/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/array-examples/standard_init7_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 17:44:11,970 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 17:44:11,971 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 17:44:12,002 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 17:44:12,020 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 17:44:12,021 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 17:44:12,021 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 17:44:12,022 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 17:44:12,022 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 17:44:12,023 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 17:44:12,024 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 17:44:12,025 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 17:44:12,025 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 17:44:12,027 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 17:44:12,030 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 17:44:12,031 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 17:44:12,039 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 17:44:12,052 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 17:44:12,053 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 17:44:12,053 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 17:44:12,054 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-01-31 17:44:12,063 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 17:44:12,063 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 17:44:12,065 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 17:44:12,065 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 17:44:12,065 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 17:44:12,065 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 17:44:12,065 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 17:44:12,065 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 17:44:12,065 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 17:44:12,065 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 17:44:12,066 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 17:44:12,066 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 17:44:12,066 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 17:44:12,066 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 17:44:12,066 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 17:44:12,066 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 17:44:12,066 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 17:44:12,066 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 17:44:12,066 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 17:44:12,067 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 17:44:12,067 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 17:44:12,067 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 17:44:12,067 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 17:44:12,067 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 17:44:12,249 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 17:44:12,267 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 17:44:12,269 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 17:44:12,270 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 17:44:12,270 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 17:44:12,271 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init7_ground-2.i [2022-01-31 17:44:12,328 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0624f7dec/e551506f8950432887b68d5da71e0175/FLAG0c868056f [2022-01-31 17:44:12,707 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 17:44:12,707 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init7_ground-2.i [2022-01-31 17:44:12,711 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0624f7dec/e551506f8950432887b68d5da71e0175/FLAG0c868056f [2022-01-31 17:44:13,139 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0624f7dec/e551506f8950432887b68d5da71e0175 [2022-01-31 17:44:13,140 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 17:44:13,147 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 17:44:13,149 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 17:44:13,150 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 17:44:13,152 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 17:44:13,152 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:44:13" (1/1) ... [2022-01-31 17:44:13,153 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29a0ec00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:44:13, skipping insertion in model container [2022-01-31 17:44:13,153 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:44:13" (1/1) ... [2022-01-31 17:44:13,158 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 17:44:13,168 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 17:44:13,285 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init7_ground-2.i[816,829] [2022-01-31 17:44:13,315 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 17:44:13,320 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 17:44:13,329 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init7_ground-2.i[816,829] [2022-01-31 17:44:13,348 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 17:44:13,356 INFO L208 MainTranslator]: Completed translation [2022-01-31 17:44:13,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:44:13 WrapperNode [2022-01-31 17:44:13,356 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 17:44:13,357 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 17:44:13,357 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 17:44:13,357 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 17:44:13,366 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:44:13" (1/1) ... [2022-01-31 17:44:13,366 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:44:13" (1/1) ... [2022-01-31 17:44:13,376 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:44:13" (1/1) ... [2022-01-31 17:44:13,376 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:44:13" (1/1) ... [2022-01-31 17:44:13,386 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:44:13" (1/1) ... [2022-01-31 17:44:13,392 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:44:13" (1/1) ... [2022-01-31 17:44:13,395 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:44:13" (1/1) ... [2022-01-31 17:44:13,396 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 17:44:13,397 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 17:44:13,397 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 17:44:13,397 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 17:44:13,399 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:44:13" (1/1) ... [2022-01-31 17:44:13,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 17:44:13,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 17:44:13,448 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 17:44:13,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 17:44:13,484 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 17:44:13,484 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 17:44:13,484 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 17:44:13,484 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 17:44:13,485 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 17:44:13,485 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 17:44:13,485 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 17:44:13,485 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 17:44:13,485 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 17:44:13,486 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 17:44:13,486 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 17:44:13,486 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 17:44:13,486 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 17:44:13,486 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 17:44:13,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 17:44:13,487 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 17:44:13,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 17:44:13,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 17:44:13,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 17:44:13,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 17:44:13,545 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 17:44:13,546 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 17:44:13,674 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 17:44:13,678 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 17:44:13,678 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2022-01-31 17:44:13,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:44:13 BoogieIcfgContainer [2022-01-31 17:44:13,679 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 17:44:13,680 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 17:44:13,680 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 17:44:13,696 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 17:44:13,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 05:44:13" (1/3) ... [2022-01-31 17:44:13,697 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c6e455 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:44:13, skipping insertion in model container [2022-01-31 17:44:13,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:44:13" (2/3) ... [2022-01-31 17:44:13,697 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c6e455 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:44:13, skipping insertion in model container [2022-01-31 17:44:13,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:44:13" (3/3) ... [2022-01-31 17:44:13,698 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init7_ground-2.i [2022-01-31 17:44:13,701 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 17:44:13,701 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 17:44:13,735 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 17:44:13,739 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=JORDAN [2022-01-31 17:44:13,739 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 17:44:13,747 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 28 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:44:13,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 17:44:13,752 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:13,752 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:13,753 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:13,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:13,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1657178685, now seen corresponding path program 1 times [2022-01-31 17:44:13,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:13,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1736638594] [2022-01-31 17:44:13,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:13,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:13,809 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:13,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:13,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:13,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:13,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:13,929 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:13,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1736638594] [2022-01-31 17:44:13,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1736638594] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:13,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:13,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 17:44:13,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165671386] [2022-01-31 17:44:13,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:13,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 17:44:13,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:13,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 17:44:13,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 17:44:13,958 INFO L87 Difference]: Start difference. First operand has 35 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 28 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:14,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:14,005 INFO L93 Difference]: Finished difference Result 63 states and 94 transitions. [2022-01-31 17:44:14,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 17:44:14,006 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-01-31 17:44:14,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:14,013 INFO L225 Difference]: With dead ends: 63 [2022-01-31 17:44:14,013 INFO L226 Difference]: Without dead ends: 30 [2022-01-31 17:44:14,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 17:44:14,018 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 33 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:14,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 44 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:44:14,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-31 17:44:14,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-01-31 17:44:14,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:14,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-01-31 17:44:14,045 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 25 [2022-01-31 17:44:14,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:14,045 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-01-31 17:44:14,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:14,045 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-01-31 17:44:14,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 17:44:14,046 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:14,047 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:14,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 17:44:14,047 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:14,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:14,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1105544631, now seen corresponding path program 1 times [2022-01-31 17:44:14,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:14,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [985428546] [2022-01-31 17:44:14,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:14,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:14,053 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:14,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:14,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:14,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:14,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:14,123 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:14,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [985428546] [2022-01-31 17:44:14,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [985428546] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:14,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:14,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 17:44:14,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643324255] [2022-01-31 17:44:14,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:14,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 17:44:14,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:14,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 17:44:14,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 17:44:14,126 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:14,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:14,217 INFO L93 Difference]: Finished difference Result 60 states and 80 transitions. [2022-01-31 17:44:14,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 17:44:14,218 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-01-31 17:44:14,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:14,218 