/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/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loop-acceleration/nested_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 03:00:49,825 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 03:00:49,827 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 03:00:49,870 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-24 03:00:49,886 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-24 03:00:49,886 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-24 03:00:49,887 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-24 03:00:49,888 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-24 03:00:49,889 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-24 03:00:49,889 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-24 03:00:49,890 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-24 03:00:49,892 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-24 03:00:49,893 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-24 03:00:49,897 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-24 03:00:49,897 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-24 03:00:49,898 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-24 03:00:49,900 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-24 03:00:49,906 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-24 03:00:49,907 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-24 03:00:49,911 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-24 03:00:49,913 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-02-24 03:00:49,923 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 03:00:49,923 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 03:00:49,925 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 03:00:49,925 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 03:00:49,925 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 03:00:49,925 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 03:00:49,925 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 03:00:49,926 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 03:00:49,926 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 03:00:49,926 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 03:00:49,926 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 03:00:49,927 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 03:00:49,927 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 03:00:49,927 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-24 03:00:49,927 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 03:00:49,927 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 03:00:49,927 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 03:00:49,927 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-24 03:00:49,927 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 03:00:49,928 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-24 03:00:49,928 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 03:00:50,127 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 03:00:50,147 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 03:00:50,150 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 03:00:50,152 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 03:00:50,152 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 03:00:50,153 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/nested_1-2.c [2022-02-24 03:00:50,237 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6bdf6fd0d/51a60779e2d949e480b37aba99f68ed3/FLAG366ba64d5 [2022-02-24 03:00:50,575 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 03:00:50,575 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/nested_1-2.c [2022-02-24 03:00:50,584 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6bdf6fd0d/51a60779e2d949e480b37aba99f68ed3/FLAG366ba64d5 [2022-02-24 03:00:51,012 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6bdf6fd0d/51a60779e2d949e480b37aba99f68ed3 [2022-02-24 03:00:51,015 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 03:00:51,016 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-24 03:00:51,019 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 03:00:51,019 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 03:00:51,023 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 03:00:51,023 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 03:00:51" (1/1) ... [2022-02-24 03:00:51,024 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65dc967c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:00:51, skipping insertion in model container [2022-02-24 03:00:51,024 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 03:00:51" (1/1) ... [2022-02-24 03:00:51,033 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 03:00:51,044 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 03:00:51,256 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/nested_1-2.c[322,335] [2022-02-24 03:00:51,271 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 03:00:51,280 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 03:00:51,291 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/nested_1-2.c[322,335] [2022-02-24 03:00:51,299 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 03:00:51,310 INFO L208 MainTranslator]: Completed translation [2022-02-24 03:00:51,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:00:51 WrapperNode [2022-02-24 03:00:51,311 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 03:00:51,311 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 03:00:51,312 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 03:00:51,312 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 03:00:51,322 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:00:51" (1/1) ... [2022-02-24 03:00:51,323 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:00:51" (1/1) ... [2022-02-24 03:00:51,330 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:00:51" (1/1) ... [2022-02-24 03:00:51,330 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:00:51" (1/1) ... [2022-02-24 03:00:51,339 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:00:51" (1/1) ... [2022-02-24 03:00:51,343 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:00:51" (1/1) ... [2022-02-24 03:00:51,344 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:00:51" (1/1) ... [2022-02-24 03:00:51,349 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 03:00:51,350 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 03:00:51,350 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 03:00:51,352 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 03:00:51,352 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:00:51" (1/1) ... [2022-02-24 03:00:51,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 03:00:51,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 03:00:51,380 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-24 03:00:51,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-24 03:00:51,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 03:00:51,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 03:00:51,428 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 03:00:51,428 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-24 03:00:51,428 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 03:00:51,428 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-24 03:00:51,428 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 03:00:51,428 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 03:00:51,429 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 03:00:51,429 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-24 03:00:51,429 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 03:00:51,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 03:00:51,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 03:00:51,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 03:00:51,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 03:00:51,430 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 03:00:51,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 03:00:51,483 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 03:00:51,485 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 03:00:51,625 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 03:00:51,647 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 03:00:51,647 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-24 03:00:51,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 03:00:51 BoogieIcfgContainer [2022-02-24 03:00:51,649 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 03:00:51,650 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 03:00:51,651 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 03:00:51,653 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 03:00:51,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 03:00:51" (1/3) ... [2022-02-24 03:00:51,654 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1332472d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 03:00:51, skipping insertion in model container [2022-02-24 03:00:51,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:00:51" (2/3) ... [2022-02-24 03:00:51,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1332472d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 03:00:51, skipping insertion in model container [2022-02-24 03:00:51,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 03:00:51" (3/3) ... [2022-02-24 03:00:51,656 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_1-2.c [2022-02-24 03:00:51,660 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-24 03:00:51,660 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 03:00:51,696 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 03:00:51,718 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=QVASR [2022-02-24 03:00:51,719 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 03:00:51,752 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 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) [2022-02-24 03:00:51,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-24 03:00:51,758 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:00:51,759 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:00:51,759 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:00:51,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:00:51,764 INFO L85 PathProgramCache]: Analyzing trace with hash 2021311625, now seen corresponding path program 1 times [2022-02-24 03:00:51,783 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:00:51,783 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1697431815] [2022-02-24 03:00:51,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:00:51,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:00:51,865 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 03:00:51,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:00:52,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:00:52,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:00:52,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:00:52,062 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:00:52,062 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1697431815] [2022-02-24 03:00:52,063 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1697431815] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:00:52,064 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:00:52,064 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 03:00:52,066 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499868010] [2022-02-24 03:00:52,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:00:52,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 03:00:52,071 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:00:52,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 03:00:52,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 03:00:52,102 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 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 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-02-24 03:00:52,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:00:52,155 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2022-02-24 03:00:52,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 03:00:52,157 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 11 [2022-02-24 03:00:52,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:00:52,162 INFO L225 Difference]: With dead ends: 37 [2022-02-24 03:00:52,162 INFO L226 Difference]: Without dead ends: 17 [2022-02-24 03:00:52,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 03:00:52,167 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:00:52,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 27 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 03:00:52,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-02-24 03:00:52,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2022-02-24 03:00:52,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 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) [2022-02-24 03:00:52,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-02-24 03:00:52,196 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2022-02-24 03:00:52,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:00:52,196 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-02-24 03:00:52,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-02-24 03:00:52,197 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-02-24 03:00:52,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-24 03:00:52,197 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:00:52,197 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:00:52,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 03:00:52,198 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:00:52,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:00:52,199 INFO L85 PathProgramCache]: Analyzing trace with hash -2037585725, now seen corresponding path program 1 times [2022-02-24 03:00:52,199 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:00:52,199 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [692891445] [2022-02-24 03:00:52,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:00:52,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:00:52,366 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:00:52,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:00:52,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:00:52,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:00:52,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:00:52,460 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:00:52,461 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [692891445] [2022-02-24 03:00:52,461 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [692891445] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:00:52,461 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:00:52,461 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-24 03:00:52,462 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177267017] [2022-02-24 03:00:52,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:00:52,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-24 03:00:52,463 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:00:52,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-24 03:00:52,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-24 03:00:52,464 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2022-02-24 03:00:52,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:00:52,505 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2022-02-24 03:00:52,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-24 03:00:52,506 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 14 [2022-02-24 03:00:52,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:00:52,507 INFO L225 Difference]: With dead ends: 26 [2022-02-24 03:00:52,507 INFO L226 Difference]: Without dead ends: 18 [2022-02-24 03:00:52,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-24 03:00:52,508 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:00:52,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 19 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 03:00:52,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-02-24 03:00:52,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2022-02-24 03:00:52,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 3 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) [2022-02-24 03:00:52,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-02-24 03:00:52,515 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 14 [2022-02-24 03:00:52,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:00:52,515 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-02-24 03:00:52,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2022-02-24 03:00:52,515 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-02-24 03:00:52,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-24 03:00:52,516 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:00:52,516 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:00:52,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-24 03:00:52,516 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:00:52,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:00:52,517 INFO L85 PathProgramCache]: Analyzing trace with hash -183414982, now seen corresponding path program 1 times [2022-02-24 03:00:52,517 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:00:52,517 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [862069498] [2022-02-24 03:00:52,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:00:52,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:00:52,727 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:00:52,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:00:52,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:00:52,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:00:52,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:00:52,802 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:00:52,802 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [862069498] [2022-02-24 03:00:52,802 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [862069498] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:00:52,803 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:00:52,804 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 03:00:52,804 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305865147] [2022-02-24 03:00:52,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:00:52,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 03:00:52,804 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:00:52,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 03:00:52,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-24 03:00:52,806 INFO L87 Difference]: Start difference. First operand 16 states and 17 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) [2022-02-24 03:00:52,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:00:52,880 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2022-02-24 03:00:52,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 03:00:52,881 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 [2022-02-24 03:00:52,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:00:52,881 INFO L225 Difference]: With dead ends: 27 [2022-02-24 03:00:52,882 INFO L226 Difference]: Without dead ends: 19 [2022-02-24 03:00:52,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-02-24 03:00:52,889 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:00:52,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 29 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 03:00:52,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-02-24 03:00:52,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2022-02-24 03:00:52,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 3 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) [2022-02-24 03:00:52,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2022-02-24 03:00:52,898 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2022-02-24 03:00:52,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:00:52,899 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2022-02-24 03:00:52,900 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) [2022-02-24 03:00:52,900 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-02-24 03:00:52,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-24 03:00:52,900 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:00:52,901 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:00:52,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-24 03:00:52,901 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:00:52,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:00:52,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1461303203, now seen corresponding path program 2 times [2022-02-24 03:00:52,902 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:00:52,902 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1006192999] [2022-02-24 03:00:52,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:00:52,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:00:53,109 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:00:53,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:00:53,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:00:53,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:00:53,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:00:53,210 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:00:53,210 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1006192999] [2022-02-24 03:00:53,210 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1006192999] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:00:53,210 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:00:53,210 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 03:00:53,211 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799585282] [2022-02-24 03:00:53,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:00:53,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 03:00:53,211 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:00:53,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 03:00:53,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-02-24 03:00:53,212 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 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) [2022-02-24 03:00:53,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:00:53,273 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2022-02-24 03:00:53,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 03:00:53,274 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 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 16 [2022-02-24 03:00:53,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:00:53,275 INFO L225 Difference]: With dead ends: 28 [2022-02-24 03:00:53,275 INFO L226 Difference]: Without dead ends: 20 [2022-02-24 03:00:53,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-02-24 03:00:53,276 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:00:53,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 24 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 03:00:53,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-02-24 03:00:53,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2022-02-24 03:00:53,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 3 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) [2022-02-24 03:00:53,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-02-24 03:00:53,280 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2022-02-24 03:00:53,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:00:53,281 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-02-24 03:00:53,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 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) [2022-02-24 03:00:53,281 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-02-24 03:00:53,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-24 03:00:53,281 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:00:53,282 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:00:53,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-24 03:00:53,282 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:00:53,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:00:53,282 INFO L85 PathProgramCache]: Analyzing trace with hash 907959386, now seen corresponding path program 3 times [2022-02-24 03:00:53,283 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:00:53,283 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7712435] [2022-02-24 03:00:53,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:00:53,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:00:53,462 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:00:53,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:00:53,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:00:53,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:00:53,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:00:53,592 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:00:53,592 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7712435] [2022-02-24 03:00:53,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [7712435] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:00:53,593 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:00:53,593 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 03:00:53,593 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170605586] [2022-02-24 03:00:53,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:00:53,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 03:00:53,594 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:00:53,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 03:00:53,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-24 03:00:53,594 INFO L87 Difference]: Start difference. First operand 18 states and 19 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) [2022-02-24 03:00:53,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:00:53,674 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2022-02-24 03:00:53,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 03:00:53,675 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 [2022-02-24 03:00:53,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:00:53,675 INFO L225 Difference]: With dead ends: 29 [2022-02-24 03:00:53,675 INFO L226 Difference]: Without dead ends: 21 [2022-02-24 03:00:53,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-02-24 03:00:53,676 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:00:53,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 24 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 03:00:53,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-02-24 03:00:53,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2022-02-24 03:00:53,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 3 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) [2022-02-24 03:00:53,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2022-02-24 03:00:53,681 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 17 [2022-02-24 03:00:53,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:00:53,681 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2022-02-24 03:00:53,681 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) [2022-02-24 03:00:53,681 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2022-02-24 03:00:53,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-24 03:00:53,682 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:00:53,682 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:00:53,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-24 03:00:53,682 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:00:53,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:00:53,683 INFO L85 PathProgramCache]: Analyzing trace with hash 934170243, now seen corresponding path program 4 times [2022-02-24 03:00:53,683 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:00:53,683 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [902256345] [2022-02-24 03:00:53,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:00:53,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:00:53,831 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:00:53,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:00:53,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:00:53,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:00:53,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:00:53,947 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:00:53,947 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [902256345] [2022-02-24 03:00:53,947 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [902256345] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:00:53,947 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:00:53,947 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 03:00:53,947 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970842581] [2022-02-24 03:00:53,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:00:53,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 03:00:53,949 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:00:53,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 03:00:53,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-02-24 03:00:53,950 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 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) [2022-02-24 03:00:54,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:00:54,067 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2022-02-24 03:00:54,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 03:00:54,067 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 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 18 [2022-02-24 03:00:54,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:00:54,068 INFO L225 Difference]: With dead ends: 30 [2022-02-24 03:00:54,068 INFO L226 Difference]: Without dead ends: 22 [2022-02-24 03:00:54,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-02-24 03:00:54,071 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:00:54,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 44 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:00:54,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-02-24 03:00:54,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2022-02-24 03:00:54,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 3 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) [2022-02-24 03:00:54,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-02-24 03:00:54,080 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 18 [2022-02-24 03:00:54,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:00:54,081 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-02-24 03:00:54,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 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) [2022-02-24 03:00:54,081 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-02-24 03:00:54,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-24 03:00:54,081 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:00:54,082 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:00:54,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-24 03:00:54,082 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:00:54,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:00:54,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1746706810, now seen corresponding path program 5 times [2022-02-24 03:00:54,083 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:00:54,083 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [283338866] [2022-02-24 03:00:54,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:00:54,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:00:54,240 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:00:54,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:00:54,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:00:54,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:00:54,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:00:54,399 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:00:54,399 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [283338866] [2022-02-24 03:00:54,399 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [283338866] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:00:54,400 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:00:54,400 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 03:00:54,400 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460789658] [2022-02-24 03:00:54,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:00:54,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 03:00:54,400 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:00:54,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 03:00:54,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-02-24 03:00:54,401 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 9 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) [2022-02-24 03:00:54,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:00:54,508 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2022-02-24 03:00:54,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 03:00:54,508 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 9 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 [2022-02-24 03:00:54,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:00:54,510 INFO L225 Difference]: With dead ends: 31 [2022-02-24 03:00:54,510 INFO L226 Difference]: Without dead ends: 23 [2022-02-24 03:00:54,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-02-24 03:00:54,513 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:00:54,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 19 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 03:00:54,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-02-24 03:00:54,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2022-02-24 03:00:54,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 3 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) [2022-02-24 03:00:54,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-02-24 03:00:54,525 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2022-02-24 03:00:54,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:00:54,526 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-02-24 03:00:54,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 9 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) [2022-02-24 03:00:54,527 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-02-24 03:00:54,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-24 03:00:54,528 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:00:54,529 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:00:54,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-24 03:00:54,529 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:00:54,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:00:54,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1165536611, now seen corresponding path program 6 times [2022-02-24 03:00:54,529 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:00:54,530 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478218311] [2022-02-24 03:00:54,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:00:54,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:00:54,685 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:00:54,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:00:54,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:00:54,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:00:54,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:00:54,829 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:00:54,829 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478218311] [2022-02-24 03:00:54,830 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1478218311] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:00:54,830 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:00:54,830 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 03:00:54,830 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964182218] [2022-02-24 03:00:54,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:00:54,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 03:00:54,830 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:00:54,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 03:00:54,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-02-24 03:00:54,831 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 10 states have internal predecessors, (16), 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) [2022-02-24 03:00:54,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:00:54,971 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-02-24 03:00:54,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 03:00:54,971 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 10 states have internal predecessors, (16), 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 20 [2022-02-24 03:00:54,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:00:54,973 INFO L225 Difference]: With dead ends: 32 [2022-02-24 03:00:54,973 INFO L226 Difference]: Without dead ends: 24 [2022-02-24 03:00:54,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-02-24 03:00:54,980 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:00:54,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 44 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:00:54,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-02-24 03:00:54,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2022-02-24 03:00:54,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 3 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) [2022-02-24 03:00:54,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-02-24 03:00:54,986 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 20 [2022-02-24 03:00:54,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:00:54,986 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-02-24 03:00:54,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 10 states have internal predecessors, (16), 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) [2022-02-24 03:00:54,987 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-02-24 03:00:54,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-24 03:00:54,987 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:00:54,987 INFO L514 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:00:54,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-24 03:00:54,988 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:00:54,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:00:54,991 INFO L85 PathProgramCache]: Analyzing trace with hash 329129626, now seen corresponding path program 7 times [2022-02-24 03:00:54,991 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:00:54,991 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1793905878] [2022-02-24 03:00:54,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:00:54,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:00:55,148 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:00:55,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:00:55,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:00:55,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:00:55,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:00:55,346 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:00:55,346 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1793905878] [2022-02-24 03:00:55,346 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1793905878] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:00:55,346 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:00:55,346 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 03:00:55,347 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082595258] [2022-02-24 03:00:55,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:00:55,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 03:00:55,348 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:00:55,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 03:00:55,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-02-24 03:00:55,349 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 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) [2022-02-24 03:00:55,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:00:55,507 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2022-02-24 03:00:55,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 03:00:55,507 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 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 21 [2022-02-24 03:00:55,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:00:55,508 INFO L225 Difference]: With dead ends: 33 [2022-02-24 03:00:55,508 INFO L226 Difference]: Without dead ends: 25 [2022-02-24 03:00:55,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-02-24 03:00:55,509 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:00:55,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 24 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:00:55,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-02-24 03:00:55,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2022-02-24 03:00:55,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 3 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) [2022-02-24 03:00:55,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2022-02-24 03:00:55,513 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 21 [2022-02-24 03:00:55,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:00:55,514 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2022-02-24 03:00:55,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 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) [2022-02-24 03:00:55,514 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2022-02-24 03:00:55,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-24 03:00:55,514 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:00:55,514 INFO L514 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:00:55,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-24 03:00:55,515 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:00:55,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:00:55,515 INFO L85 PathProgramCache]: Analyzing trace with hash 170316867, now seen corresponding path program 8 times [2022-02-24 03:00:55,515 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:00:55,515 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1749783837] [2022-02-24 03:00:55,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:00:55,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:00:55,689 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:00:55,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:00:55,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:00:55,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:00:55,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:00:55,878 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:00:55,879 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1749783837] [2022-02-24 03:00:55,879 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1749783837] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:00:55,879 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:00:55,879 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 03:00:55,879 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215540804] [2022-02-24 03:00:55,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:00:55,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 03:00:55,880 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:00:55,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 03:00:55,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-02-24 03:00:55,880 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 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) [2022-02-24 03:00:56,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:00:56,072 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-02-24 03:00:56,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 03:00:56,072 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 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 22 [2022-02-24 03:00:56,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:00:56,073 INFO L225 Difference]: With dead ends: 34 [2022-02-24 03:00:56,073 INFO L226 Difference]: Without dead ends: 26 [2022-02-24 03:00:56,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-02-24 03:00:56,074 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:00:56,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 54 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:00:56,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-02-24 03:00:56,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2022-02-24 03:00:56,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 3 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) [2022-02-24 03:00:56,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2022-02-24 03:00:56,078 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 22 [2022-02-24 03:00:56,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:00:56,078 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2022-02-24 03:00:56,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 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) [2022-02-24 03:00:56,079 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2022-02-24 03:00:56,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-24 03:00:56,079 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:00:56,079 INFO L514 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:00:56,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-24 03:00:56,079 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:00:56,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:00:56,080 INFO L85 PathProgramCache]: Analyzing trace with hash -457911366, now seen corresponding path program 9 times [2022-02-24 03:00:56,080 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:00:56,080 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1110829049] [2022-02-24 03:00:56,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:00:56,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:00:56,233 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:00:56,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:00:56,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:00:56,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:00:56,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:00:56,418 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:00:56,418 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1110829049] [2022-02-24 03:00:56,418 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1110829049] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:00:56,418 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:00:56,418 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 03:00:56,418 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840995891] [2022-02-24 03:00:56,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:00:56,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 03:00:56,419 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:00:56,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 03:00:56,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-02-24 03:00:56,420 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 13 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) [2022-02-24 03:00:56,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:00:56,625 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2022-02-24 03:00:56,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 03:00:56,626 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 13 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 23 [2022-02-24 03:00:56,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:00:56,626 INFO L225 Difference]: With dead ends: 35 [2022-02-24 03:00:56,626 INFO L226 Difference]: Without dead ends: 27 [2022-02-24 03:00:56,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-02-24 03:00:56,628 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:00:56,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 24 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:00:56,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-02-24 03:00:56,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2022-02-24 03:00:56,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 3 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) [2022-02-24 03:00:56,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2022-02-24 03:00:56,632 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 23 [2022-02-24 03:00:56,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:00:56,632 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2022-02-24 03:00:56,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 13 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) [2022-02-24 03:00:56,632 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2022-02-24 03:00:56,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-24 03:00:56,633 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:00:56,633 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:00:56,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-24 03:00:56,633 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:00:56,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:00:56,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1541849891, now seen corresponding path program 10 times [2022-02-24 03:00:56,634 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:00:56,634 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [871001332] [2022-02-24 03:00:56,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:00:56,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:00:56,785 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:00:56,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:00:56,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:00:56,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:00:56,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:00:57,005 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:00:57,006 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [871001332] [2022-02-24 03:00:57,006 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [871001332] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:00:57,006 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:00:57,006 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 03:00:57,006 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131586543] [2022-02-24 03:00:57,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:00:57,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 03:00:57,007 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:00:57,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 03:00:57,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-02-24 03:00:57,007 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 states have internal predecessors, (20), 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) [2022-02-24 03:00:57,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:00:57,235 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2022-02-24 03:00:57,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 03:00:57,236 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 states have internal predecessors, (20), 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 24 [2022-02-24 03:00:57,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:00:57,236 INFO L225 Difference]: With dead ends: 36 [2022-02-24 03:00:57,237 INFO L226 Difference]: Without dead ends: 28 [2022-02-24 03:00:57,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2022-02-24 03:00:57,238 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:00:57,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 28 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:00:57,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-02-24 03:00:57,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-02-24 03:00:57,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 3 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) [2022-02-24 03:00:57,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2022-02-24 03:00:57,243 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 24 [2022-02-24 03:00:57,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:00:57,243 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2022-02-24 03:00:57,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 states have internal predecessors, (20), 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) [2022-02-24 03:00:57,244 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2022-02-24 03:00:57,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-24 03:00:57,244 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:00:57,244 INFO L514 BasicCegarLoop]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:00:57,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-24 03:00:57,245 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:00:57,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:00:57,245 INFO L85 PathProgramCache]: Analyzing trace with hash -620876823, now seen corresponding path program 11 times [2022-02-24 03:00:57,245 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:00:57,245 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1392154364] [2022-02-24 03:00:57,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:00:57,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:00:57,613 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:00:57,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:00:57,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:00:57,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:00:57,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:00:57,868 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:00:57,869 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1392154364] [2022-02-24 03:00:57,869 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1392154364] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:00:57,869 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:00:57,869 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 03:00:57,869 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149910809] [2022-02-24 03:00:57,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:00:57,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 03:00:57,870 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:00:57,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 03:00:57,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-02-24 03:00:57,870 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 states have internal predecessors, (23), 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) [2022-02-24 03:00:58,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:00:58,134 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2022-02-24 03:00:58,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 03:00:58,135 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 states have internal predecessors, (23), 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 27 [2022-02-24 03:00:58,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:00:58,135 INFO L225 Difference]: With dead ends: 37 [2022-02-24 03:00:58,135 INFO L226 Difference]: Without dead ends: 29 [2022-02-24 03:00:58,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2022-02-24 03:00:58,136 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:00:58,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 53 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:00:58,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-02-24 03:00:58,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-02-24 03:00:58,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 3 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) [2022-02-24 03:00:58,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2022-02-24 03:00:58,142 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 27 [2022-02-24 03:00:58,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:00:58,142 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2022-02-24 03:00:58,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 states have internal predecessors, (23), 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) [2022-02-24 03:00:58,142 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2022-02-24 03:00:58,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-24 03:00:58,143 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:00:58,143 INFO L514 BasicCegarLoop]: trace histogram [11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:00:58,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-24 03:00:58,143 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:00:58,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:00:58,144 INFO L85 PathProgramCache]: Analyzing trace with hash 784888020, now seen corresponding path program 12 times [2022-02-24 03:00:58,144 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:00:58,144 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872966504] [2022-02-24 03:00:58,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:00:58,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:00:58,494 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:00:58,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:00:58,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:00:58,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:00:58,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:00:58,727 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:00:58,728 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872966504] [2022-02-24 03:00:58,728 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1872966504] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:00:58,728 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:00:58,728 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 03:00:58,728 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817429620] [2022-02-24 03:00:58,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:00:58,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 03:00:58,729 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:00:58,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 03:00:58,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-02-24 03:00:58,729 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 17 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) [2022-02-24 03:00:59,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:00:59,015 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2022-02-24 03:00:59,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 03:00:59,015 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 17 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 [2022-02-24 03:00:59,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:00:59,016 INFO L225 Difference]: With dead ends: 38 [2022-02-24 03:00:59,016 INFO L226 Difference]: Without dead ends: 30 [2022-02-24 03:00:59,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2022-02-24 03:00:59,017 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:00:59,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 68 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:00:59,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-02-24 03:00:59,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-02-24 03:00:59,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 3 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) [2022-02-24 03:00:59,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2022-02-24 03:00:59,022 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 28 [2022-02-24 03:00:59,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:00:59,023 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2022-02-24 03:00:59,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 17 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) [2022-02-24 03:00:59,023 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2022-02-24 03:00:59,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-24 03:00:59,024 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:00:59,024 INFO L514 BasicCegarLoop]: trace histogram [12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:00:59,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-24 03:00:59,024 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:00:59,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:00:59,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1413925193, now seen corresponding path program 13 times [2022-02-24 03:00:59,024 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:00:59,024 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1971922233] [2022-02-24 03:00:59,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:00:59,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:00:59,382 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:00:59,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:00:59,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:00:59,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:00:59,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:00:59,644 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:00:59,644 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1971922233] [2022-02-24 03:00:59,644 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1971922233] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:00:59,644 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:00:59,645 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 03:00:59,645 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224776660] [2022-02-24 03:00:59,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:00:59,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 03:00:59,645 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:00:59,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 03:00:59,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2022-02-24 03:00:59,646 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 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) [2022-02-24 03:00:59,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:00:59,950 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2022-02-24 03:00:59,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 03:00:59,950 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 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 29 [2022-02-24 03:00:59,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:00:59,951 INFO L225 Difference]: With dead ends: 39 [2022-02-24 03:00:59,951 INFO L226 Difference]: Without dead ends: 31 [2022-02-24 03:00:59,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=1005, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 03:00:59,953 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:00:59,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 73 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:00:59,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-02-24 03:00:59,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-02-24 03:00:59,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 3 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) [2022-02-24 03:00:59,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2022-02-24 03:00:59,958 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 29 [2022-02-24 03:00:59,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:00:59,958 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2022-02-24 03:00:59,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 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) [2022-02-24 03:00:59,958 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2022-02-24 03:00:59,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-24 03:00:59,959 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:00:59,959 INFO L514 BasicCegarLoop]: trace histogram [13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:00:59,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-24 03:00:59,959 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:00:59,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:00:59,959 INFO L85 PathProgramCache]: Analyzing trace with hash -560758924, now seen corresponding path program 14 times [2022-02-24 03:00:59,959 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:00:59,959 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181971555] [2022-02-24 