (1532), 43 states have call successors, (43), 23 states have call predecessors, (43), 22 states have return successors, (41), 15 states have call predecessors, (41), 41 states have call successors, (41) [2022-01-31 20:41:01,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1331 states to 1331 states and 1616 transitions. [2022-01-31 20:41:01,144 INFO L78 Accepts]: Start accepts. Automaton has 1331 states and 1616 transitions. Word has length 69 [2022-01-31 20:41:01,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:01,144 INFO L470 AbstractCegarLoop]: Abstraction has 1331 states and 1616 transitions. [2022-01-31 20:41:01,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:01,144 INFO L276 IsEmpty]: Start isEmpty. Operand 1331 states and 1616 transitions. [2022-01-31 20:41:01,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 20:41:01,146 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:01,146 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:41:01,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-01-31 20:41:01,146 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:01,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:01,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1094779721, now seen corresponding path program 23 times [2022-01-31 20:41:01,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:01,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [350490157] [2022-01-31 20:41:01,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:01,147 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:01,147 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:01,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:01,150 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:01,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:01,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:01,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:01,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:01,232 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:01,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [350490157] [2022-01-31 20:41:01,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [350490157] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:01,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:01,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 20:41:01,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323031352] [2022-01-31 20:41:01,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:01,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 20:41:01,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:01,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 20:41:01,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-01-31 20:41:01,233 INFO L87 Difference]: Start difference. First operand 1331 states and 1616 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:04,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:04,486 INFO L93 Difference]: Finished difference Result 1588 states and 1943 transitions. [2022-01-31 20:41:04,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 20:41:04,486 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-01-31 20:41:04,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:04,488 INFO L225 Difference]: With dead ends: 1588 [2022-01-31 20:41:04,488 INFO L226 Difference]: Without dead ends: 1559 [2022-01-31 20:41:04,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=655, Invalid=1697, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 20:41:04,489 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 181 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:04,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 72 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:41:04,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1559 states. [2022-01-31 20:41:06,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1559 to 1334. [2022-01-31 20:41:06,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1334 states, 1268 states have (on average 1.2105678233438486) internal successors, (1535), 1295 states have internal predecessors, (1535), 43 states have call successors, (43), 23 states have call predecessors, (43), 22 states have return successors, (41), 15 states have call predecessors, (41), 41 states have call successors, (41) [2022-01-31 20:41:06,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 1619 transitions. [2022-01-31 20:41:06,427 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 1619 transitions. Word has length 69 [2022-01-31 20:41:06,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:06,427 INFO L470 AbstractCegarLoop]: Abstraction has 1334 states and 1619 transitions. [2022-01-31 20:41:06,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:06,427 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 1619 transitions. [2022-01-31 20:41:06,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 20:41:06,429 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:06,429 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:41:06,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-01-31 20:41:06,430 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:06,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:06,430 INFO L85 PathProgramCache]: Analyzing trace with hash -671758409, now seen corresponding path program 24 times [2022-01-31 20:41:06,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:06,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1322533186] [2022-01-31 20:41:06,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:06,434 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:06,434 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:06,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:06,437 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:06,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:07,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:07,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:07,098 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 20:41:07,098 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:07,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1322533186] [2022-01-31 20:41:07,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1322533186] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:07,098 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:07,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 20:41:07,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823704933] [2022-01-31 20:41:07,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:07,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 20:41:07,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:07,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 20:41:07,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2022-01-31 20:41:07,099 INFO L87 Difference]: Start difference. First operand 1334 states and 1619 transitions. Second operand has 27 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:13,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:13,872 INFO L93 Difference]: Finished difference Result 1696 states and 2043 transitions. [2022-01-31 20:41:13,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-31 20:41:13,873 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-01-31 20:41:13,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:13,875 INFO L225 Difference]: With dead ends: 1696 [2022-01-31 20:41:13,875 INFO L226 Difference]: Without dead ends: 1694 [2022-01-31 20:41:13,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 4 SyntacticMatches, 6 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3238 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1039, Invalid=9673, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 20:41:13,876 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 455 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 4224 mSolverCounterSat, 369 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 4593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 369 IncrementalHoareTripleChecker+Valid, 4224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:13,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [455 Valid, 100 Invalid, 4593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [369 Valid, 4224 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 20:41:13,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1694 states. [2022-01-31 20:41:15,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1694 to 1303. [2022-01-31 20:41:15,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1303 states, 1240 states have (on average 1.210483870967742) internal successors, (1501), 1266 states have internal predecessors, (1501), 41 states have call successors, (41), 22 states have call predecessors, (41), 21 states have return successors, (39), 14 states have call predecessors, (39), 39 states have call successors, (39) [2022-01-31 20:41:15,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1303 states to 1303 states and 1581 transitions. [2022-01-31 20:41:15,706 INFO L78 Accepts]: Start accepts. Automaton has 1303 states and 1581 transitions. Word has length 69 [2022-01-31 20:41:15,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:15,706 INFO L470 AbstractCegarLoop]: Abstraction has 1303 states and 1581 transitions. [2022-01-31 20:41:15,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:15,707 INFO L276 IsEmpty]: Start isEmpty. Operand 1303 states and 1581 transitions. [2022-01-31 20:41:15,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 20:41:15,708 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:15,708 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:41:15,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-01-31 20:41:15,708 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:15,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:15,708 INFO L85 PathProgramCache]: Analyzing trace with hash -643408281, now seen corresponding path program 25 times [2022-01-31 20:41:15,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:15,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [114564635] [2022-01-31 20:41:15,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:15,709 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:15,709 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:15,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:15,711 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:15,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:16,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:16,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:16,319 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 20:41:16,319 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:16,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [114564635] [2022-01-31 20:41:16,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [114564635] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:16,319 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:16,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 20:41:16,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719504217] [2022-01-31 20:41:16,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:16,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 20:41:16,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:16,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 20:41:16,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2022-01-31 20:41:16,320 INFO L87 Difference]: Start difference. First operand 1303 states and 1581 transitions. Second operand has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:20,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:20,855 INFO L93 Difference]: Finished difference Result 1490 states and 1799 transitions. [2022-01-31 20:41:20,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 20:41:20,856 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-01-31 20:41:20,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:20,857 INFO L225 Difference]: With dead ends: 1490 [2022-01-31 20:41:20,858 INFO L226 Difference]: Without dead ends: 1488 [2022-01-31 20:41:20,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1665 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=764, Invalid=5716, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 20:41:20,858 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 396 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 2236 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 2468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 2236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:20,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 118 Invalid, 2468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 2236 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 20:41:20,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1488 states. [2022-01-31 20:41:22,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1488 to 1325. [2022-01-31 20:41:22,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1325 states, 1261 states have (on average 1.211736716891356) internal successors, (1528), 1287 states have internal predecessors, (1528), 41 states have call successors, (41), 23 states have call predecessors, (41), 22 states have return successors, (39), 14 states have call predecessors, (39), 39 states have call successors, (39) [2022-01-31 20:41:22,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1325 states to 1325 states and 1608 transitions. [2022-01-31 20:41:22,737 INFO L78 Accepts]: Start accepts. Automaton has 1325 states and 1608 transitions. Word has length 69 [2022-01-31 20:41:22,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:22,737 INFO L470 AbstractCegarLoop]: Abstraction has 1325 states and 1608 transitions. [2022-01-31 20:41:22,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:22,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1325 states and 1608 transitions. [2022-01-31 20:41:22,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 20:41:22,738 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:22,739 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:41:22,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-01-31 20:41:22,739 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:22,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:22,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1309954697, now seen corresponding path program 26 times [2022-01-31 20:41:22,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:22,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1607230639] [2022-01-31 20:41:22,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:22,740 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:22,740 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:22,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:22,742 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:22,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:23,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:23,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:23,588 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 20:41:23,588 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:23,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1607230639] [2022-01-31 20:41:23,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1607230639] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:23,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:23,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 20:41:23,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629846225] [2022-01-31 20:41:23,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:23,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 20:41:23,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:23,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 20:41:23,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 20:41:23,589 INFO L87 Difference]: Start difference. First operand 1325 states and 1608 transitions. Second operand has 33 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:28,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:28,683 INFO L93 Difference]: Finished difference Result 1574 states and 1905 transitions. [2022-01-31 20:41:28,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 20:41:28,684 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-01-31 20:41:28,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:28,685 INFO L225 Difference]: With dead ends: 1574 [2022-01-31 20:41:28,686 INFO L226 Difference]: Without dead ends: 1572 [2022-01-31 20:41:28,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2317 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=709, Invalid=6601, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 20:41:28,686 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 333 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 3054 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 3261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 3054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:28,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 116 Invalid, 3261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 3054 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 20:41:28,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1572 states. [2022-01-31 20:41:30,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1572 to 1359. [2022-01-31 20:41:30,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1359 states, 1292 states have (on average 1.2128482972136223) internal successors, (1567), 1320 states have internal predecessors, (1567), 43 states have call successors, (43), 24 states have call predecessors, (43), 23 states have return successors, (41), 14 states have call predecessors, (41), 41 states have call successors, (41) [2022-01-31 20:41:30,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1359 states to 1359 states and 1651 transitions. [2022-01-31 20:41:30,597 INFO L78 Accepts]: Start accepts. Automaton has 1359 states and 1651 transitions. Word has length 69 [2022-01-31 20:41:30,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:30,597 INFO L470 AbstractCegarLoop]: Abstraction has 1359 states and 1651 transitions. [2022-01-31 20:41:30,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:30,597 INFO L276 IsEmpty]: Start isEmpty. Operand 1359 states and 1651 transitions. [2022-01-31 20:41:30,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 20:41:30,598 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:30,598 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:41:30,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-01-31 20:41:30,598 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:30,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:30,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1869063899, now seen corresponding path program 27 times [2022-01-31 20:41:30,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:30,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1497174907] [2022-01-31 20:41:30,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:30,600 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:30,600 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:30,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:30,602 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:30,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:31,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:31,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:31,435 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 20:41:31,436 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:31,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1497174907] [2022-01-31 20:41:31,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1497174907] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:31,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:31,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 20:41:31,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259871699] [2022-01-31 20:41:31,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:31,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 20:41:31,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:31,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 20:41:31,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2022-01-31 20:41:31,439 INFO L87 Difference]: Start difference. First operand 1359 states and 1651 transitions. Second operand has 32 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:36,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:36,683 INFO L93 Difference]: Finished difference Result 1647 states and 1996 transitions. [2022-01-31 20:41:36,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 20:41:36,683 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-01-31 20:41:36,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:36,686 INFO L225 Difference]: With dead ends: 1647 [2022-01-31 20:41:36,686 INFO L226 Difference]: Without dead ends: 1645 [2022-01-31 20:41:36,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=816, Invalid=6494, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 20:41:36,687 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 315 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 2837 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 3057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 2837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:36,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 139 Invalid, 