INFO L225 Difference]: With dead ends: 60 [2022-01-31 17:44:14,219 INFO L226 Difference]: Without dead ends: 37 [2022-01-31 17:44:14,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 17:44:14,220 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:14,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 36 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:44:14,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-31 17:44:14,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-01-31 17:44:14,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:14,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2022-01-31 17:44:14,228 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 25 [2022-01-31 17:44:14,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:14,229 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2022-01-31 17:44:14,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:14,229 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2022-01-31 17:44:14,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 17:44:14,229 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:14,230 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:14,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 17:44:14,230 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:14,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:14,230 INFO L85 PathProgramCache]: Analyzing trace with hash -2139881244, now seen corresponding path program 1 times [2022-01-31 17:44:14,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:14,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1851019730] [2022-01-31 17:44:14,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:14,242 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:14,242 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:14,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:14,244 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:14,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:14,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:14,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:14,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:14,283 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:14,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1851019730] [2022-01-31 17:44:14,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1851019730] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:14,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:14,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 17:44:14,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281256227] [2022-01-31 17:44:14,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:14,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 17:44:14,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:14,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 17:44:14,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 17:44:14,284 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 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) [2022-01-31 17:44:14,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:14,364 INFO L93 Difference]: Finished difference Result 73 states and 93 transitions. [2022-01-31 17:44:14,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 17:44:14,364 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 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 [2022-01-31 17:44:14,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:14,365 INFO L225 Difference]: With dead ends: 73 [2022-01-31 17:44:14,365 INFO L226 Difference]: Without dead ends: 44 [2022-01-31 17:44:14,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 17:44:14,366 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:14,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:44:14,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-01-31 17:44:14,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-01-31 17:44:14,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 38 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:14,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2022-01-31 17:44:14,372 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 32 [2022-01-31 17:44:14,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:14,372 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2022-01-31 17:44:14,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 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) [2022-01-31 17:44:14,373 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2022-01-31 17:44:14,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 17:44:14,373 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:14,373 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:14,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 17:44:14,374 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:14,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:14,374 INFO L85 PathProgramCache]: Analyzing trace with hash 2062031127, now seen corresponding path program 2 times [2022-01-31 17:44:14,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:14,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [211779465] [2022-01-31 17:44:14,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:14,376 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:14,376 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:14,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:14,377 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:14,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:14,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:14,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:14,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:14,446 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:14,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [211779465] [2022-01-31 17:44:14,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [211779465] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:14,446 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:14,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 17:44:14,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658331084] [2022-01-31 17:44:14,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:14,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 17:44:14,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:14,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 17:44:14,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 17:44:14,450 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:14,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:14,592 INFO L93 Difference]: Finished difference Result 86 states and 106 transitions. [2022-01-31 17:44:14,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 17:44:14,592 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 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 39 [2022-01-31 17:44:14,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:14,593 INFO L225 Difference]: With dead ends: 86 [2022-01-31 17:44:14,593 INFO L226 Difference]: Without dead ends: 51 [2022-01-31 17:44:14,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 17:44:14,594 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:14,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 36 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:44:14,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-01-31 17:44:14,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-01-31 17:44:14,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 45 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:14,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2022-01-31 17:44:14,601 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 39 [2022-01-31 17:44:14,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:14,601 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2022-01-31 17:44:14,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:14,601 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2022-01-31 17:44:14,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 17:44:14,602 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:14,602 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:14,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 17:44:14,602 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:14,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:14,602 INFO L85 PathProgramCache]: Analyzing trace with hash 749944452, now seen corresponding path program 3 times [2022-01-31 17:44:14,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:14,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [774775559] [2022-01-31 17:44:14,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:14,604 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:14,604 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:14,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:14,605 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:14,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:14,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:14,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:14,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:14,668 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:14,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [774775559] [2022-01-31 17:44:14,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [774775559] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:14,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:14,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 17:44:14,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418949460] [2022-01-31 17:44:14,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:14,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 17:44:14,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:14,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 17:44:14,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 17:44:14,670 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 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) [2022-01-31 17:44:14,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:14,778 INFO L93 Difference]: Finished difference Result 99 states and 119 transitions. [2022-01-31 17:44:14,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 17:44:14,779 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 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 46 [2022-01-31 17:44:14,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:14,779 INFO L225 Difference]: With dead ends: 99 [2022-01-31 17:44:14,779 INFO L226 Difference]: Without dead ends: 58 [2022-01-31 17:44:14,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-01-31 17:44:14,781 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:14,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 46 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:44:14,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-01-31 17:44:14,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-01-31 17:44:14,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 52 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:14,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2022-01-31 17:44:14,788 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 46 [2022-01-31 17:44:14,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:14,788 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2022-01-31 17:44:14,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 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) [2022-01-31 17:44:14,788 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2022-01-31 17:44:14,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-31 17:44:14,789 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:14,789 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:14,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 17:44:14,789 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:14,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:14,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1106232439, now seen corresponding path program 4 times [2022-01-31 17:44:14,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:14,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1000746220] [2022-01-31 17:44:14,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:14,791 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:14,791 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:14,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:14,792 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:14,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:14,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:14,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:14,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:14,869 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:14,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1000746220] [2022-01-31 17:44:14,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1000746220] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:14,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:14,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 17:44:14,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532837588] [2022-01-31 17:44:14,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:14,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 17:44:14,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:14,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 17:44:14,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 17:44:14,870 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:15,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:15,033 INFO L93 Difference]: Finished difference Result 112 states and 132 transitions. [2022-01-31 17:44:15,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 17:44:15,034 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-01-31 17:44:15,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:15,034 INFO L225 Difference]: With dead ends: 112 [2022-01-31 17:44:15,034 INFO L226 Difference]: Without dead ends: 65 [2022-01-31 17:44:15,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-01-31 17:44:15,039 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:15,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:44:15,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-01-31 17:44:15,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-01-31 17:44:15,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 59 states have (on average 1.1355932203389831) internal successors, (67), 59 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:15,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2022-01-31 17:44:15,051 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 53 [2022-01-31 17:44:15,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:15,052 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2022-01-31 17:44:15,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:15,052 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2022-01-31 17:44:15,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 17:44:15,052 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:15,052 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:15,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 17:44:15,053 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:15,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:15,053 INFO L85 PathProgramCache]: Analyzing trace with hash 757212196, now seen corresponding path program 5 times [2022-01-31 17:44:15,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:15,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1543407407] [2022-01-31 17:44:15,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:15,055 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:15,055 