03:00:59,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:00:59,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:01:00,315 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:01:00,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:00,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:01:00,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:00,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:01:00,626 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:01:00,626 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181971555] [2022-02-24 03:01:00,626 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [181971555] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:01:00,626 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:01:00,626 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 03:01:00,626 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179746465] [2022-02-24 03:01:00,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:01:00,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 03:01:00,627 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:01:00,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 03:01:00,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2022-02-24 03:01:00,627 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 20 states, 20 states have (on average 1.3) internal successors, (26), 19 states have internal predecessors, (26), 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) [2022-02-24 03:01:00,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:01:00,950 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2022-02-24 03:01:00,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 03:01:00,951 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 19 states have internal predecessors, (26), 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 30 [2022-02-24 03:01:00,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:01:00,951 INFO L225 Difference]: With dead ends: 40 [2022-02-24 03:01:00,951 INFO L226 Difference]: Without dead ends: 32 [2022-02-24 03:01:00,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=1137, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 03:01:00,952 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:01:00,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 68 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:01:00,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-02-24 03:01:00,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-02-24 03:01:00,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 3 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) [2022-02-24 03:01:00,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2022-02-24 03:01:00,958 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 30 [2022-02-24 03:01:00,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:01:00,958 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2022-02-24 03:01:00,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 19 states have internal predecessors, (26), 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) [2022-02-24 03:01:00,958 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2022-02-24 03:01:00,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-24 03:01:00,959 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:01:00,959 INFO L514 BasicCegarLoop]: trace histogram [14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:01:00,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-24 03:01:00,959 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:01:00,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:01:00,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1646424407, now seen corresponding path program 15 times [2022-02-24 03:01:00,960 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:01:00,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579844103] [2022-02-24 03:01:00,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:01:00,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:01:01,311 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:01:01,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:01,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:01:01,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:01,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:01:01,617 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:01:01,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1579844103] [2022-02-24 03:01:01,617 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1579844103] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:01:01,617 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:01:01,617 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 03:01:01,617 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103403201] [2022-02-24 03:01:01,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:01:01,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 03:01:01,618 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:01:01,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 03:01:01,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2022-02-24 03:01:01,618 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 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) [2022-02-24 03:01:01,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:01:01,916 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2022-02-24 03:01:01,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-24 03:01:01,917 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 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 [2022-02-24 03:01:01,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:01:01,917 INFO L225 Difference]: With dead ends: 41 [2022-02-24 03:01:01,917 INFO L226 Difference]: Without dead ends: 33 [2022-02-24 03:01:01,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=1277, Unknown=0, NotChecked=0, Total=1406 [2022-02-24 03:01:01,919 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:01:01,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 48 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:01:01,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-02-24 03:01:01,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-02-24 03:01:01,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 3 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) [2022-02-24 03:01:01,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2022-02-24 03:01:01,924 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 31 [2022-02-24 03:01:01,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:01:01,925 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2022-02-24 03:01:01,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 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) [2022-02-24 03:01:01,925 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2022-02-24 03:01:01,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-24 03:01:01,925 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:01:01,925 INFO L514 BasicCegarLoop]: trace histogram [15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:01:01,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-24 03:01:01,926 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:01:01,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:01:01,926 INFO L85 PathProgramCache]: Analyzing trace with hash -942316012, now seen corresponding path program 16 times [2022-02-24 03:01:01,926 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:01:01,926 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479928048] [2022-02-24 03:01:01,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:01:01,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:01:02,274 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:01:02,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:02,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:01:02,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:02,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:01:02,620 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:01:02,620 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479928048] [2022-02-24 03:01:02,620 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1479928048] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:01:02,620 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:01:02,620 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 03:01:02,620 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157254897] [2022-02-24 03:01:02,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:01:02,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 03:01:02,621 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:01:02,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 03:01:02,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2022-02-24 03:01:02,621 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 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) [2022-02-24 03:01:02,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:01:02,937 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2022-02-24 03:01:02,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 03:01:02,937 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 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 32 [2022-02-24 03:01:02,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:01:02,938 INFO L225 Difference]: With dead ends: 42 [2022-02-24 03:01:02,938 INFO L226 Difference]: Without dead ends: 34 [2022-02-24 03:01:02,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=1425, Unknown=0, NotChecked=0, Total=1560 [2022-02-24 03:01:02,939 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:01:02,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 63 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:01:02,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-02-24 03:01:02,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-02-24 03:01:02,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 3 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) [2022-02-24 03:01:02,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2022-02-24 03:01:02,944 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 32 [2022-02-24 03:01:02,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:01:02,944 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2022-02-24 03:01:02,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 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) [2022-02-24 03:01:02,944 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2022-02-24 03:01:02,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-24 03:01:02,945 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:01:02,945 INFO L514 BasicCegarLoop]: trace histogram [16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:01:02,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-24 03:01:02,946 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:01:02,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:01:02,946 INFO L85 PathProgramCache]: Analyzing trace with hash -589792247, now seen corresponding path program 17 times [2022-02-24 03:01:02,946 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:01:02,946 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [204525237] [2022-02-24 03:01:02,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:01:02,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:01:03,269 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:01:03,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:03,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:01:03,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:03,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:01:03,614 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:01:03,614 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [204525237] [2022-02-24 03:01:03,614 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [204525237] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:01:03,614 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:01:03,614 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 03:01:03,614 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756227703] [2022-02-24 03:01:03,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:01:03,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 03:01:03,615 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:01:03,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 03:01:03,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2022-02-24 03:01:03,616 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 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) [2022-02-24 03:01:03,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:01:03,989 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2022-02-24 03:01:03,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-24 03:01:03,990 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 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 [2022-02-24 03:01:03,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:01:03,991 INFO L225 Difference]: With dead ends: 43 [2022-02-24 03:01:03,991 INFO L226 Difference]: Without dead ends: 35 [2022-02-24 03:01:03,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=141, Invalid=1581, Unknown=0, NotChecked=0, Total=1722 [2022-02-24 03:01:03,992 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:01:03,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 58 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:01:03,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-02-24 03:01:03,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-02-24 03:01:03,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 states have internal predecessors, (32), 3 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) [2022-02-24 03:01:03,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2022-02-24 03:01:03,997 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 33 [2022-02-24 03:01:03,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:01:03,998 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2022-02-24 03:01:03,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 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) [2022-02-24 03:01:03,998 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2022-02-24 03:01:03,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-24 03:01:03,998 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:01:03,999 INFO L514 BasicCegarLoop]: trace histogram [17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:01:03,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-24 03:01:03,999 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:01:03,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:01:03,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1748509876, now seen corresponding path program 18 times [2022-02-24 03:01:03,999 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:01:03,999 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1438878167] [2022-02-24 03:01:03,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:01:04,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:01:04,350 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:01:04,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:04,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:01:04,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:04,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:01:04,689 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:01:04,689 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1438878167] [2022-02-24 03:01:04,690 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1438878167] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:01:04,690 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:01:04,690 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 03:01:04,690 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053221789] [2022-02-24 03:01:04,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:01:04,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 03:01:04,690 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:01:04,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 03:01:04,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2022-02-24 03:01:04,691 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 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) [2022-02-24 03:01:05,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:01:05,168 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2022-02-24 03:01:05,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-24 03:01:05,168 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 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 34 [2022-02-24 03:01:05,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:01:05,169 INFO L225 Difference]: With dead ends: 44 [2022-02-24 03:01:05,169 INFO L226 Difference]: Without dead ends: 36 [2022-02-24 03:01:05,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=147, Invalid=1745, Unknown=0, NotChecked=0, Total=1892 [2022-02-24 03:01:05,170 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:01:05,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 93 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:01:05,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-02-24 03:01:05,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-02-24 03:01:05,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 3 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) [2022-02-24 03:01:05,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2022-02-24 03:01:05,177 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 34 [2022-02-24 03:01:05,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:01:05,177 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2022-02-24 03:01:05,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 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) [2022-02-24 03:01:05,177 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2022-02-24 03:01:05,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-24 03:01:05,177 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:01:05,178 INFO L514 BasicCegarLoop]: trace histogram [18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:01:05,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-24 03:01:05,178 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:01:05,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:01:05,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1221431657, now seen corresponding path program 19 times [2022-02-24 03:01:05,178 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:01:05,178 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1007353088] [2022-02-24 03:01:05,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:01:05,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:01:05,535 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:01:05,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:05,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:01:05,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:05,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:01:05,867 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:01:05,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1007353088] [2022-02-24 03:01:05,867 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1007353088] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:01:05,867 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:01:05,867 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 03:01:05,867 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274704635] [2022-02-24 03:01:05,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:01:05,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 03:01:05,868 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:01:05,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 03:01:05,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2022-02-24 03:01:05,869 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 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) [2022-02-24 03:01:06,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:01:06,345 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2022-02-24 03:01:06,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-24 03:01:06,346 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 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 35 [2022-02-24 03:01:06,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:01:06,346 INFO L225 Difference]: With dead ends: 45 [2022-02-24 03:01:06,346 INFO L226 Difference]: Without dead ends: 37 [2022-02-24 03:01:06,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=153, Invalid=1917, Unknown=0, NotChecked=0, Total=2070 [2022-02-24 03:01:06,347 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:01:06,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 83 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:01:06,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-02-24 03:01:06,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-02-24 03:01:06,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 3 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) [2022-02-24 03:01:06,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2022-02-24 03:01:06,354 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 35 [2022-02-24 03:01:06,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:01:06,354 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2022-02-24 03:01:06,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 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) [2022-02-24 03:01:06,354 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2022-02-24 03:01:06,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-24 03:01:06,354 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:01:06,354 INFO L514 BasicCegarLoop]: trace histogram [19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:01:06,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-24 03:01:06,355 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:01:06,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:01:06,355 INFO L85 PathProgramCache]: Analyzing trace with hash 2061876052, now seen corresponding path program 20 times [2022-02-24 03:01:06,355 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:01:06,355 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [815485865] [2022-02-24 03:01:06,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:01:06,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:01:06,710 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:01:06,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:06,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:01:06,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:06,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:01:07,081 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:01:07,081 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [815485865] [2022-02-24 03:01:07,081 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [815485865] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:01:07,081 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:01:07,081 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 03:01:07,081 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488638505] [2022-02-24 03:01:07,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:01:07,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 03:01:07,082 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:01:07,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 03:01:07,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=590, Unknown=0, NotChecked=0, Total=650 [2022-02-24 03:01:07,082 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 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) [2022-02-24 03:01:07,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:01:07,568 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2022-02-24 03:01:07,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-24 03:01:07,569 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 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 [2022-02-24 03:01:07,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:01:07,569 INFO L225 Difference]: With dead ends: 48 [2022-02-24 03:01:07,569 INFO L226 Difference]: Without dead ends: 40 [2022-02-24 03:01:07,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=159, Invalid=2097, Unknown=0, NotChecked=0, Total=2256 [2022-02-24 03:01:07,573 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 13 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:01:07,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 123 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:01:07,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-02-24 03:01:07,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-02-24 03:01:07,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 3 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) [2022-02-24 03:01:07,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2022-02-24 03:01:07,582 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2022-02-24 03:01:07,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:01:07,582 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2022-02-24 03:01:07,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 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) [2022-02-24 03:01:07,582 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2022-02-24 03:01:07,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-24 03:01:07,582 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:01:07,583 INFO L514 BasicCegarLoop]: trace histogram [20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:01:07,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-24 03:01:07,583 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:01:07,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:01:07,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1949118775, now seen corresponding path program 21 times [2022-02-24 03:01:07,583 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:01:07,583 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1788450904] [2022-02-24 03:01:07,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:01:07,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:01:07,818 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:01:07,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:07,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:01:07,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:07,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:01:08,194 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:01:08,194 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1788450904] [2022-02-24 03:01:08,194 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1788450904] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:01:08,194 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:01:08,194 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-24 03:01:08,194 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227093706] [2022-02-24 03:01:08,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:01:08,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-24 03:01:08,195 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:01:08,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-24 03:01:08,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=640, Unknown=0, NotChecked=0, Total=702 [2022-02-24 03:01:08,196 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 states have internal predecessors, (33), 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) [2022-02-24 03:01:08,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:01:08,695 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2022-02-24 03:01:08,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-24 03:01:08,696 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 states have internal predecessors, (33), 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 37 [2022-02-24 03:01:08,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:01:08,697 INFO L225 Difference]: With dead ends: 46 [2022-02-24 03:01:08,697 INFO L226 Difference]: Without dead ends: 41 [2022-02-24 03:01:08,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=165, Invalid=2285, Unknown=0, NotChecked=0, Total=2450 [2022-02-24 03:01:08,698 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 12 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:01:08,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 98 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:01:08,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-02-24 03:01:08,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-02-24 03:01:08,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 3 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) [2022-02-24 03:01:08,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2022-02-24 03:01:08,704 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 37 [2022-02-24 03:01:08,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:01:08,704 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2022-02-24 03:01:08,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 states have internal predecessors, (33), 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) [2022-02-24 03:01:08,705 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2022-02-24 03:01:08,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-24 03:01:08,705 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:01:08,705 INFO L514 BasicCegarLoop]: trace histogram [20, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:01:08,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-24 03:01:08,706 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:01:08,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:01:08,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1730300285, now seen corresponding path program 22 times [2022-02-24 03:01:08,706 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:01:08,706 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [645456346] [2022-02-24 03:01:08,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:01:08,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:01:08,982 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:01:08,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:09,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:01:09,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:09,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:01:09,381 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:01:09,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [645456346] [2022-02-24 03:01:09,381 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [645456346] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:01:09,381 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:01:09,381 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 03:01:09,382 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459333430] [2022-02-24 03:01:09,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:01:09,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 03:01:09,382 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:01:09,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 03:01:09,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=692, Unknown=0, NotChecked=0, Total=756 [2022-02-24 03:01:09,382 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 27 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) [2022-02-24 03:01:09,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:01:09,927 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2022-02-24 03:01:09,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-24 03:01:09,928 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 27 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 40 [2022-02-24 03:01:09,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:01:09,928 INFO L225 Difference]: With dead ends: 50 [2022-02-24 03:01:09,931 INFO L226 Difference]: Without dead ends: 42 [2022-02-24 03:01:09,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=171, Invalid=2481, Unknown=0, NotChecked=0, Total=2652 [2022-02-24 03:01:09,936 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 12 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:01:09,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 88 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:01:09,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-02-24 03:01:09,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-02-24 03:01:09,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 states have internal predecessors, (39), 3 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) [2022-02-24 03:01:09,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2022-02-24 03:01:09,943 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 40 [2022-02-24 03:01:09,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:01:09,943 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2022-02-24 03:01:09,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 27 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) [2022-02-24 03:01:09,944 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2022-02-24 03:01:09,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-24 03:01:09,944 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:01:09,944 INFO L514 BasicCegarLoop]: trace histogram [21, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:01:09,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-24 03:01:09,944 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:01:09,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:01:09,945 INFO L85 PathProgramCache]: Analyzing trace with hash 752499066, now seen corresponding path program 23 times [2022-02-24 03:01:09,945 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:01:09,945 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1848335776] [2022-02-24 03:01:09,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:01:09,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:01:10,250 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:01:10,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:10,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:01:10,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:10,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:01:10,691 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:01:10,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1848335776] [2022-02-24 03:01:10,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1848335776] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:01:10,691 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:01:10,691 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 03:01:10,691 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907552243] [2022-02-24 03:01:10,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:01:10,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 03:01:10,691 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:01:10,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 03:01:10,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=746, Unknown=0, NotChecked=0, Total=812 [2022-02-24 03:01:10,692 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 28 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) [2022-02-24 03:01:11,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:01:11,315 INFO L93 Difference]: Finished difference Result 51 states and 54 transitions. [2022-02-24 03:01:11,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-24 03:01:11,316 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 28 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 41 [2022-02-24 03:01:11,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:01:11,317 INFO L225 Difference]: With dead ends: 51 [2022-02-24 03:01:11,317 INFO L226 Difference]: Without dead ends: 43 [2022-02-24 03:01:11,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=177, Invalid=2685, Unknown=0, NotChecked=0, Total=2862 [2022-02-24 03:01:11,318 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 12 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:01:11,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 133 Invalid, 895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 854 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 03:01:11,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-02-24 03:01:11,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-02-24 03:01:11,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 3 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) [2022-02-24 03:01:11,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2022-02-24 03:01:11,325 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 41 [2022-02-24 03:01:11,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:01:11,325 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2022-02-24 03:01:11,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 28 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) [2022-02-24 03:01:11,325 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2022-02-24 03:01:11,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-24 03:01:11,325 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:01:11,325 INFO L514 BasicCegarLoop]: trace histogram [22, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:01:11,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-24 03:01:11,326 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:01:11,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:01:11,326 INFO L85 PathProgramCache]: Analyzing trace with hash 409867619, now seen corresponding path program 24 times [2022-02-24 03:01:11,326 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:01:11,326 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1959418158] [2022-02-24 03:01:11,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:01:11,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:01:11,643 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:01:11,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:11,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:01:11,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:11,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:01:12,110 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:01:12,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1959418158] [2022-02-24 03:01:12,110 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1959418158] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:01:12,110 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:01:12,110 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 03:01:12,110 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611366954] [2022-02-24 03:01:12,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:01:12,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 03:01:12,111 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:01:12,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 03:01:12,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=802, Unknown=0, NotChecked=0, Total=870 [2022-02-24 03:01:12,112 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 30 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 29 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) [2022-02-24 03:01:12,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:01:12,732 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2022-02-24 03:01:12,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-24 03:01:12,732 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 29 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 42 [2022-02-24 03:01:12,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:01:12,733 INFO L225 Difference]: With dead ends: 52 [2022-02-24 03:01:12,733 INFO L226 Difference]: Without dead ends: 44 [2022-02-24 03:01:12,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 10 SyntacticMatches, 6 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=183, Invalid=2897, Unknown=0, NotChecked=0, Total=3080 [2022-02-24 03:01:12,734 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 12 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 937 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:01:12,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 143 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 937 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 03:01:12,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-02-24 03:01:12,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-02-24 03:01:12,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 3 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) [2022-02-24 03:01:12,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2022-02-24 03:01:12,741 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 42 [2022-02-24 03:01:12,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:01:12,741 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2022-02-24 03:01:12,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 29 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) [2022-02-24 03:01:12,741 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2022-02-24 03:01:12,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-24 03:01:12,742 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:01:12,742 INFO L514 BasicCegarLoop]: trace histogram [23, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:01:12,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-24 03:01:12,742 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:01:12,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:01:12,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1621772646, now seen corresponding path program 25 times [2022-02-24 03:01:12,742 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:01:12,743 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1952240421] [2022-02-24 03:01:12,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:01:12,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:01:13,062 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:01:13,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:13,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:01:13,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:13,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:01:13,609 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:01:13,609 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1952240421] [2022-02-24 03:01:13,609 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1952240421] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:01:13,609 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:01:13,609 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-24 03:01:13,610 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879076809] [2022-02-24 03:01:13,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:01:13,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-24 03:01:13,610 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:01:13,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-24 03:01:13,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=860, Unknown=0, NotChecked=0, Total=930 [2022-02-24 03:01:13,611 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 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) [2022-02-24 03:01:14,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:01:14,338 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2022-02-24 03:01:14,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-24 03:01:14,339 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 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 43 [2022-02-24 03:01:14,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:01:14,339 INFO L225 Difference]: With dead ends: 53 [2022-02-24 03:01:14,339 INFO L226 Difference]: Without dead ends: 45 [2022-02-24 03:01:14,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 10 SyntacticMatches, 6 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=189, Invalid=3117, Unknown=0, NotChecked=0, Total=3306 [2022-02-24 03:01:14,341 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 12 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 1024 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 1067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:01:14,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 153 Invalid, 1067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1024 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 03:01:14,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-02-24 03:01:14,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-02-24 03:01:14,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.05) internal successors, (42), 40 states have internal predecessors, (42), 3 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) [2022-02-24 03:01:14,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2022-02-24 03:01:14,348 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 43 [2022-02-24 03:01:14,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:01:14,348 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2022-02-24 03:01:14,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 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) [2022-02-24 03:01:14,348 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2022-02-24 03:01:14,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-24 03:01:14,349 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:01:14,349 INFO L514 BasicCegarLoop]: trace histogram [24, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:01:14,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-24 03:01:14,349 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:01:14,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:01:14,349 INFO L85 PathProgramCache]: Analyzing trace with hash -178111421, now seen corresponding path program 26 times [2022-02-24 03:01:14,350 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:01:14,350 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156817415] [2022-02-24 03:01:14,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:01:14,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:01:14,662 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:01:14,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:14,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:01:14,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:14,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:01:15,114 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:01:15,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156817415] [2022-02-24 03:01:15,115 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [156817415] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:01:15,115 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:01:15,115 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-24 03:01:15,115 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563958994] [2022-02-24 03:01:15,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:01:15,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-24 03:01:15,115 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:01:15,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-24 03:01:15,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=920, Unknown=0, NotChecked=0, Total=992 [2022-02-24 03:01:15,116 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 32 states, 32 states have (on average 1.25) internal successors, (40), 31 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) [2022-02-24 03:01:15,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:01:15,771 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2022-02-24 03:01:15,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-24 03:01:15,771 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.25) internal successors, (40), 31 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 [2022-02-24 03:01:15,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:01:15,772 INFO L225 Difference]: With dead ends: 54 [2022-02-24 03:01:15,772 INFO L226 Difference]: Without dead ends: 46 [2022-02-24 03:01:15,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=195, Invalid=3345, Unknown=0, NotChecked=0, Total=3540 [2022-02-24 03:01:15,773 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 12 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 990 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:01:15,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 138 Invalid, 1034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 990 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 03:01:15,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-02-24 03:01:15,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-02-24 03:01:15,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 states have internal predecessors, (43), 3 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) [2022-02-24 03:01:15,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2022-02-24 03:01:15,778 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 44 [2022-02-24 03:01:15,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:01:15,778 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2022-02-24 03:01:15,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.25) internal successors, (40), 31 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) [2022-02-24 03:01:15,779 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2022-02-24 03:01:15,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-02-24 03:01:15,779 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:01:15,779 INFO L514 BasicCegarLoop]: trace histogram [25, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:01:15,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-24 03:01:15,779 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:01:15,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:01:15,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1625713594, now seen corresponding path program 27 times [2022-02-24 03:01:15,780 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:01:15,780 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [852554602] [2022-02-24 03:01:15,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:01:15,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:01:16,096 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:01:16,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:16,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:01:16,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:16,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:01:16,666 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:01:16,666 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [852554602] [2022-02-24 03:01:16,666 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [852554602] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:01:16,666 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:01:16,666 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-24 03:01:16,666 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70346526] [2022-02-24 03:01:16,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:01:16,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-24 03:01:16,667 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:01:16,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-24 03:01:16,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=982, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 03:01:16,668 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 33 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 32 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) [2022-02-24 03:01:17,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:01:17,376 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2022-02-24 03:01:17,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-24 03:01:17,376 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 32 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 45 [2022-02-24 03:01:17,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:01:17,377 INFO L225 Difference]: With dead ends: 55 [2022-02-24 03:01:17,377 INFO L226 Difference]: Without dead ends: 47 [2022-02-24 03:01:17,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 10 SyntacticMatches, 6 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=201, Invalid=3581, Unknown=0, NotChecked=0, Total=3782 [2022-02-24 03:01:17,378 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 12 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 1080 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:01:17,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 148 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1080 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 03:01:17,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-02-24 03:01:17,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-02-24 03:01:17,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 42 states have internal predecessors, (44), 3 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) [2022-02-24 03:01:17,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2022-02-24 03:01:17,386 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 45 [2022-02-24 03:01:17,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:01:17,386 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2022-02-24 03:01:17,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 32 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) [2022-02-24 03:01:17,386 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2022-02-24 03:01:17,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-24 03:01:17,386 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:01:17,387 INFO L514 BasicCegarLoop]: trace histogram [26, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:01:17,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-24 03:01:17,387 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:01:17,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:01:17,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1709714211, now seen corresponding path program 28 times [2022-02-24 03:01:17,387 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:01:17,387 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1393878573] [2022-02-24 03:01:17,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:01:17,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:01:17,710 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:01:17,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:17,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:01:17,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:17,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:01:18,261 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:01:18,261 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1393878573] [2022-02-24 03:01:18,261 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1393878573] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:01:18,261 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:01:18,261 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-24 03:01:18,261 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378176096] [2022-02-24 03:01:18,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:01:18,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-24 03:01:18,262 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:01:18,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-24 03:01:18,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=1046, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 03:01:18,263 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 34 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 33 states have internal predecessors, (42), 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) [2022-02-24 03:01:19,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:01:19,055 INFO L93 Difference]: Finished difference Result 56 states and 59 transitions. [2022-02-24 03:01:19,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-24 03:01:19,055 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 33 states have internal predecessors, (42), 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 46 [2022-02-24 03:01:19,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:01:19,056 INFO L225 Difference]: With dead ends: 56 [2022-02-24 03:01:19,056 INFO L226 Difference]: Without dead ends: 48 [2022-02-24 03:01:19,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=207, Invalid=3825, Unknown=0, NotChecked=0, Total=4032 [2022-02-24 03:01:19,057 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 12 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 1228 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 1274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:01:19,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 168 Invalid, 1274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1228 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 03:01:19,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-02-24 03:01:19,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-02-24 03:01:19,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 43 states have internal predecessors, (45), 3 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) [2022-02-24 03:01:19,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2022-02-24 03:01:19,065 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 46 [2022-02-24 03:01:19,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:01:19,065 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2022-02-24 03:01:19,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 33 states have internal predecessors, (42), 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) [2022-02-24 03:01:19,065 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2022-02-24 03:01:19,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-24 03:01:19,066 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:01:19,066 INFO L514 BasicCegarLoop]: trace histogram [27, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:01:19,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-24 03:01:19,066 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:01:19,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:01:19,067 INFO L85 PathProgramCache]: Analyzing trace with hash 18766042, now seen corresponding path program 29 times [2022-02-24 03:01:19,067 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:01:19,067 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [604461166] [2022-02-24 03:01:19,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:01:19,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:01:19,378 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:01:19,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:19,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:01:19,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:19,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:01:19,932 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:01:19,932 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [604461166] [2022-02-24 03:01:19,932 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [604461166] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:01:19,932 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:01:19,932 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-24 03:01:19,932 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120938278] [2022-02-24 03:01:19,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:01:19,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-24 03:01:19,933 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:01:19,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-24 03:01:19,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=1112, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 03:01:19,933 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 35 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 34 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) [2022-02-24 03:01:20,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:01:20,740 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2022-02-24 03:01:20,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-24 03:01:20,740 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 34 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 [2022-02-24 03:01:20,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:01:20,741 INFO L225 Difference]: With dead ends: 57 [2022-02-24 03:01:20,741 INFO L226 Difference]: Without dead ends: 49 [2022-02-24 03:01:20,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=213, Invalid=4077, Unknown=0, NotChecked=0, Total=4290 [2022-02-24 03:01:20,742 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 12 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 1160 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 1207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:01:20,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 148 Invalid, 1207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1160 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 03:01:20,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-02-24 03:01:20,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-02-24 03:01:20,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 3 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) [2022-02-24 03:01:20,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2022-02-24 03:01:20,749 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 47 [2022-02-24 03:01:20,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:01:20,749 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2022-02-24 03:01:20,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 34 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) [2022-02-24 03:01:20,749 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2022-02-24 03:01:20,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-24 03:01:20,749 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:01:20,749 INFO L514 BasicCegarLoop]: trace histogram [28, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:01:20,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-24 03:01:20,750 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:01:20,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:01:20,750 INFO L85 PathProgramCache]: Analyzing trace with hash -861019645, now seen corresponding path program 30 times [2022-02-24 03:01:20,750 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:01:20,750 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1844064552] [2022-02-24 03:01:20,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:01:20,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:01:21,052 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:01:21,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:21,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:01:21,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:21,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:01:21,663 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:01:21,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1844064552] [2022-02-24 03:01:21,664 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1844064552] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:01:21,664 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:01:21,664 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-24 03:01:21,664 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017906809] [2022-02-24 03:01:21,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:01:21,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-24 03:01:21,664 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:01:21,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-24 03:01:21,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1180, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 03:01:21,665 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 36 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 35 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) [2022-02-24 03:01:22,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:01:22,513 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2022-02-24 03:01:22,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-24 03:01:22,513 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 35 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 48 [2022-02-24 03:01:22,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:01:22,514 INFO L225 Difference]: With dead ends: 58 [2022-02-24 03:01:22,514 INFO L226 Difference]: Without dead ends: 50 [2022-02-24 03:01:22,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=219, Invalid=4337, Unknown=0, NotChecked=0, Total=4556 [2022-02-24 03:01:22,515 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 12 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 1229 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 1277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:01:22,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 153 Invalid, 1277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1229 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 03:01:22,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-02-24 03:01:22,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-02-24 03:01:22,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 45 states have internal predecessors, (47), 3 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) [2022-02-24 03:01:22,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2022-02-24 03:01:22,523 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 48 [2022-02-24 03:01:22,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:01:22,523 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2022-02-24 03:01:22,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 35 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) [2022-02-24 03:01:22,526 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2022-02-24 03:01:22,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-24 03:01:22,526 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:01:22,526 INFO L514 BasicCegarLoop]: trace histogram [29, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:01:22,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-24 03:01:22,526 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:01:22,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:01:22,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1930395130, now seen corresponding path program 31 times [2022-02-24 03:01:22,527 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:01:22,527 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [968531476] [2022-02-24 03:01:22,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:01:22,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:01:22,843 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:01:22,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:22,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:01:22,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:22,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:01:23,415 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:01:23,416 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [968531476] [2022-02-24 03:01:23,416 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [968531476] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:01:23,416 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:01:23,416 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-24 03:01:23,416 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279887381] [2022-02-24 03:01:23,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:01:23,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-24 03:01:23,416 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:01:23,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-24 03:01:23,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1250, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 03:01:23,417 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 37 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 36 states have internal predecessors, (45), 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) [2022-02-24 03:01:24,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:01:24,363 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2022-02-24 03:01:24,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-24 03:01:24,364 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 36 states have internal predecessors, (45), 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 49 [2022-02-24 03:01:24,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:01:24,364 INFO L225 Difference]: With dead ends: 61 [2022-02-24 03:01:24,364 INFO L226 Difference]: Without dead ends: 53 [2022-02-24 03:01:24,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=225, Invalid=4605, Unknown=0, NotChecked=0, Total=4830 [2022-02-24 03:01:24,366 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 14 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 1518 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 1570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:01:24,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 183 Invalid, 1570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1518 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 03:01:24,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-02-24 03:01:24,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-02-24 03:01:24,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 states have internal predecessors, (49), 3 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) [2022-02-24 03:01:24,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2022-02-24 03:01:24,374 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 49 [2022-02-24 03:01:24,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:01:24,374 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2022-02-24 03:01:24,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 36 states have internal predecessors, (45), 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) [2022-02-24 03:01:24,374 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2022-02-24 03:01:24,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-24 03:01:24,374 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:01:24,374 INFO L514 BasicCegarLoop]: trace histogram [30, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:01:24,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-24 03:01:24,375 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:01:24,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:01:24,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1730060061, now seen corresponding path program 32 times [2022-02-24 03:01:24,375 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:01:24,375 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [332767609] [2022-02-24 03:01:24,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:01:24,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:01:24,627 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:01:24,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:24,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:01:24,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:24,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:01:25,294 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:01:25,295 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [332767609] [2022-02-24 03:01:25,295 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [332767609] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:01:25,295 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:01:25,295 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-02-24 03:01:25,295 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629521379] [2022-02-24 03:01:25,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:01:25,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-24 03:01:25,295 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:01:25,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-24 03:01:25,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1322, Unknown=0, NotChecked=0, Total=1406 [2022-02-24 03:01:25,296 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 38 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 37 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) [2022-02-24 03:01:26,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:01:26,256 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2022-02-24 03:01:26,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-24 03:01:26,256 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 37 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 [2022-02-24 03:01:26,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:01:26,257 INFO L225 Difference]: With dead ends: 59 [2022-02-24 03:01:26,257 INFO L226 Difference]: Without dead ends: 54 [2022-02-24 03:01:26,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 9 SyntacticMatches, 6 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1100 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=231, Invalid=4881, Unknown=0, NotChecked=0, Total=5112 [2022-02-24 03:01:26,258 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 13 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 1532 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 1583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:01:26,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 178 Invalid, 1583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1532 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 03:01:26,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-02-24 03:01:26,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-02-24 03:01:26,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 49 states have internal predecessors, (51), 3 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) [2022-02-24 03:01:26,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2022-02-24 03:01:26,264 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 50 [2022-02-24 03:01:26,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:01:26,264 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2022-02-24 03:01:26,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 37 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) [2022-02-24 03:01:26,264 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2022-02-24 03:01:26,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-02-24 03:01:26,265 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:01:26,265 INFO L514 BasicCegarLoop]: trace histogram [30, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:01:26,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-24 03:01:26,265 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:01:26,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:01:26,265 INFO L85 PathProgramCache]: Analyzing trace with hash 192525865, now seen corresponding path program 33 times [2022-02-24 03:01:26,266 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:01:26,266 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [616695337] [2022-02-24 03:01:26,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:01:26,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:01:26,560 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:01:26,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:26,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:01:26,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:26,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:01:27,268 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:01:27,269 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [616695337] [2022-02-24 03:01:27,269 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [616695337] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:01:27,269 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:01:27,269 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-02-24 03:01:27,269 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316940114] [2022-02-24 03:01:27,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:01:27,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-02-24 03:01:27,269 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:01:27,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-02-24 03:01:27,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1396, Unknown=0, NotChecked=0, Total=1482 [2022-02-24 03:01:27,270 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 39 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 38 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) [2022-02-24 03:01:28,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:01:28,246 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2022-02-24 03:01:28,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-24 03:01:28,246 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 38 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 53 [2022-02-24 03:01:28,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:01:28,247 INFO L225 Difference]: With dead ends: 63 [2022-02-24 03:01:28,247 INFO L226 Difference]: Without dead ends: 55 [2022-02-24 03:01:28,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 10 SyntacticMatches, 8 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1167 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=237, Invalid=5165, Unknown=0, NotChecked=0, Total=5402 [2022-02-24 03:01:28,248 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 13 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 1476 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 1528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:01:28,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 163 Invalid, 1528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1476 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 03:01:28,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-02-24 03:01:28,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-02-24 03:01:28,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 3 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) [2022-02-24 03:01:28,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2022-02-24 03:01:28,254 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 53 [2022-02-24 03:01:28,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:01:28,254 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2022-02-24 03:01:28,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 38 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) [2022-02-24 03:01:28,255 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2022-02-24 03:01:28,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-24 03:01:28,255 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:01:28,255 INFO L514 BasicCegarLoop]: trace histogram [31, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:01:28,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-24 03:01:28,255 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:01:28,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:01:28,256 INFO L85 PathProgramCache]: Analyzing trace with hash 230567572, now seen corresponding path program 34 times [2022-02-24 03:01:28,256 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:01:28,256 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1184432594] [2022-02-24 03:01:28,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:01:28,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:01:28,560 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:01:28,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:28,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:01:28,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:28,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:01:29,254 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:01:29,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1184432594] [2022-02-24 03:01:29,254 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1184432594] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:01:29,254 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:01:29,254 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-02-24 03:01:29,254 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569215940] [2022-02-24 03:01:29,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:01:29,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-24 03:01:29,254 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:01:29,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-24 03:01:29,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1472, Unknown=0, NotChecked=0, Total=1560 [2022-02-24 03:01:29,255 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 40 states, 40 states have (on average 1.25) internal successors, (50), 39 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) [2022-02-24 03:01:30,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:01:30,336 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2022-02-24 03:01:30,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-24 03:01:30,337 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.25) internal successors, (50), 39 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 54 [2022-02-24 03:01:30,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:01:30,337 INFO L225 Difference]: With dead ends: 64 [2022-02-24 03:01:30,337 INFO L226 Difference]: Without dead ends: 56 [2022-02-24 03:01:30,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 10 SyntacticMatches, 8 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=243, Invalid=5457, Unknown=0, NotChecked=0, Total=5700 [2022-02-24 03:01:30,338 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 13 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 1729 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 1782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:01:30,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 193 Invalid, 1782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1729 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 03:01:30,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-02-24 03:01:30,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-02-24 03:01:30,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 3 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) [2022-02-24 03:01:30,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2022-02-24 03:01:30,344 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 54 [2022-02-24 03:01:30,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:01:30,344 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2022-02-24 03:01:30,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.25) internal successors, (50), 39 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) [2022-02-24 03:01:30,344 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2022-02-24 03:01:30,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-24 03:01:30,344 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:01:30,344 INFO L514 BasicCegarLoop]: trace histogram [32, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:01:30,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-24 03:01:30,345 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:01:30,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:01:30,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1409860489, now seen corresponding path program 35 times [2022-02-24 03:01:30,345 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:01:30,345 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [383565811] [2022-02-24 03:01:30,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:01:30,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:01:30,652 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:01:30,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:30,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:01:30,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:30,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:01:31,366 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:01:31,366 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [383565811] [2022-02-24 03:01:31,366 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [383565811] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:01:31,366 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:01:31,366 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-02-24 03:01:31,366 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645928890] [2022-02-24 03:01:31,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:01:31,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-24 03:01:31,367 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:01:31,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-24 03:01:31,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1550, Unknown=0, NotChecked=0, Total=1640 [2022-02-24 03:01:31,368 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 41 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 40 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) [2022-02-24 03:01:32,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:01:32,428 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2022-02-24 03:01:32,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-24 03:01:32,428 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 40 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 [2022-02-24 03:01:32,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:01:32,429 INFO L225 Difference]: With dead ends: 65 [2022-02-24 03:01:32,429 INFO L226 Difference]: Without dead ends: 57 [2022-02-24 03:01:32,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 12 SyntacticMatches, 6 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=249, Invalid=5757, Unknown=0, NotChecked=0, Total=6006 [2022-02-24 03:01:32,430 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 13 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 1742 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 1796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:01:32,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 188 Invalid, 1796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1742 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 03:01:32,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-02-24 03:01:32,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-02-24 03:01:32,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 3 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) [2022-02-24 03:01:32,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2022-02-24 03:01:32,439 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 55 [2022-02-24 03:01:32,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:01:32,439 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2022-02-24 03:01:32,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 40 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) [2022-02-24 03:01:32,439 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2022-02-24 03:01:32,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-24 03:01:32,439 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:01:32,440 INFO L514 BasicCegarLoop]: trace histogram [33, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:01:32,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-24 03:01:32,440 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:01:32,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:01:32,440 INFO L85 PathProgramCache]: Analyzing trace with hash -686764748, now seen corresponding path program 36 times [2022-02-24 03:01:32,440 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:01:32,440 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596547910] [2022-02-24 03:01:32,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:01:32,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:01:32,744 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:01:32,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:32,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:01:32,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:32,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:01:33,526 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:01:33,527 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [596547910] [2022-02-24 03:01:33,527 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [596547910] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:01:33,527 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:01:33,527 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-02-24 03:01:33,527 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671317447] [2022-02-24 03:01:33,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:01:33,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-02-24 03:01:33,527 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:01:33,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-02-24 03:01:33,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1630, Unknown=0, NotChecked=0, Total=1722 [2022-02-24 03:01:33,528 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 42 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 41 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) [2022-02-24 03:01:34,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:01:34,625 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2022-02-24 03:01:34,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-24 03:01:34,626 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 41 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 56 [2022-02-24 03:01:34,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:01:34,626 INFO L225 Difference]: With dead ends: 66 [2022-02-24 03:01:34,626 INFO L226 Difference]: Without dead ends: 58 [2022-02-24 03:01:34,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1330 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=255, Invalid=6065, Unknown=0, NotChecked=0, Total=6320 [2022-02-24 03:01:34,632 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 13 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 1531 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 1586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:01:34,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 153 Invalid, 1586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1531 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 03:01:34,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-02-24 03:01:34,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-02-24 03:01:34,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 53 states have internal predecessors, (55), 3 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) [2022-02-24 03:01:34,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2022-02-24 03:01:34,641 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 56 [2022-02-24 03:01:34,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:01:34,641 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2022-02-24 03:01:34,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 41 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) [2022-02-24 03:01:34,641 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2022-02-24 03:01:34,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-02-24 03:01:34,642 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:01:34,642 INFO L514 BasicCegarLoop]: trace histogram [34, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:01:34,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-24 03:01:34,642 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:01:34,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:01:34,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1257637655, now seen corresponding path program 37 times [2022-02-24 03:01:34,642 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:01:34,643 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016567117] [2022-02-24 03:01:34,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:01:34,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:01:34,964 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:01:34,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:35,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:01:35,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:35,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:01:35,768 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:01:35,768 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016567117] [2022-02-24 03:01:35,768 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2016567117] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:01:35,768 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:01:35,768 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-02-24 03:01:35,768 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713582567] [2022-02-24 03:01:35,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:01:35,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-24 03:01:35,768 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:01:35,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-24 03:01:35,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1712, Unknown=0, NotChecked=0, Total=1806 [2022-02-24 03:01:35,771 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 43 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 42 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) [2022-02-24 03:01:36,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:01:36,955 INFO L93 Difference]: Finished difference Result 67 states and 70 transitions. [2022-02-24 03:01:36,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-24 03:01:36,955 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 42 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 57 [2022-02-24 03:01:36,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:01:36,955 INFO L225 Difference]: With dead ends: 67 [2022-02-24 03:01:36,955 INFO L226 Difference]: Without dead ends: 59 [2022-02-24 03:01:36,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 12 SyntacticMatches, 6 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1401 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=261, Invalid=6381, Unknown=0, NotChecked=0, Total=6642 [2022-02-24 03:01:36,957 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 13 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 1800 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 1856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:01:36,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 183 Invalid, 1856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1800 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 03:01:36,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-02-24 03:01:36,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-02-24 03:01:36,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.037037037037037) internal successors, (56), 54 states have internal predecessors, (56), 3 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) [2022-02-24 03:01:36,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2022-02-24 03:01:36,963 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 57 [2022-02-24 03:01:36,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:01:36,963 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2022-02-24 03:01:36,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 42 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) [2022-02-24 03:01:36,963 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2022-02-24 03:01:36,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 03:01:36,964 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:01:36,964 INFO L514 BasicCegarLoop]: trace histogram [35, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:01:36,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-24 03:01:36,964 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:01:36,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:01:36,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1774828588, now seen corresponding path program 38 times [2022-02-24 03:01:36,965 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:01:36,965 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1997942797] [2022-02-24 03:01:36,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:01:36,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:01:37,289 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:01:37,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:37,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:01:37,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:37,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:01:38,076 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:01:38,077 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1997942797] [2022-02-24 03:01:38,077 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1997942797] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:01:38,077 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:01:38,077 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-02-24 03:01:38,077 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430479517] [2022-02-24 03:01:38,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:01:38,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-02-24 03:01:38,077 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:01:38,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-02-24 03:01:38,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1796, Unknown=0, NotChecked=0, Total=1892 [2022-02-24 03:01:38,079 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 44 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 43 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) [2022-02-24 03:01:39,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:01:39,216 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2022-02-24 03:01:39,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-24 03:01:39,216 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 43 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 [2022-02-24 03:01:39,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:01:39,217 INFO L225 Difference]: With dead ends: 68 [2022-02-24 03:01:39,217 INFO L226 Difference]: Without dead ends: 60 [2022-02-24 03:01:39,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 11 SyntacticMatches, 7 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1451 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=267, Invalid=6705, Unknown=0, NotChecked=0, Total=6972 [2022-02-24 03:01:39,218 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 13 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 1769 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 1826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:01:39,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 173 Invalid, 1826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1769 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 03:01:39,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-02-24 03:01:39,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-02-24 03:01:39,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 states have internal predecessors, (57), 3 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) [2022-02-24 03:01:39,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2022-02-24 03:01:39,225 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 58 [2022-02-24 03:01:39,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:01:39,225 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2022-02-24 03:01:39,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 43 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) [2022-02-24 03:01:39,225 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2022-02-24 03:01:39,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-24 03:01:39,226 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:01:39,226 INFO L514 BasicCegarLoop]: trace histogram [36, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:01:39,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-02-24 03:01:39,226 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:01:39,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:01:39,226 INFO L85 PathProgramCache]: Analyzing trace with hash -627878327, now seen corresponding path program 39 times [2022-02-24 03:01:39,226 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:01:39,226 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [225061216] [2022-02-24 03:01:39,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:01:39,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:01:39,518 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:01:39,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:39,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:01:39,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:39,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:01:40,324 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:01:40,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [225061216] [2022-02-24 03:01:40,325 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [225061216] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:01:40,325 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:01:40,327 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-02-24 03:01:40,327 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451935260] [2022-02-24 03:01:40,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:01:40,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-24 03:01:40,328 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:01:40,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-24 03:01:40,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1882, Unknown=0, NotChecked=0, Total=1980 [2022-02-24 03:01:40,328 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 45 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 44 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) [2022-02-24 03:01:41,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:01:41,594 INFO L93 Difference]: Finished difference Result 69 states and 72 transitions. [2022-02-24 03:01:41,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-24 03:01:41,595 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 44 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 59 [2022-02-24 03:01:41,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:01:41,595 INFO L225 Difference]: With dead ends: 69 [2022-02-24 03:01:41,595 INFO L226 Difference]: Without dead ends: 61 [2022-02-24 03:01:41,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 10 SyntacticMatches, 8 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1524 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=273, Invalid=7037, Unknown=0, NotChecked=0, Total=7310 [2022-02-24 03:01:41,596 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 13 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 2094 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 2152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 2094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:01:41,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 208 Invalid, 2152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 2094 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 03:01:41,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-02-24 03:01:41,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-02-24 03:01:41,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 3 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) [2022-02-24 03:01:41,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2022-02-24 03:01:41,602 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 59 [2022-02-24 03:01:41,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:01:41,603 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2022-02-24 03:01:41,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 44 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) [2022-02-24 03:01:41,603 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2022-02-24 03:01:41,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-24 03:01:41,603 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:01:41,603 INFO L514 BasicCegarLoop]: trace histogram [37, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:01:41,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-02-24 03:01:41,604 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:01:41,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:01:41,604 INFO L85 PathProgramCache]: Analyzing trace with hash 567841396, now seen corresponding path program 40 times [2022-02-24 03:01:41,604 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:01:41,604 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1055125330] [2022-02-24 03:01:41,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:01:41,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:01:41,907 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:01:41,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:41,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:01:41,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:41,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:01:42,779 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:01:42,780 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1055125330] [2022-02-24 03:01:42,780 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1055125330] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:01:42,780 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:01:42,780 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-02-24 03:01:42,780 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106698575] [2022-02-24 03:01:42,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:01:42,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-24 03:01:42,780 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:01:42,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-24 03:01:42,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1970, Unknown=0, NotChecked=0, Total=2070 [2022-02-24 03:01:42,781 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 46 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 45 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) [2022-02-24 03:01:44,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:01:44,065 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2022-02-24 03:01:44,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-24 03:01:44,066 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 45 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 60 [2022-02-24 03:01:44,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:01:44,066 INFO L225 Difference]: With dead ends: 70 [2022-02-24 03:01:44,066 INFO L226 Difference]: Without dead ends: 62 [2022-02-24 03:01:44,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 10 SyntacticMatches, 8 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1587 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=279, Invalid=7377, Unknown=0, NotChecked=0, Total=7656 [2022-02-24 03:01:44,067 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 13 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 2064 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 2123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 2064 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:01:44,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 198 Invalid, 2123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 2064 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 03:01:44,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-02-24 03:01:44,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-02-24 03:01:44,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 states have internal predecessors, (59), 3 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) [2022-02-24 03:01:44,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2022-02-24 03:01:44,075 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 60 [2022-02-24 03:01:44,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:01:44,075 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2022-02-24 03:01:44,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 45 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) [2022-02-24 03:01:44,075 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2022-02-24 03:01:44,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-24 03:01:44,076 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:01:44,076 INFO L514 BasicCegarLoop]: trace histogram [38, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:01:44,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-02-24 03:01:44,076 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:01:44,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:01:44,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1019552855, now seen corresponding path program 41 times [2022-02-24 03:01:44,076 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:01:44,076 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [145556728] [2022-02-24 03:01:44,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:01:44,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:01:44,397 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:01:44,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:44,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:01:44,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:44,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:01:45,258 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:01:45,259 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [145556728] [2022-02-24 03:01:45,259 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [145556728] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:01:45,259 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:01:45,259 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-02-24 03:01:45,259 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876102743] [2022-02-24 03:01:45,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:01:45,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-24 03:01:45,260 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:01:45,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-24 03:01:45,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=2060, Unknown=0, NotChecked=0, Total=2162 [2022-02-24 03:01:45,260 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand has 47 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 46 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) [2022-02-24 03:01:46,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:01:46,617 INFO L93 Difference]: Finished difference Result 71 states and 74 transitions. [2022-02-24 03:01:46,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-24 03:01:46,617 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 46 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 [2022-02-24 03:01:46,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:01:46,618 INFO L225 Difference]: With dead ends: 71 [2022-02-24 03:01:46,618 INFO L226 Difference]: Without dead ends: 63 [2022-02-24 03:01:46,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 12 SyntacticMatches, 6 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1651 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=285, Invalid=7725, Unknown=0, NotChecked=0, Total=8010 [2022-02-24 03:01:46,619 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 13 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 2198 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 2258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 2198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:01:46,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 208 Invalid, 2258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 2198 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 03:01:46,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-02-24 03:01:46,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-02-24 03:01:46,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 58 states have internal predecessors, (60), 3 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) [2022-02-24 03:01:46,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2022-02-24 03:01:46,626 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 61 [2022-02-24 03:01:46,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:01:46,627 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2022-02-24 03:01:46,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 46 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) [2022-02-24 03:01:46,627 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2022-02-24 03:01:46,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-24 03:01:46,627 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:01:46,627 INFO L514 BasicCegarLoop]: trace histogram [39, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:01:46,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-02-24 03:01:46,628 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:01:46,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:01:46,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1310832916, now seen corresponding path program 42 times [2022-02-24 03:01:46,628 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:01:46,628 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2004479360] [2022-02-24 03:01:46,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:01:46,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:01:46,937 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:01:46,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:46,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:01:46,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:46,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:01:47,927 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:01:47,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2004479360] [2022-02-24 03:01:47,928 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2004479360] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:01:47,928 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:01:47,928 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-02-24 03:01:47,928 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348242778] [2022-02-24 03:01:47,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:01:47,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-02-24 03:01:47,928 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:01:47,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-02-24 03:01:47,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=2152, Unknown=0, NotChecked=0, Total=2256 [2022-02-24 03:01:47,929 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 48 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 47 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) [2022-02-24 03:01:49,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:01:49,369 INFO L93 Difference]: Finished difference Result 74 states and 78 transitions. [2022-02-24 03:01:49,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-24 03:01:49,370 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 47 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 62 [2022-02-24 03:01:49,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:01:49,370 INFO L225 Difference]: With dead ends: 74 [2022-02-24 03:01:49,370 INFO L226 Difference]: Without dead ends: 66 [2022-02-24 03:01:49,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 12 SyntacticMatches, 6 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1705 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=291, Invalid=8081, Unknown=0, NotChecked=0, Total=8372 [2022-02-24 03:01:49,371 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 15 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 2373 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 2437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 2373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 03:01:49,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 213 Invalid, 2437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 2373 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 03:01:49,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-02-24 03:01:49,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2022-02-24 03:01:49,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 states have internal predecessors, (62), 3 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) [2022-02-24 03:01:49,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2022-02-24 03:01:49,381 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 62 [2022-02-24 03:01:49,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:01:49,381 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2022-02-24 03:01:49,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 47 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) [2022-02-24 03:01:49,381 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2022-02-24 03:01:49,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-24 03:01:49,382 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:01:49,382 INFO L514 BasicCegarLoop]: trace histogram [40, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:01:49,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-02-24 03:01:49,382 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:01:49,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:01:49,382 INFO L85 PathProgramCache]: Analyzing trace with hash 538347785, now seen corresponding path program 43 times [2022-02-24 03:01:49,383 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:01:49,383 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1456233457] [2022-02-24 03:01:49,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:01:49,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:01:49,601 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:01:49,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:49,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:01:49,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:49,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:01:50,581 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:01:50,581 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1456233457] [2022-02-24 03:01:50,581 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1456233457] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:01:50,581 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:01:50,581 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-02-24 03:01:50,581 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336098389] [2022-02-24 03:01:50,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:01:50,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-02-24 03:01:50,582 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:01:50,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-02-24 03:01:50,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=2246, Unknown=0, NotChecked=0, Total=2352 [2022-02-24 03:01:50,582 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 49 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 48 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) [2022-02-24 03:01:52,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:01:52,120 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2022-02-24 03:01:52,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-24 03:01:52,123 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 48 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 [2022-02-24 03:01:52,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:01:52,124 INFO L225 Difference]: With dead ends: 72 [2022-02-24 03:01:52,124 INFO L226 Difference]: Without dead ends: 67 [2022-02-24 03:01:52,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 10 SyntacticMatches, 7 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1793 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=297, Invalid=8445, Unknown=0, NotChecked=0, Total=8742 [2022-02-24 03:01:52,125 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 14 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 2564 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 2627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 2564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 03:01:52,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 228 Invalid, 2627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 2564 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 03:01:52,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-02-24 03:01:52,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-02-24 03:01:52,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.032258064516129) internal successors, (64), 62 states have internal predecessors, (64), 3 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) [2022-02-24 03:01:52,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2022-02-24 03:01:52,133 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 63 [2022-02-24 03:01:52,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:01:52,133 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2022-02-24 03:01:52,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 48 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) [2022-02-24 03:01:52,134 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2022-02-24 03:01:52,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 03:01:52,134 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:01:52,134 INFO L514 BasicCegarLoop]: trace histogram [40, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:01:52,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-02-24 03:01:52,134 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:01:52,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:01:52,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1315230787, now seen corresponding path program 44 times [2022-02-24 03:01:52,135 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:01:52,135 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1507237121] [2022-02-24 03:01:52,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:01:52,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:01:52,431 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:01:52,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:52,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:01:52,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:52,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:01:53,498 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:01:53,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1507237121] [2022-02-24 03:01:53,499 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1507237121] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:01:53,499 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:01:53,499 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-02-24 03:01:53,499 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601347129] [2022-02-24 03:01:53,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:01:53,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-02-24 03:01:53,499 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:01:53,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-02-24 03:01:53,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=2342, Unknown=0, NotChecked=0, Total=2450 [2022-02-24 03:01:53,500 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand has 50 states, 50 states have (on average 1.24) internal successors, (62), 49 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) [2022-02-24 03:01:55,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:01:55,020 INFO L93 Difference]: Finished difference Result 76 states and 79 transitions. [2022-02-24 03:01:55,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-24 03:01:55,020 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.24) internal successors, (62), 49 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 [2022-02-24 03:01:55,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:01:55,020 INFO L225 Difference]: With dead ends: 76 [2022-02-24 03:01:55,020 INFO L226 Difference]: Without dead ends: 68 [2022-02-24 03:01:55,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 10 SyntacticMatches, 10 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1871 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=303, Invalid=8817, Unknown=0, NotChecked=0, Total=9120 [2022-02-24 03:01:55,022 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 14 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 2432 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 2496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 2432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 03:01:55,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 208 Invalid, 2496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 2432 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 03:01:55,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-02-24 03:01:55,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-02-24 03:01:55,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 3 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) [2022-02-24 03:01:55,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2022-02-24 03:01:55,033 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 66 [2022-02-24 03:01:55,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:01:55,033 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2022-02-24 03:01:55,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.24) internal successors, (62), 49 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) [2022-02-24 03:01:55,034 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2022-02-24 03:01:55,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-02-24 03:01:55,034 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:01:55,034 INFO L514 BasicCegarLoop]: trace histogram [41, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:01:55,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-02-24 03:01:55,034 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:01:55,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:01:55,035 INFO L85 PathProgramCache]: Analyzing trace with hash 674681786, now seen corresponding path program 45 times [2022-02-24 03:01:55,035 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:01:55,035 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [842197601] [2022-02-24 03:01:55,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:01:55,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:01:55,329 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:01:55,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:55,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:01:55,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:55,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:01:56,373 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:01:56,373 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [842197601] [2022-02-24 03:01:56,373 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [842197601] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:01:56,373 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:01:56,373 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-02-24 03:01:56,373 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217398014] [2022-02-24 03:01:56,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:01:56,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-02-24 03:01:56,374 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:01:56,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-02-24 03:01:56,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=2440, Unknown=0, NotChecked=0, Total=2550 [2022-02-24 03:01:56,374 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 51 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 50 states have internal predecessors, (63), 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) [2022-02-24 03:01:58,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:01:58,070 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2022-02-24 03:01:58,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-24 03:01:58,070 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 50 states have internal predecessors, (63), 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 67 [2022-02-24 03:01:58,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:01:58,071 INFO L225 Difference]: With dead ends: 77 [2022-02-24 03:01:58,071 INFO L226 Difference]: Without dead ends: 69 [2022-02-24 03:01:58,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 12 SyntacticMatches, 8 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1917 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=309, Invalid=9197, Unknown=0, NotChecked=0, Total=9506 [2022-02-24 03:01:58,072 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 14 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 2916 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 2981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 2916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:01:58,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 253 Invalid, 2981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 2916 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 