3057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 2837 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 20:41:36,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1645 states. [2022-01-31 20:41:38,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1645 to 1353. [2022-01-31 20:41:38,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1353 states, 1287 states have (on average 1.2136752136752136) internal successors, (1562), 1314 states have internal predecessors, (1562), 42 states have call successors, (42), 24 states have call predecessors, (42), 23 states have return successors, (40), 14 states have call predecessors, (40), 40 states have call successors, (40) [2022-01-31 20:41:38,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1353 states to 1353 states and 1644 transitions. [2022-01-31 20:41:38,576 INFO L78 Accepts]: Start accepts. Automaton has 1353 states and 1644 transitions. Word has length 69 [2022-01-31 20:41:38,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:38,577 INFO L470 AbstractCegarLoop]: Abstraction has 1353 states and 1644 transitions. [2022-01-31 20:41:38,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:38,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1353 states and 1644 transitions. [2022-01-31 20:41:38,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 20:41:38,578 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:38,578 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:41:38,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-01-31 20:41:38,578 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:38,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:38,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1475670698, now seen corresponding path program 19 times [2022-01-31 20:41:38,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:38,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1781512987] [2022-01-31 20:41:38,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:38,580 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:38,580 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:38,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:38,582 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:38,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:39,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:39,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:39,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 20:41:39,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:39,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 20:41:39,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:39,499 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 20:41:39,500 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:39,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1781512987] [2022-01-31 20:41:39,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1781512987] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:39,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:39,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 20:41:39,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890270852] [2022-01-31 20:41:39,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:39,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 20:41:39,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:39,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 20:41:39,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 20:41:39,501 INFO L87 Difference]: Start difference. First operand 1353 states and 1644 transitions. Second operand has 33 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:41:43,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:43,075 INFO L93 Difference]: Finished difference Result 1387 states and 1681 transitions. [2022-01-31 20:41:43,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 20:41:43,075 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 72 [2022-01-31 20:41:43,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:43,077 INFO L225 Difference]: With dead ends: 1387 [2022-01-31 20:41:43,077 INFO L226 Difference]: Without dead ends: 1367 [2022-01-31 20:41:43,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=450, Invalid=4242, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 20:41:43,078 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 115 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 2185 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 2267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:43,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 103 Invalid, 2267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2185 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 20:41:43,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1367 states. [2022-01-31 20:41:44,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1367 to 1347. [2022-01-31 20:41:44,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1347 states, 1281 states have (on average 1.2123341139734582) internal successors, (1553), 1308 states have internal predecessors, (1553), 42 states have call successors, (42), 24 states have call predecessors, (42), 23 states have return successors, (40), 14 states have call predecessors, (40), 40 states have call successors, (40) [2022-01-31 20:41:44,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1347 states to 1347 states and 1635 transitions. [2022-01-31 20:41:44,959 INFO L78 Accepts]: Start accepts. Automaton has 1347 states and 1635 transitions. Word has length 72 [2022-01-31 20:41:44,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:44,959 INFO L470 AbstractCegarLoop]: Abstraction has 1347 states and 1635 transitions. [2022-01-31 20:41:44,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:41:44,959 INFO L276 IsEmpty]: Start isEmpty. Operand 1347 states and 1635 transitions. [2022-01-31 20:41:44,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 20:41:44,960 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:44,961 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:41:44,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-01-31 20:41:44,961 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:44,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:44,961 INFO L85 PathProgramCache]: Analyzing trace with hash -501669198, now seen corresponding path program 8 times [2022-01-31 20:41:44,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:44,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [606256805] [2022-01-31 20:41:44,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:44,962 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:44,962 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:44,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:44,964 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:44,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:45,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:45,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:45,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-31 20:41:45,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:45,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-31 20:41:45,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:45,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-01-31 20:41:45,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:45,329 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 20:41:45,329 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:45,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [606256805] [2022-01-31 20:41:45,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [606256805] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:45,329 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:45,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 20:41:45,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016646772] [2022-01-31 20:41:45,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:45,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 20:41:45,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:45,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 20:41:45,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-01-31 20:41:45,330 INFO L87 Difference]: Start difference. First operand 1347 states and 1635 transitions. Second operand has 21 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 20:41:48,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:48,384 INFO L93 Difference]: Finished difference Result 1435 states and 1739 transitions. [2022-01-31 20:41:48,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 20:41:48,384 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 73 [2022-01-31 20:41:48,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:48,386 INFO L225 Difference]: With dead ends: 1435 [2022-01-31 20:41:48,386 INFO L226 Difference]: Without dead ends: 1433 [2022-01-31 20:41:48,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=252, Invalid=1554, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 20:41:48,387 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 181 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1226 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 1310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:48,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 100 Invalid, 1310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1226 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:41:48,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1433 states. [2022-01-31 20:41:50,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1433 to 1413. [2022-01-31 20:41:50,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1413 states, 1332 states have (on average 1.204954954954955) internal successors, (1605), 1364 states have internal predecessors, (1605), 56 states have call successors, (56), 25 states have call predecessors, (56), 24 states have return successors, (54), 23 states have call predecessors, (54), 54 states have call successors, (54) [2022-01-31 20:41:50,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 1715 transitions. [2022-01-31 20:41:50,626 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 1715 transitions. Word has length 73 [2022-01-31 20:41:50,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:50,626 INFO L470 AbstractCegarLoop]: Abstraction has 1413 states and 1715 transitions. [2022-01-31 20:41:50,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 20:41:50,626 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 1715 transitions. [2022-01-31 20:41:50,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 20:41:50,627 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:50,628 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:41:50,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-01-31 20:41:50,628 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:50,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:50,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1791898001, now seen corresponding path program 19 times [2022-01-31 20:41:50,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:50,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2104263482] [2022-01-31 20:41:50,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:50,630 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:50,630 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:50,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:50,632 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:50,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:51,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:51,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:51,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-31 20:41:51,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:51,200 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 20:41:51,200 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:51,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2104263482] [2022-01-31 20:41:51,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2104263482] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:51,200 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:51,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 20:41:51,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428767868] [2022-01-31 20:41:51,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:51,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 20:41:51,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:51,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 20:41:51,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2022-01-31 20:41:51,201 INFO L87 Difference]: Start difference. First operand 1413 states and 1715 transitions. Second operand has 28 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:41:55,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:55,866 INFO L93 Difference]: Finished difference Result 1598 states and 1935 transitions. [2022-01-31 20:41:55,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 20:41:55,866 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 71 [2022-01-31 20:41:55,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:55,868 INFO L225 Difference]: With dead ends: 1598 [2022-01-31 20:41:55,868 INFO L226 Difference]: Without dead ends: 1596 [2022-01-31 20:41:55,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1403 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=549, Invalid=4421, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 20:41:55,869 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 361 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 2250 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 2463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 2250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:55,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 122 Invalid, 2463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 2250 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 20:41:55,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1596 states. [2022-01-31 20:41:58,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1596 to 1444. [2022-01-31 20:41:58,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1444 states, 1359 states have (on average 1.2038263428991907) internal successors, (1636), 1395 states have internal predecessors, (1636), 60 states have call successors, (60), 25 states have call predecessors, (60), 24 states have return successors, (58), 23 states have call predecessors, (58), 58 states have call successors, (58) [2022-01-31 20:41:58,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 1754 transitions. [2022-01-31 20:41:58,214 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 1754 transitions. Word has length 71 [2022-01-31 20:41:58,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:58,214 INFO L470 AbstractCegarLoop]: Abstraction has 1444 states and 1754 transitions. [2022-01-31 20:41:58,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:41:58,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 1754 transitions. [2022-01-31 20:41:58,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 20:41:58,215 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:58,215 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:41:58,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-01-31 20:41:58,216 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:58,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:58,216 INFO L85 PathProgramCache]: Analyzing trace with hash -2027609937, now seen corresponding path program 20 times [2022-01-31 20:41:58,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:58,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1429638145] [2022-01-31 20:41:58,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:58,217 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:58,217 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:58,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:58,218 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:58,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:58,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:58,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:58,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-31 20:41:58,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:58,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:58,719 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:58,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1429638145] [2022-01-31 20:41:58,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1429638145] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:58,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:58,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 20:41:58,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564784445] [2022-01-31 20:41:58,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:58,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 20:41:58,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:58,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 20:41:58,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=689, Unknown=0, NotChecked=0, Total=756 [2022-01-31 20:41:58,721 INFO L87 Difference]: Start difference. First operand 1444 states and 1754 transitions. Second operand has 28 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:42:06,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:42:06,030 INFO L93 Difference]: Finished difference Result 1989 states and 2437 transitions. [2022-01-31 20:42:06,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 20:42:06,030 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 71 [2022-01-31 20:42:06,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:42:06,033 INFO L225 Difference]: With dead ends: 1989 [2022-01-31 20:42:06,033 INFO L226 Difference]: Without dead ends: 1987 [2022-01-31 20:42:06,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 10 SyntacticMatches, 7 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3089 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=935, Invalid=8965, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 20:42:06,034 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 482 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 3192 mSolverCounterSat, 416 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 3608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 416 IncrementalHoareTripleChecker+Valid, 3192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:42:06,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [483 Valid, 151 Invalid, 3608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [416 Valid, 3192 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 20:42:06,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1987 states. [2022-01-31 20:42:08,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1987 to 1599. [2022-01-31 20:42:08,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1599 states, 1514 states have (on average 1.2166446499339498) internal successors, (1842), 1550 states have internal predecessors, (1842), 60 states have call successors, (60), 25 states have call predecessors, (60), 24 states have return successors, (58), 23 states have call predecessors, (58), 58 states have call successors, (58) [2022-01-31 20:42:08,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1599 states to 1599 states and 1960 transitions. [2022-01-31 20:42:08,574 INFO L78 Accepts]: Start accepts. Automaton has 1599 states and 1960 transitions. Word has length 71 [2022-01-31 20:42:08,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:42:08,574 INFO L470 AbstractCegarLoop]: Abstraction has 1599 states and 1960 transitions. [2022-01-31 20:42:08,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:42:08,574 INFO L276 IsEmpty]: Start isEmpty. Operand 1599 states and 1960 transitions. [2022-01-31 20:42:08,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 20:42:08,576 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:42:08,576 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:42:08,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-01-31 20:42:08,577 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:42:08,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:42:08,577 INFO L85 PathProgramCache]: Analyzing trace with hash 952313571, now seen corresponding path program 21 times [2022-01-31 20:42:08,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:42:08,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102869807] [2022-01-31 20:42:08,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:42:08,579 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:42:08,579 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:42:08,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:42:08,581 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:42:08,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:09,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:42:09,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:09,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-31 20:42:09,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:09,018 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 20:42:09,018 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:42:09,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102869807] [2022-01-31 20:42:09,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [102869807] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:42:09,018 