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:15,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:15,059 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:15,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:15,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:15,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:15,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:15,208 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:15,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1543407407] [2022-01-31 17:44:15,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1543407407] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:15,208 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:15,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 17:44:15,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359222908] [2022-01-31 17:44:15,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:15,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 17:44:15,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:15,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 17:44:15,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 17:44:15,209 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:15,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:15,355 INFO L93 Difference]: Finished difference Result 125 states and 145 transitions. [2022-01-31 17:44:15,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 17:44:15,356 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 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 60 [2022-01-31 17:44:15,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:15,356 INFO L225 Difference]: With dead ends: 125 [2022-01-31 17:44:15,356 INFO L226 Difference]: Without dead ends: 72 [2022-01-31 17:44:15,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2022-01-31 17:44:15,357 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:15,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 51 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:44:15,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-01-31 17:44:15,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-01-31 17:44:15,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 66 states have (on average 1.121212121212121) internal successors, (74), 66 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:15,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2022-01-31 17:44:15,364 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 60 [2022-01-31 17:44:15,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:15,364 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2022-01-31 17:44:15,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:15,364 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2022-01-31 17:44:15,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-31 17:44:15,365 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:15,365 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:15,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 17:44:15,365 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:15,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:15,366 INFO L85 PathProgramCache]: Analyzing trace with hash -2077603881, now seen corresponding path program 6 times [2022-01-31 17:44:15,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:15,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981190346] [2022-01-31 17:44:15,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:15,367 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:15,367 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:15,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:15,368 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:15,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:15,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:15,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:15,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:15,469 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:15,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981190346] [2022-01-31 17:44:15,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1981190346] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:15,473 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:15,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 17:44:15,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568768301] [2022-01-31 17:44:15,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:15,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 17:44:15,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:15,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 17:44:15,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-01-31 17:44:15,475 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2022-01-31 17:44:15,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:15,648 INFO L93 Difference]: Finished difference Result 138 states and 158 transitions. [2022-01-31 17:44:15,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 17:44:15,648 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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 67 [2022-01-31 17:44:15,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:15,649 INFO L225 Difference]: With dead ends: 138 [2022-01-31 17:44:15,649 INFO L226 Difference]: Without dead ends: 79 [2022-01-31 17:44:15,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2022-01-31 17:44:15,650 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:15,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 51 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:44:15,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-01-31 17:44:15,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-01-31 17:44:15,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 73 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:15,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 86 transitions. [2022-01-31 17:44:15,656 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 86 transitions. Word has length 67 [2022-01-31 17:44:15,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:15,657 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 86 transitions. [2022-01-31 17:44:15,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2022-01-31 17:44:15,657 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 86 transitions. [2022-01-31 17:44:15,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 17:44:15,658 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:15,658 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:15,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 17:44:15,658 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:15,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:15,658 INFO L85 PathProgramCache]: Analyzing trace with hash 726839748, now seen corresponding path program 7 times [2022-01-31 17:44:15,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:15,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [500029620] [2022-01-31 17:44:15,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:15,660 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:15,660 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:15,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:15,661 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:15,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:15,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:15,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:15,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:15,789 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:15,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [500029620] [2022-01-31 17:44:15,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [500029620] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:15,789 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:15,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 17:44:15,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116129633] [2022-01-31 17:44:15,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:15,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 17:44:15,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:15,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 17:44:15,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-01-31 17:44:15,791 INFO L87 Difference]: Start difference. First operand 79 states and 86 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:15,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:15,985 INFO L93 Difference]: Finished difference Result 151 states and 171 transitions. [2022-01-31 17:44:15,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 17:44:15,985 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 2 states have call successors, (3), 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 [2022-01-31 17:44:15,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:15,987 INFO L225 Difference]: With dead ends: 151 [2022-01-31 17:44:15,987 INFO L226 Difference]: Without dead ends: 86 [2022-01-31 17:44:15,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2022-01-31 17:44:15,989 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:15,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 51 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:44:15,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-01-31 17:44:16,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-01-31 17:44:16,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:16,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2022-01-31 17:44:16,012 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 74 [2022-01-31 17:44:16,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:16,013 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2022-01-31 17:44:16,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:16,014 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2022-01-31 17:44:16,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-31 17:44:16,015 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:16,015 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:16,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 17:44:16,015 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:16,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:16,015 INFO L85 PathProgramCache]: Analyzing trace with hash 272999223, now seen corresponding path program 8 times [2022-01-31 17:44:16,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:16,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1063924319] [2022-01-31 17:44:16,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:16,017 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:16,017 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:16,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:16,019 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:16,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:16,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:16,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:16,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:16,152 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:16,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1063924319] [2022-01-31 17:44:16,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1063924319] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:16,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:16,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 17:44:16,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044949703] [2022-01-31 17:44:16,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:16,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 17:44:16,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:16,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 17:44:16,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-01-31 17:44:16,154 INFO L87 Difference]: Start difference. First operand 86 states and 93 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:16,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:16,376 INFO L93 Difference]: Finished difference Result 164 states and 184 transitions. [2022-01-31 17:44:16,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 17:44:16,376 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2022-01-31 17:44:16,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:16,377 INFO L225 Difference]: With dead ends: 164 [2022-01-31 17:44:16,377 INFO L226 Difference]: Without dead ends: 93 [2022-01-31 17:44:16,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2022-01-31 17:44:16,378 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:16,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 46 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:44:16,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-01-31 17:44:16,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-01-31 17:44:16,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 87 states have (on average 1.0919540229885059) internal successors, (95), 87 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:16,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 100 transitions. [2022-01-31 17:44:16,384 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 100 transitions. Word has length 81 [2022-01-31 17:44:16,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:16,384 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 100 transitions. [2022-01-31 17:44:16,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:16,384 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 100 transitions. [2022-01-31 17:44:16,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-01-31 17:44:16,385 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:16,385 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:16,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 17:44:16,385 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:16,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:16,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1621694620, now seen corresponding path program 9 times [2022-01-31 17:44:16,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:16,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [592569758] [2022-01-31 17:44:16,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:16,388 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:16,388 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:16,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:16,389 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:16,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:16,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:16,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:16,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:16,514 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:16,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [592569758] [2022-01-31 17:44:16,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [592569758] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:16,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:16,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 17:44:16,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547309254] [2022-01-31 17:44:16,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:16,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 17:44:16,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:16,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 17:44:16,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-01-31 17:44:16,516 INFO L87 Difference]: Start difference. First operand 93 states and 100 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:16,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:16,729 INFO L93 Difference]: Finished difference Result 177 states and 197 transitions. [2022-01-31 