03:01:58,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-02-24 03:01:58,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-02-24 03:01:58,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.03125) internal successors, (66), 64 states have internal predecessors, (66), 3 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) [2022-02-24 03:01:58,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2022-02-24 03:01:58,080 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 67 [2022-02-24 03:01:58,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:01:58,080 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2022-02-24 03:01:58,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 50 states have internal predecessors, (63), 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) [2022-02-24 03:01:58,080 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2022-02-24 03:01:58,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 03:01:58,080 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:01:58,080 INFO L514 BasicCegarLoop]: trace histogram [42, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:01:58,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-02-24 03:01:58,081 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:01:58,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:01:58,081 INFO L85 PathProgramCache]: Analyzing trace with hash -2002468061, now seen corresponding path program 46 times [2022-02-24 03:01:58,081 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:01:58,081 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1163037934] [2022-02-24 03:01:58,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:01:58,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:01:58,433 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:01:58,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:58,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:01:58,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:01:58,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:01:59,527 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:01:59,527 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1163037934] [2022-02-24 03:01:59,527 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1163037934] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:01:59,527 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:01:59,527 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-02-24 03:01:59,527 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278496299] [2022-02-24 03:01:59,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:01:59,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-02-24 03:01:59,527 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:01:59,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-02-24 03:01:59,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=2540, Unknown=0, NotChecked=0, Total=2652 [2022-02-24 03:01:59,528 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 52 states, 52 states have (on average 1.2307692307692308) internal successors, (64), 51 states have internal predecessors, (64), 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) [2022-02-24 03:02:01,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:02:01,312 INFO L93 Difference]: Finished difference Result 78 states and 81 transitions. [2022-02-24 03:02:01,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-24 03:02:01,312 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.2307692307692308) internal successors, (64), 51 states have internal predecessors, (64), 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 68 [2022-02-24 03:02:01,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:02:01,313 INFO L225 Difference]: With dead ends: 78 [2022-02-24 03:02:01,313 INFO L226 Difference]: Without dead ends: 70 [2022-02-24 03:02:01,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 13 SyntacticMatches, 7 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1986 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=315, Invalid=9585, Unknown=0, NotChecked=0, Total=9900 [2022-02-24 03:02:01,314 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 14 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 2977 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 3043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 2977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 03:02:01,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 253 Invalid, 3043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 2977 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 03:02:01,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-02-24 03:02:01,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-02-24 03:02:01,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 65 states have internal predecessors, (67), 3 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) [2022-02-24 03:02:01,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2022-02-24 03:02:01,326 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 68 [2022-02-24 03:02:01,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:02:01,326 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2022-02-24 03:02:01,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.2307692307692308) internal successors, (64), 51 states have internal predecessors, (64), 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) [2022-02-24 03:02:01,326 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2022-02-24 03:02:01,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-24 03:02:01,327 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:02:01,327 INFO L514 BasicCegarLoop]: trace histogram [43, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:02:01,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-02-24 03:02:01,327 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:02:01,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:02:01,327 INFO L85 PathProgramCache]: Analyzing trace with hash 905232602, now seen corresponding path program 47 times [2022-02-24 03:02:01,327 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:02:01,327 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [263468292] [2022-02-24 03:02:01,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:02:01,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:02:01,669 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:02:01,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:02:01,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:02:01,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:02:01,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:02:02,847 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:02:02,847 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [263468292] [2022-02-24 03:02:02,847 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [263468292] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:02:02,847 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:02:02,847 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-02-24 03:02:02,847 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407813943] [2022-02-24 03:02:02,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:02:02,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-02-24 03:02:02,848 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:02:02,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-02-24 03:02:02,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=2642, Unknown=0, NotChecked=0, Total=2756 [2022-02-24 03:02:02,849 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 53 states, 53 states have (on average 1.2264150943396226) internal successors, (65), 52 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) [2022-02-24 03:02:04,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:02:04,566 INFO L93 Difference]: Finished difference Result 79 states and 82 transitions. [2022-02-24 03:02:04,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-24 03:02:04,566 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.2264150943396226) internal successors, (65), 52 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 [2022-02-24 03:02:04,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:02:04,567 INFO L225 Difference]: With dead ends: 79 [2022-02-24 03:02:04,567 INFO L226 Difference]: Without dead ends: 71 [2022-02-24 03:02:04,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 13 SyntacticMatches, 7 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2056 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=321, Invalid=9981, Unknown=0, NotChecked=0, Total=10302 [2022-02-24 03:02:04,569 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 14 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 2638 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 2705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 2638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:02:04,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 213 Invalid, 2705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 2638 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 03:02:04,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-02-24 03:02:04,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-02-24 03:02:04,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0303030303030303) internal successors, (68), 66 states have internal predecessors, (68), 3 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) [2022-02-24 03:02:04,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2022-02-24 03:02:04,576 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 69 [2022-02-24 03:02:04,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:02:04,576 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2022-02-24 03:02:04,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.2264150943396226) internal successors, (65), 52 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) [2022-02-24 03:02:04,577 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2022-02-24 03:02:04,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-24 03:02:04,577 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:02:04,577 INFO L514 BasicCegarLoop]: trace histogram [44, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:02:04,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-02-24 03:02:04,577 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:02:04,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:02:04,578 INFO L85 PathProgramCache]: Analyzing trace with hash 849639939, now seen corresponding path program 48 times [2022-02-24 03:02:04,578 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:02:04,578 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1432475373] [2022-02-24 03:02:04,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:02:04,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:02:04,898 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:02:04,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:02:04,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:02:04,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:02:04,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:02:06,063 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:02:06,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1432475373] [2022-02-24 03:02:06,063 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1432475373] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:02:06,064 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:02:06,064 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-02-24 03:02:06,064 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928055701] [2022-02-24 03:02:06,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:02:06,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-24 03:02:06,064 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:02:06,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-24 03:02:06,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=2746, Unknown=0, NotChecked=0, Total=2862 [2022-02-24 03:02:06,065 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand has 54 states, 54 states have (on average 1.2222222222222223) internal successors, (66), 53 states have internal predecessors, (66), 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) [2022-02-24 03:02:07,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:02:07,854 INFO L93 Difference]: Finished difference Result 80 states and 83 transitions. [2022-02-24 03:02:07,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-24 03:02:07,854 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.2222222222222223) internal successors, (66), 53 states have internal predecessors, (66), 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 70 [2022-02-24 03:02:07,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:02:07,855 INFO L225 Difference]: With dead ends: 80 [2022-02-24 03:02:07,855 INFO L226 Difference]: Without dead ends: 72 [2022-02-24 03:02:07,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 12 SyntacticMatches, 8 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2138 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=327, Invalid=10385, Unknown=0, NotChecked=0, Total=10712 [2022-02-24 03:02:07,856 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 14 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 2742 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 2810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 2742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:02:07,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 218 Invalid, 2810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 2742 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 03:02:07,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-02-24 03:02:07,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-02-24 03:02:07,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 3 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) [2022-02-24 03:02:07,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2022-02-24 03:02:07,864 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 70 [2022-02-24 03:02:07,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:02:07,865 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2022-02-24 03:02:07,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.2222222222222223) internal successors, (66), 53 states have internal predecessors, (66), 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) [2022-02-24 03:02:07,865 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2022-02-24 03:02:07,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-24 03:02:07,865 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:02:07,865 INFO L514 BasicCegarLoop]: trace histogram [45, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:02:07,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-02-24 03:02:07,866 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:02:07,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:02:07,866 INFO L85 PathProgramCache]: Analyzing trace with hash -873732614, now seen corresponding path program 49 times [2022-02-24 03:02:07,866 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:02:07,866 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [677646761] [2022-02-24 03:02:07,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:02:07,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:02:08,200 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:02:08,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:02:08,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:02:08,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:02:08,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:02:09,432 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:02:09,432 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [677646761] [2022-02-24 03:02:09,433 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [677646761] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:02:09,433 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:02:09,433 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-02-24 03:02:09,433 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582044261] [2022-02-24 03:02:09,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:02:09,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-02-24 03:02:09,433 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:02:09,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-02-24 03:02:09,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=2852, Unknown=0, NotChecked=0, Total=2970 [2022-02-24 03:02:09,434 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 55 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 54 states have internal predecessors, (67), 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) [2022-02-24 03:02:11,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:02:11,400 INFO L93 Difference]: Finished difference Result 81 states and 84 transitions. [2022-02-24 03:02:11,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-24 03:02:11,401 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 54 states have internal predecessors, (67), 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 71 [2022-02-24 03:02:11,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:02:11,401 INFO L225 Difference]: With dead ends: 81 [2022-02-24 03:02:11,402 INFO L226 Difference]: Without dead ends: 73 [2022-02-24 03:02:11,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 10 SyntacticMatches, 10 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2221 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=333, Invalid=10797, Unknown=0, NotChecked=0, Total=11130 [2022-02-24 03:02:11,403 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 14 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 3264 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 3333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 3264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 03:02:11,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 263 Invalid, 3333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 3264 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 03:02:11,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-02-24 03:02:11,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-02-24 03:02:11,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 3 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) [2022-02-24 03:02:11,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2022-02-24 03:02:11,415 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 71 [2022-02-24 03:02:11,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:02:11,415 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2022-02-24 03:02:11,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 54 states have internal predecessors, (67), 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) [2022-02-24 03:02:11,415 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2022-02-24 03:02:11,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 03:02:11,416 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:02:11,416 INFO L514 BasicCegarLoop]: trace histogram [46, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:02:11,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-02-24 03:02:11,416 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:02:11,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:02:11,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1536293091, now seen corresponding path program 50 times [2022-02-24 03:02:11,417 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:02:11,417 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1089635242] [2022-02-24 03:02:11,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:02:11,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:02:11,771 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:02:11,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:02:11,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:02:11,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:02:11,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:02:12,980 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:02:12,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1089635242] [2022-02-24 03:02:12,981 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1089635242] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:02:12,981 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:02:12,981 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-02-24 03:02:12,982 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823156520] [2022-02-24 03:02:12,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:02:12,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-02-24 03:02:12,982 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:02:12,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-02-24 03:02:12,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=2960, Unknown=0, NotChecked=0, Total=3080 [2022-02-24 03:02:12,983 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 56 states, 56 states have (on average 1.2142857142857142) internal successors, (68), 55 states have internal predecessors, (68), 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) [2022-02-24 03:02:14,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:02:14,946 INFO L93 Difference]: Finished difference Result 82 states and 85 transitions. [2022-02-24 03:02:14,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-24 03:02:14,946 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.2142857142857142) internal successors, (68), 55 states have internal predecessors, (68), 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 [2022-02-24 03:02:14,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:02:14,947 INFO L225 Difference]: With dead ends: 82 [2022-02-24 03:02:14,947 INFO L226 Difference]: Without dead ends: 74 [2022-02-24 03:02:14,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 13 SyntacticMatches, 7 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2283 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=339, Invalid=11217, Unknown=0, NotChecked=0, Total=11556 [2022-02-24 03:02:14,952 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 14 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 3168 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 3238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 3168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 03:02:14,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 248 Invalid, 3238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 3168 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 03:02:14,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-02-24 03:02:14,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-02-24 03:02:14,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 3 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) [2022-02-24 03:02:14,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2022-02-24 03:02:14,960 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 72 [2022-02-24 03:02:14,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:02:14,960 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2022-02-24 03:02:14,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.2142857142857142) internal successors, (68), 55 states have internal predecessors, (68), 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) [2022-02-24 03:02:14,960 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2022-02-24 03:02:14,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-24 03:02:14,961 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:02:14,961 INFO L514 BasicCegarLoop]: trace histogram [47, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:02:14,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-02-24 03:02:14,961 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:02:14,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:02:14,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1062321382, now seen corresponding path program 51 times [2022-02-24 03:02:14,961 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:02:14,961 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2022551582] [2022-02-24 03:02:14,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:02:14,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:02:15,299 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:02:15,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:02:15,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:02:15,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:02:15,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:02:16,570 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:02:16,570 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2022551582] [2022-02-24 03:02:16,570 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2022551582] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:02:16,570 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:02:16,571 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-02-24 03:02:16,571 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700293239] [2022-02-24 03:02:16,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:02:16,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-02-24 03:02:16,571 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:02:16,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-02-24 03:02:16,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=3070, Unknown=0, NotChecked=0, Total=3192 [2022-02-24 03:02:16,573 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand has 57 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 56 states have internal predecessors, (69), 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) [2022-02-24 03:02:18,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:02:18,574 INFO L93 Difference]: Finished difference Result 83 states and 86 transitions. [2022-02-24 03:02:18,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-24 03:02:18,574 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 56 states have internal predecessors, (69), 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 73 [2022-02-24 03:02:18,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:02:18,575 INFO L225 Difference]: With dead ends: 83 [2022-02-24 03:02:18,575 INFO L226 Difference]: Without dead ends: 75 [2022-02-24 03:02:18,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 10 SyntacticMatches, 10 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2368 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=345, Invalid=11645, Unknown=0, NotChecked=0, Total=11990 [2022-02-24 03:02:18,576 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 14 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 3120 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 3191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 3120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 03:02:18,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 238 Invalid, 3191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 3120 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 03:02:18,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-02-24 03:02:18,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-02-24 03:02:18,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 70 states have internal predecessors, (72), 3 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) [2022-02-24 03:02:18,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2022-02-24 03:02:18,587 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 73 [2022-02-24 03:02:18,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:02:18,587 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2022-02-24 03:02:18,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 56 states have internal predecessors, (69), 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) [2022-02-24 03:02:18,587 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2022-02-24 03:02:18,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 03:02:18,588 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:02:18,588 INFO L514 BasicCegarLoop]: trace histogram [48, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:02:18,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-02-24 03:02:18,588 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:02:18,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:02:18,588 INFO L85 PathProgramCache]: Analyzing trace with hash -14991421, now seen corresponding path program 52 times [2022-02-24 03:02:18,588 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:02:18,588 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [780287285] [2022-02-24 03:02:18,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:02:18,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:02:18,911 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:02:18,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:02:18,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:02:18,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:02:18,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:02:20,190 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:02:20,190 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [780287285] [2022-02-24 03:02:20,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [780287285] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:02:20,190 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:02:20,190 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-02-24 03:02:20,190 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469456254] [2022-02-24 03:02:20,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:02:20,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-02-24 03:02:20,191 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:02:20,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-02-24 03:02:20,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=3182, Unknown=0, NotChecked=0, Total=3306 [2022-02-24 03:02:20,192 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 58 states, 58 states have (on average 1.206896551724138) internal successors, (70), 57 states have internal predecessors, (70), 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) [2022-02-24 03:02:22,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:02:22,499 INFO L93 Difference]: Finished difference Result 84 states and 87 transitions. [2022-02-24 03:02:22,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-24 03:02:22,500 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.206896551724138) internal successors, (70), 57 states have internal predecessors, (70), 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 74 [2022-02-24 03:02:22,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:02:22,500 INFO L225 Difference]: With dead ends: 84 [2022-02-24 03:02:22,500 INFO L226 Difference]: Without dead ends: 76 [2022-02-24 03:02:22,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 12 SyntacticMatches, 8 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2421 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=351, Invalid=12081, Unknown=0, NotChecked=0, Total=12432 [2022-02-24 03:02:22,501 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 14 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 3728 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 3800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 3728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:02:22,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 288 Invalid, 3800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 3728 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-24 03:02:22,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-02-24 03:02:22,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2022-02-24 03:02:22,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 states have internal predecessors, (73), 3 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) [2022-02-24 03:02:22,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2022-02-24 03:02:22,513 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 74 [2022-02-24 03:02:22,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:02:22,513 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2022-02-24 03:02:22,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.206896551724138) internal successors, (70), 57 states have internal predecessors, (70), 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) [2022-02-24 03:02:22,513 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2022-02-24 03:02:22,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-02-24 03:02:22,513 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:02:22,513 INFO L514 BasicCegarLoop]: trace histogram [49, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:02:22,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-02-24 03:02:22,514 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:02:22,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:02:22,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1907500998, now seen corresponding path program 53 times [2022-02-24 03:02:22,514 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:02:22,514 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597644822] [2022-02-24 03:02:22,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:02:22,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:02:22,856 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:02:22,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:02:22,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:02:22,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:02:22,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:02:24,179 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:02:24,179 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597644822] [2022-02-24 03:02:24,179 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1597644822] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:02:24,179 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:02:24,179 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-02-24 03:02:24,180 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494931013] [2022-02-24 03:02:24,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:02:24,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-02-24 03:02:24,180 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:02:24,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-02-24 03:02:24,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=3296, Unknown=0, NotChecked=0, Total=3422 [2022-02-24 03:02:24,181 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 59 states, 59 states have (on average 1.2033898305084745) internal successors, (71), 58 states have internal predecessors, (71), 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) [2022-02-24 03:02:26,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:02:26,511 INFO L93 Difference]: Finished difference Result 87 states and 91 transitions. [2022-02-24 03:02:26,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-02-24 03:02:26,512 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.2033898305084745) internal successors, (71), 58 states have internal predecessors, (71), 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 75 [2022-02-24 03:02:26,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:02:26,512 INFO L225 Difference]: With dead ends: 87 [2022-02-24 03:02:26,512 INFO L226 Difference]: Without dead ends: 79 [2022-02-24 03:02:26,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 12 SyntacticMatches, 8 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2497 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=357, Invalid=12525, Unknown=0, NotChecked=0, Total=12882 [2022-02-24 03:02:26,514 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 3674 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 3750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 3674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:02:26,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 268 Invalid, 3750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 3674 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-24 03:02:26,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-02-24 03:02:26,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2022-02-24 03:02:26,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 73 states have internal predecessors, (75), 3 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) [2022-02-24 03:02:26,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2022-02-24 03:02:26,526 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 75 [2022-02-24 03:02:26,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:02:26,526 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2022-02-24 03:02:26,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.2033898305084745) internal successors, (71), 58 states have internal predecessors, (71), 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) [2022-02-24 03:02:26,527 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2022-02-24 03:02:26,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-24 03:02:26,527 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:02:26,527 INFO L514 BasicCegarLoop]: trace histogram [50, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:02:26,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-02-24 03:02:26,528 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:02:26,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:02:26,528 INFO L85 PathProgramCache]: Analyzing trace with hash -445755741, now seen corresponding path program 54 times [2022-02-24 03:02:26,528 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:02:26,528 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1095091276] [2022-02-24 03:02:26,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:02:26,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:02:26,798 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:02:26,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:02:26,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:02:26,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:02:26,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:02:28,318 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:02:28,318 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1095091276] [2022-02-24 03:02:28,319 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1095091276] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:02:28,319 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:02:28,319 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-02-24 03:02:28,319 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484680403] [2022-02-24 03:02:28,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:02:28,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-02-24 03:02:28,319 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:02:28,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-02-24 03:02:28,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=3412, Unknown=0, NotChecked=0, Total=3540 [2022-02-24 03:02:28,320 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 60 states, 60 states have (on average 1.2) internal successors, (72), 59 states have internal predecessors, (72), 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) [2022-02-24 03:02:30,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:02:30,758 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2022-02-24 03:02:30,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-24 03:02:30,759 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.2) internal successors, (72), 59 states have internal predecessors, (72), 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 76 [2022-02-24 03:02:30,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:02:30,759 INFO L225 Difference]: With dead ends: 85 [2022-02-24 03:02:30,759 INFO L226 Difference]: Without dead ends: 80 [2022-02-24 03:02:30,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 10 SyntacticMatches, 9 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2607 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=363, Invalid=12977, Unknown=0, NotChecked=0, Total=13340 [2022-02-24 03:02:30,761 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 15 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 3915 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 3990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 3915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:02:30,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 283 Invalid, 3990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 3915 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-24 03:02:30,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-02-24 03:02:30,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-02-24 03:02:30,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 75 states have internal predecessors, (77), 3 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) [2022-02-24 03:02:30,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2022-02-24 03:02:30,774 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 76 [2022-02-24 03:02:30,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:02:30,774 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2022-02-24 03:02:30,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.2) internal successors, (72), 59 states have internal predecessors, (72), 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) [2022-02-24 03:02:30,774 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2022-02-24 03:02:30,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-02-24 03:02:30,775 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:02:30,775 INFO L514 BasicCegarLoop]: trace histogram [50, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:02:30,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-02-24 03:02:30,775 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:02:30,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:02:30,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1333850217, now seen corresponding path program 55 times [2022-02-24 03:02:30,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:02:30,776 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829048973] [2022-02-24 03:02:30,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:02:30,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:02:31,112 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:02:31,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:02:31,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:02:31,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:02:31,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:02:32,662 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:02:32,662 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829048973] [2022-02-24 03:02:32,662 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1829048973] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:02:32,662 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:02:32,662 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-02-24 03:02:32,662 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953892694] [2022-02-24 03:02:32,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:02:32,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-02-24 03:02:32,663 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:02:32,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-02-24 03:02:32,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=3530, Unknown=0, NotChecked=0, Total=3660 [2022-02-24 03:02:32,664 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand has 61 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 60 states have internal predecessors, (75), 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) [2022-02-24 03:02:35,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:02:35,197 INFO L93 Difference]: Finished difference Result 89 states and 92 transitions. [2022-02-24 03:02:35,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-24 03:02:35,198 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 60 states have internal predecessors, (75), 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 79 [2022-02-24 03:02:35,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:02:35,198 INFO L225 Difference]: With dead ends: 89 [2022-02-24 03:02:35,198 INFO L226 Difference]: Without dead ends: 81 [2022-02-24 03:02:35,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 10 SyntacticMatches, 12 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2696 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=369, Invalid=13437, Unknown=0, NotChecked=0, Total=13806 [2022-02-24 03:02:35,199 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 15 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 4162 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 4238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 4162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:02:35,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 298 Invalid, 4238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 4162 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-24 03:02:35,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-02-24 03:02:35,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-02-24 03:02:35,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 states have internal predecessors, (78), 3 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) [2022-02-24 03:02:35,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2022-02-24 03:02:35,210 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 79 [2022-02-24 03:02:35,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:02:35,210 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2022-02-24 03:02:35,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 60 states have internal predecessors, (75), 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) [2022-02-24 03:02:35,210 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2022-02-24 03:02:35,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-24 03:02:35,210 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:02:35,210 INFO L514 BasicCegarLoop]: trace histogram [51, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:02:35,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-02-24 03:02:35,211 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:02:35,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:02:35,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1251884116, now seen corresponding path program 56 times [2022-02-24 03:02:35,211 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:02:35,211 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1222558220] [2022-02-24 03:02:35,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:02:35,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:02:35,562 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:02:35,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:02:35,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:02:35,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:02:35,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:02:37,071 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:02:37,071 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1222558220] [2022-02-24 03:02:37,071 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1222558220] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:02:37,071 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:02:37,071 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-02-24 03:02:37,071 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308856397] [2022-02-24 03:02:37,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:02:37,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-02-24 03:02:37,072 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:02:37,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-02-24 03:02:37,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=3650, Unknown=0, NotChecked=0, Total=3782 [2022-02-24 03:02:37,072 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 62 states, 62 states have (on average 1.2258064516129032) internal successors, (76), 61 states have internal predecessors, (76), 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) [2022-02-24 03:02:39,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:02:39,540 INFO L93 Difference]: Finished difference Result 90 states and 93 transitions. [2022-02-24 03:02:39,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-24 03:02:39,541 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.2258064516129032) internal successors, (76), 61 states have internal predecessors, (76), 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 80 [2022-02-24 03:02:39,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:02:39,541 INFO L225 Difference]: With dead ends: 90 [2022-02-24 03:02:39,541 INFO L226 Difference]: Without dead ends: 82 [2022-02-24 03:02:39,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 11 SyntacticMatches, 11 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2764 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=375, Invalid=13905, Unknown=0, NotChecked=0, Total=14280 [2022-02-24 03:02:39,542 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 15 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 3744 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 3821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 3744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:02:39,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 258 Invalid, 3821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 3744 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-24 03:02:39,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-02-24 03:02:39,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-02-24 03:02:39,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 77 states have (on average 1.025974025974026) internal successors, (79), 77 states have internal predecessors, (79), 3 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) [2022-02-24 03:02:39,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2022-02-24 03:02:39,554 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 80 [2022-02-24 03:02:39,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:02:39,554 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2022-02-24 03:02:39,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.2258064516129032) internal successors, (76), 61 states have internal predecessors, (76), 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) [2022-02-24 03:02:39,554 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2022-02-24 03:02:39,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-02-24 03:02:39,554 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:02:39,555 INFO L514 BasicCegarLoop]: trace histogram [52, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:02:39,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-02-24 03:02:39,555 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:02:39,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:02:39,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1289065015, now seen corresponding path program 57 times [2022-02-24 03:02:39,555 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:02:39,555 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [216256422] [2022-02-24 03:02:39,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:02:39,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:02:39,940 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:02:39,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:02:39,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:02:39,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:02:39,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:02:41,588 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:02:41,588 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [216256422] [2022-02-24 03:02:41,588 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [216256422] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:02:41,589 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:02:41,589 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-02-24 03:02:41,589 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59313736] [2022-02-24 03:02:41,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:02:41,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-02-24 03:02:41,589 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:02:41,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-02-24 03:02:41,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=3772, Unknown=0, NotChecked=0, Total=3906 [2022-02-24 03:02:41,590 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand has 63 states, 63 states have (on average 1.2222222222222223) internal successors, (77), 62 states have internal predecessors, (77), 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) [2022-02-24 03:02:44,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:02:44,273 INFO L93 Difference]: Finished difference Result 91 states and 94 transitions. [2022-02-24 03:02:44,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-24 03:02:44,274 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.2222222222222223) internal successors, (77), 62 states have internal predecessors, (77), 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 81 [2022-02-24 03:02:44,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:02:44,275 INFO L225 Difference]: With dead ends: 91 [2022-02-24 03:02:44,275 INFO L226 Difference]: Without dead ends: 83 [2022-02-24 03:02:44,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 10 SyntacticMatches, 12 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2855 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=381, Invalid=14381, Unknown=0, NotChecked=0, Total=14762 [2022-02-24 03:02:44,277 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 15 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 4240 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 4318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 4240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:02:44,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 293 Invalid, 4318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 4240 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-24 03:02:44,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-02-24 03:02:44,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-02-24 03:02:44,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 78 states have internal predecessors, (80), 3 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) [2022-02-24 03:02:44,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2022-02-24 03:02:44,294 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 81 [2022-02-24 03:02:44,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:02:44,294 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2022-02-24 03:02:44,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.2222222222222223) internal successors, (77), 62 states have internal predecessors, (77), 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) [2022-02-24 03:02:44,294 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2022-02-24 03:02:44,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-02-24 03:02:44,295 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:02:44,295 INFO L514 BasicCegarLoop]: trace histogram [53, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:02:44,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-02-24 03:02:44,295 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:02:44,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:02:44,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1545890548, now seen corresponding path program 58 times [2022-02-24 03:02:44,295 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:02:44,295 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [940816156] [2022-02-24 03:02:44,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:02:44,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:02:44,684 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:02:44,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:02:44,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:02:44,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:02:44,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:02:46,292 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:02:46,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [940816156] [2022-02-24 03:02:46,292 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [940816156] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:02:46,292 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:02:46,293 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-02-24 03:02:46,293 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732424652] [2022-02-24 03:02:46,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:02:46,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-02-24 03:02:46,293 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:02:46,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-02-24 03:02:46,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=3896, Unknown=0, NotChecked=0, Total=4032 [2022-02-24 03:02:46,294 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand has 64 states, 64 states have (on average 1.21875) internal successors, (78), 63 states have internal predecessors, (78), 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) [2022-02-24 03:02:49,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:02:49,038 INFO L93 Difference]: Finished difference Result 92 states and 95 transitions. [2022-02-24 03:02:49,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-24 03:02:49,039 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.21875) internal successors, (78), 63 states have internal predecessors, (78), 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 82 [2022-02-24 03:02:49,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:02:49,039 INFO L225 Difference]: With dead ends: 92 [2022-02-24 03:02:49,039 INFO L226 Difference]: Without dead ends: 84 [2022-02-24 03:02:49,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 14 SyntacticMatches, 8 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2914 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=387, Invalid=14865, Unknown=0, NotChecked=0, Total=15252 [2022-02-24 03:02:49,041 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 15 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 4498 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 4577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 4498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:02:49,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 308 Invalid, 4577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 4498 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-24 03:02:49,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-02-24 03:02:49,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-02-24 03:02:49,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 79 states have internal predecessors, (81), 3 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) [2022-02-24 03:02:49,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2022-02-24 03:02:49,050 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 82 [2022-02-24 03:02:49,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:02:49,050 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2022-02-24 03:02:49,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.21875) internal successors, (78), 63 states have internal predecessors, (78), 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) [2022-02-24 03:02:49,051 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2022-02-24 03:02:49,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-24 03:02:49,051 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:02:49,051 INFO L514 BasicCegarLoop]: trace histogram [54, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:02:49,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-02-24 03:02:49,051 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:02:49,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:02:49,052 INFO L85 PathProgramCache]: Analyzing trace with hash -764800215, now seen corresponding path program 59 times [2022-02-24 03:02:49,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:02:49,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1859956293] [2022-02-24 03:02:49,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:02:49,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:02:49,447 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:02:49,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:02:49,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:02:49,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:02:49,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:02:51,141 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:02:51,141 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1859956293] [2022-02-24 03:02:51,142 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1859956293] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:02:51,142 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:02:51,142 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-02-24 03:02:51,142 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155137820] [2022-02-24 03:02:51,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:02:51,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-02-24 03:02:51,142 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:02:51,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-02-24 03:02:51,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=4022, Unknown=0, NotChecked=0, Total=4160 [2022-02-24 03:02:51,143 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand has 65 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 64 states have internal predecessors, (79), 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) [2022-02-24 03:02:53,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:02:53,963 INFO L93 Difference]: Finished difference Result 93 states and 96 transitions. [2022-02-24 03:02:53,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-02-24 03:02:53,964 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 64 states have internal predecessors, (79), 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 83 [2022-02-24 03:02:53,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:02:53,964 INFO L225 Difference]: With dead ends: 93 [2022-02-24 03:02:53,964 INFO L226 Difference]: Without dead ends: 85 [2022-02-24 03:02:53,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 12 SyntacticMatches, 10 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3007 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=393, Invalid=15357, Unknown=0, NotChecked=0, Total=15750 [2022-02-24 03:02:53,965 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 15 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 4506 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 4586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 4506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:02:53,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 303 Invalid, 4586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 4506 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-24 03:02:53,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-02-24 03:02:53,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-02-24 03:02:53,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.025) internal successors, (82), 80 states have internal predecessors, (82), 3 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) [2022-02-24 03:02:53,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2022-02-24 03:02:53,979 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 83 [2022-02-24 03:02:53,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:02:53,980 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2022-02-24 03:02:53,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 64 states have internal predecessors, (79), 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) [2022-02-24 03:02:53,980 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2022-02-24 03:02:53,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-02-24 03:02:53,980 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:02:53,981 INFO L514 BasicCegarLoop]: trace histogram [55, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:02:53,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-02-24 03:02:53,981 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:02:53,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:02:53,981 INFO L85 PathProgramCache]: Analyzing trace with hash 618230164, now seen corresponding path program 60 times [2022-02-24 03:02:53,981 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:02:53,981 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [497133245] [2022-02-24 03:02:53,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:02:53,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:02:54,358 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:02:54,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:02:54,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:02:54,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:02:54,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:02:56,076 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:02:56,076 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [497133245] [2022-02-24 03:02:56,076 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [497133245] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:02:56,076 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:02:56,076 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-02-24 03:02:56,076 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323366731] [2022-02-24 03:02:56,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:02:56,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-02-24 03:02:56,077 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:02:56,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-02-24 03:02:56,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=4150, Unknown=0, NotChecked=0, Total=4290 [2022-02-24 03:02:56,077 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 66 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 65 states have internal predecessors, (80), 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) [2022-02-24 03:02:58,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:02:58,884 INFO L93 Difference]: Finished difference Result 94 states and 97 transitions. [2022-02-24 03:02:58,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-02-24 03:02:58,884 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 65 states have internal predecessors, (80), 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 84 [2022-02-24 03:02:58,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:02:58,884 INFO L225 Difference]: With dead ends: 94 [2022-02-24 03:02:58,884 INFO L226 Difference]: Without dead ends: 86 [2022-02-24 03:02:58,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 11 SyntacticMatches, 11 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3090 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=399, Invalid=15857, Unknown=0, NotChecked=0, Total=16256 [2022-02-24 03:02:58,885 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 15 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 4707 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 4788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 4707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:02:58,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 313 Invalid, 4788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 4707 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-24 03:02:58,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-02-24 03:02:58,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-02-24 03:02:58,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 81 states have internal predecessors, (83), 3 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) [2022-02-24 03:02:58,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2022-02-24 03:02:58,894 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 84 [2022-02-24 03:02:58,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:02:58,895 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2022-02-24 03:02:58,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 65 states have internal predecessors, (80), 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) [2022-02-24 03:02:58,895 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2022-02-24 03:02:58,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-02-24 03:02:58,895 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:02:58,895 INFO L514 BasicCegarLoop]: trace histogram [56, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:02:58,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-02-24 03:02:58,896 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:02:58,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:02:58,896 INFO L85 PathProgramCache]: Analyzing trace with hash 542498953, now seen corresponding path program 61 times [2022-02-24 03:02:58,896 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:02:58,896 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1082653875] [2022-02-24 03:02:58,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:02:58,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:02:59,239 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:02:59,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:02:59,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:02:59,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:02:59,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:03:00,963 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:03:00,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1082653875] [2022-02-24 03:03:00,964 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1082653875] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:03:00,964 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:03:00,964 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-02-24 03:03:00,964 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040838401] [2022-02-24 03:03:00,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:03:00,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-02-24 03:03:00,964 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:03:00,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-02-24 03:03:00,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=4280, Unknown=0, NotChecked=0, Total=4422 [2022-02-24 03:03:00,965 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand has 67 states, 67 states have (on average 1.208955223880597) internal successors, (81), 66 states have internal predecessors, (81), 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) [2022-02-24 03:03:03,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:03:03,787 INFO L93 Difference]: Finished difference Result 95 states and 98 transitions. [2022-02-24 03:03:03,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-24 03:03:03,788 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.208955223880597) internal successors, (81), 66 states have internal predecessors, (81), 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 85 [2022-02-24 03:03:03,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:03:03,788 INFO L225 Difference]: With dead ends: 95 [2022-02-24 03:03:03,788 INFO L226 Difference]: Without dead ends: 87 [2022-02-24 03:03:03,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 12 SyntacticMatches, 10 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3174 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=405, Invalid=16365, Unknown=0, NotChecked=0, Total=16770 [2022-02-24 03:03:03,790 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 15 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 4516 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 4598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 4516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:03:03,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 293 Invalid, 4598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 4516 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-24 03:03:03,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-02-24 03:03:03,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-02-24 03:03:03,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.024390243902439) internal successors, (84), 82 states have internal predecessors, (84), 3 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) [2022-02-24 03:03:03,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2022-02-24 03:03:03,801 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 85 [2022-02-24 03:03:03,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:03:03,802 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2022-02-24 03:03:03,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.208955223880597) internal successors, (81), 66 states have internal predecessors, (81), 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) [2022-02-24 03:03:03,802 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2022-02-24 03:03:03,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-02-24 03:03:03,802 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:03:03,802 INFO L514 BasicCegarLoop]: trace histogram [57, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:03:03,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-02-24 03:03:03,802 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:03:03,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:03:03,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1805168588, now seen corresponding path program 62 times [2022-02-24 03:03:03,803 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:03:03,803 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856807973] [2022-02-24 03:03:03,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:03:03,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:03:04,132 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:03:04,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:03:04,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:03:04,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:03:04,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:03:05,918 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:03:05,918 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [856807973] [2022-02-24 03:03:05,918 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [856807973] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:03:05,918 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:03:05,918 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-02-24 03:03:05,918 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204332319] [2022-02-24 03:03:05,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:03:05,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-02-24 03:03:05,919 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:03:05,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-02-24 03:03:05,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=4412, Unknown=0, NotChecked=0, Total=4556 [2022-02-24 03:03:05,919 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand has 68 states, 68 states have (on average 1.2058823529411764) internal successors, (82), 67 states have internal predecessors, (82), 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) [2022-02-24 03:03:08,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:03:08,783 INFO L93 Difference]: Finished difference Result 96 states and 99 transitions. [2022-02-24 03:03:08,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-24 03:03:08,783 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.2058823529411764) internal successors, (82), 67 states have internal predecessors, (82), 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 86 [2022-02-24 03:03:08,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:03:08,784 INFO L225 Difference]: With dead ends: 96 [2022-02-24 03:03:08,784 INFO L226 Difference]: Without dead ends: 88 [2022-02-24 03:03:08,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 10 SyntacticMatches, 12 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3270 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=411, Invalid=16881, Unknown=0, NotChecked=0, Total=17292 [2022-02-24 03:03:08,786 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 15 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 4719 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 4802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 4719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:03:08,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 303 Invalid, 4802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 4719 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-24 03:03:08,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-02-24 03:03:08,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-02-24 03:03:08,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.0240963855421688) internal successors, (85), 83 states have internal predecessors, (85), 3 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) [2022-02-24 03:03:08,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2022-02-24 03:03:08,798 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 86 [2022-02-24 03:03:08,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:03:08,798 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2022-02-24 03:03:08,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.2058823529411764) internal successors, (82), 67 states have internal predecessors, (82), 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) [2022-02-24 03:03:08,798 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2022-02-24 03:03:08,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-02-24 03:03:08,799 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:03:08,799 INFO L514 BasicCegarLoop]: trace histogram [58, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:03:08,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-02-24 03:03:08,799 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:03:08,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:03:08,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1568418327, now seen corresponding path program 63 times [2022-02-24 03:03:08,800 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:03:08,800 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1381932335] [2022-02-24 03:03:08,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:03:08,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:03:09,128 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:03:09,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:03:09,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:03:09,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:03:09,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:03:11,058 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:03:11,058 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1381932335] [2022-02-24 03:03:11,059 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1381932335] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:03:11,059 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:03:11,059 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-02-24 03:03:11,059 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770274735] [2022-02-24 03:03:11,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:03:11,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-02-24 03:03:11,059 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:03:11,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-02-24 03:03:11,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=4546, Unknown=0, NotChecked=0, Total=4692 [2022-02-24 03:03:11,060 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand has 69 states, 69 states have (on average 1.2028985507246377) internal successors, (83), 68 states have internal predecessors, (83), 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) [2022-02-24 03:03:14,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:03:14,231 INFO L93 Difference]: Finished difference Result 97 states and 100 transitions. [2022-02-24 03:03:14,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-02-24 03:03:14,232 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.2028985507246377) internal successors, (83), 68 states have internal predecessors, (83), 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 87 [2022-02-24 03:03:14,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:03:14,232 INFO L225 Difference]: With dead ends: 97 [2022-02-24 03:03:14,232 INFO L226 Difference]: Without dead ends: 89 [2022-02-24 03:03:14,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 10 SyntacticMatches, 12 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3356 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=417, Invalid=17405, Unknown=0, NotChecked=0, Total=17822 [2022-02-24 03:03:14,234 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 15 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 4858 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 4942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 4858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:03:14,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 308 Invalid, 4942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 4858 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-24 03:03:14,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-02-24 03:03:14,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-02-24 03:03:14,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 84 states have internal predecessors, (86), 3 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) [2022-02-24 03:03:14,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2022-02-24 03:03:14,247 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 87 [2022-02-24 03:03:14,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:03:14,248 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2022-02-24 03:03:14,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.2028985507246377) internal successors, (83), 68 states have internal predecessors, (83), 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) [2022-02-24 03:03:14,248 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2022-02-24 03:03:14,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-02-24 03:03:14,248 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:03:14,249 INFO L514 BasicCegarLoop]: trace histogram [59, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:03:14,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-02-24 03:03:14,249 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:03:14,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:03:14,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1475872468, now seen corresponding path program 64 times [2022-02-24 03:03:14,249 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:03:14,249 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1652859222] [2022-02-24 03:03:14,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:03:14,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:03:14,595 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:03:14,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:03:14,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:03:14,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:03:14,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:03:16,503 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:03:16,504 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1652859222] [2022-02-24 03:03:16,504 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1652859222] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:03:16,504 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:03:16,504 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-02-24 03:03:16,504 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389045880] [2022-02-24 03:03:16,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:03:16,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-02-24 03:03:16,504 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:03:16,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-02-24 03:03:16,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=4682, Unknown=0, NotChecked=0, Total=4830 [2022-02-24 03:03:16,505 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 70 states, 70 states have (on average 1.2) internal successors, (84), 69 states have internal predecessors, (84), 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) [2022-02-24 03:03:19,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:03:19,704 INFO L93 Difference]: Finished difference Result 100 states and 104 transitions. [2022-02-24 03:03:19,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-24 03:03:19,704 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.2) internal successors, (84), 69 states have internal predecessors, (84), 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 88 [2022-02-24 03:03:19,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:03:19,705 INFO L225 Difference]: With dead ends: 100 [2022-02-24 03:03:19,705 INFO L226 Difference]: Without dead ends: 92 [2022-02-24 03:03:19,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 11 SyntacticMatches, 11 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3432 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=423, Invalid=17937, Unknown=0, NotChecked=0, Total=18360 [2022-02-24 03:03:19,706 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 17 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 5403 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 5491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 5403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:03:19,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 333 Invalid, 5491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 5403 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-24 03:03:19,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-02-24 03:03:19,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2022-02-24 03:03:19,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.0232558139534884) internal successors, (88), 86 states have internal predecessors, (88), 3 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) [2022-02-24 03:03:19,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2022-02-24 03:03:19,719 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 88 [2022-02-24 03:03:19,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:03:19,720 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2022-02-24 03:03:19,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.2) internal successors, (84), 69 states have internal predecessors, (84), 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) [2022-02-24 03:03:19,720 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2022-02-24 03:03:19,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-24 03:03:19,720 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:03:19,721 INFO L514 BasicCegarLoop]: trace histogram [60, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:03:19,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-02-24 03:03:19,721 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:03:19,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:03:19,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1359606601, now seen corresponding path program 65 times [2022-02-24 03:03:19,721 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:03:19,721 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1155374436] [2022-02-24 03:03:19,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:03:19,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:03:19,997 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:03:20,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:03:20,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:03:20,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:03:20,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:03:21,878 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:03:21,879 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1155374436] [2022-02-24 03:03:21,879 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1155374436] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:03:21,879 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:03:21,879 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-02-24 03:03:21,879 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444039858] [2022-02-24 03:03:21,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:03:21,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-02-24 03:03:21,879 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:03:21,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-02-24 03:03:21,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=4820, Unknown=0, NotChecked=0, Total=4970 [2022-02-24 03:03:21,880 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand has 71 states, 71 states have (on average 1.1971830985915493) internal successors, (85), 70 states have internal predecessors, (85), 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) [2022-02-24 03:03:25,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:03:25,166 INFO L93 Difference]: Finished difference Result 98 states and 99 transitions. [2022-02-24 03:03:25,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-02-24 03:03:25,166 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.1971830985915493) internal successors, (85), 70 states have internal predecessors, (85), 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 89 [2022-02-24 03:03:25,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:03:25,167 INFO L225 Difference]: With dead ends: 98 [2022-02-24 03:03:25,167 INFO L226 Difference]: Without dead ends: 93 [2022-02-24 03:03:25,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 12 SyntacticMatches, 9 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3520 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=429, Invalid=18477, Unknown=0, NotChecked=0, Total=18906 [2022-02-24 03:03:25,169 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 5696 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 5783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 5696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:03:25,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 348 Invalid, 5783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 5696 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-24 03:03:25,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-02-24 03:03:25,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-02-24 03:03:25,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 88 states have internal predecessors, (90), 3 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) [2022-02-24 03:03:25,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2022-02-24 03:03:25,182 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 89 [2022-02-24 03:03:25,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:03:25,183 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2022-02-24 03:03:25,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.1971830985915493) internal successors, (85), 70 states have internal predecessors, (85), 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) [2022-02-24 03:03:25,183 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2022-02-24 03:03:25,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-02-24 03:03:25,188 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:03:25,188 INFO L514 BasicCegarLoop]: trace histogram [60, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:03:25,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-02-24 03:03:25,189 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:03:25,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:03:25,189 INFO L85 PathProgramCache]: Analyzing trace with hash -992067069, now seen corresponding path program 66 times [2022-02-24 03:03:25,189 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:03:25,189 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1926686960] [2022-02-24 03:03:25,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:03:25,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:03:25,503 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:03:25,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:03:25,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:03:25,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:03:25,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:03:27,545 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:03:27,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1926686960] [2022-02-24 03:03:27,545 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1926686960] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:03:27,545 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:03:27,545 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-02-24 03:03:27,545 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856749611] [2022-02-24 03:03:27,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:03:27,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-02-24 03:03:27,545 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:03:27,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-02-24 03:03:27,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=4960, Unknown=0, NotChecked=0, Total=5112 [2022-02-24 03:03:27,546 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 72 states, 72 states have (on average 1.2222222222222223) internal successors, (88), 71 states have internal predecessors, (88), 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) [2022-02-24 03:03:30,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:03:30,787 INFO L93 Difference]: Finished difference Result 102 states and 105 transitions. [2022-02-24 03:03:30,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-02-24 03:03:30,787 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.2222222222222223) internal successors, (88), 71 states have internal predecessors, (88), 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 92 [2022-02-24 03:03:30,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:03:30,788 INFO L225 Difference]: With dead ends: 102 [2022-02-24 03:03:30,788 INFO L226 Difference]: Without dead ends: 94 [2022-02-24 03:03:30,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 10 SyntacticMatches, 14 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3642 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=435, Invalid=19025, Unknown=0, NotChecked=0, Total=19460 [2022-02-24 03:03:30,789 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 5338 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 5426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 5338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:03:30,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 318 Invalid, 5426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 5338 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-24 03:03:30,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-02-24 03:03:30,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-02-24 03:03:30,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 89 states have (on average 1.0224719101123596) internal successors, (91), 89 states have internal predecessors, (91), 3 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) [2022-02-24 03:03:30,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2022-02-24 03:03:30,805 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 92 [2022-02-24 03:03:30,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:03:30,806 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2022-02-24 03:03:30,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.2222222222222223) internal successors, (88), 71 states have internal predecessors, (88), 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) [2022-02-24 03:03:30,806 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2022-02-24 03:03:30,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-24 03:03:30,806 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:03:30,806 INFO L514 BasicCegarLoop]: trace histogram [61, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:03:30,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-02-24 03:03:30,807 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:03:30,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:03:30,807 INFO L85 PathProgramCache]: Analyzing trace with hash -2132075014, now seen corresponding path program 67 times [2022-02-24 03:03:30,807 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:03:30,807 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544358032] [2022-02-24 03:03:30,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:03:30,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:03:31,188 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:03:31,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:03:31,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:03:31,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:03:31,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:03:33,299 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:03:33,299 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [544358032] [2022-02-24 03:03:33,299 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [544358032] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:03:33,299 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:03:33,299 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-02-24 03:03:33,299 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238118364] [2022-02-24 03:03:33,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:03:33,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-02-24 03:03:33,300 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:03:33,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-02-24 03:03:33,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=5102, Unknown=0, NotChecked=0, Total=5256 [2022-02-24 03:03:33,301 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand has 73 states, 73 states have (on average 1.2191780821917808) internal successors, (89), 72 states have internal predecessors, (89), 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) [2022-02-24 03:03:36,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:03:36,802 INFO L93 Difference]: Finished difference Result 103 states and 106 transitions. [2022-02-24 03:03:36,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-02-24 03:03:36,803 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.2191780821917808) internal successors, (89), 72 states have internal predecessors, (89), 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 93 [2022-02-24 03:03:36,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:03:36,803 INFO L225 Difference]: With dead ends: 103 [2022-02-24 03:03:36,803 INFO L226 Difference]: Without dead ends: 95 [2022-02-24 03:03:36,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 12 SyntacticMatches, 12 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3710 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=441, Invalid=19581, Unknown=0, NotChecked=0, Total=20022 [2022-02-24 03:03:36,805 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 5708 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 5797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 5708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:03:36,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 338 Invalid, 5797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 5708 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-24 03:03:36,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-02-24 03:03:36,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-02-24 03:03:36,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.0222222222222221) internal successors, (92), 90 states have internal predecessors, (92), 3 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) [2022-02-24 03:03:36,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2022-02-24 03:03:36,820 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 93 [2022-02-24 03:03:36,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:03:36,821 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2022-02-24 03:03:36,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.2191780821917808) internal successors, (89), 72 states have internal predecessors, (89), 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) [2022-02-24 03:03:36,821 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2022-02-24 03:03:36,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-02-24 03:03:36,821 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:03:36,821 INFO L514 BasicCegarLoop]: trace histogram [62, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:03:36,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-02-24 03:03:36,822 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:03:36,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:03:36,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1182384355, now seen corresponding path program 68 times [2022-02-24 03:03:36,822 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:03:36,822 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1920578904] [2022-02-24 03:03:36,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:03:36,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:03:37,166 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:03:37,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:03:37,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:03:37,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:03:37,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:03:39,306 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:03:39,306 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1920578904] [2022-02-24 03:03:39,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1920578904] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:03:39,306 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:03:39,306 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-02-24 03:03:39,306 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649621889] [2022-02-24 03:03:39,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:03:39,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-02-24 03:03:39,307 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:03:39,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-02-24 03:03:39,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=5246, Unknown=0, NotChecked=0, Total=5402 [2022-02-24 03:03:39,308 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand has 74 states, 74 states have (on average 1.2162162162162162) internal successors, (90), 73 states have internal predecessors, (90), 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) [2022-02-24 03:03:42,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:03:42,974 INFO L93 Difference]: Finished difference Result 104 states and 107 transitions. [2022-02-24 03:03:42,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-02-24 03:03:42,974 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.2162162162162162) internal successors, (90), 73 states have internal predecessors, (90), 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 94 [2022-02-24 03:03:42,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:03:42,975 INFO L225 Difference]: With dead ends: 104 [2022-02-24 03:03:42,975 INFO L226 Difference]: Without dead ends: 96 [2022-02-24 03:03:42,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 10 SyntacticMatches, 14 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3823 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=447, Invalid=20145, Unknown=0, NotChecked=0, Total=20592 [2022-02-24 03:03:42,976 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 6161 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 6251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 6161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-24 03:03:42,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 363 Invalid, 6251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 6161 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-24 03:03:42,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-02-24 03:03:42,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-02-24 03:03:42,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.021978021978022) internal successors, (93), 91 states have internal predecessors, (93), 3 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) [2022-02-24 03:03:42,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2022-02-24 03:03:42,987 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 94 [2022-02-24 03:03:42,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:03:42,987 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2022-02-24 03:03:42,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.2162162162162162) internal successors, (90), 73 states have internal predecessors, (90), 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) [2022-02-24 03:03:42,987 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2022-02-24 03:03:42,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-02-24 03:03:42,988 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:03:42,988 INFO L514 BasicCegarLoop]: trace histogram [63, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:03:42,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-02-24 03:03:42,988 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:03:42,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:03:42,989 INFO L85 PathProgramCache]: Analyzing trace with hash 851409690, now seen corresponding path program 69 times [2022-02-24 03:03:42,989 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:03:42,989 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [945940582] [2022-02-24 03:03:42,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:03:42,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:03:43,361 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:03:43,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:03:43,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:03:43,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:03:43,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:03:45,582 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:03:45,583 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [945940582] [2022-02-24 03:03:45,583 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [945940582] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:03:45,583 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:03:45,583 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-02-24 03:03:45,583 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748598124] [2022-02-24 03:03:45,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:03:45,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-02-24 03:03:45,583 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:03:45,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-02-24 03:03:45,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=5392, Unknown=0, NotChecked=0, Total=5550 [2022-02-24 03:03:45,584 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand has 75 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 74 states have internal predecessors, (91), 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) [2022-02-24 03:03:49,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:03:49,162 INFO L93 Difference]: Finished difference Result 105 states and 108 transitions. [2022-02-24 03:03:49,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-02-24 03:03:49,162 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 74 states have internal predecessors, (91), 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 95 [2022-02-24 03:03:49,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:03:49,163 INFO L225 Difference]: With dead ends: 105 [2022-02-24 03:03:49,163 INFO L226 Difference]: Without dead ends: 97 [2022-02-24 03:03:49,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 12 SyntacticMatches, 12 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3915 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=453, Invalid=20717, Unknown=0, NotChecked=0, Total=21170 [2022-02-24 03:03:49,164 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 5560 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 5651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 5560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:03:49,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 318 Invalid, 5651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 5560 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-24 03:03:49,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-02-24 03:03:49,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-02-24 03:03:49,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 92 states have internal predecessors, (94), 3 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) [2022-02-24 03:03:49,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2022-02-24 03:03:49,179 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 95 [2022-02-24 03:03:49,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:03:49,179 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2022-02-24 03:03:49,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 74 states have internal predecessors, (91), 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) [2022-02-24 03:03:49,179 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2022-02-24 03:03:49,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-02-24 03:03:49,179 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:03:49,180 INFO L514 BasicCegarLoop]: trace histogram [64, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:03:49,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-02-24 03:03:49,180 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:03:49,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:03:49,180 INFO L85 PathProgramCache]: Analyzing trace with hash -818870333, now seen corresponding path program 70 times [2022-02-24 03:03:49,180 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:03:49,180 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [560860254] [2022-02-24 03:03:49,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:03:49,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:03:49,535 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:03:49,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:03:49,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:03:49,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:03:49,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:03:51,854 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:03:51,854 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [560860254] [2022-02-24 03:03:51,854 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [560860254] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:03:51,854 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:03:51,854 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-02-24 03:03:51,854 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561048125] [2022-02-24 03:03:51,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:03:51,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-02-24 03:03:51,855 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:03:51,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-02-24 03:03:51,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=5540, Unknown=0, NotChecked=0, Total=5700 [2022-02-24 03:03:51,856 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 76 states, 76 states have (on average 1.2105263157894737) internal successors, (92), 75 states have internal predecessors, (92), 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) [2022-02-24 03:03:55,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:03:55,726 INFO L93 Difference]: Finished difference Result 106 states and 109 transitions. [2022-02-24 03:03:55,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-24 03:03:55,726 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.2105263157894737) internal successors, (92), 75 states have internal predecessors, (92), 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 96 [2022-02-24 03:03:55,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:03:55,727 INFO L225 Difference]: With dead ends: 106 [2022-02-24 03:03:55,727 INFO L226 Difference]: Without dead ends: 98 [2022-02-24 03:03:55,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 12 SyntacticMatches, 12 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3997 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=459, Invalid=21297, Unknown=0, NotChecked=0, Total=21756 [2022-02-24 03:03:55,728 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 6404 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 6496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 6404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:03:55,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 368 Invalid, 6496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 6404 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-24 03:03:55,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-02-24 03:03:55,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2022-02-24 03:03:55,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 93 states have (on average 1.021505376344086) internal successors, (95), 93 states have internal predecessors, (95), 3 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) [2022-02-24 03:03:55,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2022-02-24 03:03:55,744 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 96 [2022-02-24 03:03:55,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:03:55,744 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2022-02-24 03:03:55,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.2105263157894737) internal successors, (92), 75 states have internal predecessors, (92), 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) [2022-02-24 03:03:55,744 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2022-02-24 03:03:55,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-02-24 03:03:55,745 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:03:55,745 INFO L514 BasicCegarLoop]: trace histogram [65, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:03:55,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-02-24 03:03:55,745 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:03:55,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:03:55,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1057943494, now seen corresponding path program 71 times [2022-02-24 03:03:55,746 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:03:55,746 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1142963543] [2022-02-24 03:03:55,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:03:55,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:03:56,096 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:03:56,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:03:56,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:03:56,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:03:56,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:03:58,450 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:03:58,450 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1142963543] [2022-02-24 03:03:58,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1142963543] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:03:58,450 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:03:58,450 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-02-24 03:03:58,450 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203652028] [2022-02-24 03:03:58,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:03:58,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-02-24 03:03:58,450 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:03:58,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-02-24 03:03:58,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=5690, Unknown=0, NotChecked=0, Total=5852 [2022-02-24 03:03:58,451 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand has 77 states, 77 states have (on average 1.2077922077922079) internal successors, (93), 76 states have internal predecessors, (93), 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) [2022-02-24 03:04:02,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:04:02,348 INFO L93 Difference]: Finished difference Result 107 states and 110 transitions. [2022-02-24 03:04:02,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-02-24 03:04:02,348 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.2077922077922079) internal successors, (93), 76 states have internal predecessors, (93), 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 97 [2022-02-24 03:04:02,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:04:02,349 INFO L225 Difference]: With dead ends: 107 [2022-02-24 03:04:02,349 INFO L226 Difference]: Without dead ends: 99 [2022-02-24 03:04:02,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 12 SyntacticMatches, 12 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4091 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=465, Invalid=21885, Unknown=0, NotChecked=0, Total=22350 [2022-02-24 03:04:02,350 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 6332 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 6425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 6332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:04:02,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 358 Invalid, 6425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 6332 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-24 03:04:02,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-02-24 03:04:02,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-02-24 03:04:02,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.0212765957446808) internal successors, (96), 94 states have internal predecessors, (96), 3 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) [2022-02-24 03:04:02,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2022-02-24 03:04:02,361 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 97 [2022-02-24 03:04:02,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:04:02,361 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2022-02-24 03:04:02,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.2077922077922079) internal successors, (93), 76 states have internal predecessors, (93), 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) [2022-02-24 03:04:02,361 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2022-02-24 03:04:02,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-02-24 03:04:02,361 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:04:02,361 INFO L514 BasicCegarLoop]: trace histogram [66, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:04:02,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-02-24 03:04:02,362 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:04:02,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:04:02,362 INFO L85 PathProgramCache]: Analyzing trace with hash 120723107, now seen corresponding path program 72 times [2022-02-24 03:04:02,362 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:04:02,362 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [912675016] [2022-02-24 03:04:02,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:04:02,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:04:02,714 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:04:02,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:04:02,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:04:02,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:04:02,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:04:05,076 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:04:05,076 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [912675016] [2022-02-24 03:04:05,076 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [912675016] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:04:05,076 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:04:05,076 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-02-24 03:04:05,076 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861456939] [2022-02-24 03:04:05,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:04:05,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-02-24 03:04:05,077 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:04:05,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-02-24 03:04:05,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=5842, Unknown=0, NotChecked=0, Total=6006 [2022-02-24 03:04:05,077 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand has 78 states, 78 states have (on average 1.205128205128205) internal successors, (94), 77 states have internal predecessors, (94), 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) [2022-02-24 03:04:09,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:04:09,161 INFO L93 Difference]: Finished difference Result 108 states and 111 transitions. [2022-02-24 03:04:09,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-02-24 03:04:09,162 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.205128205128205) internal successors, (94), 77 states have internal predecessors, (94), 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 98 [2022-02-24 03:04:09,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:04:09,163 INFO L225 Difference]: With dead ends: 108 [2022-02-24 03:04:09,163 INFO L226 Difference]: Without dead ends: 100 [2022-02-24 03:04:09,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 12 SyntacticMatches, 12 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4175 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=471, Invalid=22481, Unknown=0, NotChecked=0, Total=22952 [2022-02-24 03:04:09,164 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 6809 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 6903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 6809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-24 03:04:09,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 383 Invalid, 6903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 6809 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-24 03:04:09,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-02-24 03:04:09,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-02-24 03:04:09,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.0210526315789474) internal successors, (97), 95 states have internal predecessors, (97), 3 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) [2022-02-24 03:04:09,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2022-02-24 03:04:09,176 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 98 [2022-02-24 03:04:09,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:04:09,176 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2022-02-24 03:04:09,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.205128205128205) internal successors, (94), 77 states have internal predecessors, (94), 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) [2022-02-24 03:04:09,177 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2022-02-24 03:04:09,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-02-24 03:04:09,177 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:04:09,177 INFO L514 BasicCegarLoop]: trace histogram [67, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:04:09,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-02-24 03:04:09,177 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:04:09,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:04:09,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1995317926, now seen corresponding path program 73 times [2022-02-24 03:04:09,177 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:04:09,178 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [855046637] [2022-02-24 03:04:09,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:04:09,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:04:09,538 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:04:09,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:04:09,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:04:09,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:04:09,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:04:11,916 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:04:11,916 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [855046637] [2022-02-24 03:04:11,916 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [855046637] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:04:11,916 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:04:11,916 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-02-24 03:04:11,916 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652191606] [2022-02-24 03:04:11,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:04:11,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-02-24 03:04:11,917 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:04:11,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-02-24 03:04:11,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=5996, Unknown=0, NotChecked=0, Total=6162 [2022-02-24 03:04:11,918 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand has 79 states, 79 states have (on average 1.2025316455696202) internal successors, (95), 78 states have internal predecessors, (95), 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) [2022-02-24 03:04:16,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:04:16,010 INFO L93 Difference]: Finished difference Result 109 states and 112 transitions. [2022-02-24 03:04:16,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-02-24 03:04:16,010 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.2025316455696202) internal successors, (95), 78 states have internal predecessors, (95), 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 99 [2022-02-24 03:04:16,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:04:16,010 INFO L225 Difference]: With dead ends: 109 [2022-02-24 03:04:16,010 INFO L226 Difference]: Without dead ends: 101 [2022-02-24 03:04:16,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 12 SyntacticMatches, 12 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4271 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=477, Invalid=23085, Unknown=0, NotChecked=0, Total=23562 [2022-02-24 03:04:16,012 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 6656 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 6751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 6656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-24 03:04:16,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 368 Invalid, 6751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 6656 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-24 03:04:16,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-02-24 03:04:16,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-02-24 03:04:16,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 96 states have internal predecessors, (98), 3 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) [2022-02-24 03:04:16,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2022-02-24 03:04:16,028 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 99 [2022-02-24 03:04:16,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:04:16,028 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2022-02-24 03:04:16,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.2025316455696202) internal successors, (95), 78 states have internal predecessors, (95), 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) [2022-02-24 03:04:16,028 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2022-02-24 03:04:16,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-02-24 03:04:16,029 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:04:16,029 INFO L514 BasicCegarLoop]: trace histogram [68, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:04:16,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-02-24 03:04:16,029 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:04:16,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:04:16,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1126886787, now seen corresponding path program 74 times [2022-02-24 03:04:16,029 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:04:16,029 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1050019198] [2022-02-24 