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:42:09,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 20:42:09,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540359695] [2022-01-31 20:42:09,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:42:09,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 20:42:09,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:42:09,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 20:42:09,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2022-01-31 20:42:09,019 INFO L87 Difference]: Start difference. First operand 1599 states and 1960 transitions. Second operand has 25 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:42:13,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:42:13,456 INFO L93 Difference]: Finished difference Result 1760 states and 2157 transitions. [2022-01-31 20:42:13,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 20:42:13,456 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 71 [2022-01-31 20:42:13,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:42:13,459 INFO L225 Difference]: With dead ends: 1760 [2022-01-31 20:42:13,459 INFO L226 Difference]: Without dead ends: 1758 [2022-01-31 20:42:13,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=315, Invalid=2547, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 20:42:13,459 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 175 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 1960 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 2073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 20:42:13,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 136 Invalid, 2073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1960 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 20:42:13,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1758 states. [2022-01-31 20:42:16,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1758 to 1604. [2022-01-31 20:42:16,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1604 states, 1516 states have (on average 1.2143799472295516) internal successors, (1841), 1553 states have internal predecessors, (1841), 62 states have call successors, (62), 26 states have call predecessors, (62), 25 states have return successors, (60), 24 states have call predecessors, (60), 60 states have call successors, (60) [2022-01-31 20:42:16,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 1963 transitions. [2022-01-31 20:42:16,089 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 1963 transitions. Word has length 71 [2022-01-31 20:42:16,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:42:16,089 INFO L470 AbstractCegarLoop]: Abstraction has 1604 states and 1963 transitions. [2022-01-31 20:42:16,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:42:16,089 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 1963 transitions. [2022-01-31 20:42:16,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 20:42:16,091 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:42:16,091 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:42:16,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-01-31 20:42:16,091 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:42:16,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:42:16,091 INFO L85 PathProgramCache]: Analyzing trace with hash -945381923, now seen corresponding path program 22 times [2022-01-31 20:42:16,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:42:16,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1782484871] [2022-01-31 20:42:16,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:42:16,092 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:42:16,092 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:42:16,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:42:16,094 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:42:16,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:16,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:42:16,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:16,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-31 20:42:16,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:16,559 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 20:42:16,559 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:42:16,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1782484871] [2022-01-31 20:42:16,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1782484871] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:42:16,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:42:16,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 20:42:16,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936298572] [2022-01-31 20:42:16,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:42:16,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 20:42:16,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:42:16,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 20:42:16,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-01-31 20:42:16,560 INFO L87 Difference]: Start difference. First operand 1604 states and 1963 transitions. Second operand has 27 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:42:21,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:42:21,090 INFO L93 Difference]: Finished difference Result 1708 states and 2089 transitions. [2022-01-31 20:42:21,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 20:42:21,091 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 71 [2022-01-31 20:42:21,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:42:21,093 INFO L225 Difference]: With dead ends: 1708 [2022-01-31 20:42:21,093 INFO L226 Difference]: Without dead ends: 1706 [2022-01-31 20:42:21,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=398, Invalid=3384, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 20:42:21,093 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 214 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1984 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 2119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 20:42:21,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 131 Invalid, 2119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 1984 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 20:42:21,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1706 states. [2022-01-31 20:42:23,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1706 to 1585. [2022-01-31 20:42:23,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1500 states have (on average 1.2153333333333334) internal successors, (1823), 1535 states have internal predecessors, (1823), 59 states have call successors, (59), 26 states have call predecessors, (59), 25 states have return successors, (57), 23 states have call predecessors, (57), 57 states have call successors, (57) [2022-01-31 20:42:23,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 1939 transitions. [2022-01-31 20:42:23,667 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 1939 transitions. Word has length 71 [2022-01-31 20:42:23,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:42:23,667 INFO L470 AbstractCegarLoop]: Abstraction has 1585 states and 1939 transitions. [2022-01-31 20:42:23,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:42:23,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 1939 transitions. [2022-01-31 20:42:23,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 20:42:23,669 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:42:23,669 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:42:23,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2022-01-31 20:42:23,669 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:42:23,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:42:23,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1767419357, now seen corresponding path program 23 times [2022-01-31 20:42:23,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:42:23,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1153899988] [2022-01-31 20:42:23,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:42:23,671 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:42:23,671 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:42:23,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:42:23,673 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:42:23,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:24,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:42:24,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:24,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-31 20:42:24,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:24,163 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 20:42:24,163 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:42:24,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1153899988] [2022-01-31 20:42:24,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1153899988] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:42:24,163 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:42:24,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 20:42:24,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068870568] [2022-01-31 20:42:24,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:42:24,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 20:42:24,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:42:24,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 20:42:24,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2022-01-31 20:42:24,164 INFO L87 Difference]: Start difference. First operand 1585 states and 1939 transitions. Second operand has 26 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:42:28,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:42:28,375 INFO L93 Difference]: Finished difference Result 1715 states and 2095 transitions. [2022-01-31 20:42:28,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 20:42:28,376 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 71 [2022-01-31 20:42:28,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:42:28,378 INFO L225 Difference]: With dead ends: 1715 [2022-01-31 20:42:28,378 INFO L226 Difference]: Without dead ends: 1713 [2022-01-31 20:42:28,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=363, Invalid=3059, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 20:42:28,378 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 201 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 1392 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 1528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:42:28,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 101 Invalid, 1528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1392 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 20:42:28,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1713 states. [2022-01-31 20:42:30,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1713 to 1605. [2022-01-31 20:42:30,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1605 states, 1517 states have (on average 1.2148978246539222) internal successors, (1843), 1553 states have internal predecessors, (1843), 61 states have call successors, (61), 27 states have call predecessors, (61), 26 states have return successors, (59), 24 states have call predecessors, (59), 59 states have call successors, (59) [2022-01-31 20:42:30,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1605 states to 1605 states and 1963 transitions. [2022-01-31 20:42:30,936 INFO L78 Accepts]: Start accepts. Automaton has 1605 states and 1963 transitions. Word has length 71 [2022-01-31 20:42:30,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:42:30,936 INFO L470 AbstractCegarLoop]: Abstraction has 1605 states and 1963 transitions. [2022-01-31 20:42:30,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:42:30,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1605 states and 1963 transitions. [2022-01-31 20:42:30,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 20:42:30,938 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:42:30,938 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:42:30,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-01-31 20:42:30,938 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:42:30,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:42:30,938 INFO L85 PathProgramCache]: Analyzing trace with hash 2062115907, now seen corresponding path program 20 times [2022-01-31 20:42:30,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:42:30,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1461803328] [2022-01-31 20:42:30,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:42:30,939 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:42:30,939 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:42:30,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:42:30,942 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:42:30,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:31,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:42:31,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:31,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 20:42:31,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:31,728 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 20:42:31,728 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:42:31,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1461803328] [2022-01-31 20:42:31,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1461803328] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:42:31,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:42:31,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 20:42:31,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934958068] [2022-01-31 20:42:31,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:42:31,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 20:42:31,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:42:31,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 20:42:31,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 20:42:31,729 INFO L87 Difference]: Start difference. First operand 1605 states and 1963 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:42:39,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:42:39,738 INFO L93 Difference]: Finished difference Result 1983 states and 2429 transitions. [2022-01-31 20:42:39,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-31 20:42:39,738 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 72 [2022-01-31 20:42:39,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:42:39,741 INFO L225 Difference]: With dead ends: 1983 [2022-01-31 20:42:39,741 INFO L226 Difference]: Without dead ends: 1981 [2022-01-31 20:42:39,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3935 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1666, Invalid=10544, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 20:42:39,742 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 297 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2166 mSolverCounterSat, 386 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 2552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 386 IncrementalHoareTripleChecker+Valid, 2166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:42:39,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 125 Invalid, 2552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [386 Valid, 2166 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 20:42:39,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1981 states. [2022-01-31 20:42:42,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1981 to 1677. [2022-01-31 20:42:42,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1677 states, 1583 states have (on average 1.213518635502211) internal successors, (1921), 1622 states have internal predecessors, (1921), 66 states have call successors, (66), 28 states have call predecessors, (66), 27 states have return successors, (64), 26 states have call predecessors, (64), 64 states have call successors, (64) [2022-01-31 20:42:42,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1677 states to 1677 states and 2051 transitions. [2022-01-31 20:42:42,565 INFO L78 Accepts]: Start accepts. Automaton has 1677 states and 2051 transitions. Word has length 72 [2022-01-31 20:42:42,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:42:42,565 INFO L470 AbstractCegarLoop]: Abstraction has 1677 states and 2051 transitions. [2022-01-31 20:42:42,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:42:42,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1677 states and 2051 transitions. [2022-01-31 20:42:42,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 20:42:42,567 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:42:42,567 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:42:42,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-01-31 20:42:42,567 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:42:42,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:42:42,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1824795895, now seen corresponding path program 21 times [2022-01-31 20:42:42,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:42:42,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670284684] [2022-01-31 20:42:42,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:42:42,569 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:42:42,569 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:42:42,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:42:42,571 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:42:42,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:43,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:42:43,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:43,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 20:42:43,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:43,448 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 20:42:43,449 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:42:43,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1670284684] [2022-01-31 20:42:43,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1670284684] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:42:43,449 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:42:43,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 20:42:43,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320174888] [2022-01-31 20:42:43,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:42:43,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 20:42:43,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:42:43,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 20:42:43,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=987, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 20:42:43,450 INFO L87 Difference]: Start difference. First operand 1677 states and 2051 transitions. Second operand has 34 states, 32 states have (on average 2.0625) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:42:50,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:42:50,645 INFO L93 Difference]: Finished difference Result 2002 states and 2450 transitions. [2022-01-31 20:42:50,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 20:42:50,646 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 2.0625) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 72 [2022-01-31 20:42:50,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:42:50,648 INFO L225 Difference]: With dead ends: 2002 [2022-01-31 20:42:50,648 INFO L226 Difference]: Without dead ends: 2000 [2022-01-31 20:42:50,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2933 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1012, Invalid=8888, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 20:42:50,649 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 243 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 3163 mSolverCounterSat, 305 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 3468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 305 IncrementalHoareTripleChecker+Valid, 3163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:42:50,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 109 Invalid, 3468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [305 Valid, 3163 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 20:42:50,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2000 states. [2022-01-31 20:42:53,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2000 to 1717. [2022-01-31 20:42:53,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1717 states, 1616 states have (on average 1.2110148514851484) internal successors, (1957), 1658 states have internal predecessors, (1957), 70 states have call successors, (70), 31 states have call predecessors, (70), 30 states have return successors, (68), 27 states have call predecessors, (68), 68 states have call successors, (68) [2022-01-31 20:42:53,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1717 states to 1717 states and 2095 transitions. [2022-01-31 20:42:53,605 INFO L78 Accepts]: Start accepts. Automaton has 1717 states and 2095 transitions. Word has length 72 [2022-01-31 20:42:53,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:42:53,605 INFO L470 AbstractCegarLoop]: Abstraction has 1717 states and 2095 transitions. [2022-01-31 20:42:53,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 2.0625) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:42:53,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1717 states and 2095 transitions. [2022-01-31 20:42:53,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 