17:44:16,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 17:44:16,729 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 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 88 [2022-01-31 17:44:16,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:16,730 INFO L225 Difference]: With dead ends: 177 [2022-01-31 17:44:16,730 INFO L226 Difference]: Without dead ends: 100 [2022-01-31 17:44:16,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2022-01-31 17:44:16,732 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:16,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 51 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:44:16,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-01-31 17:44:16,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-01-31 17:44:16,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 94 states have (on average 1.0851063829787233) internal successors, (102), 94 states have internal predecessors, (102), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:16,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 107 transitions. [2022-01-31 17:44:16,745 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 107 transitions. Word has length 88 [2022-01-31 17:44:16,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:16,745 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 107 transitions. [2022-01-31 17:44:16,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:16,745 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 107 transitions. [2022-01-31 17:44:16,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 17:44:16,746 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:16,746 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:16,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 17:44:16,747 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:16,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:16,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1987040919, now seen corresponding path program 10 times [2022-01-31 17:44:16,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:16,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [402941505] [2022-01-31 17:44:16,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:16,748 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:16,748 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:16,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:16,750 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:16,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:16,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:16,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:16,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:16,877 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:16,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [402941505] [2022-01-31 17:44:16,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [402941505] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:16,877 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:16,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 17:44:16,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312645299] [2022-01-31 17:44:16,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:16,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 17:44:16,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:16,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 17:44:16,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 17:44:16,878 INFO L87 Difference]: Start difference. First operand 100 states and 107 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:17,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:17,055 INFO L93 Difference]: Finished difference Result 190 states and 210 transitions. [2022-01-31 17:44:17,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 17:44:17,055 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 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 95 [2022-01-31 17:44:17,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:17,056 INFO L225 Difference]: With dead ends: 190 [2022-01-31 17:44:17,056 INFO L226 Difference]: Without dead ends: 107 [2022-01-31 17:44:17,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2022-01-31 17:44:17,057 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:17,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 51 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:44:17,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-01-31 17:44:17,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2022-01-31 17:44:17,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 101 states have (on average 1.0792079207920793) internal successors, (109), 101 states have internal predecessors, (109), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:17,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 114 transitions. [2022-01-31 17:44:17,061 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 114 transitions. Word has length 95 [2022-01-31 17:44:17,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:17,061 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 114 transitions. [2022-01-31 17:44:17,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:17,061 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 114 transitions. [2022-01-31 17:44:17,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 17:44:17,062 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:17,062 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:17,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 17:44:17,062 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:17,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:17,062 INFO L85 PathProgramCache]: Analyzing trace with hash -272579324, now seen corresponding path program 11 times [2022-01-31 17:44:17,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:17,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [490244778] [2022-01-31 17:44:17,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:17,064 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:17,064 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:17,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:17,066 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:17,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:17,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:17,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:17,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:17,206 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:17,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [490244778] [2022-01-31 17:44:17,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [490244778] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:17,206 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:17,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 17:44:17,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307765283] [2022-01-31 17:44:17,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:17,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 17:44:17,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:17,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 17:44:17,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2022-01-31 17:44:17,207 INFO L87 Difference]: Start difference. First operand 107 states and 114 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:17,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:17,448 INFO L93 Difference]: Finished difference Result 203 states and 223 transitions. [2022-01-31 17:44:17,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 17:44:17,448 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 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 102 [2022-01-31 17:44:17,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:17,449 INFO L225 Difference]: With dead ends: 203 [2022-01-31 17:44:17,449 INFO L226 Difference]: Without dead ends: 114 [2022-01-31 17:44:17,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2022-01-31 17:44:17,450 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:17,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 56 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:44:17,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-01-31 17:44:17,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2022-01-31 17:44:17,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 108 states have (on average 1.0740740740740742) internal successors, (116), 108 states have internal predecessors, (116), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:17,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 121 transitions. [2022-01-31 17:44:17,455 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 121 transitions. Word has length 102 [2022-01-31 17:44:17,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:17,455 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 121 transitions. [2022-01-31 17:44:17,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:17,455 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 121 transitions. [2022-01-31 17:44:17,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-01-31 17:44:17,457 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:17,458 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:17,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 17:44:17,458 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:17,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:17,458 INFO L85 PathProgramCache]: Analyzing trace with hash -396959241, now seen corresponding path program 12 times [2022-01-31 17:44:17,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:17,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [861287315] [2022-01-31 17:44:17,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:17,459 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:17,459 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:17,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:17,461 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:17,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:17,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:17,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:17,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:17,600 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:17,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [861287315] [2022-01-31 17:44:17,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [861287315] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:17,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:17,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 17:44:17,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296331582] [2022-01-31 17:44:17,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:17,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 17:44:17,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:17,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 17:44:17,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-01-31 17:44:17,601 INFO L87 Difference]: Start difference. First operand 114 states and 121 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 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) [2022-01-31 17:44:17,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:17,840 INFO L93 Difference]: Finished difference Result 216 states and 236 transitions. [2022-01-31 17:44:17,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 17:44:17,841 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 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 109 [2022-01-31 17:44:17,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:17,841 INFO L225 Difference]: With dead ends: 216 [2022-01-31 17:44:17,841 INFO L226 Difference]: Without dead ends: 121 [2022-01-31 17:44:17,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2022-01-31 17:44:17,842 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 355 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 355 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:17,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 36 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [355 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:44:17,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-01-31 17:44:17,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-01-31 17:44:17,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 115 states have (on average 1.0695652173913044) internal successors, (123), 115 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:17,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 128 transitions. [2022-01-31 17:44:17,846 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 128 transitions. Word has length 109 [2022-01-31 17:44:17,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:17,846 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 128 transitions. [2022-01-31 17:44:17,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 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) [2022-01-31 17:44:17,846 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 128 transitions. [2022-01-31 17:44:17,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-01-31 17:44:17,847 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:17,847 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:17,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 17:44:17,847 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:17,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:17,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1851635036, now seen corresponding path program 13 times [2022-01-31 17:44:17,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:17,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1530273919] [2022-01-31 17:44:17,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:17,849 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:17,849 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:17,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:17,850 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:17,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:18,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:18,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:18,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:18,063 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:18,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1530273919] [2022-01-31 17:44:18,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1530273919] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:18,063 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:18,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 17:44:18,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784796275] [2022-01-31 17:44:18,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:18,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 17:44:18,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:18,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 17:44:18,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2022-01-31 17:44:18,064 INFO L87 Difference]: Start difference. First operand 121 states and 128 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:18,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:18,353 INFO L93 Difference]: Finished difference Result 229 states and 249 transitions. [2022-01-31 17:44:18,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 17:44:18,354 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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 116 [2022-01-31 17:44:18,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:18,354 INFO L225 Difference]: With dead ends: 229 [2022-01-31 17:44:18,354 INFO L226 Difference]: Without dead ends: 128 [2022-01-31 17:44:18,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2022-01-31 17:44:18,355 