03:04:16,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:04:16,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:04:16,378 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:04:16,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:04:16,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:04:16,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:04:16,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:04:18,854 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:04:18,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1050019198] [2022-02-24 03:04:18,855 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1050019198] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:04:18,855 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:04:18,855 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-02-24 03:04:18,855 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113562808] [2022-02-24 03:04:18,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:04:18,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-02-24 03:04:18,855 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:04:18,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-02-24 03:04:18,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=6152, Unknown=0, NotChecked=0, Total=6320 [2022-02-24 03:04:18,856 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 80 states, 80 states have (on average 1.2) internal successors, (96), 79 states have internal predecessors, (96), 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) [2022-02-24 03:04:23,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:04:23,028 INFO L93 Difference]: Finished difference Result 110 states and 113 transitions. [2022-02-24 03:04:23,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-02-24 03:04:23,028 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.2) internal successors, (96), 79 states have internal predecessors, (96), 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 100 [2022-02-24 03:04:23,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:04:23,029 INFO L225 Difference]: With dead ends: 110 [2022-02-24 03:04:23,029 INFO L226 Difference]: Without dead ends: 102 [2022-02-24 03:04:23,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 11 SyntacticMatches, 13 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4390 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=483, Invalid=23697, Unknown=0, NotChecked=0, Total=24180 [2022-02-24 03:04:23,030 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 6578 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 6674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 6578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-24 03:04:23,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 358 Invalid, 6674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 6578 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-24 03:04:23,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-02-24 03:04:23,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-02-24 03:04:23,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 97 states have (on average 1.0206185567010309) internal successors, (99), 97 states have internal predecessors, (99), 3 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) [2022-02-24 03:04:23,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2022-02-24 03:04:23,041 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 100 [2022-02-24 03:04:23,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:04:23,041 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2022-02-24 03:04:23,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.2) internal successors, (96), 79 states have internal predecessors, (96), 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) [2022-02-24 03:04:23,041 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2022-02-24 03:04:23,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-02-24 03:04:23,041 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:04:23,042 INFO L514 BasicCegarLoop]: trace histogram [69, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:04:23,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-02-24 03:04:23,042 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:04:23,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:04:23,042 INFO L85 PathProgramCache]: Analyzing trace with hash -869014918, now seen corresponding path program 75 times [2022-02-24 03:04:23,042 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:04:23,042 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [777261001] [2022-02-24 03:04:23,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:04:23,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:04:23,386 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:04:23,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:04:23,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:04:23,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:04:23,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:04:25,968 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:04:25,968 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [777261001] [2022-02-24 03:04:25,968 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [777261001] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:04:25,968 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:04:25,968 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-02-24 03:04:25,968 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639782630] [2022-02-24 03:04:25,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:04:25,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-02-24 03:04:25,969 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:04:25,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-02-24 03:04:25,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=6310, Unknown=0, NotChecked=0, Total=6480 [2022-02-24 03:04:25,969 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand has 81 states, 81 states have (on average 1.1975308641975309) internal successors, (97), 80 states have internal predecessors, (97), 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) [2022-02-24 03:04:30,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:04:30,414 INFO L93 Difference]: Finished difference Result 113 states and 117 transitions. [2022-02-24 03:04:30,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-02-24 03:04:30,414 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.1975308641975309) internal successors, (97), 80 states have internal predecessors, (97), 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 101 [2022-02-24 03:04:30,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:04:30,415 INFO L225 Difference]: With dead ends: 113 [2022-02-24 03:04:30,415 INFO L226 Difference]: Without dead ends: 105 [2022-02-24 03:04:30,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 10 SyntacticMatches, 14 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4488 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=489, Invalid=24317, Unknown=0, NotChecked=0, Total=24806 [2022-02-24 03:04:30,416 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 18 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 7470 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 7570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 7470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:04:30,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 398 Invalid, 7570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 7470 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-02-24 03:04:30,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-02-24 03:04:30,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2022-02-24 03:04:30,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 99 states have (on average 1.02020202020202) internal successors, (101), 99 states have internal predecessors, (101), 3 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) [2022-02-24 03:04:30,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2022-02-24 03:04:30,428 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 101 [2022-02-24 03:04:30,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:04:30,428 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2022-02-24 03:04:30,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.1975308641975309) internal successors, (97), 80 states have internal predecessors, (97), 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) [2022-02-24 03:04:30,428 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2022-02-24 03:04:30,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 03:04:30,428 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:04:30,428 INFO L514 BasicCegarLoop]: trace histogram [70, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:04:30,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-02-24 03:04:30,429 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:04:30,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:04:30,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1682541667, now seen corresponding path program 76 times [2022-02-24 03:04:30,429 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:04:30,429 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1392359096] [2022-02-24 03:04:30,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:04:30,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:04:30,676 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:04:30,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:04:30,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:04:30,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:04:30,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:04:33,337 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:04:33,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1392359096] [2022-02-24 03:04:33,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1392359096] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:04:33,337 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:04:33,337 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-02-24 03:04:33,337 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139142186] [2022-02-24 03:04:33,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:04:33,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-02-24 03:04:33,337 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:04:33,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-02-24 03:04:33,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=6470, Unknown=0, NotChecked=0, Total=6642 [2022-02-24 03:04:33,338 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand has 82 states, 82 states have (on average 1.1951219512195121) internal successors, (98), 81 states have internal predecessors, (98), 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) [2022-02-24 03:04:37,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:04:37,776 INFO L93 Difference]: Finished difference Result 111 states and 112 transitions. [2022-02-24 03:04:37,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-02-24 03:04:37,776 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.1951219512195121) internal successors, (98), 81 states have internal predecessors, (98), 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 102 [2022-02-24 03:04:37,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:04:37,777 INFO L225 Difference]: With dead ends: 111 [2022-02-24 03:04:37,777 INFO L226 Difference]: Without dead ends: 106 [2022-02-24 03:04:37,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 9 SyntacticMatches, 14 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4609 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=495, Invalid=24945, Unknown=0, NotChecked=0, Total=25440 [2022-02-24 03:04:37,778 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 17 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 7135 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 7234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 7135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:04:37,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 373 Invalid, 7234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 7135 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-02-24 03:04:37,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-02-24 03:04:37,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2022-02-24 03:04:37,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 101 states have internal predecessors, (103), 3 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) [2022-02-24 03:04:37,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2022-02-24 03:04:37,789 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 102 [2022-02-24 03:04:37,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:04:37,789 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2022-02-24 03:04:37,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.1951219512195121) internal successors, (98), 81 states have internal predecessors, (98), 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) [2022-02-24 03:04:37,790 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2022-02-24 03:04:37,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-02-24 03:04:37,790 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:04:37,790 INFO L514 BasicCegarLoop]: trace histogram [70, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:04:37,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-02-24 03:04:37,790 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:04:37,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:04:37,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1160258903, now seen corresponding path program 77 times [2022-02-24 03:04:37,790 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:04:37,791 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81669829] [2022-02-24 03:04:37,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:04:37,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:04:38,106 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:04:38,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:04:38,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:04:38,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:04:38,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:04:40,826 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:04:40,826 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81669829] [2022-02-24 03:04:40,826 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [81669829] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:04:40,826 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:04:40,827 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-02-24 03:04:40,827 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37029149] [2022-02-24 03:04:40,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:04:40,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-02-24 03:04:40,827 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:04:40,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-02-24 03:04:40,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=6632, Unknown=0, NotChecked=0, Total=6806 [2022-02-24 03:04:40,828 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand has 83 states, 83 states have (on average 1.216867469879518) internal successors, (101), 82 states have internal predecessors, (101), 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) [2022-02-24 03:04:45,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:04:45,289 INFO L93 Difference]: Finished difference Result 115 states and 118 transitions. [2022-02-24 03:04:45,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-02-24 03:04:45,290 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.216867469879518) internal successors, (101), 82 states have internal predecessors, (101), 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 105 [2022-02-24 03:04:45,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:04:45,290 INFO L225 Difference]: With dead ends: 115 [2022-02-24 03:04:45,290 INFO L226 Difference]: Without dead ends: 107 [2022-02-24 03:04:45,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 13 SyntacticMatches, 13 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4698 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=501, Invalid=25581, Unknown=0, NotChecked=0, Total=26082 [2022-02-24 03:04:45,292 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 17 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 7134 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 7234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 7134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:04:45,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 368 Invalid, 7234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 7134 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-02-24 03:04:45,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-02-24 03:04:45,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2022-02-24 03:04:45,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.0196078431372548) internal successors, (104), 102 states have internal predecessors, (104), 3 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) [2022-02-24 03:04:45,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2022-02-24 03:04:45,303 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 105 [2022-02-24 03:04:45,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:04:45,303 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2022-02-24 03:04:45,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.216867469879518) internal successors, (101), 82 states have internal predecessors, (101), 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) [2022-02-24 03:04:45,303 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2022-02-24 03:04:45,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-02-24 03:04:45,303 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:04:45,303 INFO L514 BasicCegarLoop]: trace histogram [71, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:04:45,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-02-24 03:04:45,304 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:04:45,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:04:45,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1243912724, now seen corresponding path program 78 times [2022-02-24 03:04:45,304 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:04:45,304 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [113171112] [2022-02-24 03:04:45,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:04:45,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:04:45,634 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:04:45,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:04:45,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:04:45,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:04:45,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:04:48,380 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:04:48,380 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [113171112] [2022-02-24 03:04:48,381 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [113171112] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:04:48,381 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:04:48,381 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-02-24 03:04:48,381 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222092067] [2022-02-24 03:04:48,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:04:48,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-02-24 03:04:48,381 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:04:48,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-02-24 03:04:48,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=6796, Unknown=0, NotChecked=0, Total=6972 [2022-02-24 03:04:48,382 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand has 84 states, 84 states have (on average 1.2142857142857142) internal successors, (102), 83 states have internal predecessors, (102), 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) [2022-02-24 03:04:53,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:04:53,012 INFO L93 Difference]: Finished difference Result 116 states and 119 transitions. [2022-02-24 03:04:53,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-02-24 03:04:53,012 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.2142857142857142) internal successors, (102), 83 states have internal predecessors, (102), 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 106 [2022-02-24 03:04:53,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:04:53,013 INFO L225 Difference]: With dead ends: 116 [2022-02-24 03:04:53,013 INFO L226 Difference]: Without dead ends: 108 [2022-02-24 03:04:53,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 10 SyntacticMatches, 16 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4810 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=507, Invalid=26225, Unknown=0, NotChecked=0, Total=26732 [2022-02-24 03:04:53,015 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 17 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 7479 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 7580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 7479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:04:53,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 383 Invalid, 7580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 7479 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-02-24 03:04:53,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-02-24 03:04:53,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2022-02-24 03:04:53,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 103 states have (on average 1.0194174757281553) internal successors, (105), 103 states have internal predecessors, (105), 3 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) [2022-02-24 03:04:53,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2022-02-24 03:04:53,026 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 106 [2022-02-24 03:04:53,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:04:53,026 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2022-02-24 03:04:53,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.2142857142857142) internal successors, (102), 83 states have internal predecessors, (102), 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) [2022-02-24 03:04:53,026 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2022-02-24 03:04:53,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-02-24 03:04:53,027 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:04:53,027 INFO L514 BasicCegarLoop]: trace histogram [72, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:04:53,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-02-24 03:04:53,027 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:04:53,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:04:53,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1536178167, now seen corresponding path program 79 times [2022-02-24 03:04:53,028 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:04:53,028 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [553190259] [2022-02-24 03:04:53,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:04:53,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:04:53,382 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:04:53,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:04:53,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:04:53,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:04:53,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:04:56,076 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:04:56,076 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [553190259] [2022-02-24 03:04:56,076 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [553190259] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:04:56,076 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:04:56,076 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-02-24 03:04:56,076 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392781081] [2022-02-24 03:04:56,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:04:56,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-02-24 03:04:56,077 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:04:56,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-02-24 03:04:56,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=6962, Unknown=0, NotChecked=0, Total=7140 [2022-02-24 03:04:56,077 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand has 85 states, 85 states have (on average 1.2117647058823529) internal successors, (103), 84 states have internal predecessors, (103), 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) [2022-02-24 03:05:00,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:05:00,822 INFO L93 Difference]: Finished difference Result 117 states and 120 transitions. [2022-02-24 03:05:00,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-02-24 03:05:00,823 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.2117647058823529) internal successors, (103), 84 states have internal predecessors, (103), 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 107 [2022-02-24 03:05:00,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:05:00,823 INFO L225 Difference]: With dead ends: 117 [2022-02-24 03:05:00,823 INFO L226 Difference]: Without dead ends: 109 [2022-02-24 03:05:00,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 16 SyntacticMatches, 10 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4846 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=513, Invalid=26877, Unknown=0, NotChecked=0, Total=27390 [2022-02-24 03:05:00,825 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 17 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 7742 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 7844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 7742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:05:00,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 393 Invalid, 7844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 7742 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-02-24 03:05:00,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-02-24 03:05:00,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2022-02-24 03:05:00,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 104 states have internal predecessors, (106), 3 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) [2022-02-24 03:05:00,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2022-02-24 03:05:00,836 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 107 [2022-02-24 03:05:00,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:05:00,836 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2022-02-24 03:05:00,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.2117647058823529) internal successors, (103), 84 states have internal predecessors, (103), 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) [2022-02-24 03:05:00,836 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2022-02-24 03:05:00,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-02-24 03:05:00,837 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:05:00,837 INFO L514 BasicCegarLoop]: trace histogram [73, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:05:00,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-02-24 03:05:00,837 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:05:00,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:05:00,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1819649868, now seen corresponding path program 80 times [2022-02-24 03:05:00,837 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:05:00,837 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1492814086] [2022-02-24 03:05:00,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:05:00,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:05:01,196 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:05:01,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:05:01,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:05:01,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:05:01,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:05:04,071 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:05:04,071 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1492814086] [2022-02-24 03:05:04,072 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1492814086] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:05:04,072 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:05:04,072 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-02-24 03:05:04,072 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632396839] [2022-02-24 03:05:04,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:05:04,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-02-24 03:05:04,072 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:05:04,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-02-24 03:05:04,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=7130, Unknown=0, NotChecked=0, Total=7310 [2022-02-24 03:05:04,073 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 86 states, 86 states have (on average 1.2093023255813953) internal successors, (104), 85 states have internal predecessors, (104), 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) [2022-02-24 03:05:08,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:05:08,904 INFO L93 Difference]: Finished difference Result 118 states and 121 transitions. [2022-02-24 03:05:08,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-02-24 03:05:08,905 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.2093023255813953) internal successors, (104), 85 states have internal predecessors, (104), 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 108 [2022-02-24 03:05:08,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:05:08,905 INFO L225 Difference]: With dead ends: 118 [2022-02-24 03:05:08,905 INFO L226 Difference]: Without dead ends: 110 [2022-02-24 03:05:08,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 12 SyntacticMatches, 14 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4993 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=519, Invalid=27537, Unknown=0, NotChecked=0, Total=28056 [2022-02-24 03:05:08,907 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 17 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 7742 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 7845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 7742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:05:08,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 388 Invalid, 7845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 7742 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-02-24 03:05:08,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-02-24 03:05:08,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-02-24 03:05:08,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 105 states have (on average 1.019047619047619) internal successors, (107), 105 states have internal predecessors, (107), 3 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) [2022-02-24 03:05:08,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2022-02-24 03:05:08,919 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 108 [2022-02-24 03:05:08,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:05:08,919 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2022-02-24 03:05:08,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.2093023255813953) internal successors, (104), 85 states have internal predecessors, (104), 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) [2022-02-24 03:05:08,919 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2022-02-24 03:05:08,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-02-24 03:05:08,919 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:05:08,920 INFO L514 BasicCegarLoop]: trace histogram [74, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:05:08,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-02-24 03:05:08,920 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:05:08,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:05:08,920 INFO L85 PathProgramCache]: Analyzing trace with hash -2017338007, now seen corresponding path program 81 times [2022-02-24 03:05:08,920 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:05:08,920 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [902088390] [2022-02-24 03:05:08,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:05:08,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:05:09,281 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:05:09,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:05:09,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:05:09,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:05:09,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:05:12,266 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:05:12,266 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [902088390] [2022-02-24 03:05:12,266 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [902088390] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:05:12,266 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:05:12,266 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-02-24 03:05:12,266 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438070370] [2022-02-24 03:05:12,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:05:12,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-02-24 03:05:12,267 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:05:12,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-02-24 03:05:12,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=7300, Unknown=0, NotChecked=0, Total=7482 [2022-02-24 03:05:12,268 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand has 87 states, 87 states have (on average 1.206896551724138) internal successors, (105), 86 states have internal predecessors, (105), 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) [2022-02-24 03:05:17,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:05:17,188 INFO L93 Difference]: Finished difference Result 119 states and 122 transitions. [2022-02-24 03:05:17,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-02-24 03:05:17,188 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.206896551724138) internal successors, (105), 86 states have internal predecessors, (105), 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 109 [2022-02-24 03:05:17,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:05:17,189 INFO L225 Difference]: With dead ends: 119 [2022-02-24 03:05:17,189 INFO L226 Difference]: Without dead ends: 111 [2022-02-24 03:05:17,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 12 SyntacticMatches, 14 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5097 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=525, Invalid=28205, Unknown=0, NotChecked=0, Total=28730 [2022-02-24 03:05:17,190 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 17 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 7920 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 8024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 7920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:05:17,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 393 Invalid, 8024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 7920 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-02-24 03:05:17,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-02-24 03:05:17,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-02-24 03:05:17,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.0188679245283019) internal successors, (108), 106 states have internal predecessors, (108), 3 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) [2022-02-24 03:05:17,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2022-02-24 03:05:17,202 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 109 [2022-02-24 03:05:17,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:05:17,203 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2022-02-24 03:05:17,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.206896551724138) internal successors, (105), 86 states have internal predecessors, (105), 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) [2022-02-24 03:05:17,203 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2022-02-24 03:05:17,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-02-24 03:05:17,203 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:05:17,203 INFO L514 BasicCegarLoop]: trace histogram [75, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:05:17,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-02-24 03:05:17,203 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:05:17,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:05:17,204 INFO L85 PathProgramCache]: Analyzing trace with hash 444264276, now seen corresponding path program 82 times [2022-02-24 03:05:17,204 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:05:17,204 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1937999605] [2022-02-24 03:05:17,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:05:17,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:05:17,578 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:05:17,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:05:17,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:05:17,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:05:17,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:05:20,571 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:05:20,571 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1937999605] [2022-02-24 03:05:20,571 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1937999605] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:05:20,571 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:05:20,571 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-02-24 03:05:20,571 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672794870] [2022-02-24 03:05:20,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:05:20,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-02-24 03:05:20,572 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:05:20,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-02-24 03:05:20,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=7472, Unknown=0, NotChecked=0, Total=7656 [2022-02-24 03:05:20,572 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand has 88 states, 88 states have (on average 1.2045454545454546) internal successors, (106), 87 states have internal predecessors, (106), 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) [2022-02-24 03:05:25,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:05:25,714 INFO L93 Difference]: Finished difference Result 120 states and 123 transitions. [2022-02-24 03:05:25,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-02-24 03:05:25,714 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 1.2045454545454546) internal successors, (106), 87 states have internal predecessors, (106), 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 110 [2022-02-24 03:05:25,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:05:25,714 INFO L225 Difference]: With dead ends: 120 [2022-02-24 03:05:25,715 INFO L226 Difference]: Without dead ends: 112 [2022-02-24 03:05:25,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 12 SyntacticMatches, 14 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5213 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=531, Invalid=28881, Unknown=0, NotChecked=0, Total=29412 [2022-02-24 03:05:25,716 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 17 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 8464 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 8569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 8464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:05:25,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 418 Invalid, 8569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 8464 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-02-24 03:05:25,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-02-24 03:05:25,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2022-02-24 03:05:25,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 107 states have (on average 1.0186915887850467) internal successors, (109), 107 states have internal predecessors, (109), 3 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) [2022-02-24 03:05:25,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2022-02-24 03:05:25,728 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 110 [2022-02-24 03:05:25,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:05:25,728 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2022-02-24 03:05:25,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 1.2045454545454546) internal successors, (106), 87 states have internal predecessors, (106), 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) [2022-02-24 03:05:25,728 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2022-02-24 03:05:25,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-02-24 03:05:25,729 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:05:25,729 INFO L514 BasicCegarLoop]: trace histogram [76, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:05:25,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-02-24 03:05:25,729 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:05:25,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:05:25,730 INFO L85 PathProgramCache]: Analyzing trace with hash -555476279, now seen corresponding path program 83 times [2022-02-24 03:05:25,730 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:05:25,730 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1364895498] [2022-02-24 03:05:25,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:05:25,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:05:26,098 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:05:26,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:05:26,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:05:26,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:05:26,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:05:29,115 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:05:29,115 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1364895498] [2022-02-24 03:05:29,115 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1364895498] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:05:29,115 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:05:29,116 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-02-24 03:05:29,116 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357125610] [2022-02-24 03:05:29,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:05:29,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-02-24 03:05:29,116 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:05:29,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-02-24 03:05:29,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=7646, Unknown=0, NotChecked=0, Total=7832 [2022-02-24 03:05:29,117 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand has 89 states, 89 states have (on average 1.202247191011236) internal successors, (107), 88 states have internal predecessors, (107), 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) [2022-02-24 03:05:34,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:05:34,280 INFO L93 Difference]: Finished difference Result 121 states and 124 transitions. [2022-02-24 03:05:34,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-02-24 03:05:34,281 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.202247191011236) internal successors, (107), 88 states have internal predecessors, (107), 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 111 [2022-02-24 03:05:34,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:05:34,281 INFO L225 Difference]: With dead ends: 121 [2022-02-24 03:05:34,281 INFO L226 Difference]: Without dead ends: 113 [2022-02-24 03:05:34,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 14 SyntacticMatches, 12 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5308 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=537, Invalid=29565, Unknown=0, NotChecked=0, Total=30102 [2022-02-24 03:05:34,283 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 17 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 8282 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 8388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 8282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:05:34,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 403 Invalid, 8388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 8282 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-02-24 03:05:34,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-02-24 03:05:34,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2022-02-24 03:05:34,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.0185185185185186) internal successors, (110), 108 states have internal predecessors, (110), 3 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) [2022-02-24 03:05:34,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2022-02-24 03:05:34,310 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 111 [2022-02-24 03:05:34,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:05:34,311 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2022-02-24 03:05:34,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.202247191011236) internal successors, (107), 88 states have internal predecessors, (107), 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) [2022-02-24 03:05:34,312 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2022-02-24 03:05:34,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-02-24 03:05:34,312 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:05:34,313 INFO L514 BasicCegarLoop]: trace histogram [77, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:05:34,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-02-24 03:05:34,313 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:05:34,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:05:34,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1482662412, now seen corresponding path program 84 times [2022-02-24 03:05:34,313 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:05:34,314 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [918350014] [2022-02-24 03:05:34,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:05:34,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:05:34,709 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:05:34,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:05:34,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:05:34,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:05:34,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:05:37,839 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:05:37,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [918350014] [2022-02-24 03:05:37,840 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [918350014] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:05:37,840 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:05:37,840 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-02-24 03:05:37,840 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124223196] [2022-02-24 03:05:37,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:05:37,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-02-24 03:05:37,840 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:05:37,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-02-24 03:05:37,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=7822, Unknown=0, NotChecked=0, Total=8010 [2022-02-24 03:05:37,841 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand has 90 states, 90 states have (on average 1.2) internal successors, (108), 89 states have internal predecessors, (108), 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) [2022-02-24 03:05:43,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:05:43,277 INFO L93 Difference]: Finished difference Result 122 states and 125 transitions. [2022-02-24 03:05:43,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-02-24 03:05:43,277 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.2) internal successors, (108), 89 states have internal predecessors, (108), 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 112 [2022-02-24 03:05:43,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:05:43,278 INFO L225 Difference]: With dead ends: 122 [2022-02-24 03:05:43,278 INFO L226 Difference]: Without dead ends: 114 [2022-02-24 03:05:43,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 11 SyntacticMatches, 15 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5426 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=543, Invalid=30257, Unknown=0, NotChecked=0, Total=30800 [2022-02-24 03:05:43,280 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 17 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 9024 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 9131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 9024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:05:43,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 438 Invalid, 9131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 9024 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-02-24 03:05:43,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-02-24 03:05:43,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2022-02-24 03:05:43,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 109 states have (on average 1.018348623853211) internal successors, (111), 109 states have internal predecessors, (111), 3 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) [2022-02-24 03:05:43,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2022-02-24 03:05:43,306 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 112 [2022-02-24 03:05:43,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:05:43,306 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2022-02-24 03:05:43,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.2) internal successors, (108), 89 states have internal predecessors, (108), 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) [2022-02-24 03:05:43,307 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2022-02-24 03:05:43,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-02-24 03:05:43,307 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:05:43,307 INFO L514 BasicCegarLoop]: trace histogram [78, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:05:43,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-02-24 03:05:43,308 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:05:43,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:05:43,308 INFO L85 PathProgramCache]: Analyzing trace with hash -160661463, now seen corresponding path program 85 times [2022-02-24 03:05:43,308 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:05:43,308 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [56085770] [2022-02-24 03:05:43,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:05:43,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:05:43,715 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:05:43,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:05:43,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:05:43,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:05:43,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:05:46,928 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:05:46,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [56085770] [2022-02-24 03:05:46,928 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [56085770] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:05:46,928 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:05:46,928 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-02-24 03:05:46,928 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506221145] [2022-02-24 03:05:46,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:05:46,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-02-24 03:05:46,928 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:05:46,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-02-24 03:05:46,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=8000, Unknown=0, NotChecked=0, Total=8190 [2022-02-24 03:05:46,929 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand has 91 states, 91 states have (on average 1.1978021978021978) internal successors, (109), 90 states have internal predecessors, (109), 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) [2022-02-24 03:05:52,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:05:52,275 INFO L93 Difference]: Finished difference Result 123 states and 126 transitions. [2022-02-24 03:05:52,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-02-24 03:05:52,275 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.1978021978021978) internal successors, (109), 90 states have internal predecessors, (109), 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 113 [2022-02-24 03:05:52,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:05:52,276 INFO L225 Difference]: With dead ends: 123 [2022-02-24 03:05:52,276 INFO L226 Difference]: Without dead ends: 115 [2022-02-24 03:05:52,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 11 SyntacticMatches, 15 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5534 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=549, Invalid=30957, Unknown=0, NotChecked=0, Total=31506 [2022-02-24 03:05:52,278 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 17 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 8370 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 8478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 8370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:05:52,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 398 Invalid, 8478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 8370 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-02-24 03:05:52,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-02-24 03:05:52,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2022-02-24 03:05:52,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.018181818181818) internal successors, (112), 110 states have internal predecessors, (112), 3 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) [2022-02-24 03:05:52,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2022-02-24 03:05:52,303 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 113 [2022-02-24 03:05:52,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:05:52,303 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2022-02-24 03:05:52,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.1978021978021978) internal successors, (109), 90 states have internal predecessors, (109), 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) [2022-02-24 03:05:52,304 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2022-02-24 03:05:52,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-02-24 03:05:52,304 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:05:52,304 INFO L514 BasicCegarLoop]: trace histogram [79, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:05:52,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-02-24 03:05:52,304 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:05:52,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:05:52,305 INFO L85 PathProgramCache]: Analyzing trace with hash -2128305004, now seen corresponding path program 86 times [2022-02-24 03:05:52,305 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:05:52,305 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [954361078] [2022-02-24 03:05:52,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:05:52,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:05:52,674 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:05:52,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:05:52,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:05:52,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:05:52,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:05:55,920 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:05:55,921 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [954361078] [2022-02-24 03:05:55,921 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [954361078] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:05:55,921 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:05:55,921 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-02-24 03:05:55,921 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883497977] [2022-02-24 03:05:55,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:05:55,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-02-24 03:05:55,921 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:05:55,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-02-24 03:05:55,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=8180, Unknown=0, NotChecked=0, Total=8372 [2022-02-24 03:05:55,922 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand has 92 states, 92 states have (on average 1.1956521739130435) internal successors, (110), 91 states have internal predecessors, (110), 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) [2022-02-24 03:06:01,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:06:01,700 INFO L93 Difference]: Finished difference Result 126 states and 130 transitions. [2022-02-24 03:06:01,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-02-24 03:06:01,700 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.1956521739130435) internal successors, (110), 91 states have internal predecessors, (110), 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 114 [2022-02-24 03:06:01,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:06:01,701 INFO L225 Difference]: With dead ends: 126 [2022-02-24 03:06:01,701 INFO L226 Difference]: Without dead ends: 118 [2022-02-24 03:06:01,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 13 SyntacticMatches, 13 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5632 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=555, Invalid=31665, Unknown=0, NotChecked=0, Total=32220 [2022-02-24 03:06:01,702 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 19 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 9778 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 9890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 9778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:06:01,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 458 Invalid, 9890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 9778 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-02-24 03:06:01,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-02-24 03:06:01,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2022-02-24 03:06:01,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.0178571428571428) internal successors, (114), 112 states have internal predecessors, (114), 3 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) [2022-02-24 03:06:01,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2022-02-24 03:06:01,718 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 114 [2022-02-24 03:06:01,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:06:01,719 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2022-02-24 03:06:01,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 1.1956521739130435) internal successors, (110), 91 states have internal predecessors, (110), 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) [2022-02-24 03:06:01,719 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2022-02-24 03:06:01,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-02-24 03:06:01,719 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:06:01,719 INFO L514 BasicCegarLoop]: trace histogram [80, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:06:01,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-02-24 03:06:01,720 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:06:01,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:06:01,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1299254665, now seen corresponding path program 87 times [2022-02-24 03:06:01,720 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:06:01,720 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [272289119] [2022-02-24 03:06:01,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:06:01,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:06:01,994 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:06:01,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:06:02,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:06:02,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:06:02,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:06:05,384 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:06:05,384 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [272289119] [2022-02-24 03:06:05,384 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [272289119] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:06:05,384 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:06:05,384 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-02-24 03:06:05,384 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751942691] [2022-02-24 03:06:05,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:06:05,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-02-24 03:06:05,385 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:06:05,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-02-24 03:06:05,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=8362, Unknown=0, NotChecked=0, Total=8556 [2022-02-24 03:06:05,385 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 93 states, 93 states have (on average 1.1935483870967742) internal successors, (111), 92 states have internal predecessors, (111), 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) [2022-02-24 03:06:11,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:06:11,170 INFO L93 Difference]: Finished difference Result 124 states and 125 transitions. [2022-02-24 03:06:11,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-02-24 03:06:11,170 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.1935483870967742) internal successors, (111), 92 states have internal predecessors, (111), 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 115 [2022-02-24 03:06:11,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:06:11,171 INFO L225 Difference]: With dead ends: 124 [2022-02-24 03:06:11,171 INFO L226 Difference]: Without dead ends: 119 [2022-02-24 03:06:11,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 10 SyntacticMatches, 15 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5775 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=561, Invalid=32381, Unknown=0, NotChecked=0, Total=32942 [2022-02-24 03:06:11,172 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 18 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 9586 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 9697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 9586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-02-24 03:06:11,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 443 Invalid, 9697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 9586 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-02-24 03:06:11,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-02-24 03:06:11,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2022-02-24 03:06:11,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.0175438596491229) internal successors, (116), 114 states have internal predecessors, (116), 3 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) [2022-02-24 03:06:11,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2022-02-24 03:06:11,187 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 115 [2022-02-24 03:06:11,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:06:11,187 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2022-02-24 03:06:11,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.1935483870967742) internal successors, (111), 92 states have internal predecessors, (111), 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) [2022-02-24 03:06:11,187 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2022-02-24 03:06:11,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-02-24 03:06:11,188 