20:42:53,607 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:42:53,607 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:42:53,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-01-31 20:42:53,607 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:42:53,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:42:53,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1689804415, now seen corresponding path program 22 times [2022-01-31 20:42:53,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:42:53,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523030749] [2022-01-31 20:42:53,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:42:53,608 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:42:53,608 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:42:53,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:42:53,610 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:42:53,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:54,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:42:54,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:54,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 20:42:54,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:54,377 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 20:42:54,377 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:42:54,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523030749] [2022-01-31 20:42:54,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1523030749] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:42:54,377 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:42:54,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 20:42:54,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88248092] [2022-01-31 20:42:54,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:42:54,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 20:42:54,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:42:54,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 20:42:54,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=925, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 20:42:54,378 INFO L87 Difference]: Start difference. First operand 1717 states and 2095 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:42:59,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:42:59,925 INFO L93 Difference]: Finished difference Result 1829 states and 2227 transitions. [2022-01-31 20:42:59,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 20:42:59,926 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 72 [2022-01-31 20:42:59,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:42:59,928 INFO L225 Difference]: With dead ends: 1829 [2022-01-31 20:42:59,928 INFO L226 Difference]: Without dead ends: 1827 [2022-01-31 20:42:59,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1658 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=734, Invalid=5272, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 20:42:59,929 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 204 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 2041 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 2200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 2041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:42:59,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 96 Invalid, 2200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 2041 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 20:42:59,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1827 states. [2022-01-31 20:43:02,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1827 to 1725. [2022-01-31 20:43:02,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1725 states, 1625 states have (on average 1.2116923076923076) internal successors, (1969), 1667 states have internal predecessors, (1969), 69 states have call successors, (69), 31 states have call predecessors, (69), 30 states have return successors, (67), 26 states have call predecessors, (67), 67 states have call successors, (67) [2022-01-31 20:43:02,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1725 states to 1725 states and 2105 transitions. [2022-01-31 20:43:02,908 INFO L78 Accepts]: Start accepts. Automaton has 1725 states and 2105 transitions. Word has length 72 [2022-01-31 20:43:02,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:43:02,908 INFO L470 AbstractCegarLoop]: Abstraction has 1725 states and 2105 transitions. [2022-01-31 20:43:02,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:43:02,909 INFO L276 IsEmpty]: Start isEmpty. Operand 1725 states and 2105 transitions. [2022-01-31 20:43:02,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 20:43:02,910 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:43:02,910 INFO L514 BasicCegarLoop]: trace histogram [9, 7, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:43:02,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-01-31 20:43:02,910 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:43:02,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:43:02,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1751714111, now seen corresponding path program 23 times [2022-01-31 20:43:02,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:43:02,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300569316] [2022-01-31 20:43:02,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:43:02,912 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:43:02,912 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:43:02,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:43:02,914 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:43:02,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:43:03,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:43:03,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:43:03,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 20:43:03,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:43:03,738 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 20:43:03,738 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:43:03,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300569316] [2022-01-31 20:43:03,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [300569316] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:43:03,738 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:43:03,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 20:43:03,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926840117] [2022-01-31 20:43:03,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:43:03,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 20:43:03,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:43:03,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 20:43:03,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2022-01-31 20:43:03,739 INFO L87 Difference]: Start difference. First operand 1725 states and 2105 transitions. Second operand has 32 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:43:09,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:43:09,467 INFO L93 Difference]: Finished difference Result 1955 states and 2397 transitions. [2022-01-31 20:43:09,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 20:43:09,467 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 72 [2022-01-31 20:43:09,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:43:09,470 INFO L225 Difference]: With dead ends: 1955 [2022-01-31 20:43:09,470 INFO L226 Difference]: Without dead ends: 1953 [2022-01-31 20:43:09,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1373 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=556, Invalid=4700, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 20:43:09,470 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 159 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 2150 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 2277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 2150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:43:09,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 112 Invalid, 2277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 2150 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 20:43:09,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1953 states. [2022-01-31 20:43:12,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1953 to 1736. [2022-01-31 20:43:12,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1736 states, 1633 states have (on average 1.2106552357624005) internal successors, (1977), 1676 states have internal predecessors, (1977), 71 states have call successors, (71), 32 states have call predecessors, (71), 31 states have return successors, (69), 27 states have call predecessors, (69), 69 states have call successors, (69) [2022-01-31 20:43:12,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 2117 transitions. [2022-01-31 20:43:12,485 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 2117 transitions. Word has length 72 [2022-01-31 20:43:12,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:43:12,485 INFO L470 AbstractCegarLoop]: Abstraction has 1736 states and 2117 transitions. [2022-01-31 20:43:12,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:43:12,485 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 2117 transitions. [2022-01-31 20:43:12,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 20:43:12,487 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:43:12,487 INFO L514 BasicCegarLoop]: trace histogram [9, 7, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:43:12,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2022-01-31 20:43:12,487 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:43:12,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:43:12,487 INFO L85 PathProgramCache]: Analyzing trace with hash 2091436369, now seen corresponding path program 24 times [2022-01-31 20:43:12,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:43:12,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [868897145] [2022-01-31 20:43:12,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:43:12,489 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:43:12,489 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:43:12,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:43:12,491 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:43:12,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:43:13,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:43:13,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:43:13,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 20:43:13,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:43:13,388 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 20:43:13,388 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:43:13,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [868897145] [2022-01-31 20:43:13,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [868897145] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:43:13,388 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:43:13,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 20:43:13,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171235542] [2022-01-31 20:43:13,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:43:13,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 20:43:13,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:43:13,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 20:43:13,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1112, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 20:43:13,389 INFO L87 Difference]: Start difference. First operand 1736 states and 2117 transitions. Second operand has 36 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:43:21,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:43:21,554 INFO L93 Difference]: Finished difference Result 2014 states and 2448 transitions. [2022-01-31 20:43:21,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-31 20:43:21,555 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 72 [2022-01-31 20:43:21,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:43:21,557 INFO L225 Difference]: With dead ends: 2014 [2022-01-31 20:43:21,557 INFO L226 Difference]: Without dead ends: 2012 [2022-01-31 20:43:21,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4989 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1492, Invalid=13028, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 20:43:21,558 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 356 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 3123 mSolverCounterSat, 429 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 3552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 429 IncrementalHoareTripleChecker+Valid, 3123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:43:21,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 114 Invalid, 3552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [429 Valid, 3123 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 20:43:21,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2012 states. [2022-01-31 20:43:24,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2012 to 1654. [2022-01-31 20:43:24,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1554 states have (on average 1.2065637065637065) internal successors, (1875), 1596 states have internal predecessors, (1875), 67 states have call successors, (67), 33 states have call predecessors, (67), 32 states have return successors, (65), 24 states have call predecessors, (65), 65 states have call successors, (65) [2022-01-31 20:43:24,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 2007 transitions. [2022-01-31 20:43:24,436 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 2007 transitions. Word has length 72 [2022-01-31 20:43:24,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:43:24,436 INFO L470 AbstractCegarLoop]: Abstraction has 1654 states and 2007 transitions. [2022-01-31 20:43:24,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:43:24,436 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 2007 transitions. [2022-01-31 20:43:24,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 20:43:24,438 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:43:24,438 INFO L514 BasicCegarLoop]: trace histogram [9, 7, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:43:24,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2022-01-31 20:43:24,438 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:43:24,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:43:24,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1311069383, now seen corresponding path program 25 times [2022-01-31 20:43:24,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:43:24,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [40160811] [2022-01-31 20:43:24,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:43:24,440 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:43:24,440 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:43:24,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:43:24,442 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:43:24,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:43:25,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:43:25,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:43:25,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 20:43:25,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:43:25,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:43:25,113 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:43:25,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [40160811] [2022-01-31 20:43:25,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [40160811] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:43:25,113 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:43:25,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 20:43:25,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86525270] [2022-01-31 20:43:25,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:43:25,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 20:43:25,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:43:25,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 20:43:25,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 20:43:25,114 INFO L87 Difference]: Start difference. First operand 1654 states and 2007 transitions. Second operand has 34 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 32 states have internal predecessors, (64), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:43:30,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:43:30,690 INFO L93 Difference]: Finished difference Result 1773 states and 2147 transitions. [2022-01-31 20:43:30,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 20:43:30,690 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 32 states have internal predecessors, (64), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 72 [2022-01-31 20:43:30,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:43:30,693 INFO L225 Difference]: With dead ends: 1773 [2022-01-31 20:43:30,693 INFO L226 Difference]: Without dead ends: 1771 [2022-01-31 20:43:30,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1946 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=659, Invalid=5821, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 20:43:30,693 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 169 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 2221 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 2381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 2221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:43:30,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 114 Invalid, 2381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 2221 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 20:43:30,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1771 states. [2022-01-31 20:43:33,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1771 to 1654. [2022-01-31 20:43:33,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1554 states have (on average 1.2065637065637065) internal successors, (1875), 1596 states have internal predecessors, (1875), 67 states have call successors, (67), 33 states have call predecessors, (67), 32 states have return successors, (65), 24 states have call predecessors, (65), 65 states have call successors, (65) [2022-01-31 20:43:33,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 2007 transitions. [2022-01-31 20:43:33,555 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 2007 transitions. Word has length 72 [2022-01-31 20:43:33,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:43:33,555 INFO L470 AbstractCegarLoop]: Abstraction has 1654 states and 2007 transitions. [2022-01-31 20:43:33,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 32 states have internal predecessors, (64), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:43:33,555 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 2007 transitions. [2022-01-31 20:43:33,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 20:43:33,557 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:43:33,557 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:43:33,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2022-01-31 20:43:33,557 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:43:33,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:43:33,558 INFO L85 PathProgramCache]: Analyzing trace with hash 935343017, now seen corresponding path program 9 times [2022-01-31 20:43:33,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:43:33,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [927967828] [2022-01-31 20:43:33,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:43:33,559 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:43:33,559 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:43:33,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:43:33,561 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:43:33,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:43:34,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:43:34,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:43:34,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-31 20:43:34,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:43:34,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-01-31 20:43:34,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:43:34,255 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 20:43:34,255 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:43:34,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [927967828] [2022-01-31 20:43:34,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [927967828] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:43:34,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:43:34,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 20:43:34,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024870611] [2022-01-31 20:43:34,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:43:34,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 20:43:34,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:43:34,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 20:43:34,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2022-01-31 20:43:34,256 INFO L87 Difference]: Start difference. First operand 1654 states and 2007 transitions. Second operand has 28 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:43:41,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:43:41,533 INFO L93 Difference]: Finished difference