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:18,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 51 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:44:18,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-01-31 17:44:18,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2022-01-31 17:44:18,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 122 states have (on average 1.0655737704918034) internal successors, (130), 122 states have internal predecessors, (130), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:18,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 135 transitions. [2022-01-31 17:44:18,360 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 135 transitions. Word has length 116 [2022-01-31 17:44:18,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:18,360 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 135 transitions. [2022-01-31 17:44:18,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:18,360 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 135 transitions. [2022-01-31 17:44:18,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-01-31 17:44:18,361 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:18,361 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:18,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 17:44:18,361 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:18,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:18,361 INFO L85 PathProgramCache]: Analyzing trace with hash 422102359, now seen corresponding path program 14 times [2022-01-31 17:44:18,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:18,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1525811081] [2022-01-31 17:44:18,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:18,362 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:18,362 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:18,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:18,366 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:18,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:18,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:18,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:18,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:18,578 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:18,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1525811081] [2022-01-31 17:44:18,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1525811081] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:18,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:18,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 17:44:18,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802417670] [2022-01-31 17:44:18,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:18,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 17:44:18,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:18,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 17:44:18,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-01-31 17:44:18,579 INFO L87 Difference]: Start difference. First operand 128 states and 135 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:18,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:18,908 INFO L93 Difference]: Finished difference Result 242 states and 262 transitions. [2022-01-31 17:44:18,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 17:44:18,909 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 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 123 [2022-01-31 17:44:18,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:18,909 INFO L225 Difference]: With dead ends: 242 [2022-01-31 17:44:18,909 INFO L226 Difference]: Without dead ends: 135 [2022-01-31 17:44:18,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 17:44:18,910 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:18,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 51 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:44:18,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-01-31 17:44:18,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2022-01-31 17:44:18,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 129 states have (on average 1.062015503875969) internal successors, (137), 129 states have internal predecessors, (137), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:18,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 142 transitions. [2022-01-31 17:44:18,915 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 142 transitions. Word has length 123 [2022-01-31 17:44:18,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:18,915 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 142 transitions. [2022-01-31 17:44:18,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:18,915 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 142 transitions. [2022-01-31 17:44:18,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-01-31 17:44:18,916 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:18,916 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:18,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 17:44:18,916 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:18,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:18,916 INFO L85 PathProgramCache]: Analyzing trace with hash 680360004, now seen corresponding path program 15 times [2022-01-31 17:44:18,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:18,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [414338418] [2022-01-31 17:44:18,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:18,917 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:18,918 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:18,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:18,919 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:18,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:19,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:19,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:19,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:19,127 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:19,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [414338418] [2022-01-31 17:44:19,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [414338418] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:19,127 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:19,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 17:44:19,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262968747] [2022-01-31 17:44:19,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:19,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 17:44:19,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:19,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 17:44:19,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2022-01-31 17:44:19,128 INFO L87 Difference]: Start difference. First operand 135 states and 142 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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) [2022-01-31 17:44:19,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:19,478 INFO L93 Difference]: Finished difference Result 255 states and 275 transitions. [2022-01-31 17:44:19,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 17:44:19,479 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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 130 [2022-01-31 17:44:19,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:19,479 INFO L225 Difference]: With dead ends: 255 [2022-01-31 17:44:19,479 INFO L226 Difference]: Without dead ends: 142 [2022-01-31 17:44:19,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 17:44:19,480 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 319 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 319 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:19,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 56 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [319 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:44:19,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-01-31 17:44:19,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2022-01-31 17:44:19,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 136 states have (on average 1.0588235294117647) internal successors, (144), 136 states have internal predecessors, (144), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:19,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 149 transitions. [2022-01-31 17:44:19,485 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 149 transitions. Word has length 130 [2022-01-31 17:44:19,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:19,485 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 149 transitions. [2022-01-31 17:44:19,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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) [2022-01-31 17:44:19,486 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 149 transitions. [2022-01-31 17:44:19,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-01-31 17:44:19,486 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:19,486 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:19,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 17:44:19,486 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:19,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:19,487 INFO L85 PathProgramCache]: Analyzing trace with hash 496206007, now seen corresponding path program 16 times [2022-01-31 17:44:19,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:19,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1672037783] [2022-01-31 17:44:19,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:19,488 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:19,488 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:19,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:19,490 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:19,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:19,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:19,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:19,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:19,662 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:19,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1672037783] [2022-01-31 17:44:19,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1672037783] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:19,662 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:19,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 17:44:19,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605580204] [2022-01-31 17:44:19,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:19,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 17:44:19,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:19,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 17:44:19,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-01-31 17:44:19,663 INFO L87 Difference]: Start difference. First operand 142 states and 149 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:20,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:20,016 INFO L93 Difference]: Finished difference Result 268 states and 288 transitions. [2022-01-31 17:44:20,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 17:44:20,016 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 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 137 [2022-01-31 17:44:20,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:20,017 INFO L225 Difference]: With dead ends: 268 [2022-01-31 17:44:20,017 INFO L226 Difference]: Without dead ends: 149 [2022-01-31 17:44:20,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 17:44:20,019 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 352 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 352 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:20,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 61 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [352 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:44:20,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-01-31 17:44:20,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2022-01-31 17:44:20,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 143 states have (on average 1.055944055944056) internal successors, (151), 143 states have internal predecessors, (151), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:20,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 156 transitions. [2022-01-31 17:44:20,025 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 156 transitions. Word has length 137 [2022-01-31 17:44:20,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:20,025 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 156 transitions. [2022-01-31 17:44:20,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:20,025 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 156 transitions. [2022-01-31 17:44:20,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-01-31 17:44:20,026 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:20,026 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:20,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 17:44:20,027 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:20,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:20,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1500230172, now seen corresponding path program 17 times [2022-01-31 17:44:20,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:20,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [304715247] [2022-01-31 17:44:20,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:20,028 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:20,028 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:20,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:20,031 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:20,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:20,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:20,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:20,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:20,243 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:20,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [304715247] [2022-01-31 17:44:20,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [304715247] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:20,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:20,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 17:44:20,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509331557] [2022-01-31 17:44:20,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:20,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 17:44:20,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:20,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 17:44:20,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2022-01-31 17:44:20,245 INFO L87 Difference]: Start difference. First operand 149 states and 156 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:20,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:20,681 INFO L93 Difference]: Finished difference Result 281 states and 301 transitions. [2022-01-31 17:44:20,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 17:44:20,682 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 144 [2022-01-31 17:44:20,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:20,682 INFO L225 Difference]: With dead ends: 281 [2022-01-31 17:44:20,682 INFO L226 Difference]: Without dead ends: 156 [2022-01-31 17:44:20,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 17:44:20,684 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 511 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 511 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:20,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [511 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:44:20,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-01-31 