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:06:11,188 INFO L514 BasicCegarLoop]: trace histogram [80, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:06:11,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-02-24 03:06:11,188 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:06:11,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:06:11,189 INFO L85 PathProgramCache]: Analyzing trace with hash 654704579, now seen corresponding path program 88 times [2022-02-24 03:06:11,189 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:06:11,189 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2032493092] [2022-02-24 03:06:11,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:06:11,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:06:11,518 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:06:11,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:06:11,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:06:11,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:06:11,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:06:14,946 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:06:14,946 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2032493092] [2022-02-24 03:06:14,946 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2032493092] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:06:14,946 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:06:14,946 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-02-24 03:06:14,946 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021381186] [2022-02-24 03:06:14,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:06:14,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-02-24 03:06:14,947 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:06:14,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-02-24 03:06:14,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=8546, Unknown=0, NotChecked=0, Total=8742 [2022-02-24 03:06:14,948 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand has 94 states, 94 states have (on average 1.2127659574468086) internal successors, (114), 93 states have internal predecessors, (114), 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) [2022-02-24 03:06:20,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:06:20,739 INFO L93 Difference]: Finished difference Result 128 states and 131 transitions. [2022-02-24 03:06:20,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-02-24 03:06:20,739 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.2127659574468086) internal successors, (114), 93 states have internal predecessors, (114), 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 118 [2022-02-24 03:06:20,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:06:20,740 INFO L225 Difference]: With dead ends: 128 [2022-02-24 03:06:20,740 INFO L226 Difference]: Without dead ends: 120 [2022-02-24 03:06:20,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 12 SyntacticMatches, 16 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5875 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=567, Invalid=33105, Unknown=0, NotChecked=0, Total=33672 [2022-02-24 03:06:20,743 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 18 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 9289 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 9401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 9289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-02-24 03:06:20,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 423 Invalid, 9401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 9289 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-02-24 03:06:20,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-02-24 03:06:20,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2022-02-24 03:06:20,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 115 states have (on average 1.017391304347826) internal successors, (117), 115 states have internal predecessors, (117), 3 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) [2022-02-24 03:06:20,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2022-02-24 03:06:20,758 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 118 [2022-02-24 03:06:20,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:06:20,758 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2022-02-24 03:06:20,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 1.2127659574468086) internal successors, (114), 93 states have internal predecessors, (114), 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) [2022-02-24 03:06:20,758 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2022-02-24 03:06:20,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-02-24 03:06:20,758 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:06:20,758 INFO L514 BasicCegarLoop]: trace histogram [81, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:06:20,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-02-24 03:06:20,759 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:06:20,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:06:20,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1673205818, now seen corresponding path program 89 times [2022-02-24 03:06:20,759 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:06:20,759 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288727895] [2022-02-24 03:06:20,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:06:20,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:06:21,116 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:06:21,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:06:21,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:06:21,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:06:21,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:06:24,643 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:06:24,644 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288727895] [2022-02-24 03:06:24,644 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1288727895] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:06:24,644 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:06:24,644 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-02-24 03:06:24,644 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960513255] [2022-02-24 03:06:24,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:06:24,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-02-24 03:06:24,644 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:06:24,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-02-24 03:06:24,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=8732, Unknown=0, NotChecked=0, Total=8930 [2022-02-24 03:06:24,645 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand has 95 states, 95 states have (on average 1.2105263157894737) internal successors, (115), 94 states have internal predecessors, (115), 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) [2022-02-24 03:06:30,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:06:30,542 INFO L93 Difference]: Finished difference Result 129 states and 132 transitions. [2022-02-24 03:06:30,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-02-24 03:06:30,543 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 1.2105263157894737) internal successors, (115), 94 states have internal predecessors, (115), 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 119 [2022-02-24 03:06:30,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:06:30,543 INFO L225 Difference]: With dead ends: 129 [2022-02-24 03:06:30,543 INFO L226 Difference]: Without dead ends: 121 [2022-02-24 03:06:30,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 11 SyntacticMatches, 17 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5998 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=573, Invalid=33837, Unknown=0, NotChecked=0, Total=34410 [2022-02-24 03:06:30,545 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 18 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 9384 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 9497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 9384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-02-24 03:06:30,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 423 Invalid, 9497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 9384 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-02-24 03:06:30,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-02-24 03:06:30,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-02-24 03:06:30,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 116 states have internal predecessors, (118), 3 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) [2022-02-24 03:06:30,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2022-02-24 03:06:30,557 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 119 [2022-02-24 03:06:30,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:06:30,557 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2022-02-24 03:06:30,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 1.2105263157894737) internal successors, (115), 94 states have internal predecessors, (115), 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) [2022-02-24 03:06:30,558 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2022-02-24 03:06:30,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-02-24 03:06:30,558 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:06:30,558 INFO L514 BasicCegarLoop]: trace histogram [82, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:06:30,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-02-24 03:06:30,558 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:06:30,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:06:30,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1112994141, now seen corresponding path program 90 times [2022-02-24 03:06:30,558 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:06:30,559 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [237263328] [2022-02-24 03:06:30,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:06:30,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:06:30,909 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:06:30,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:06:30,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:06:30,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:06:30,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:06:34,586 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:06:34,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [237263328] [2022-02-24 03:06:34,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [237263328] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:06:34,587 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:06:34,587 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-02-24 03:06:34,587 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021849946] [2022-02-24 03:06:34,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:06:34,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-02-24 03:06:34,587 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:06:34,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-02-24 03:06:34,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=8920, Unknown=0, NotChecked=0, Total=9120 [2022-02-24 03:06:34,588 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand has 96 states, 96 states have (on average 1.2083333333333333) internal successors, (116), 95 states have internal predecessors, (116), 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) [2022-02-24 03:06:40,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:06:40,845 INFO L93 Difference]: Finished difference Result 130 states and 133 transitions. [2022-02-24 03:06:40,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-02-24 03:06:40,846 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.2083333333333333) internal successors, (116), 95 states have internal predecessors, (116), 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 120 [2022-02-24 03:06:40,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:06:40,846 INFO L225 Difference]: With dead ends: 130 [2022-02-24 03:06:40,846 INFO L226 Difference]: Without dead ends: 122 [2022-02-24 03:06:40,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 12 SyntacticMatches, 16 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6111 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=579, Invalid=34577, Unknown=0, NotChecked=0, Total=35156 [2022-02-24 03:06:40,849 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 18 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 9681 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 9795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 9681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-02-24 03:06:40,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 433 Invalid, 9795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 9681 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-02-24 03:06:40,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-02-24 03:06:40,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2022-02-24 03:06:40,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 117 states have (on average 1.017094017094017) internal successors, (119), 117 states have internal predecessors, (119), 3 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) [2022-02-24 03:06:40,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 123 transitions. [2022-02-24 03:06:40,869 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 123 transitions. Word has length 120 [2022-02-24 03:06:40,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:06:40,869 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 123 transitions. [2022-02-24 03:06:40,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.2083333333333333) internal successors, (116), 95 states have internal predecessors, (116), 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) [2022-02-24 03:06:40,869 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 123 transitions. [2022-02-24 03:06:40,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-02-24 03:06:40,870 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:06:40,870 INFO L514 BasicCegarLoop]: trace histogram [83, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:06:40,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-02-24 03:06:40,870 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:06:40,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:06:40,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1585846950, now seen corresponding path program 91 times [2022-02-24 03:06:40,871 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:06:40,871 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1955649322] [2022-02-24 03:06:40,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:06:40,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:06:41,241 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:06:41,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:06:41,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:06:41,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:06:41,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:06:45,091 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:06:45,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1955649322] [2022-02-24 03:06:45,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1955649322] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:06:45,091 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:06:45,091 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-02-24 03:06:45,091 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821524400] [2022-02-24 03:06:45,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:06:45,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-02-24 03:06:45,091 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:06:45,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-02-24 03:06:45,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=9110, Unknown=0, NotChecked=0, Total=9312 [2022-02-24 03:06:45,092 INFO L87 Difference]: Start difference. First operand 122 states and 123 transitions. Second operand has 97 states, 97 states have (on average 1.2061855670103092) internal successors, (117), 96 states have internal predecessors, (117), 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) [2022-02-24 03:06:51,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:06:51,229 INFO L93 Difference]: Finished difference Result 131 states and 134 transitions. [2022-02-24 03:06:51,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-02-24 03:06:51,229 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.2061855670103092) internal successors, (117), 96 states have internal predecessors, (117), 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 121 [2022-02-24 03:06:51,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:06:51,230 INFO L225 Difference]: With dead ends: 131 [2022-02-24 03:06:51,230 INFO L226 Difference]: Without dead ends: 123 [2022-02-24 03:06:51,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 14 SyntacticMatches, 14 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6214 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=585, Invalid=35325, Unknown=0, NotChecked=0, Total=35910 [2022-02-24 03:06:51,232 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 18 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 9778 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 9893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 9778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:06:51,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 433 Invalid, 9893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 9778 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-02-24 03:06:51,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-02-24 03:06:51,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2022-02-24 03:06:51,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.0169491525423728) internal successors, (120), 118 states have internal predecessors, (120), 3 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) [2022-02-24 03:06:51,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2022-02-24 03:06:51,245 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 121 [2022-02-24 03:06:51,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:06:51,245 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2022-02-24 03:06:51,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.2061855670103092) internal successors, (117), 96 states have internal predecessors, (117), 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) [2022-02-24 03:06:51,245 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2022-02-24 03:06:51,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-02-24 03:06:51,246 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:06:51,246 INFO L514 BasicCegarLoop]: trace histogram [84, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:06:51,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-02-24 03:06:51,246 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:06:51,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:06:51,246 INFO L85 PathProgramCache]: Analyzing trace with hash 935585155, now seen corresponding path program 92 times [2022-02-24 03:06:51,246 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:06:51,246 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [406221028] [2022-02-24 03:06:51,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:06:51,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:06:51,617 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:06:51,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:06:51,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:06:51,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:06:51,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:06:55,391 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:06:55,391 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [406221028] [2022-02-24 03:06:55,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [406221028] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:06:55,391 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:06:55,391 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-02-24 03:06:55,392 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402664177] [2022-02-24 03:06:55,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:06:55,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-02-24 03:06:55,392 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:06:55,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-02-24 03:06:55,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=9302, Unknown=0, NotChecked=0, Total=9506 [2022-02-24 03:06:55,393 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand has 98 states, 98 states have (on average 1.2040816326530612) internal successors, (118), 97 states have internal predecessors, (118), 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) [2022-02-24 03:07:01,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:07:01,631 INFO L93 Difference]: Finished difference Result 132 states and 135 transitions. [2022-02-24 03:07:01,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-02-24 03:07:01,632 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.2040816326530612) internal successors, (118), 97 states have internal predecessors, (118), 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 122 [2022-02-24 03:07:01,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:07:01,632 INFO L225 Difference]: With dead ends: 132 [2022-02-24 03:07:01,632 INFO L226 Difference]: Without dead ends: 124 [2022-02-24 03:07:01,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 11 SyntacticMatches, 17 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6351 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=591, Invalid=36081, Unknown=0, NotChecked=0, Total=36672 [2022-02-24 03:07:01,633 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 18 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 9875 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 9991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 9875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:07:01,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 433 Invalid, 9991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 9875 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-02-24 03:07:01,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-02-24 03:07:01,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-02-24 03:07:01,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 119 states have (on average 1.0168067226890756) internal successors, (121), 119 states have internal predecessors, (121), 3 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) [2022-02-24 03:07:01,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2022-02-24 03:07:01,654 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 122 [2022-02-24 03:07:01,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:07:01,654 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2022-02-24 03:07:01,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.2040816326530612) internal successors, (118), 97 states have internal predecessors, (118), 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) [2022-02-24 03:07:01,654 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2022-02-24 03:07:01,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-02-24 03:07:01,655 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:07:01,655 INFO L514 BasicCegarLoop]: trace histogram [85, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:07:01,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-02-24 03:07:01,655 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:07:01,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:07:01,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1790569082, now seen corresponding path program 93 times [2022-02-24 03:07:01,656 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:07:01,656 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1825027319] [2022-02-24 03:07:01,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:07:01,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:07:02,058 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:07:02,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:07:02,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:07:02,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:07:02,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:07:05,835 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:07:05,836 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1825027319] [2022-02-24 03:07:05,836 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1825027319] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:07:05,836 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:07:05,836 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-02-24 03:07:05,836 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528964903] [2022-02-24 03:07:05,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:07:05,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-02-24 03:07:05,836 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:07:05,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-02-24 03:07:05,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=9496, Unknown=0, NotChecked=0, Total=9702 [2022-02-24 03:07:05,837 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand has 99 states, 99 states have (on average 1.202020202020202) internal successors, (119), 98 states have internal predecessors, (119), 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) [2022-02-24 03:07:12,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:07:12,281 INFO L93 Difference]: Finished difference Result 133 states and 136 transitions. [2022-02-24 03:07:12,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-02-24 03:07:12,281 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.202020202020202) internal successors, (119), 98 states have internal predecessors, (119), 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 123 [2022-02-24 03:07:12,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:07:12,282 INFO L225 Difference]: With dead ends: 133 [2022-02-24 03:07:12,282 INFO L226 Difference]: Without dead ends: 125 [2022-02-24 03:07:12,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 14 SyntacticMatches, 14 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6445 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=597, Invalid=36845, Unknown=0, NotChecked=0, Total=37442 [2022-02-24 03:07:12,285 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 18 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 10388 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 10505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 10388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:07:12,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 453 Invalid, 10505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 10388 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-02-24 03:07:12,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-02-24 03:07:12,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2022-02-24 03:07:12,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.0166666666666666) internal successors, (122), 120 states have internal predecessors, (122), 3 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) [2022-02-24 03:07:12,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2022-02-24 03:07:12,313 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 123 [2022-02-24 03:07:12,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:07:12,313 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2022-02-24 03:07:12,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.202020202020202) internal successors, (119), 98 states have internal predecessors, (119), 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) [2022-02-24 03:07:12,313 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2022-02-24 03:07:12,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-02-24 03:07:12,314 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:07:12,314 INFO L514 BasicCegarLoop]: trace histogram [86, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:07:12,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-02-24 03:07:12,314 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:07:12,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:07:12,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1769700253, now seen corresponding path program 94 times [2022-02-24 03:07:12,315 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:07:12,315 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1799992786] [2022-02-24 03:07:12,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:07:12,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:07:12,684 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:07:12,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:07:12,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:07:12,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:07:12,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:07:16,532 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:07:16,532 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1799992786] [2022-02-24 03:07:16,532 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1799992786] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:07:16,532 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:07:16,532 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-02-24 03:07:16,532 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858564117] [2022-02-24 03:07:16,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:07:16,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-02-24 03:07:16,533 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:07:16,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-02-24 03:07:16,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=9692, Unknown=0, NotChecked=0, Total=9900 [2022-02-24 03:07:16,533 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand has 100 states, 100 states have (on average 1.2) internal successors, (120), 99 states have internal predecessors, (120), 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) [2022-02-24 03:07:23,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:07:23,077 INFO L93 Difference]: Finished difference Result 134 states and 137 transitions. [2022-02-24 03:07:23,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-02-24 03:07:23,077 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.2) internal successors, (120), 99 states have internal predecessors, (120), 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 124 [2022-02-24 03:07:23,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:07:23,078 INFO L225 Difference]: With dead ends: 134 [2022-02-24 03:07:23,078 INFO L226 Difference]: Without dead ends: 126 [2022-02-24 03:07:23,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 11 SyntacticMatches, 17 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6573 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=603, Invalid=37617, Unknown=0, NotChecked=0, Total=38220 [2022-02-24 03:07:23,080 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 18 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 10384 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 10502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 10384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:07:23,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 448 Invalid, 10502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 10384 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-02-24 03:07:23,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-02-24 03:07:23,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2022-02-24 03:07:23,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 121 states have (on average 1.0165289256198347) internal successors, (123), 121 states have internal predecessors, (123), 3 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) [2022-02-24 03:07:23,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2022-02-24 03:07:23,109 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 124 [2022-02-24 03:07:23,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:07:23,109 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2022-02-24 03:07:23,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.2) internal successors, (120), 99 states have internal predecessors, (120), 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) [2022-02-24 03:07:23,109 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2022-02-24 03:07:23,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-02-24 03:07:23,110 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:07:23,110 INFO L514 BasicCegarLoop]: trace histogram [87, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:07:23,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-02-24 03:07:23,110 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:07:23,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:07:23,110 INFO L85 PathProgramCache]: Analyzing trace with hash -468899942, now seen corresponding path program 95 times [2022-02-24 03:07:23,110 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:07:23,110 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1262025572] [2022-02-24 03:07:23,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:07:23,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:07:23,507 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:07:23,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:07:23,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:07:23,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:07:23,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:07:27,375 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:07:27,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1262025572] [2022-02-24 03:07:27,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1262025572] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:07:27,375 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:07:27,375 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-02-24 03:07:27,375 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275233087] [2022-02-24 03:07:27,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:07:27,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-02-24 03:07:27,376 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:07:27,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-02-24 03:07:27,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=9890, Unknown=0, NotChecked=0, Total=10100 [2022-02-24 03:07:27,377 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand has 101 states, 101 states have (on average 1.198019801980198) internal successors, (121), 100 states have internal predecessors, (121), 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) [2022-02-24 03:07:34,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:07:34,079 INFO L93 Difference]: Finished difference Result 135 states and 138 transitions. [2022-02-24 03:07:34,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-02-24 03:07:34,080 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.198019801980198) internal successors, (121), 100 states have internal predecessors, (121), 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 125 [2022-02-24 03:07:34,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:07:34,080 INFO L225 Difference]: With dead ends: 135 [2022-02-24 03:07:34,080 INFO L226 Difference]: Without dead ends: 127 [2022-02-24 03:07:34,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 13 SyntacticMatches, 15 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6669 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=609, Invalid=38397, Unknown=0, NotChecked=0, Total=39006 [2022-02-24 03:07:34,081 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 18 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 10802 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 10921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 10802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:07:34,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 463 Invalid, 10921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 10802 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-02-24 03:07:34,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-02-24 03:07:34,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-02-24 03:07:34,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.0163934426229508) internal successors, (124), 122 states have internal predecessors, (124), 3 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) [2022-02-24 03:07:34,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2022-02-24 03:07:34,095 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 125 [2022-02-24 03:07:34,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:07:34,095 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2022-02-24 03:07:34,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.198019801980198) internal successors, (121), 100 states have internal predecessors, (121), 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) [2022-02-24 03:07:34,095 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2022-02-24 03:07:34,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-02-24 03:07:34,096 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:07:34,096 INFO L514 BasicCegarLoop]: trace histogram [88, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:07:34,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-02-24 03:07:34,096 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:07:34,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:07:34,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1201204035, now seen corresponding path program 96 times [2022-02-24 03:07:34,096 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:07:34,096 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [84561359] [2022-02-24 03:07:34,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:07:34,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:07:34,461 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:07:34,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:07:34,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:07:34,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:07:34,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:07:38,347 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:07:38,348 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [84561359] [2022-02-24 03:07:38,348 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [84561359] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:07:38,348 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:07:38,348 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-02-24 03:07:38,348 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65061674] [2022-02-24 03:07:38,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:07:38,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-02-24 03:07:38,348 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:07:38,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-02-24 03:07:38,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=10090, Unknown=0, NotChecked=0, Total=10302 [2022-02-24 03:07:38,349 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand has 102 states, 102 states have (on average 1.196078431372549) internal successors, (122), 101 states have internal predecessors, (122), 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) [2022-02-24 03:07:45,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:07:45,373 INFO L93 Difference]: Finished difference Result 136 states and 139 transitions. [2022-02-24 03:07:45,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-02-24 03:07:45,373 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.196078431372549) internal successors, (122), 101 states have internal predecessors, (122), 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 126 [2022-02-24 03:07:45,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:07:45,374 INFO L225 Difference]: With dead ends: 136 [2022-02-24 03:07:45,374 INFO L226 Difference]: Without dead ends: 128 [2022-02-24 03:07:45,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 15 SyntacticMatches, 13 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6777 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=615, Invalid=39185, Unknown=0, NotChecked=0, Total=39800 [2022-02-24 03:07:45,376 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 18 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 11654 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 11774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 11654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:07:45,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 498 Invalid, 11774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 11654 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-02-24 03:07:45,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-02-24 03:07:45,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2022-02-24 03:07:45,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 123 states have (on average 1.016260162601626) internal successors, (125), 123 states have internal predecessors, (125), 3 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) [2022-02-24 03:07:45,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 129 transitions. [2022-02-24 03:07:45,390 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 129 transitions. Word has length 126 [2022-02-24 03:07:45,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:07:45,390 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 129 transitions. [2022-02-24 03:07:45,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.196078431372549) internal successors, (122), 101 states have internal predecessors, (122), 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) [2022-02-24 03:07:45,390 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 129 transitions. [2022-02-24 03:07:45,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-02-24 03:07:45,391 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:07:45,391 INFO L514 BasicCegarLoop]: trace histogram [89, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:07:45,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-02-24 03:07:45,391 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:07:45,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:07:45,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1434819770, now seen corresponding path program 97 times [2022-02-24 03:07:45,391 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:07:45,391 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1604023611] [2022-02-24 03:07:45,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:07:45,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:07:45,758 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:07:45,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:07:45,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:07:45,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:07:45,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:07:49,758 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:07:49,758 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1604023611] [2022-02-24 03:07:49,758 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1604023611] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:07:49,758 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:07:49,758 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-02-24 03:07:49,758 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405537192] [2022-02-24 03:07:49,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:07:49,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-02-24 03:07:49,759 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:07:49,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-02-24 03:07:49,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=10292, Unknown=0, NotChecked=0, Total=10506 [2022-02-24 03:07:49,760 INFO L87 Difference]: Start difference. First operand 128 states and 129 transitions. Second operand has 103 states, 103 states have (on average 1.1941747572815533) internal successors, (123), 102 states have internal predecessors, (123), 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) [2022-02-24 03:07:56,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:07:56,919 INFO L93 Difference]: Finished difference Result 139 states and 143 transitions. [2022-02-24 03:07:56,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-02-24 03:07:56,920 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.1941747572815533) internal successors, (123), 102 states have internal predecessors, (123), 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 127 [2022-02-24 03:07:56,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:07:56,920 INFO L225 Difference]: With dead ends: 139 [2022-02-24 03:07:56,921 INFO L226 Difference]: Without dead ends: 131 [2022-02-24 03:07:56,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 13 SyntacticMatches, 15 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6930 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=621, Invalid=39981, Unknown=0, NotChecked=0, Total=40602 [2022-02-24 03:07:56,923 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 20 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 11738 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 11862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 11738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:07:56,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 488 Invalid, 11862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 11738 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-02-24 03:07:56,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-02-24 03:07:56,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2022-02-24 03:07:56,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.016) internal successors, (127), 125 states have internal predecessors, (127), 3 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) [2022-02-24 03:07:56,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 131 transitions. [2022-02-24 03:07:56,939 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 131 transitions. Word has length 127 [2022-02-24 03:07:56,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:07:56,939 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 131 transitions. [2022-02-24 03:07:56,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.1941747572815533) internal successors, (123), 102 states have internal predecessors, (123), 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) [2022-02-24 03:07:56,939 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 131 transitions. [2022-02-24 03:07:56,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-02-24 03:07:56,940 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:07:56,940 INFO L514 BasicCegarLoop]: trace histogram [90, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:07:56,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-02-24 03:07:56,940 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:07:56,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:07:56,940 INFO L85 PathProgramCache]: Analyzing trace with hash 86972963, now seen corresponding path program 98 times [2022-02-24 03:07:56,940 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:07:56,941 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1113884284] [2022-02-24 03:07:56,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:07:56,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:07:57,208 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:07:57,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:07:57,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:07:57,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:07:57,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:08:01,383 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:08:01,383 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1113884284] [2022-02-24 03:08:01,383 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1113884284] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:08:01,383 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:08:01,383 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-02-24 03:08:01,383 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503817264] [2022-02-24 03:08:01,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:08:01,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-02-24 03:08:01,384 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:08:01,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-02-24 03:08:01,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=10496, Unknown=0, NotChecked=0, Total=10712 [2022-02-24 03:08:01,385 INFO L87 Difference]: Start difference. First operand 130 states and 131 transitions. Second operand has 104 states, 104 states have (on average 1.1923076923076923) internal successors, (124), 103 states have internal predecessors, (124), 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) [2022-02-24 03:08:08,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:08:08,552 INFO L93 Difference]: Finished difference Result 137 states and 138 transitions. [2022-02-24 03:08:08,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-02-24 03:08:08,553 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 1.1923076923076923) internal successors, (124), 103 states have internal predecessors, (124), 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 128 [2022-02-24 03:08:08,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:08:08,553 INFO L225 Difference]: With dead ends: 137 [2022-02-24 03:08:08,553 INFO L226 Difference]: Without dead ends: 132 [2022-02-24 03:08:08,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 10 SyntacticMatches, 17 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7073 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=627, Invalid=40785, Unknown=0, NotChecked=0, Total=41412 [2022-02-24 03:08:08,555 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 19 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 11513 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 11636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 11513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:08:08,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 473 Invalid, 11636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 11513 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-02-24 03:08:08,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-02-24 03:08:08,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2022-02-24 03:08:08,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 127 states have (on average 1.015748031496063) internal successors, (129), 127 states have internal predecessors, (129), 3 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) [2022-02-24 03:08:08,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 133 transitions. [2022-02-24 03:08:08,570 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 133 transitions. Word has length 128 [2022-02-24 03:08:08,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:08:08,570 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 133 transitions. [2022-02-24 03:08:08,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 1.1923076923076923) internal successors, (124), 103 states have internal predecessors, (124), 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) [2022-02-24 03:08:08,570 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 133 transitions. [2022-02-24 03:08:08,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-02-24 03:08:08,571 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:08:08,571 INFO L514 BasicCegarLoop]: trace histogram [90, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:08:08,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-02-24 03:08:08,571 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:08:08,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:08:08,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1950512361, now seen corresponding path program 99 times [2022-02-24 03:08:08,572 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:08:08,572 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [348280034] [2022-02-24 03:08:08,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:08:08,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:08:08,973 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:08:08,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:08:09,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:08:09,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:08:09,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:08:13,244 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:08:13,244 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [348280034] [2022-02-24 03:08:13,244 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [348280034] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:08:13,244 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:08:13,244 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-02-24 03:08:13,244 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446379559] [2022-02-24 03:08:13,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:08:13,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-02-24 03:08:13,245 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:08:13,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-02-24 03:08:13,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=10702, Unknown=0, NotChecked=0, Total=10920 [2022-02-24 03:08:13,246 INFO L87 Difference]: Start difference. First operand 132 states and 133 transitions. Second operand has 105 states, 105 states have (on average 1.2095238095238094) internal successors, (127), 104 states have internal predecessors, (127), 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) [2022-02-24 03:08:20,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:08:20,565 INFO L93 Difference]: Finished difference Result 141 states and 144 transitions. [2022-02-24 03:08:20,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-02-24 03:08:20,566 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.2095238095238094) internal successors, (127), 104 states have internal predecessors, (127), 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 131 [2022-02-24 03:08:20,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:08:20,566 INFO L225 Difference]: With dead ends: 141 [2022-02-24 03:08:20,566 INFO L226 Difference]: Without dead ends: 133 [2022-02-24 03:08:20,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 14 SyntacticMatches, 16 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7173 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=633, Invalid=41597, Unknown=0, NotChecked=0, Total=42230 [2022-02-24 03:08:20,568 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 19 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 11842 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 11966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 11842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:08:20,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 483 Invalid, 11966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 11842 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-02-24 03:08:20,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-02-24 03:08:20,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2022-02-24 03:08:20,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.015625) internal successors, (130), 128 states have internal predecessors, (130), 3 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) [2022-02-24 03:08:20,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2022-02-24 03:08:20,582 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 131 [2022-02-24 03:08:20,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:08:20,583 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2022-02-24 03:08:20,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.2095238095238094) internal successors, (127), 104 states have internal predecessors, (127), 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) [2022-02-24 03:08:20,583 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2022-02-24 03:08:20,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-02-24 03:08:20,583 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:08:20,583 INFO L514 BasicCegarLoop]: trace histogram [91, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:08:20,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-02-24 03:08:20,583 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:08:20,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:08:20,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1106425900, now seen corresponding path program 100 times [2022-02-24 03:08:20,584 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:08:20,584 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1840430983] [2022-02-24 03:08:20,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:08:20,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:08:20,958 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:08:20,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:08:20,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:08:20,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:08:20,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:08:25,286 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:08:25,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1840430983] [2022-02-24 03:08:25,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1840430983] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:08:25,286 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:08:25,286 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-02-24 03:08:25,286 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052027799] [2022-02-24 03:08:25,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:08:25,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-02-24 03:08:25,287 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:08:25,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-02-24 03:08:25,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=10910, Unknown=0, NotChecked=0, Total=11130 [2022-02-24 03:08:25,288 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand has 106 states, 106 states have (on average 1.2075471698113207) internal successors, (128), 105 states have internal predecessors, (128), 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) [2022-02-24 03:08:32,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:08:32,690 INFO L93 Difference]: Finished difference Result 142 states and 145 transitions. [2022-02-24 03:08:32,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-02-24 03:08:32,690 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 1.2075471698113207) internal successors, (128), 105 states have internal predecessors, (128), 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 132 [2022-02-24 03:08:32,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:08:32,691 INFO L225 Difference]: With dead ends: 142 [2022-02-24 03:08:32,691 INFO L226 Difference]: Without dead ends: 134 [2022-02-24 03:08:32,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 12 SyntacticMatches, 18 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7307 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=639, Invalid=42417, Unknown=0, NotChecked=0, Total=43056 [2022-02-24 03:08:32,694 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 19 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 11836 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 11961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 11836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:08:32,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 478 Invalid, 11961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 11836 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-02-24 03:08:32,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-02-24 03:08:32,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2022-02-24 03:08:32,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 129 states have (on average 1.0155038759689923) internal successors, (131), 129 states have internal predecessors, (131), 3 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) [2022-02-24 03:08:32,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 135 transitions. [2022-02-24 03:08:32,718 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 135 transitions. Word has length 132 [2022-02-24 03:08:32,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:08:32,719 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 135 transitions. [2022-02-24 03:08:32,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 1.2075471698113207) internal successors, (128), 105 states have internal predecessors, (128), 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) [2022-02-24 03:08:32,719 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 135 transitions. [2022-02-24 03:08:32,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-02-24 03:08:32,719 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:08:32,719 INFO L514 BasicCegarLoop]: trace histogram [92, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:08:32,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-02-24 03:08:32,720 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:08:32,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:08:32,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1382231479, now seen corresponding path program 101 times [2022-02-24 03:08:32,720 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:08:32,720 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [522520070] [2022-02-24 03:08:32,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:08:32,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:08:33,114 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:08:33,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:08:33,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:08:33,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:08:33,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:08:37,461 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:08:37,461 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [522520070] [2022-02-24 03:08:37,461 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [522520070] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:08:37,461 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:08:37,461 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-02-24 03:08:37,461 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093043603] [2022-02-24 03:08:37,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:08:37,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-02-24 03:08:37,462 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:08:37,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-02-24 03:08:37,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=11120, Unknown=0, NotChecked=0, Total=11342 [2022-02-24 03:08:37,463 INFO L87 Difference]: Start difference. First operand 134 states and 135 transitions. Second operand has 107 states, 107 states have (on average 1.205607476635514) internal successors, (129), 106 states have internal predecessors, (129), 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) [2022-02-24 03:08:45,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:08:45,195 INFO L93 Difference]: Finished difference Result 143 states and 146 transitions. [2022-02-24 03:08:45,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-02-24 03:08:45,196 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.205607476635514) internal successors, (129), 106 states have internal predecessors, (129), 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 133 [2022-02-24 03:08:45,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:08:45,197 INFO L225 Difference]: With dead ends: 143 [2022-02-24 03:08:45,197 INFO L226 Difference]: Without dead ends: 135 [2022-02-24 03:08:45,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 13 SyntacticMatches, 17 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7420 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=645, Invalid=43245, Unknown=0, NotChecked=0, Total=43890 [2022-02-24 03:08:45,201 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 19 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 12854 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 12980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 12854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-02-24 03:08:45,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 518 Invalid, 12980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 12854 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-02-24 03:08:45,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-02-24 03:08:45,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2022-02-24 03:08:45,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.0153846153846153) internal successors, (132), 130 states have internal predecessors, (132), 3 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) [2022-02-24 03:08:45,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2022-02-24 03:08:45,222 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 133 [2022-02-24 03:08:45,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:08:45,222 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2022-02-24 03:08:45,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.205607476635514) internal successors, (129), 106 states have internal predecessors, (129), 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) [2022-02-24 03:08:45,222 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2022-02-24 03:08:45,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-02-24 03:08:45,223 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:08:45,223 INFO L514 BasicCegarLoop]: trace histogram [93, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:08:45,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-02-24 03:08:45,223 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:08:45,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:08:45,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1342269836, now seen corresponding path program 102 times [2022-02-24 03:08:45,223 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:08:45,223 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [446560031] [2022-02-24 03:08:45,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:08:45,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:08:45,608 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:08:45,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:08:45,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:08:45,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:08:45,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:08:50,143 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:08:50,144 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [446560031] [2022-02-24 03:08:50,144 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [446560031] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:08:50,144 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:08:50,144 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-02-24 03:08:50,144 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570260452] [2022-02-24 03:08:50,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:08:50,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-02-24 03:08:50,144 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:08:50,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-02-24 03:08:50,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=11332, Unknown=0, NotChecked=0, Total=11556 [2022-02-24 03:08:50,145 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand has 108 states, 108 states have (on average 1.2037037037037037) internal successors, (130), 107 states have internal predecessors, (130), 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) [2022-02-24 03:08:57,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:08:57,908 INFO L93 Difference]: Finished difference Result 144 states and 147 transitions. [2022-02-24 03:08:57,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-02-24 03:08:57,908 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 1.2037037037037037) internal successors, (130), 107 states have internal predecessors, (130), 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 134 [2022-02-24 03:08:57,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:08:57,909 INFO L225 Difference]: With dead ends: 144 [2022-02-24 03:08:57,909 INFO L226 Difference]: Without dead ends: 136 [2022-02-24 03:08:57,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 11 SyntacticMatches, 19 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7567 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=651, Invalid=44081, Unknown=0, NotChecked=0, Total=44732 [2022-02-24 03:08:57,911 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 19 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 12508 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 12635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 12508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:08:57,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 498 Invalid, 12635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 12508 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-02-24 03:08:57,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-02-24 03:08:57,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2022-02-24 03:08:57,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.015267175572519) internal successors, (133), 131 states have internal predecessors, (133), 3 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) [2022-02-24 03:08:57,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 137 transitions. [2022-02-24 03:08:57,933 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 137 transitions. Word has length 134 [2022-02-24 03:08:57,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:08:57,934 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 137 transitions. [2022-02-24 03:08:57,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 1.2037037037037037) internal successors, (130), 107 states have internal predecessors, (130), 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) [2022-02-24 03:08:57,934 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 137 transitions. [2022-02-24 03:08:57,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-02-24 03:08:57,934 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:08:57,934 INFO L514 BasicCegarLoop]: trace histogram [94, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:08:57,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-02-24 03:08:57,935 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:08:57,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:08:57,935 INFO L85 PathProgramCache]: Analyzing trace with hash -103458903, now seen corresponding path program 103 times [2022-02-24 03:08:57,935 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:08:57,935 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1826421084] [2022-02-24 03:08:57,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:08:57,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:08:58,359 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:08:58,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:08:58,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:08:58,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:08:58,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:09:02,842 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:09:02,843 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1826421084] [2022-02-24 03:09:02,843 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1826421084] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:09:02,843 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:09:02,843 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-02-24 03:09:02,843 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422539943] [2022-02-24 03:09:02,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:09:02,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-02-24 03:09:02,843 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:09:02,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-02-24 03:09:02,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=11546, Unknown=0, NotChecked=0, Total=11772 [2022-02-24 03:09:02,844 INFO L87 Difference]: Start difference. First operand 136 states and 137 transitions. Second operand has 109 states, 109 states have (on average 1.201834862385321) internal successors, (131), 108 states have internal predecessors, (131), 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) [2022-02-24 03:09:10,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:09:10,794 INFO L93 Difference]: Finished difference Result 145 states and 148 transitions. [2022-02-24 03:09:10,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-02-24 03:09:10,795 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 1.201834862385321) internal successors, (131), 108 states have internal predecessors, (131), 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 135 [2022-02-24 03:09:10,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:09:10,795 INFO L225 Difference]: With dead ends: 145 [2022-02-24 03:09:10,795 INFO L226 Difference]: Without dead ends: 137 [2022-02-24 03:09:10,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 14 SyntacticMatches, 16 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7660 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=657, Invalid=44925, Unknown=0, NotChecked=0, Total=45582 [2022-02-24 03:09:10,799 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 19 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 12966 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 13094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 12966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-02-24 03:09:10,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 513 Invalid, 13094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 12966 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-02-24 03:09:10,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-02-24 03:09:10,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2022-02-24 03:09:10,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.0151515151515151) internal successors, (134), 132 states have internal predecessors, (134), 3 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) [2022-02-24 03:09:10,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2022-02-24 03:09:10,815 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 135 [2022-02-24 03:09:10,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:09:10,815 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2022-02-24 03:09:10,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 1.201834862385321) internal successors, (131), 108 states have internal predecessors, (131), 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) [2022-02-24 03:09:10,815 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2022-02-24 03:09:10,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-02-24 03:09:10,816 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:09:10,816 INFO L514 BasicCegarLoop]: trace histogram [95, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:09:10,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-02-24 03:09:10,816 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:09:10,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:09:10,816 INFO L85 PathProgramCache]: Analyzing trace with hash -355025644, now seen corresponding path program 104 times [2022-02-24 03:09:10,816 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:09:10,816 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1646304071] [2022-02-24 03:09:10,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:09:10,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:09:11,199 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:09:11,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:09:11,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:09:11,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:09:11,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:09:15,863 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:09:15,863 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1646304071] [2022-02-24 03:09:15,863 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1646304071] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:09:15,863 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:09:15,863 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-02-24 03:09:15,863 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382412978] [2022-02-24 03:09:15,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:09:15,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-02-24 03:09:15,864 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:09:15,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-02-24 03:09:15,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=11762, Unknown=0, NotChecked=0, Total=11990 [2022-02-24 03:09:15,865 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand has 110 states, 110 states have (on average 1.2) internal successors, (132), 109 states have internal predecessors, (132), 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) [2022-02-24 03:09:23,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:09:23,989 INFO L93 Difference]: Finished difference Result 146 states and 149 transitions. [2022-02-24 03:09:23,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-02-24 03:09:23,989 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 1.2) internal successors, (132), 109 states have internal predecessors, (132), 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 136 [2022-02-24 03:09:23,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:09:23,990 INFO L225 Difference]: With dead ends: 146 [2022-02-24 03:09:23,990 INFO L226 Difference]: Without dead ends: 138 [2022-02-24 03:09:23,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 15 SyntacticMatches, 15 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7798 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=663, Invalid=45777, Unknown=0, NotChecked=0, Total=46440 [2022-02-24 03:09:23,991 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 19 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 13196 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 13325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 13196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:09:23,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 518 Invalid, 13325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 13196 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-02-24 03:09:23,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-02-24 03:09:24,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2022-02-24 03:09:24,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 133 states have (on average 1.0150375939849625) internal successors, (135), 133 states have internal predecessors, (135), 3 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) [2022-02-24 03:09:24,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 139 transitions. [2022-02-24 03:09:24,006 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 139 transitions. Word has length 136 [2022-02-24 03:09:24,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:09:24,006 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 139 transitions. [2022-02-24 03:09:24,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 1.2) internal successors, (132), 109 states have internal predecessors, (132), 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) [2022-02-24 03:09:24,006 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 139 transitions. [2022-02-24 03:09:24,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-02-24 03:09:24,007 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:09:24,007 INFO L514 BasicCegarLoop]: trace histogram [96, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:09:24,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-02-24 03:09:24,007 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:09:24,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:09:24,007 INFO L85 PathProgramCache]: Analyzing trace with hash 436339977, now seen corresponding path program 105 times [2022-02-24 03:09:24,007 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:09:24,007 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1697271388] [2022-02-24 03:09:24,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:09:24,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:09:24,389 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:09:24,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:09:24,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:09:24,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:09:24,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:09:29,169 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:09:29,169 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1697271388] [2022-02-24 03:09:29,169 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1697271388] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:09:29,169 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:09:29,169 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-02-24 03:09:29,169 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083549434] [2022-02-24 03:09:29,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:09:29,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-02-24 03:09:29,170 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:09:29,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-02-24 03:09:29,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=11980, Unknown=0, NotChecked=0, Total=12210 [2022-02-24 03:09:29,171 INFO L87 Difference]: Start difference. First operand 138 states and 139 transitions. Second operand has 111 states, 111 states have (on average 1.1981981981981982) internal successors, (133), 110 states have internal predecessors, (133), 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) [2022-02-24 03:09:37,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:09:37,624 INFO L93 Difference]: Finished difference Result 147 states and 150 transitions. [2022-02-24 03:09:37,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-02-24 03:09:37,625 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 1.1981981981981982) internal successors, (133), 110 states have internal predecessors, (133), 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 137 [2022-02-24 03:09:37,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:09:37,625 INFO L225 Difference]: With dead ends: 147 [2022-02-24 03:09:37,625 INFO L226 Difference]: Without dead ends: 139 [2022-02-24 03:09:37,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 13 SyntacticMatches, 17 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7926 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=669, Invalid=46637, Unknown=0, NotChecked=0, Total=47306 [2022-02-24 03:09:37,627 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 19 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 14018 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 14148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 14018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:09:37,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 548 Invalid, 14148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 14018 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-02-24 03:09:37,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-02-24 03:09:37,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2022-02-24 03:09:37,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.0149253731343284) internal successors, (136), 134 states have internal predecessors, (136), 3 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) [2022-02-24 03:09:37,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2022-02-24 03:09:37,647 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 137 [2022-02-24 03:09:37,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:09:37,647 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2022-02-24 03:09:37,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 1.1981981981981982) internal successors, (133), 110 states have internal predecessors, (133), 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) [2022-02-24 03:09:37,648 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2022-02-24 03:09:37,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-02-24 03:09:37,648 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:09:37,648 INFO L514 BasicCegarLoop]: trace histogram [97, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:09:37,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-02-24 03:09:37,648 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:09:37,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:09:37,649 INFO L85 PathProgramCache]: Analyzing trace with hash -801129548, now seen corresponding path program 106 times [2022-02-24 03:09:37,649 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:09:37,649 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1566075597] [2022-02-24 03:09:37,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:09:37,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:09:38,093 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:09:38,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:09:38,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:09:38,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:09:38,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:09:42,987 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:09:42,988 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1566075597] [2022-02-24 03:09:42,988 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1566075597] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:09:42,988 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:09:42,988 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-02-24 03:09:42,988 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805427821] [2022-02-24 03:09:42,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:09:42,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-02-24 03:09:42,988 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:09:42,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-02-24 03:09:42,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=12200, Unknown=0, NotChecked=0, Total=12432 [2022-02-24 03:09:42,990 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand has 112 states, 112 states have (on average 1.1964285714285714) internal successors, (134), 111 states have internal predecessors, (134), 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) [2022-02-24 03:09:51,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:09:51,376 INFO L93 Difference]: Finished difference Result 148 states and 151 transitions. [2022-02-24 03:09:51,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-02-24 03:09:51,377 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 1.1964285714285714) internal successors, (134), 111 states have internal predecessors, (134), 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 138 [2022-02-24 03:09:51,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:09:51,377 INFO L225 Difference]: With dead ends: 148 [2022-02-24 03:09:51,377 INFO L226 Difference]: Without dead ends: 140 [2022-02-24 03:09:51,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 12 SyntacticMatches, 18 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8066 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=675, Invalid=47505, Unknown=0, NotChecked=0, Total=48180 [2022-02-24 03:09:51,379 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 19 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 13543 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 13674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 13543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-02-24 03:09:51,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 523 Invalid, 13674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 13543 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-02-24 03:09:51,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-02-24 03:09:51,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2022-02-24 03:09:51,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 135 states have (on average 1.0148148148148148) internal successors, (137), 135 states have internal predecessors, (137), 3 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) [2022-02-24 03:09:51,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 141 transitions. [2022-02-24 03:09:51,394 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 141 transitions. Word has length 138 [2022-02-24 03:09:51,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:09:51,394 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 141 transitions. [2022-02-24 03:09:51,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 1.1964285714285714) internal successors, (134), 111 states have internal predecessors, (134), 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) [2022-02-24 03:09:51,394 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 141 transitions. [2022-02-24 03:09:51,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-02-24 03:09:51,395 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:09:51,395 INFO L514 BasicCegarLoop]: trace histogram [98, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:09:51,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-02-24 03:09:51,395 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:09:51,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:09:51,395 INFO L85 PathProgramCache]: Analyzing trace with hash -507979159, now seen corresponding path program 107 times [2022-02-24 03:09:51,395 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:09:51,395 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [371658894] [2022-02-24 03:09:51,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:09:51,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:09:51,782 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:09:51,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:09:51,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:09:51,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:09:51,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:09:56,661 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:09:56,661 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [371658894] [2022-02-24 03:09:56,661 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [371658894] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:09:56,661 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:09:56,661 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-02-24 03:09:56,661 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346356419] [2022-02-24 03:09:56,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:09:56,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-02-24 03:09:56,661 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:09:56,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-02-24 03:09:56,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=12422, Unknown=0, NotChecked=0, Total=12656 [2022-02-24 03:09:56,662 INFO L87 Difference]: Start difference. First operand 140 states and 141 transitions. Second operand has 113 states, 113 states have (on average 1.1946902654867257) internal successors, (135), 112 states have internal predecessors, (135), 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) [2022-02-24 03:10:05,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:10:05,274 INFO L93 Difference]: Finished difference Result 149 states and 152 transitions. [2022-02-24 03:10:05,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-02-24 03:10:05,275 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 1.1946902654867257) internal successors, (135), 112 states have internal predecessors, (135), 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 139 [2022-02-24 03:10:05,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:10:05,275 INFO L225 Difference]: With dead ends: 149 [2022-02-24 03:10:05,275 INFO L226 Difference]: Without dead ends: 141 [2022-02-24 03:10:05,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 13 SyntacticMatches, 17 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8185 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=681, Invalid=48381, Unknown=0, NotChecked=0, Total=49062 [2022-02-24 03:10:05,279 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 19 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 14018 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 14150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 14018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:10:05,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 538 Invalid, 14150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 14018 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-02-24 03:10:05,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-02-24 03:10:05,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2022-02-24 03:10:05,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.0147058823529411) internal successors, (138), 136 states have internal predecessors, (138), 3 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) [2022-02-24 03:10:05,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2022-02-24 03:10:05,308 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 139 [2022-02-24 03:10:05,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:10:05,309 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2022-02-24 03:10:05,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 1.1946902654867257) internal successors, (135), 112 states have internal predecessors, (135), 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) [2022-02-24 03:10:05,309 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2022-02-24 03:10:05,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-02-24 03:10:05,309 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:10:05,309 INFO L514 BasicCegarLoop]: trace histogram [99, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:10:05,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-02-24 03:10:05,310 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:10:05,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:10:05,310 INFO L85 PathProgramCache]: Analyzing trace with hash -10251692, now seen corresponding path program 108 times [2022-02-24 03:10:05,310 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:10:05,310 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444461270] [2022-02-24 03:10:05,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:10:05,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:10:05,699 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:10:05,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:10:05,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:10:05,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:10:05,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:10:10,756 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:10:10,756 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444461270] [2022-02-24 03:10:10,756 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1444461270] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:10:10,756 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:10:10,756 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-02-24 03:10:10,756 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957764126] [2022-02-24 03:10:10,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:10:10,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-02-24 03:10:10,757 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:10:10,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-02-24 03:10:10,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=12646, Unknown=0, NotChecked=0, Total=12882 [2022-02-24 03:10:10,758 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand has 114 states, 114 states have (on average 1.1929824561403508) internal successors, (136), 113 states have internal predecessors, (136), 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) [2022-02-24 03:10:19,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:10:19,457 INFO L93 Difference]: Finished difference Result 152 states and 156 transitions. [2022-02-24 03:10:19,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-02-24 03:10:19,457 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 1.1929824561403508) internal successors, (136), 113 states have internal predecessors, (136), 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 140 [2022-02-24 03:10:19,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:10:19,458 INFO L225 Difference]: With dead ends: 152 [2022-02-24 03:10:19,458 INFO L226 Difference]: Without dead ends: 144 [2022-02-24 03:10:19,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 10 SyntacticMatches, 20 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8349 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=687, Invalid=49265, Unknown=0, NotChecked=0, Total=49952 [2022-02-24 03:10:19,462 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 21 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 13977 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 14113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 13977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:10:19,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 523 Invalid, 14113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 13977 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-02-24 03:10:19,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-02-24 03:10:19,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2022-02-24 03:10:19,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.0144927536231885) internal successors, (140), 138 states have internal predecessors, (140), 3 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) [2022-02-24 03:10:19,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 144 transitions. [2022-02-24 03:10:19,491 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 144 transitions. Word has length 140 [2022-02-24 03:10:19,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:10:19,491 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 144 transitions. [2022-02-24 03:10:19,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 1.1929824561403508) internal successors, (136), 113 states have internal predecessors, (136), 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) [2022-02-24 03:10:19,491 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 144 transitions. [2022-02-24 03:10:19,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-02-24 03:10:19,492 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:10:19,492 INFO L514 BasicCegarLoop]: trace histogram [100, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:10:19,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-02-24 03:10:19,492 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:10:19,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:10:19,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1760569399, now seen corresponding path program 109 times [2022-02-24 03:10:19,492 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:10:19,493 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1004939432] [2022-02-24 03:10:19,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:10:19,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:10:19,811 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:10:19,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:10:19,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:10:19,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:10:19,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:10:25,038 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:10:25,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1004939432] [2022-02-24 03:10:25,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1004939432] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:10:25,038 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:10:25,038 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2022-02-24 03:10:25,038 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626192019] [2022-02-24 03:10:25,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:10:25,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-02-24 03:10:25,039 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:10:25,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-02-24 03:10:25,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=12872, Unknown=0, NotChecked=0, Total=13110 [2022-02-24 03:10:25,040 INFO L87 Difference]: Start difference. First operand 143 states and 144 transitions. Second operand has 115 states, 115 states have (on average 1.191304347826087) internal successors, (137), 114 states have internal predecessors, (137), 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) [2022-02-24 03:10:34,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:10:34,197 INFO L93 Difference]: Finished difference Result 150 states and 151 transitions. [2022-02-24 03:10:34,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-02-24 03:10:34,197 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 1.191304347826087) internal successors, (137), 114 states have internal predecessors, (137), 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 141 [2022-02-24 03:10:34,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:10:34,198 INFO L225 Difference]: With dead ends: 150 [2022-02-24 03:10:34,198 INFO L226 Difference]: Without dead ends: 145 [2022-02-24 03:10:34,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 9 SyntacticMatches, 20 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8503 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=693, Invalid=50157, Unknown=0, NotChecked=0, Total=50850 [2022-02-24 03:10:34,200 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 20 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 15332 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 15467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 15332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:10:34,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 573 Invalid, 15467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 15332 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-02-24 03:10:34,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-02-24 03:10:34,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2022-02-24 03:10:34,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.0142857142857142) internal successors, (142), 140 states have internal predecessors, (142), 3 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) [2022-02-24 03:10:34,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2022-02-24 03:10:34,223 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 141 [2022-02-24 03:10:34,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:10:34,223 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2022-02-24 03:10:34,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 1.191304347826087) internal successors, (137), 114 states have internal predecessors, (137), 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) [2022-02-24 03:10:34,224 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2022-02-24 03:10:34,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-02-24 03:10:34,224 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:10:34,224 INFO L514 BasicCegarLoop]: trace histogram [100, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:10:34,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-02-24 03:10:34,225 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:10:34,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:10:34,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1821904259, now seen corresponding path program 110 times [2022-02-24 03:10:34,225 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:10:34,225 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [568876460] [2022-02-24 03:10:34,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:10:34,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:10:34,591 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:10:34,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:10:34,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:10:34,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:10:34,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:10:39,789 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:10:39,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [568876460] [2022-02-24 03:10:39,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [568876460] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:10:39,789 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:10:39,789 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2022-02-24 03:10:39,789 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317081821] [2022-02-24 03:10:39,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:10:39,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-02-24 03:10:39,789 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:10:39,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-02-24 03:10:39,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=13100, Unknown=0, NotChecked=0, Total=13340 [2022-02-24 03:10:39,790 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand has 116 states, 116 states have (on average 1.206896551724138) internal successors, (140), 115 states have internal predecessors, (140), 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) [2022-02-24 03:10:48,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:10:48,951 INFO L93 Difference]: Finished difference Result 154 states and 157 transitions. [2022-02-24 03:10:48,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-02-24 03:10:48,951 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.206896551724138) internal successors, (140), 115 states have internal predecessors, (140), 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 144 [2022-02-24 03:10:48,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:10:48,951 INFO L225 Difference]: With dead ends: 154 [2022-02-24 03:10:48,951 INFO L226 Difference]: Without dead ends: 146 [2022-02-24 03:10:48,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 12 SyntacticMatches, 20 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8614 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=699, Invalid=51057, Unknown=0, NotChecked=0, Total=51756 [2022-02-24 03:10:48,953 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 20 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 15082 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 15218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 15082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:10:48,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 558 Invalid, 15218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 15082 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-02-24 03:10:48,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-02-24 03:10:48,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2022-02-24 03:10:48,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 141 states have (on average 1.0141843971631206) internal successors, (143), 141 states have internal predecessors, (143), 3 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) [2022-02-24 03:10:48,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 147 transitions. [2022-02-24 03:10:48,969 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 147 transitions. Word has length 144 [2022-02-24 03:10:48,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:10:48,970 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 147 transitions. [2022-02-24 03:10:48,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 1.206896551724138) internal successors, (140), 115 states have internal predecessors, (140), 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) [2022-02-24 03:10:48,970 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 147 transitions. [2022-02-24 03:10:48,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-02-24 03:10:48,970 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:10:48,970 INFO L514 BasicCegarLoop]: trace histogram [101, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:10:48,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-02-24 03:10:48,970 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:10:48,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:10:48,971 INFO L85 PathProgramCache]: Analyzing trace with hash -798309766, now seen corresponding path program 111 times [2022-02-24 03:10:48,971 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:10:48,971 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1763746015] [2022-02-24 03:10:48,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:10:48,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:10:49,338 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:10:49,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:10:49,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:10:49,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:10:49,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:10:54,644 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:10:54,644 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1763746015] [2022-02-24 03:10:54,644 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1763746015] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:10:54,644 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:10:54,644 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2022-02-24 03:10:54,644 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290835878] [2022-02-24 03:10:54,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:10:54,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-02-24 03:10:54,645 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:10:54,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-02-24 03:10:54,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=13330, Unknown=0, NotChecked=0, Total=13572 [2022-02-24 03:10:54,646 INFO L87 Difference]: Start difference. First operand 146 states and 147 transitions. Second operand has 117 states, 117 states have (on average 1.205128205128205) internal successors, (141), 116 states have internal predecessors, (141), 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) [2022-02-24 03:11:03,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:11:03,724 INFO L93 Difference]: Finished difference Result 155 states and 158 transitions. [2022-02-24 03:11:03,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-02-24 03:11:03,725 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 1.205128205128205) internal successors, (141), 116 states have internal predecessors, (141), 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 145 [2022-02-24 03:11:03,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:11:03,725 INFO L225 Difference]: With dead ends: 155 [2022-02-24 03:11:03,725 INFO L226 Difference]: Without dead ends: 147 [2022-02-24 03:11:03,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 12 SyntacticMatches, 20 SemanticMatches, 228 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8748 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=705, Invalid=51965, Unknown=0, NotChecked=0, Total=52670 [2022-02-24 03:11:03,728 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 20 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 14448 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 14585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 14448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:11:03,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 528 Invalid, 14585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 14448 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-02-24 03:11:03,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-02-24 03:11:03,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2022-02-24 03:11:03,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.0140845070422535) internal successors, (144), 142 states have internal predecessors, (144), 3 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) [2022-02-24 03:11:03,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2022-02-24 03:11:03,743 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 145 [2022-02-24 03:11:03,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:11:03,743 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2022-02-24 03:11:03,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 1.205128205128205) internal successors, (141), 116 states have internal predecessors, (141), 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) [2022-02-24 03:11:03,743 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2022-02-24 03:11:03,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-02-24 03:11:03,744 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:11:03,744 INFO L514 BasicCegarLoop]: trace histogram [102, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:11:03,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-02-24 03:11:03,744 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:11:03,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:11:03,744 INFO L85 PathProgramCache]: Analyzing trace with hash -420565917, now seen corresponding path program 112 times [2022-02-24 03:11:03,744 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:11:03,744 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [811091374] [2022-02-24 03:11:03,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:11:03,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:11:04,137 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:11:04,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:11:04,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:11:04,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:11:04,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:11:09,550 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:11:09,550 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [811091374] [2022-02-24 03:11:09,550 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [811091374] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:11:09,550 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:11:09,550 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2022-02-24 03:11:09,550 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455610569] [2022-02-24 03:11:09,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:11:09,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-02-24 03:11:09,551 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:11:09,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-02-24 03:11:09,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=13562, Unknown=0, NotChecked=0, Total=13806 [2022-02-24 03:11:09,552 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand has 118 states, 118 states have (on average 1.2033898305084745) internal successors, (142), 117 states have internal predecessors, (142), 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) [2022-02-24 03:11:19,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:11:19,131 INFO L93 Difference]: Finished difference Result 156 states and 159 transitions. [2022-02-24 03:11:19,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-02-24 03:11:19,131 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 1.2033898305084745) internal successors, (142), 117 states have internal predecessors, (142), 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 146 [2022-02-24 03:11:19,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:11:19,132 INFO L225 Difference]: With dead ends: 156 [2022-02-24 03:11:19,132 INFO L226 Difference]: Without dead ends: 148 [2022-02-24 03:11:19,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 11 SyntacticMatches, 21 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8894 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=711, Invalid=52881, Unknown=0, NotChecked=0, Total=53592 [2022-02-24 03:11:19,134 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 20 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 15834 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 15972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 15834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:11:19,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 578 Invalid, 15972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 15834 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-02-24 03:11:19,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-02-24 03:11:19,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2022-02-24 03:11:19,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 143 states have (on average 1.013986013986014) internal successors, (145), 143 states have internal predecessors, (145), 3 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) [2022-02-24 03:11:19,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 149 transitions. [2022-02-24 03:11:19,153 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 149 transitions. Word has length 146 [2022-02-24 03:11:19,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:11:19,153 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 149 transitions. [2022-02-24 03:11:19,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 1.2033898305084745) internal successors, (142), 117 states have internal predecessors, (142), 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) [2022-02-24 03:11:19,153 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 149 transitions. [2022-02-24 03:11:19,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-02-24 03:11:19,153 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:11:19,153 INFO L514 BasicCegarLoop]: trace histogram [103, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:11:19,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2022-02-24 03:11:19,154 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:11:19,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:11:19,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1595408486, now seen corresponding path program 113 times [2022-02-24 03:11:19,154 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:11:19,154 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1716879140] [2022-02-24 03:11:19,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:11:19,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:11:19,545 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:11:19,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:11:19,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:11:19,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:11:19,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:11:25,086 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:11:25,086 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1716879140] [2022-02-24 03:11:25,086 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1716879140] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:11:25,086 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:11:25,086 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2022-02-24 03:11:25,086 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516724907] [2022-02-24 03:11:25,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:11:25,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-02-24 03:11:25,087 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:11:25,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-02-24 03:11:25,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=13796, Unknown=0, NotChecked=0, Total=14042 [2022-02-24 03:11:25,088 INFO L87 Difference]: Start difference. First operand 148 states and 149 transitions. Second operand has 119 states, 119 states have (on average 1.2016806722689075) internal successors, (143), 118 states have internal predecessors, (143), 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) [2022-02-24 03:11:34,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:11:34,733 INFO L93 Difference]: Finished difference Result 157 states and 160 transitions. [2022-02-24 03:11:34,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-02-24 03:11:34,734 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 1.2016806722689075) internal successors, (143), 118 states have internal predecessors, (143), 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 147 [2022-02-24 03:11:34,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:11:34,734 INFO L225 Difference]: With dead ends: 157 [2022-02-24 03:11:34,734 INFO L226 Difference]: Without dead ends: 149 [2022-02-24 03:11:34,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 12 SyntacticMatches, 20 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9041 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=717, Invalid=53805, Unknown=0, NotChecked=0, Total=54522 [2022-02-24 03:11:34,737 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 20 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 15832 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 15971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 15832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:11:34,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 573 Invalid, 15971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 15832 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-02-24 03:11:34,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-02-24 03:11:34,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2022-02-24 03:11:34,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 144 states have (on average 1.0138888888888888) internal successors, (146), 144 states have internal predecessors, (146), 3 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) [2022-02-24 03:11:34,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2022-02-24 03:11:34,753 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 147 [2022-02-24 03:11:34,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:11:34,753 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2022-02-24 03:11:34,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 1.2016806722689075) internal successors, (143), 118 states have internal predecessors, (143), 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) [2022-02-24 03:11:34,753 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2022-02-24 03:11:34,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-02-24 03:11:34,753 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:11:34,753 INFO L514 BasicCegarLoop]: trace histogram [104, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:11:34,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-02-24 03:11:34,754 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:11:34,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:11:34,754 INFO L85 PathProgramCache]: Analyzing trace with hash 639177539, now seen corresponding path program 114 times [2022-02-24 03:11:34,754 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:11:34,754 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [859119114] [2022-02-24 03:11:34,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:11:34,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:11:35,149 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:11:35,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:11:35,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:11:35,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:11:35,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:11:40,730 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:11:40,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [859119114] [2022-02-24 03:11:40,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [859119114] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:11:40,730 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:11:40,730 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2022-02-24 03:11:40,730 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622667382] [2022-02-24 03:11:40,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:11:40,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-02-24 03:11:40,731 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:11:40,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-02-24 03:11:40,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=14032, Unknown=0, NotChecked=0, Total=14280 [2022-02-24 03:11:40,732 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand has 120 states, 120 states have (on average 1.2) internal successors, (144), 119 states have internal predecessors, (144), 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) [2022-02-24 03:11:50,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:11:50,617 INFO L93 Difference]: Finished difference Result 158 states and 161 transitions. [2022-02-24 03:11:50,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-02-24 03:11:50,617 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 1.2) internal successors, (144), 119 states have internal predecessors, (144), 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 148 [2022-02-24 03:11:50,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:11:50,618 INFO L225 Difference]: With dead ends: 158 [2022-02-24 03:11:50,618 INFO L226 Difference]: Without dead ends: 150 [2022-02-24 03:11:50,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 12 SyntacticMatches, 20 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9156 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=723, Invalid=54737, Unknown=0, NotChecked=0, Total=55460 [2022-02-24 03:11:50,620 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 20 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 16344 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 16484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 16344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-02-24 03:11:50,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 588 Invalid, 16484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 16344 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-02-24 03:11:50,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-02-24 03:11:50,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2022-02-24 03:11:50,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 145 states have (on average 1.013793103448276) internal successors, (147), 145 states have internal predecessors, (147), 3 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) [2022-02-24 03:11:50,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 151 transitions. [2022-02-24 03:11:50,636 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 151 transitions. Word has length 148 [2022-02-24 03:11:50,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:11:50,637 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 151 transitions. [2022-02-24 03:11:50,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 1.2) internal successors, (144), 119 states have internal predecessors, (144), 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) [2022-02-24 03:11:50,637 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 151 transitions. [2022-02-24 03:11:50,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-02-24 03:11:50,637 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:11:50,637 INFO L514 BasicCegarLoop]: trace histogram [105, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:11:50,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-02-24 03:11:50,637 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:11:50,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:11:50,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1191867578, now seen corresponding path program 115 times [2022-02-24 03:11:50,638 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:11:50,638 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2113853463] [2022-02-24 03:11:50,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:11:50,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:11:51,088 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:11:51,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:11:51,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:11:51,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:11:51,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.