Result 2126 states and 2599 transitions. [2022-01-31 20:43:41,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 20:43:41,533 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 73 [2022-01-31 20:43:41,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:43:41,536 INFO L225 Difference]: With dead ends: 2126 [2022-01-31 20:43:41,536 INFO L226 Difference]: Without dead ends: 2124 [2022-01-31 20:43:41,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1565 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=819, Invalid=5187, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 20:43:41,537 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 442 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 2108 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 2392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 2108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:43:41,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 124 Invalid, 2392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 2108 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 20:43:41,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2124 states. [2022-01-31 20:43:44,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2124 to 1837. [2022-01-31 20:43:44,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1837 states, 1722 states have (on average 1.210801393728223) internal successors, (2085), 1771 states have internal predecessors, (2085), 81 states have call successors, (81), 34 states have call predecessors, (81), 33 states have return successors, (79), 31 states have call predecessors, (79), 79 states have call successors, (79) [2022-01-31 20:43:44,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1837 states to 1837 states and 2245 transitions. [2022-01-31 20:43:44,962 INFO L78 Accepts]: Start accepts. Automaton has 1837 states and 2245 transitions. Word has length 73 [2022-01-31 20:43:44,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:43:44,962 INFO L470 AbstractCegarLoop]: Abstraction has 1837 states and 2245 transitions. [2022-01-31 20:43:44,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:43:44,962 INFO L276 IsEmpty]: Start isEmpty. Operand 1837 states and 2245 transitions. [2022-01-31 20:43:44,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 20:43:44,964 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:43:44,964 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:43:44,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2022-01-31 20:43:44,964 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:43:44,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:43:44,964 INFO L85 PathProgramCache]: Analyzing trace with hash 218298293, now seen corresponding path program 24 times [2022-01-31 20:43:44,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:43:44,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1197307798] [2022-01-31 20:43:44,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:43:44,965 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:43:44,965 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:43:44,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:43:44,967 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:43:44,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:43:45,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:43:45,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:43:45,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 20:43:45,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:43:45,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 20:43:45,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:43:45,664 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 20:43:45,664 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:43:45,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1197307798] [2022-01-31 20:43:45,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1197307798] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:43:45,664 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:43:45,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 20:43:45,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618209089] [2022-01-31 20:43:45,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:43:45,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 20:43:45,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:43:45,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 20:43:45,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 20:43:45,665 INFO L87 Difference]: Start difference. First operand 1837 states and 2245 transitions. Second operand has 33 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 states have internal predecessors, (63), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:43:51,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:43:51,928 INFO L93 Difference]: Finished difference Result 1973 states and 2410 transitions. [2022-01-31 20:43:51,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 20:43:51,928 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 states have internal predecessors, (63), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 74 [2022-01-31 20:43:51,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:43:51,931 INFO L225 Difference]: With dead ends: 1973 [2022-01-31 20:43:51,931 INFO L226 Difference]: Without dead ends: 1971 [2022-01-31 20:43:51,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1643 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=868, Invalid=4832, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 20:43:51,931 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 315 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 1514 mSolverCounterSat, 305 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 305 IncrementalHoareTripleChecker+Valid, 1514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 20:43:51,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 92 Invalid, 1819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [305 Valid, 1514 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 20:43:51,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2022-01-31 20:43:55,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 1880. [2022-01-31 20:43:55,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1880 states, 1761 states have (on average 1.2095400340715503) internal successors, (2130), 1813 states have internal predecessors, (2130), 85 states have call successors, (85), 34 states have call predecessors, (85), 33 states have return successors, (83), 32 states have call predecessors, (83), 83 states have call successors, (83) [2022-01-31 20:43:55,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1880 states to 1880 states and 2298 transitions. [2022-01-31 20:43:55,533 INFO L78 Accepts]: Start accepts. Automaton has 1880 states and 2298 transitions. Word has length 74 [2022-01-31 20:43:55,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:43:55,534 INFO L470 AbstractCegarLoop]: Abstraction has 1880 states and 2298 transitions. [2022-01-31 20:43:55,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 states have internal predecessors, (63), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:43:55,534 INFO L276 IsEmpty]: Start isEmpty. Operand 1880 states and 2298 transitions. [2022-01-31 20:43:55,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 20:43:55,535 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:43:55,536 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:43:55,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2022-01-31 20:43:55,536 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:43:55,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:43:55,536 INFO L85 PathProgramCache]: Analyzing trace with hash 231121153, now seen corresponding path program 25 times [2022-01-31 20:43:55,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:43:55,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259357907] [2022-01-31 20:43:55,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:43:55,537 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:43:55,537 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:43:55,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:43:55,539 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:43:55,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:43:56,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:43:56,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:43:56,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 20:43:56,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:43:56,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 20:43:56,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:43:56,258 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 20:43:56,258 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:43:56,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259357907] [2022-01-31 20:43:56,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1259357907] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:43:56,258 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:43:56,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 20:43:56,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128997368] [2022-01-31 20:43:56,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:43:56,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 20:43:56,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:43:56,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 20:43:56,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2022-01-31 20:43:56,259 INFO L87 Difference]: Start difference. First operand 1880 states and 2298 transitions. Second operand has 32 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:44:01,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:44:01,925 INFO L93 Difference]: Finished difference Result 1944 states and 2374 transitions. [2022-01-31 20:44:01,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 20:44:01,926 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 74 [2022-01-31 20:44:01,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:44:01,928 INFO L225 Difference]: With dead ends: 1944 [2022-01-31 20:44:01,928 INFO L226 Difference]: Without dead ends: 1942 [2022-01-31 20:44:01,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1375 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=524, Invalid=4446, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 20:44:01,929 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 193 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 2482 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 2585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 2482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:44:01,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 116 Invalid, 2585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 2482 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 20:44:01,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1942 states. [2022-01-31 20:44:05,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1942 to 1905. [2022-01-31 20:44:05,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1905 states, 1784 states have (on average 1.2085201793721974) internal successors, (2156), 1837 states have internal predecessors, (2156), 87 states have call successors, (87), 34 states have call predecessors, (87), 33 states have return successors, (85), 33 states have call predecessors, (85), 85 states have call successors, (85) [2022-01-31 20:44:05,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1905 states to 1905 states and 2328 transitions. [2022-01-31 20:44:05,638 INFO L78 Accepts]: Start accepts. Automaton has 1905 states and 2328 transitions. Word has length 74 [2022-01-31 20:44:05,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:44:05,638 INFO L470 AbstractCegarLoop]: Abstraction has 1905 states and 2328 transitions. [2022-01-31 20:44:05,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:44:05,638 INFO L276 IsEmpty]: Start isEmpty. Operand 1905 states and 2328 transitions. [2022-01-31 20:44:05,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 20:44:05,640 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:44:05,640 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 6, 6, 6, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:44:05,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2022-01-31 20:44:05,640 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:44:05,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:44:05,641 INFO L85 PathProgramCache]: Analyzing trace with hash 726069085, now seen corresponding path program 31 times [2022-01-31 20:44:05,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:44:05,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605675423] [2022-01-31 20:44:05,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:44:05,643 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:44:05,644 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:44:05,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:44:05,646 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:44:05,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:44:05,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:44:05,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:44:05,822 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 20:44:05,822 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:44:05,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605675423] [2022-01-31 20:44:05,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [605675423] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:44:05,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:44:05,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 20:44:05,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856391711] [2022-01-31 20:44:05,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:44:05,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 20:44:05,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:44:05,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 20:44:05,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-01-31 20:44:05,824 INFO L87 Difference]: Start difference. First operand 1905 states and 2328 transitions. Second operand has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:44:13,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:44:13,167 INFO L93 Difference]: Finished difference Result 3477 states and 4334 transitions. [2022-01-31 20:44:13,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 20:44:13,167 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 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 20:44:13,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:44:13,171 INFO L225 Difference]: With dead ends: 3477 [2022-01-31 20:44:13,171 INFO L226 Difference]: Without dead ends: 2951 [2022-01-31 20:44:13,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=252, Invalid=1308, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 20:44:13,174 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 544 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 985 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:44:13,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [544 Valid, 92 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 985 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 20:44:13,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2022-01-31 20:44:17,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 2534. [2022-01-31 20:44:17,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2534 states, 2413 states have (on average 1.2188147534189806) internal successors, (2941), 2466 states have internal predecessors, (2941), 87 states have call successors, (87), 34 states have call predecessors, (87), 33 states have return successors, (85), 33 states have call predecessors, (85), 85 states have call successors, (85) [2022-01-31 20:44:17,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2534 states to 2534 states and 3113 transitions. [2022-01-31 20:44:17,995 INFO L78 Accepts]: Start accepts. Automaton has 2534 states and 3113 transitions. Word has length 72 [2022-01-31 20:44:17,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:44:17,996 INFO L470 AbstractCegarLoop]: Abstraction has 2534 states and 3113 transitions. [2022-01-31 20:44:17,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:44:17,996 INFO L276 IsEmpty]: Start isEmpty. Operand 2534 states and 3113 transitions. [2022-01-31 20:44:17,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 20:44:17,999 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:44:17,999 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:44:18,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2022-01-31 20:44:18,000 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:44:18,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:44:18,000 INFO L85 PathProgramCache]: Analyzing trace with hash -919244112, now seen corresponding path program 32 times [2022-01-31 20:44:18,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:44:18,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2018120545] [2022-01-31 20:44:18,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:44:18,001 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:44:18,002 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:44:18,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:44:18,004 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:44:18,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:44:18,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:44:18,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:44:18,095 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 20:44:18,095 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:44:18,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2018120545] [2022-01-31 20:44:18,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2018120545] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:44:18,095 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:44:18,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 20:44:18,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293275427] [2022-01-31 20:44:18,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:44:18,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 20:44:18,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:44:18,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 20:44:18,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-01-31 20:44:18,096 INFO L87 Difference]: Start difference. First operand 2534 states and 3113 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:44:25,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:44:25,336 INFO L93 Difference]: Finished difference Result 2915 states and 3591 transitions. [2022-01-31 20:44:25,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 20:44:25,337 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 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 20:44:25,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:44:25,340 INFO L225 Difference]: With dead ends: 2915 [2022-01-31 20:44:25,340 INFO L226 Difference]: Without dead ends: 2876 [2022-01-31 20:44:25,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=830, Invalid=1822, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 20:44:25,341 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 264 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:44:25,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 59 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:44:25,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2876 states. [2022-01-31 20:44:31,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2876 to 2535. [2022-01-31 20:44:31,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2535 states, 2414 states have (on average 1.2178956089478046) internal successors, (2940), 2467 states have internal predecessors, (2940), 87 states have call successors, (87), 34 states have call predecessors, (87), 33 states have return successors, (85), 33 states have call predecessors, (85), 85 states have call successors, (85) [2022-01-31 20:44:31,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2535 states to 2535 states and 3112 transitions. [2022-01-31 20:44:31,351 INFO L78 Accepts]: Start accepts. Automaton has 2535 states and 3112 transitions. Word has length 72 [2022-01-31 20:44:31,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:44:31,351 INFO L470 AbstractCegarLoop]: Abstraction has 2535 states and 3112 transitions. [2022-01-31 20:44:31,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:44:31,352 INFO L276 IsEmpty]: Start isEmpty. Operand 2535 states and 3112 transitions. [2022-01-31 20:44:31,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 20:44:31,355 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:44:31,359 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:44:31,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2022-01-31 20:44:31,359 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:44:31,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:44:31,359 INFO L85 PathProgramCache]: Analyzing trace with hash -218179534, now seen corresponding path program 28 times [2022-01-31 20:44:31,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:44:31,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806380833] [2022-01-31 20:44:31,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:44:31,362 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:44:31,362 