17:44:20,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2022-01-31 17:44:20,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 150 states have (on average 1.0533333333333332) internal successors, (158), 150 states have internal predecessors, (158), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:20,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 163 transitions. [2022-01-31 17:44:20,690 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 163 transitions. Word has length 144 [2022-01-31 17:44:20,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:20,690 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 163 transitions. [2022-01-31 17:44:20,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:20,690 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 163 transitions. [2022-01-31 17:44:20,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-01-31 17:44:20,691 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:20,691 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:20,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 17:44:20,691 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:20,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:20,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1271206935, now seen corresponding path program 18 times [2022-01-31 17:44:20,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:20,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2065297244] [2022-01-31 17:44:20,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:20,693 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:20,693 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:20,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:20,695 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:20,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:20,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:20,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:20,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:20,943 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:20,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2065297244] [2022-01-31 17:44:20,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2065297244] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:20,943 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:20,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 17:44:20,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866765318] [2022-01-31 17:44:20,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:20,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 17:44:20,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:20,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 17:44:20,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-01-31 17:44:20,944 INFO L87 Difference]: Start difference. First operand 156 states and 163 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 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) [2022-01-31 17:44:21,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:21,347 INFO L93 Difference]: Finished difference Result 294 states and 314 transitions. [2022-01-31 17:44:21,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 17:44:21,347 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 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 151 [2022-01-31 17:44:21,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:21,348 INFO L225 Difference]: With dead ends: 294 [2022-01-31 17:44:21,348 INFO L226 Difference]: Without dead ends: 163 [2022-01-31 17:44:21,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 17:44:21,349 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 407 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 407 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:21,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 51 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [407 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:44:21,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-01-31 17:44:21,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2022-01-31 17:44:21,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 157 states have (on average 1.0509554140127388) internal successors, (165), 157 states have internal predecessors, (165), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:21,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 170 transitions. [2022-01-31 17:44:21,354 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 170 transitions. Word has length 151 [2022-01-31 17:44:21,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:21,354 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 170 transitions. [2022-01-31 17:44:21,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 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) [2022-01-31 17:44:21,354 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 170 transitions. [2022-01-31 17:44:21,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-01-31 17:44:21,355 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:21,355 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:21,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 17:44:21,355 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:21,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:21,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1816710020, now seen corresponding path program 19 times [2022-01-31 17:44:21,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:21,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1880611494] [2022-01-31 17:44:21,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:21,356 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:21,356 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:21,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:21,358 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:21,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:21,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:21,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:21,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:21,597 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:21,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1880611494] [2022-01-31 17:44:21,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1880611494] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:21,597 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:21,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 17:44:21,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923584529] [2022-01-31 17:44:21,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:21,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 17:44:21,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:21,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 17:44:21,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-01-31 17:44:21,598 INFO L87 Difference]: Start difference. First operand 163 states and 170 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:22,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:22,064 INFO L93 Difference]: Finished difference Result 307 states and 327 transitions. [2022-01-31 17:44:22,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 17:44:22,064 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 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 158 [2022-01-31 17:44:22,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:22,065 INFO L225 Difference]: With dead ends: 307 [2022-01-31 17:44:22,065 INFO L226 Difference]: Without dead ends: 170 [2022-01-31 17:44:22,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 17:44:22,066 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 440 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 440 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:22,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 51 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [440 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:44:22,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-01-31 17:44:22,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2022-01-31 17:44:22,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 164 states have (on average 1.048780487804878) internal successors, (172), 164 states have internal predecessors, (172), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:22,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 177 transitions. [2022-01-31 17:44:22,071 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 177 transitions. Word has length 158 [2022-01-31 17:44:22,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:22,071 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 177 transitions. [2022-01-31 17:44:22,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:22,072 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 177 transitions. [2022-01-31 17:44:22,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-01-31 17:44:22,072 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:22,072 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:22,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 17:44:22,073 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:22,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:22,073 INFO L85 PathProgramCache]: Analyzing trace with hash 460029815, now seen corresponding path program 20 times [2022-01-31 17:44:22,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:22,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [204461652] [2022-01-31 17:44:22,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:22,074 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:22,074 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:22,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:22,076 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:22,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:22,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:22,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:22,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:22,318 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:22,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [204461652] [2022-01-31 17:44:22,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [204461652] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:22,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:22,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 17:44:22,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940402411] [2022-01-31 17:44:22,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:22,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 17:44:22,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:22,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 17:44:22,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-01-31 17:44:22,319 INFO L87 Difference]: Start difference. First operand 170 states and 177 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:22,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:22,780 INFO L93 Difference]: Finished difference Result 320 states and 340 transitions. [2022-01-31 17:44:22,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 17:44:22,780 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 2 states have call successors, (3), 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 165 [2022-01-31 17:44:22,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:22,781 INFO L225 Difference]: With dead ends: 320 [2022-01-31 17:44:22,781 INFO L226 Difference]: Without dead ends: 177 [2022-01-31 17:44:22,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 17:44:22,782 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 496 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 496 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:22,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 51 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [496 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:44:22,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-01-31 17:44:22,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2022-01-31 17:44:22,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 171 states have (on average 1.0467836257309941) internal successors, (179), 171 states have internal predecessors, (179), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:22,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 184 transitions. [2022-01-31 17:44:22,788 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 184 transitions. Word has length 165 [2022-01-31 17:44:22,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:22,789 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 184 transitions. [2022-01-31 17:44:22,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:22,789 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 184 transitions. [2022-01-31 17:44:22,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-01-31 17:44:22,790 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:22,790 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:22,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 17:44:22,790 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:22,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:22,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1757212964, now seen corresponding path program 21 times [2022-01-31 17:44:22,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:22,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [724728841] [2022-01-31 17:44:22,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:22,791 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:22,791 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:22,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:22,794 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:22,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:23,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:23,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:23,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:23,111 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:23,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [724728841] [2022-01-31 17:44:23,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [724728841] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:23,112 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:23,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 17:44:23,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841093287] [2022-01-31 17:44:23,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:23,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 17:44:23,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:23,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 17:44:23,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2022-01-31 17:44:23,113 INFO L87 Difference]: Start difference. First operand 177 states and 184 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:23,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:23,679 INFO L93 Difference]: Finished difference Result 333 states and 353 transitions. [2022-01-31 17:44:23,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 17:44:23,680 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 172 [2022-01-31 17:44:23,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:23,681 INFO L225 Difference]: With dead ends: 333 [2022-01-31 17:44:23,681 INFO L226 Difference]: Without dead ends: 184 [2022-01-31 17:44:23,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 17:44:23,682 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 591 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 591 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:23,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [591 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:44:23,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-01-31 17:44:23,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2022-01-31 17:44:23,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 178 states have (on average 1.0449438202247192) internal successors, (186), 178 states have internal predecessors, (186), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:23,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 191 transitions. [2022-01-31 17:44:23,687 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 191 transitions. Word has length 172 [2022-01-31 17:44:23,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:23,687 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 191 transitions. [2022-01-31 17:44:23,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:23,688 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 191 transitions. [2022-01-31 17:44:23,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-01-31 17:44:23,688 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:23,688 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:23,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 17:44:23,689 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:23,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:23,689 INFO L85 PathProgramCache]: Analyzing trace with hash 95732439, now seen corresponding path program 22 times [2022-01-31 17:44:23,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:23,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1498553082] [2022-01-31 17:44:23,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:23,690 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:23,690 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:23,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:23,693 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:23,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:23,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:23,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:23,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:23,970 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:23,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1498553082] [2022-01-31 17:44:23,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1498553082] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:23,970 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:23,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 17:44:23,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520607121] [2022-01-31 17:44:23,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:23,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 17:44:23,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:23,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 17:44:23,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 17:44:23,971 INFO L87 Difference]: Start difference. First operand 184 states and 191 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:24,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:24,454 INFO L93 Difference]: Finished difference Result 346 states and 366 transitions. [2022-01-31 17:44:24,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 17:44:24,454 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 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 179 [2022-01-31 17:44:24,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:24,455 INFO L225 Difference]: With dead ends: 346 [2022-01-31 17:44:24,455 INFO L226 Difference]: Without dead ends: 191 [2022-01-31 17:44:24,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 17:44:24,457 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 485 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 485 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:24,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 56 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [485 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:44:24,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-01-31 17:44:24,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2022-01-31 17:44:24,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 185 states have (on average 1.0432432432432432) internal successors, (193), 185 states have internal predecessors, (193), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:24,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 198 transitions. [2022-01-31 17:44:24,462 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 198 transitions. Word has length 179 [2022-01-31 17:44:24,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:24,463 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 198 transitions. [2022-01-31 17:44:24,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:24,463 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 198 transitions. [2022-01-31 17:44:24,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-01-31 17:44:24,464 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:24,464 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:24,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 17:44:24,464 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:24,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:24,464 INFO L85 PathProgramCache]: Analyzing trace with hash 964869828, now seen corresponding path program 23 times [2022-01-31 17:44:24,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:24,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [386792313] [2022-01-31 17:44:24,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:24,467 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:24,468 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:24,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:24,471 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:24,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:24,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:24,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:24,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:24,780 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:24,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [386792313] [2022-01-31 17:44:24,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [386792313] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:24,781 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:24,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 17:44:24,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210948378] [2022-01-31 17:44:24,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:24,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 17:44:24,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:24,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 17:44:24,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2022-01-31 17:44:24,783 INFO L87 Difference]: Start difference. First operand 191 states and 198 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:25,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:25,352 INFO L93 Difference]: Finished difference Result 359 states and 379 transitions. [2022-01-31 17:44:25,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 17:44:25,352 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 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 186 [2022-01-31 17:44:25,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:25,353 INFO L225 Difference]: With dead ends: 359 [2022-01-31 17:44:25,353 INFO L226 Difference]: Without dead ends: 198 [2022-01-31 17:44:25,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 17:44:25,354 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 604 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 604 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:25,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 46 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [604 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:44:25,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-01-31 17:44:25,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2022-01-31 17:44:25,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 192 states have (on average 1.0416666666666667) internal successors, (200), 192 states have internal predecessors, (200), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:25,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 205 transitions. [2022-01-31 17:44:25,360 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 205 transitions. Word has length 186 [2022-01-31 17:44:25,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:25,360 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 205 transitions. [2022-01-31 17:44:25,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:25,360 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 205 transitions. [2022-01-31 17:44:25,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-01-31 17:44:25,360 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:25,361 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:25,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 17:44:25,361 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:25,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:25,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1699667511, now seen corresponding path program 24 times [2022-01-31 17:44:25,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:25,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1832307920] [2022-01-31 17:44:25,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:25,362 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:25,362 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:25,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:25,365 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:25,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:25,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:25,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:25,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:25,702 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:25,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1832307920] [2022-01-31 17:44:25,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1832307920] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:25,702 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:25,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 17:44:25,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201995717] [2022-01-31 17:44:25,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:25,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 17:44:25,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:25,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 17:44:25,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-01-31 17:44:25,703 INFO L87 Difference]: Start difference. First operand 198 states and 205 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:26,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:26,288 INFO L93 Difference]: Finished difference Result 372 states and 392 transitions. [2022-01-31 17:44:26,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 17:44:26,289 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 193 [2022-01-31 17:44:26,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:26,289 INFO L225 Difference]: With dead ends: 372 [2022-01-31 17:44:26,289 INFO L226 Difference]: Without dead ends: 205 [2022-01-31 17:44:26,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 17:44:26,291 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 641 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 641 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:26,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 56 Invalid, 915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [641 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:44:26,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-01-31 17:44:26,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2022-01-31 17:44:26,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 199 states have (on average 1.0402010050251256) internal successors, (207), 199 states have internal predecessors, (207), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:26,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 212 transitions. [2022-01-31 17:44:26,296 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 212 transitions. Word has length 193 [2022-01-31 17:44:26,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:26,296 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 212 transitions. [2022-01-31 17:44:26,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:26,296 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 212 transitions. [2022-01-31 17:44:26,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-01-31 17:44:26,297 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:26,297 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:26,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 17:44:26,297 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:26,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:26,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1252799588, now seen corresponding path program 25 times [2022-01-31 17:44:26,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:26,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [743745489] [2022-01-31 17:44:26,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:26,298 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:26,299 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:26,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:26,301 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:26,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:26,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:26,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:26,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:26,658 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:26,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [743745489] [2022-01-31 17:44:26,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [743745489] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:26,658 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:26,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 17:44:26,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459860155] [2022-01-31 17:44:26,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:26,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 17:44:26,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:26,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 17:44:26,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2022-01-31 17:44:26,660 INFO L87 Difference]: Start difference. First operand 205 states and 212 transitions. Second operand has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:27,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:27,103 INFO L93 Difference]: Finished difference Result 385 states and 405 transitions. [2022-01-31 17:44:27,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 17:44:27,103 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 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 200 [2022-01-31 17:44:27,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:27,104 INFO L225 Difference]: With dead ends: 385 [2022-01-31 17:44:27,104 INFO L226 Difference]: Without dead ends: 212 [2022-01-31 17:44:27,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 17:44:27,105 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 582 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 582 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:27,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 61 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [582 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:44:27,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-01-31 