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:44:31,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:44:31,364 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:44:31,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:44:31,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:44:31,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:44:31,747 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 20:44:31,747 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:44:31,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [806380833] [2022-01-31 20:44:31,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [806380833] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:44:31,747 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:44:31,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 20:44:31,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775999763] [2022-01-31 20:44:31,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:44:31,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 20:44:31,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:44:31,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 20:44:31,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-01-31 20:44:31,748 INFO L87 Difference]: Start difference. First operand 2535 states and 3112 transitions. Second operand has 24 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:44:46,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:44:46,799 INFO L93 Difference]: Finished difference Result 3247 states and 3989 transitions. [2022-01-31 20:44:46,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-01-31 20:44:46,799 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 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 20:44:46,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:44:46,803 INFO L225 Difference]: With dead ends: 3247 [2022-01-31 20:44:46,803 INFO L226 Difference]: Without dead ends: 3245 [2022-01-31 20:44:46,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9846 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2688, Invalid=23072, Unknown=0, NotChecked=0, Total=25760 [2022-01-31 20:44:46,805 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 521 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 3960 mSolverCounterSat, 559 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 4519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 559 IncrementalHoareTripleChecker+Valid, 3960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-31 20:44:46,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [521 Valid, 128 Invalid, 4519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [559 Valid, 3960 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-31 20:44:46,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3245 states. [2022-01-31 20:44:53,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3245 to 2674. [2022-01-31 20:44:53,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2674 states, 2541 states have (on average 1.218417945690673) internal successors, (3096), 2603 states have internal predecessors, (3096), 96 states have call successors, (96), 37 states have call predecessors, (96), 36 states have return successors, (94), 33 states have call predecessors, (94), 94 states have call successors, (94) [2022-01-31 20:44:53,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2674 states to 2674 states and 3286 transitions. [2022-01-31 20:44:53,164 INFO L78 Accepts]: Start accepts. Automaton has 2674 states and 3286 transitions. Word has length 72 [2022-01-31 20:44:53,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:44:53,164 INFO L470 AbstractCegarLoop]: Abstraction has 2674 states and 3286 transitions. [2022-01-31 20:44:53,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:44:53,164 INFO L276 IsEmpty]: Start isEmpty. Operand 2674 states and 3286 transitions. [2022-01-31 20:44:53,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 20:44:53,167 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:44:53,167 INFO L514 BasicCegarLoop]: trace histogram [9, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:44:53,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2022-01-31 20:44:53,168 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:44:53,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:44:53,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1382753881, now seen corresponding path program 26 times [2022-01-31 20:44:53,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:44:53,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [136155647] [2022-01-31 20:44:53,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:44:53,170 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:44:53,170 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:44:53,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:44:53,172 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:44:53,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:44:54,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:44:54,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:44:54,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-01-31 20:44:54,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:44:54,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-01-31 20:44:54,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:44:54,381 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 20:44:54,382 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:44:54,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [136155647] [2022-01-31 20:44:54,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [136155647] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:44:54,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:44:54,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 20:44:54,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747034987] [2022-01-31 20:44:54,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:44:54,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 20:44:54,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:44:54,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 20:44:54,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1402, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 20:44:54,386 INFO L87 Difference]: Start difference. First operand 2674 states and 3286 transitions. Second operand has 40 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:45:03,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:45:03,549 INFO L93 Difference]: Finished difference Result 2713 states and 3327 transitions. [2022-01-31 20:45:03,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 20:45:03,550 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 75 [2022-01-31 20:45:03,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:45:03,555 INFO L225 Difference]: With dead ends: 2713 [2022-01-31 20:45:03,555 INFO L226 Difference]: Without dead ends: 2650 [2022-01-31 20:45:03,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2741 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=834, Invalid=7722, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 20:45:03,558 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 173 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 2395 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 2578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 2395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:45:03,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 94 Invalid, 2578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 2395 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 20:45:03,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2650 states. [2022-01-31 20:45:10,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2650 to 2581. [2022-01-31 20:45:10,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2581 states, 2453 states have (on average 1.2221769262128006) internal successors, (2998), 2514 states have internal predecessors, (2998), 93 states have call successors, (93), 35 states have call predecessors, (93), 34 states have return successors, (92), 31 states have call predecessors, (92), 92 states have call successors, (92) [2022-01-31 20:45:10,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2581 states to 2581 states and 3183 transitions. [2022-01-31 20:45:10,288 INFO L78 Accepts]: Start accepts. Automaton has 2581 states and 3183 transitions. Word has length 75 [2022-01-31 20:45:10,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:45:10,288 INFO L470 AbstractCegarLoop]: Abstraction has 2581 states and 3183 transitions. [2022-01-31 20:45:10,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:45:10,289 INFO L276 IsEmpty]: Start isEmpty. Operand 2581 states and 3183 transitions. [2022-01-31 20:45:10,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 20:45:10,294 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:45:10,294 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:45:10,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2022-01-31 20:45:10,296 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:45:10,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:45:10,296 INFO L85 PathProgramCache]: Analyzing trace with hash 139638767, now seen corresponding path program 26 times [2022-01-31 20:45:10,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:45:10,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [462698263] [2022-01-31 20:45:10,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:45:10,297 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:45:10,298 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:45:10,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:45:10,300 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:45:10,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:45:10,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:45:10,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:45:10,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 20:45:10,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:45:10,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 20:45:10,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:45:10,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 20:45:10,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:45:10,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:45:10,716 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:45:10,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [462698263] [2022-01-31 20:45:10,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [462698263] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:45:10,716 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:45:10,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 20:45:10,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512279280] [2022-01-31 20:45:10,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:45:10,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 20:45:10,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:45:10,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 20:45:10,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-01-31 20:45:10,718 INFO L87 Difference]: Start difference. First operand 2581 states and 3183 transitions. Second operand has 21 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 20:45:18,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:45:18,157 INFO L93 Difference]: Finished difference Result 2692 states and 3319 transitions. [2022-01-31 20:45:18,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 20:45:18,158 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 76 [2022-01-31 20:45:18,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:45:18,161 INFO L225 Difference]: With dead ends: 2692 [2022-01-31 20:45:18,161 INFO L226 Difference]: Without dead ends: 2690 [2022-01-31 20:45:18,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=228, Invalid=1578, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 20:45:18,162 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 180 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1321 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 1397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:45:18,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 103 Invalid, 1397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1321 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 20:45:18,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2690 states. [2022-01-31 20:45:23,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2690 to 2617. [2022-01-31 20:45:23,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2617 states, 2485 states have (on average 1.2217303822937626) internal successors, (3036), 2549 states have internal predecessors, (3036), 97 states have call successors, (97), 35 states have call predecessors, (97), 34 states have return successors, (96), 32 states have call predecessors, (96), 96 states have call successors, (96) [2022-01-31 20:45:23,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2617 states to 2617 states and 3229 transitions. [2022-01-31 20:45:23,497 INFO L78 Accepts]: Start accepts. Automaton has 2617 states and 3229 transitions. Word has length 76 [2022-01-31 20:45:23,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:45:23,497 INFO L470 AbstractCegarLoop]: Abstraction has 2617 states and 3229 transitions. [2022-01-31 20:45:23,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 20:45:23,497 INFO L276 IsEmpty]: Start isEmpty. Operand 2617 states and 3229 transitions. [2022-01-31 20:45:23,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 20:45:23,501 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:45:23,501 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:45:23,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2022-01-31 20:45:23,502 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:45:23,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:45:23,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1192708310, now seen corresponding path program 27 times [2022-01-31 20:45:23,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:45:23,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [793239872] [2022-01-31 20:45:23,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:45:23,503 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:45:23,503 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:45:23,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:45:23,506 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:45:23,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:45:24,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:45:24,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:45:24,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 20:45:24,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:45:24,006 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 20:45:24,006 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:45:24,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [793239872] [2022-01-31 20:45:24,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [793239872] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:45:24,006 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:45:24,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 20:45:24,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130897615] [2022-01-31 20:45:24,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:45:24,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 20:45:24,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:45:24,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 20:45:24,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=638, Unknown=0, NotChecked=0, Total=702 [2022-01-31 20:45:24,007 INFO L87 Difference]: Start difference. First operand 2617 states and 3229 transitions. Second operand has 27 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:45:36,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:45:36,179 INFO L93 Difference]: Finished difference Result 3201 states and 3947 transitions. [2022-01-31 20:45:36,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-31 20:45:36,179 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 74 [2022-01-31 20:45:36,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:45:36,183 INFO L225 Difference]: With dead ends: 3201 [2022-01-31 20:45:36,183 INFO L226 Difference]: Without dead ends: 3199 [2022-01-31 20:45:36,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 13 SyntacticMatches, 6 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3742 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=845, Invalid=10285, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 20:45:36,184 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 461 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 3617 mSolverCounterSat, 388 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 4005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 388 IncrementalHoareTripleChecker+Valid, 3617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:45:36,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [462 Valid, 152 Invalid, 4005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [388 Valid, 3617 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 20:45:36,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3199 states. [2022-01-31 20:45:42,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3199 to 2687. [2022-01-31 20:45:42,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2687 states, 2549 states have (on average 1.2216555511965477) internal successors, (3114), 2615 states have internal predecessors, (3114), 101 states have call successors, (101), 37 states have call predecessors, (101), 36 states have return successors, (100), 34 states have call predecessors, (100), 100 states have call successors, (100) [2022-01-31 20:45:42,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2687 states to 2687 states and 3315 transitions. [2022-01-31 20:45:42,374 INFO L78 Accepts]: Start accepts. Automaton has 2687 states and 3315 transitions. Word has length 74 [2022-01-31 20:45:42,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:45:42,375 INFO L470 AbstractCegarLoop]: Abstraction has 2687 states and 3315 transitions. [2022-01-31 20:45:42,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:45:42,375 INFO L276 IsEmpty]: Start isEmpty. Operand 2687 states and 3315 transitions. [2022-01-31 20:45:42,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 20:45:42,377 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:45:42,377 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:45:42,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2022-01-31 20:45:42,377 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:45:42,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:45:42,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1837502160, now seen corresponding path program 28 times [2022-01-31 20:45:42,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:45:42,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2041428874] [2022-01-31 20:45:42,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:45:42,379 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:45:42,379 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:45:42,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:45:42,382 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:45:42,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:45:42,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:45:42,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:45:42,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 20:45:42,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:45:42,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:45:42,840 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:45:42,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2041428874] [2022-01-31 20:45:42,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2041428874] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:45:42,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:45:42,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 20:45:42,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000627536] [2022-01-31 20:45:42,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:45:42,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 20:45:42,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:45:42,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 20:45:42,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2022-01-31 20:45:42,841 INFO L87 Difference]: Start difference. First operand 2687 states and 3315 transitions. Second operand has 28 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:45:54,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:45:54,231 INFO L93 Difference]: Finished difference Result 3014 states and 3711 transitions. [2022-01-31 20:45:54,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 20:45:54,231 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 74 [2022-01-31 20:45:54,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:45:54,235 INFO L225 Difference]: With dead ends: 3014 [2022-01-31 20:45:54,235 INFO L226 Difference]: Without dead ends: 3012 [2022-01-31 20:45:54,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2688 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1074, Invalid=8432, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 20:45:54,236 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 370 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 3254 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 3536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 3254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:45:54,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 145 Invalid, 3536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 3254 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 20:45:54,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3012 states. [2022-01-31 20:45:59,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3012 to 2739. [2022-01-31 20:45:59,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2739 states, 2595 states have (on average 1.2215799614643545) internal successors, (3170), 2665 states have internal predecessors, (3170), 105 states have call successors, (105), 39 states have call predecessors, (105), 38 states have return successors, (104), 34 states have call predecessors, (104), 104 states have call successors, (104) [2022-01-31 20:45:59,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2739 states to 2739 states and 3379 transitions. [2022-01-31 20:45:59,585 INFO L78 Accepts]: Start accepts. Automaton has 2739 states and 3379 transitions. Word has length 74 [2022-01-31 20:45:59,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:45:59,585 INFO L470 AbstractCegarLoop]: Abstraction has 2739 states and 3379 transitions. [2022-01-31 20:45:59,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:45:59,585 INFO L276 IsEmpty]: Start isEmpty. Operand 2739 states and 3379 transitions. [2022-01-31 20:45:59,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 20:45:59,588 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:45:59,588 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:45:59,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2022-01-31 20:45:59,588 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:45:59,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:45:59,588 INFO L85 PathProgramCache]: Analyzing trace with hash -344034646, now seen corresponding path program 29 times [2022-01-31 20:45:59,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:45:59,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [969114266] [2022-01-31 20:45:59,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:45:59,589 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:45:59,589 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:45:59,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:45:59,591 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:45:59,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:46:00,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:46:00,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:46:00,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 20:46:00,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:46:00,175 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 20:46:00,175 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:46:00,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [969114266] [2022-01-31 20:46:00,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [969114266] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:46:00,175 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:46:00,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 20:46:00,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372122386] [2022-01-31 20:46:00,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:46:00,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 20:46:00,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:46:00,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 20:46:00,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2022-01-31 20:46:00,176 INFO L87 Difference]: Start difference. First operand 2739 states and 3379 transitions. Second operand has 29 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:46:09,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:46:09,396 INFO L93 Difference]: Finished difference Result 2945 states and 3626 transitions. [2022-01-31 20:46:09,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 20:46:09,397 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 74 [2022-01-31 20:46:09,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:46:09,400 INFO L225 Difference]: With dead ends: 2945 [2022-01-31 20:46:09,400 INFO L226 Difference]: Without dead ends: 2943 [2022-01-31 20:46:09,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2026 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=841, Invalid=6815, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 20:46:09,401 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 457 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 2296 mSolverCounterSat, 338 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 2634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 338 IncrementalHoareTripleChecker+Valid, 2296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:46:09,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [458 Valid, 115 Invalid, 2634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [338 Valid, 2296 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 20:46:09,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2943 states. [2022-01-31 20:46:14,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2943 to 2747. [2022-01-31 20:46:14,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2747 states, 2604 states have (on average 1.2223502304147464) internal successors, (3183), 2674 states have internal predecessors, (3183), 104 states have call successors, (104), 39 states have call predecessors, (104), 38 states have return successors, (103), 33 states have call predecessors, (103), 103 states have call successors, (103) [2022-01-31 20:46:14,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2747 states to 2747 states and 3390 transitions. [2022-01-31 20:46:14,947 INFO L78 Accepts]: Start accepts. Automaton has 2747 states and 3390 transitions. Word has length 74 [2022-01-31 20:46:14,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:46:14,947 INFO L470 AbstractCegarLoop]: Abstraction has 2747 states and 3390 transitions. [2022-01-31 20:46:14,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:46:14,947 INFO L276 IsEmpty]: Start isEmpty. Operand 2747 states and 3390 transitions. [2022-01-31 20:46:14,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 20:46:14,950 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:46:14,950 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:46:14,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2022-01-31 20:46:14,950 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:46:14,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:46:14,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1614776572, now seen corresponding path program 30 times [2022-01-31 20:46:14,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:46:14,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [540242513] [2022-01-31 20:46:14,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:46:14,951 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:46:14,951 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:46:14,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:46:14,953 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:46:14,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:46:15,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:46:15,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:46:15,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 20:46:15,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:46:15,495 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 20:46:15,495 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:46:15,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [540242513] [2022-01-31 20:46:15,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [540242513] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:46:15,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:46:15,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 20:46:15,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545034217] [2022-01-31 20:46:15,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:46:15,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 20:46:15,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:46:15,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 20:46:15,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2022-01-31 20:46:15,496 INFO L87 Difference]: Start difference. First operand 2747 states and 3390 transitions. Second operand has 30 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:46:23,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:46:23,827 INFO L93 Difference]: Finished difference Result 2940 states and 3619 transitions. [2022-01-31 20:46:23,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 20:46:23,828 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 74 [2022-01-31 20:46:23,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:46:23,831 INFO L225 Difference]: With dead ends: 2940 [2022-01-31 20:46:23,831 INFO L226 Difference]: Without dead ends: 2938 [2022-01-31 20:46:23,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1789 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=496, Invalid=5510, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 20:46:23,832 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 280 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 2871 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 3040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 2871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:46:23,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 134 Invalid, 3040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 2871 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 20:46:23,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2938 states. [2022-01-31 20:46:29,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2938 to 2747. [2022-01-31 20:46:29,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2747 states, 2605 states have (on average 1.2230326295585412) internal successors, (3186), 2674 states have internal predecessors, (3186), 103 states have call successors, (103), 39 states have call predecessors, (103), 38 states have return successors, (102), 33 states have call predecessors, (102), 102 states have call successors, (102) [2022-01-31 20:46:29,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2747 states to 2747 states and 3391 transitions. [2022-01-31 20:46:29,274 INFO L78 Accepts]: Start accepts. Automaton has 2747 states and 3391 transitions. Word has length 74 [2022-01-31 20:46:29,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:46:29,274 INFO L470 AbstractCegarLoop]: Abstraction has 2747 states and 3391 transitions. [2022-01-31 20:46:29,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:46:29,275 INFO L276 IsEmpty]: Start isEmpty. Operand 2747 states and 3391 transitions. [2022-01-31 20:46:29,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 20:46:29,277 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:46:29,277 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 6, 6, 5, 5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:46:29,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2022-01-31 20:46:29,277 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:46:29,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:46:29,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1089485352, now seen corresponding path program 27 times [2022-01-31 20:46:29,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:46:29,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [993220732] [2022-01-31 20:46:29,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:46:29,278 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:46:29,278 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:46:29,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:46:29,281 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:46:29,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:46:30,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:46:30,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:46:30,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 20:46:30,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:46:30,258 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 20:46:30,259 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:46:30,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [993220732] [2022-01-31 20:46:30,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [993220732] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:46:30,259 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:46:30,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 20:46:30,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358881012] [2022-01-31 20:46:30,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:46:30,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 20:46:30,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:46:30,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 20:46:30,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1252, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 20:46:30,260 INFO L87 Difference]: Start difference. First operand 2747 states and 3391 transitions. Second operand has 38 states, 37 states have (on average 1.837837837837838) internal successors, (68), 36 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:46:41,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:46:41,394 INFO L93 Difference]: Finished difference Result 3094 states and 3813 transitions. [2022-01-31 20:46:41,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-31 20:46:41,395 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.837837837837838) internal successors, (68), 36 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 74 [2022-01-31 20:46:41,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:46:41,399 INFO L225 Difference]: With dead ends: 3094 [2022-01-31 20:46:41,399 INFO L226 Difference]: Without dead ends: 3092 [2022-01-31 20:46:41,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4280 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1287, Invalid=12285, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 20:46:41,400 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 403 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 3075 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 3432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 3075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:46:41,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [403 Valid, 114 Invalid, 3432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 3075 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 20:46:41,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3092 states. [2022-01-31 20:46:46,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3092 to 2762. [2022-01-31 20:46:46,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2762 states, 2619 states have (on average 1.2229858724704086) internal successors, (3203), 2689 states have internal predecessors, (3203), 104 states have call successors, (104), 39 states have call predecessors, (104), 38 states have return successors, (103), 33 states have call predecessors, (103), 103 states have call successors, (103) [2022-01-31 20:46:46,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2762 states to 2762 states and 3410 transitions. [2022-01-31 20:46:46,886 INFO L78 Accepts]: Start accepts. Automaton has 2762 states and 3410 transitions. Word has length 74 [2022-01-31 20:46:46,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:46:46,886 INFO L470 AbstractCegarLoop]: Abstraction has 2762 states and 3410 transitions. [2022-01-31 20:46:46,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.837837837837838) internal successors, (68), 36 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:46:46,886 INFO L276 IsEmpty]: Start isEmpty. Operand 2762 states and 3410 transitions. [2022-01-31 20:46:46,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 20:46:46,889 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:46:46,889 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 6, 6, 5, 5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:46:46,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2022-01-31 20:46:46,889 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:46:46,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:46:46,889 INFO L85 PathProgramCache]: Analyzing trace with hash 267447918, now seen corresponding path program 28 times [2022-01-31 20:46:46,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:46:46,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1965569176] [2022-01-31 20:46:46,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:46:46,890 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:46:46,890 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:46:46,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:46:46,893 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:46:46,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:46:47,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:46:47,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:46:47,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 20:46:47,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:46:47,878 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 20:46:47,879 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:46:47,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1965569176] [2022-01-31 20:46:47,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1965569176] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:46:47,879 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:46:47,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 20:46:47,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771078786] [2022-01-31 20:46:47,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:46:47,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 20:46:47,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:46:47,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 20:46:47,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1251, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 20:46:47,880 INFO L87 Difference]: Start difference. First operand 2762 states and 3410 transitions. Second operand has 38 states, 37 states have (on average 1.837837837837838) internal successors, (68), 36 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:46:56,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:46:56,974 INFO L93 Difference]: Finished difference Result 2953 states and 3637 transitions. [2022-01-31 20:46:56,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 20:46:56,975 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.837837837837838) internal successors, (68), 36 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 74 [2022-01-31 20:46:56,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:46:56,978 INFO L225 Difference]: With dead ends: 2953 [2022-01-31 20:46:56,978 INFO L226 Difference]: Without dead ends: 2951 [2022-01-31 20:46:56,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2636 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=825, Invalid=7731, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 20:46:56,979 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 343 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 2642 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 2891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 2642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:46:56,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 120 Invalid, 2891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 2642 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 20:46:56,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2022-01-31 20:47:02,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 2720. [2022-01-31 20:47:02,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2720 states, 2590 states have (on average 1.227027027027027) internal successors, (3178), 2653 states have internal predecessors, (3178), 94 states have call successors, (94), 36 states have call predecessors, (94), 35 states have return successors, (93), 30 states have call predecessors, (93), 93 states have call successors, (93) [2022-01-31 20:47:02,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2720 states to 2720 states and 3365 transitions. [2022-01-31 20:47:02,352 INFO L78 Accepts]: Start accepts. Automaton has 2720 states and 3365 transitions. Word has length 74 [2022-01-31 20:47:02,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:47:02,353 INFO L470 AbstractCegarLoop]: Abstraction has 2720 states and 3365 transitions. [2022-01-31 20:47:02,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.837837837837838) internal successors, (68), 36 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:47:02,353 INFO L276 IsEmpty]: Start isEmpty. Operand 2720 states and 3365 transitions. [2022-01-31 20:47:02,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 20:47:02,355 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:47:02,355 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 6, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:47:02,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2022-01-31 20:47:02,355 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:47:02,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:47:02,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1570581088, now seen corresponding path program 29 times [2022-01-31 20:47:02,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:47:02,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [706208434] [2022-01-31 20:47:02,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:47:02,357 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:47:02,357 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:47:02,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:47:02,359 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:47:02,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:47:03,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:47:03,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:47:03,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-01-31 20:47:03,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:47:03,408 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 20:47:03,408 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:47:03,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [706208434] [2022-01-31 20:47:03,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [706208434] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:47:03,409 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:47:03,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 20:47:03,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060513460] [2022-01-31 20:47:03,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:47:03,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 20:47:03,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:47:03,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 20:47:03,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1127, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 20:47:03,409 INFO L87 Difference]: Start difference. First operand 2720 states and 3365 transitions. Second operand has 36 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 34 states have internal predecessors, (69), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:47:12,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:47:12,553 INFO L93 Difference]: Finished difference Result 2885 states and 3561 transitions. [2022-01-31 20:47:12,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 20:47:12,553 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 34 states have internal predecessors, (69), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 75 [2022-01-31 20:47:12,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:47:12,557 INFO L225 Difference]: With dead ends: 2885 [2022-01-31 20:47:12,557 INFO L226 Difference]: Without dead ends: 2883 [2022-01-31 20:47:12,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3181 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=917, Invalid=9385, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 20:47:12,558 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 285 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 3202 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 3489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 3202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:47:12,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 89 Invalid, 3489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 3202 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 20:47:12,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2883 states. [2022-01-31 20:47:17,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2883 to 2748. [2022-01-31 20:47:18,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2748 states, 2617 states have (on average 1.226595338173481) internal successors, (3210), 2680 states have internal predecessors, (3210), 94 states have call successors, (94), 37 states have call predecessors, (94), 36 states have return successors, (93), 30 states have call predecessors, (93), 93 states have call successors, (93) [2022-01-31 20:47:18,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2748 states to 2748 states and 3397 transitions. [2022-01-31 20:47:18,004 INFO L78 Accepts]: Start accepts. Automaton has 2748 states and 3397 transitions. Word has length 75 [2022-01-31 20:47:18,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:47:18,004 INFO L470 AbstractCegarLoop]: Abstraction has 2748 states and 3397 transitions. [2022-01-31 20:47:18,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 34 states have internal predecessors, (69), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:47:18,004 INFO L276 IsEmpty]: Start isEmpty. Operand 2748 states and 3397 transitions. [2022-01-31 20:47:18,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 20:47:18,007 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:47:18,007 INFO L514 BasicCegarLoop]: trace histogram [10, 8, 6, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:47:18,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2022-01-31 20:47:18,007 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:47:18,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:47:18,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1589949918, now seen corresponding path program 30 times [2022-01-31 20:47:18,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:47:18,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [404591093] [2022-01-31 20:47:18,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:47:18,008 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:47:18,008 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:47:18,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:47:18,011 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:47:18,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:47:19,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:47:19,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:47:19,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-01-31 20:47:19,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:47:19,093 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 20:47:19,093 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:47:19,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [404591093] [2022-01-31 20:47:19,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [404591093] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:47:19,094 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:47:19,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 20:47:19,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627054434] [2022-01-31 20:47:19,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:47:19,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 20:47:19,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:47:19,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 20:47:19,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1188, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 20:47:19,094 INFO L87 Difference]: Start difference. First operand 2748 states and 3397 transitions. Second operand has 38 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:47:29,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:47:29,706 INFO L93 Difference]: Finished difference Result 2934 states and 3623 transitions. [2022-01-31 20:47:29,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 20:47:29,707 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 75 [2022-01-31 20:47:29,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:47:29,710 INFO L225 Difference]: With dead ends: 2934 [2022-01-31 20:47:29,710 INFO L226 Difference]: Without dead ends: 2932 [2022-01-31 20:47:29,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3807 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1493, Invalid=10939, Unknown=0, NotChecked=0, Total=12432 [2022-01-31 20:47:29,711 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 281 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 3651 mSolverCounterSat, 316 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 3967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 316 IncrementalHoareTripleChecker+Valid, 3651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 20:47:29,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 100 Invalid, 3967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [316 Valid, 3651 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 20:47:29,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2932 states. [2022-01-31 20:47:35,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2932 to 2741. [2022-01-31 20:47:35,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2741 states, 2612 states have (on average 1.2274119448698315) internal successors, (3206), 2674 states have internal predecessors, (3206), 92 states have call successors, (92), 37 states have call predecessors, (92), 36 states have return successors, (91), 29 states have call predecessors, (91), 91 states have call successors, (91) [2022-01-31 20:47:35,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2741 states to 2741 states and 3389 transitions. [2022-01-31 20:47:35,154 INFO L78 Accepts]: Start accepts. Automaton has 2741 states and 3389 transitions. Word has length 75 [2022-01-31 20:47:35,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:47:35,155 INFO L470 AbstractCegarLoop]: Abstraction has 2741 states and 3389 transitions. [2022-01-31 20:47:35,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:47:35,155 INFO L276 IsEmpty]: Start isEmpty. Operand 2741 states and 3389 transitions. [2022-01-31 20:47:35,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 20:47:35,157 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:47:35,157 INFO L514 BasicCegarLoop]: trace histogram [10, 8, 6, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:47:35,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2022-01-31 20:47:35,157 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:47:35,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:47:35,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1924650392, now seen corresponding path program 31 times [2022-01-31 20:47:35,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:47:35,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [531153895] [2022-01-31 20:47:35,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:47:35,159 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:47:35,159 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:47:35,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:47:35,161 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:47:35,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:47:36,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:47:36,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:47:36,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-01-31 20:47:36,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:47:36,130 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 20:47:36,131 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:47:36,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [531153895] [2022-01-31 20:47:36,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [531153895] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:47:36,131 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:47:36,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 20:47:36,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970557402] [2022-01-31 20:47:36,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:47:36,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 20:47:36,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:47:36,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 20:47:36,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 20:47:36,132 INFO L87 Difference]: Start difference. First operand 2741 states and 3389 transitions. Second operand has 36 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 34 states have internal predecessors, (69), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:47:44,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:47:44,136 INFO L93 Difference]: Finished difference Result 2828 states and 3496 transitions. [2022-01-31 20:47:44,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 20:47:44,136 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 34 states have internal predecessors, (69), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 75 [2022-01-31 20:47:44,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:47:44,139 INFO L225 Difference]: With dead ends: 2828 [2022-01-31 20:47:44,139 INFO L226 Difference]: Without dead ends: 2826 [2022-01-31 20:47:44,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2242 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=690, Invalid=6282, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 20:47:44,140 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 235 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 2454 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 2635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 2454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:47:44,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 65 Invalid, 2635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 2454 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 20:47:44,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2826 states. [2022-01-31 20:47:49,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2826 to 2706. [2022-01-31 20:47:49,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2706 states, 2581 states have (on average 1.228206121658272) internal successors, (3170), 2641 states have internal predecessors, (3170), 89 states have call successors, (89), 36 states have call predecessors, (89), 35 states have return successors, (88), 28 states have call predecessors, (88), 88 states have call successors, (88) [2022-01-31 20:47:49,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2706 states to 2706 states and 3347 transitions. [2022-01-31 20:47:49,497 INFO L78 Accepts]: Start accepts. Automaton has 2706 states and 3347 transitions. Word has length 75 [2022-01-31 20:47:49,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:47:49,498 INFO L470 AbstractCegarLoop]: Abstraction has 2706 states and 3347 transitions. [2022-01-31 20:47:49,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 34 states have internal predecessors, (69), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:47:49,498 INFO L276 IsEmpty]: Start isEmpty. Operand 2706 states and 3347 transitions. [2022-01-31 20:47:49,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 20:47:49,500 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:47:49,500 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:47:49,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2022-01-31 20:47:49,500 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:47:49,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:47:49,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1231018404, now seen corresponding path program 31 times [2022-01-31 20:47:49,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:47:49,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [390275543] [2022-01-31 20:47:49,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:47:49,502 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:47:49,502 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:47:49,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:47:49,504 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:47:49,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:47:50,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:47:50,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:47:50,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 20:47:50,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:47:50,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 20:47:50,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:47:50,015 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 20:47:50,016 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:47:50,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [390275543] [2022-01-31 20:47:50,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [390275543] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:47:50,016 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:47:50,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 20:47:50,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282753952] [2022-01-31 20:47:50,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:47:50,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 20:47:50,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:47:50,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 20:47:50,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-01-31 20:47:50,016 INFO L87 Difference]: Start difference. First operand 2706 states and 3347 transitions. Second operand has 25 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:47:57,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:47:57,641 INFO L93 Difference]: Finished difference Result 2904 states and 3587 transitions. [2022-01-31 20:47:57,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 20:47:57,642 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 76 [2022-01-31 20:47:57,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:47:57,646 INFO L225 Difference]: With dead ends: 2904 [2022-01-31 20:47:57,646 INFO L226 Difference]: Without dead ends: 2902 [2022-01-31 20:47:57,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=406, Invalid=3016, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 20:47:57,647 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 244 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1491 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 20:47:57,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 84 Invalid, 1631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1491 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 20:47:57,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2902 states. [2022-01-31 20:48:03,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2902 to 2790. [2022-01-31 20:48:03,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2790 states, 2652 states have (on average 1.2254901960784315) internal successors, (3250), 2719 states have internal predecessors, (3250), 101 states have call successors, (101), 37 states have call predecessors, (101), 36 states have return successors, (100), 33 states have call predecessors, (100), 100 states have call successors, (100) [2022-01-31 20:48:03,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2790 states to 2790 states and 3451 transitions. [2022-01-31 20:48:03,456 INFO L78 Accepts]: Start accepts. Automaton has 2790 states and 3451 transitions. Word has length 76 [2022-01-31 20:48:03,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:48:03,456 INFO L470 AbstractCegarLoop]: Abstraction has 2790 states and 3451 transitions. [2022-01-31 20:48:03,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:48:03,456 INFO L276 IsEmpty]: Start isEmpty. Operand 2790 states and 3451 transitions. [2022-01-31 20:48:03,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 20:48:03,459 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:48:03,459 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:48:03,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2022-01-31 20:48:03,459 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:48:03,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:48:03,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1054677014, now seen corresponding path program 32 times [2022-01-31 20:48:03,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:48:03,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1474028257] [2022-01-31 20:48:03,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:48:03,460 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:48:03,460 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:48:03,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:48:03,462 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:48:03,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:03,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:48:03,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:03,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 20:48:03,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:03,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 20:48:03,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:03,901 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 20:48:03,901 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:48:03,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1474028257] [2022-01-31 20:48:03,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1474028257] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:48:03,902 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:48:03,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 20:48:03,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026040464] [2022-01-31 20:48:03,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:48:03,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 20:48:03,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:48:03,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 20:48:03,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2022-01-31 20:48:03,903 INFO L87 Difference]: Start difference. First operand 2790 states and 3451 transitions. Second operand has 25 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3)