17:44:27,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2022-01-31 17:44:27,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 206 states have (on average 1.0388349514563107) internal successors, (214), 206 states have internal predecessors, (214), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:27,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 219 transitions. [2022-01-31 17:44:27,111 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 219 transitions. Word has length 200 [2022-01-31 17:44:27,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:27,112 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 219 transitions. [2022-01-31 17:44:27,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:27,112 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 219 transitions. [2022-01-31 17:44:27,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-01-31 17:44:27,112 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:27,112 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:27,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 17:44:27,113 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:27,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:27,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1449644439, now seen corresponding path program 26 times [2022-01-31 17:44:27,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:27,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1567387401] [2022-01-31 17:44:27,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:27,115 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:27,115 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:27,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:27,119 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:27,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:27,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:27,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:27,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:27,511 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:27,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1567387401] [2022-01-31 17:44:27,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1567387401] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:27,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:27,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 17:44:27,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938364159] [2022-01-31 17:44:27,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:27,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 17:44:27,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:27,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 17:44:27,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-01-31 17:44:27,513 INFO L87 Difference]: Start difference. First operand 212 states and 219 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:28,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:28,172 INFO L93 Difference]: Finished difference Result 398 states and 418 transitions. [2022-01-31 17:44:28,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 17:44:28,173 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 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 207 [2022-01-31 17:44:28,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:28,173 INFO L225 Difference]: With dead ends: 398 [2022-01-31 17:44:28,173 INFO L226 Difference]: Without dead ends: 219 [2022-01-31 17:44:28,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 17:44:28,175 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 707 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 707 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:28,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 56 Invalid, 995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [707 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:44:28,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-01-31 17:44:28,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2022-01-31 17:44:28,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 213 states have (on average 1.0375586854460095) internal successors, (221), 213 states have internal predecessors, (221), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:28,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 226 transitions. [2022-01-31 17:44:28,182 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 226 transitions. Word has length 207 [2022-01-31 17:44:28,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:28,182 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 226 transitions. [2022-01-31 17:44:28,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:28,182 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 226 transitions. [2022-01-31 17:44:28,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-01-31 17:44:28,183 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:28,183 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:28,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 17:44:28,183 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:28,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:28,183 INFO L85 PathProgramCache]: Analyzing trace with hash -154447356, now seen corresponding path program 27 times [2022-01-31 17:44:28,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:28,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [396462822] [2022-01-31 17:44:28,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:28,185 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:28,185 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:28,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:28,189 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:28,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:28,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:28,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:28,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:28,607 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:28,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [396462822] [2022-01-31 17:44:28,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [396462822] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:28,608 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:28,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 17:44:28,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708971618] [2022-01-31 17:44:28,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:28,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 17:44:28,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:28,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 17:44:28,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2022-01-31 17:44:28,609 INFO L87 Difference]: Start difference. First operand 219 states and 226 transitions. Second operand has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:29,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:29,177 INFO L93 Difference]: Finished difference Result 411 states and 431 transitions. [2022-01-31 17:44:29,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 17:44:29,177 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 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 214 [2022-01-31 17:44:29,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:29,178 INFO L225 Difference]: With dead ends: 411 [2022-01-31 17:44:29,178 INFO L226 Difference]: Without dead ends: 226 [2022-01-31 17:44:29,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 17:44:29,183 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 694 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 694 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:29,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 46 Invalid, 953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [694 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:44:29,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-01-31 17:44:29,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2022-01-31 17:44:29,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 220 states have (on average 1.0363636363636364) internal successors, (228), 220 states have internal predecessors, (228), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:29,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 233 transitions. [2022-01-31 17:44:29,189 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 233 transitions. Word has length 214 [2022-01-31 17:44:29,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:29,190 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 233 transitions. [2022-01-31 17:44:29,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:29,190 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 233 transitions. [2022-01-31 17:44:29,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-01-31 17:44:29,190 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:29,190 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:29,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 17:44:29,191 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:29,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:29,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1767006985, now seen corresponding path program 28 times [2022-01-31 17:44:29,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:29,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [71912031] [2022-01-31 17:44:29,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:29,192 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:29,192 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:29,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:29,196 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:29,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:29,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:29,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:29,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:29,554 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:29,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [71912031] [2022-01-31 17:44:29,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [71912031] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:29,554 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:29,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 17:44:29,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225985856] [2022-01-31 17:44:29,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:29,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 17:44:29,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:29,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 17:44:29,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-01-31 17:44:29,555 INFO L87 Difference]: Start difference. First operand 226 states and 233 transitions. Second operand has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:30,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:30,283 INFO L93 Difference]: Finished difference Result 424 states and 444 transitions. [2022-01-31 17:44:30,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 17:44:30,283 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 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 221 [2022-01-31 17:44:30,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:30,287 INFO L225 Difference]: With dead ends: 424 [2022-01-31 17:44:30,287 INFO L226 Difference]: Without dead ends: 233 [2022-01-31 17:44:30,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 17:44:30,291 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 726 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 726 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:30,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 46 Invalid, 992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [726 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:44:30,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-01-31 17:44:30,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2022-01-31 17:44:30,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 227 states have (on average 1.0352422907488987) internal successors, (235), 227 states have internal predecessors, (235), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:30,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 240 transitions. [2022-01-31 17:44:30,313 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 240 transitions. Word has length 221 [2022-01-31 17:44:30,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:30,313 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 240 transitions. [2022-01-31 17:44:30,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:30,313 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 240 transitions. [2022-01-31 17:44:30,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2022-01-31 17:44:30,314 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:30,314 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:30,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 17:44:30,314 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:30,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:30,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1494083676, now seen corresponding path program 29 times [2022-01-31 17:44:30,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:30,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1199046250] [2022-01-31 17:44:30,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:30,327 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:30,327 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:30,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:30,331 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:30,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:30,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:30,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:30,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:30,752 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:30,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1199046250] [2022-01-31 17:44:30,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1199046250] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:30,752 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:30,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 17:44:30,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28554206] [2022-01-31 17:44:30,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:30,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 17:44:30,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:30,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 17:44:30,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 17:44:30,753 INFO L87 Difference]: Start difference. First operand 233 states and 240 transitions. Second operand has 33 states, 33 states have (on average 1.696969696969697) internal successors, (56), 32 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:31,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:31,506 INFO L93 Difference]: Finished difference Result 437 states and 457 transitions. [2022-01-31 17:44:31,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 17:44:31,506 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.696969696969697) internal successors, (56), 32 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 228 [2022-01-31 17:44:31,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:31,507 INFO L225 Difference]: With dead ends: 437 [2022-01-31 17:44:31,507 INFO L226 Difference]: Without dead ends: 240 [2022-01-31 17:44:31,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 17:44:31,508 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 745 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 745 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:31,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 51 Invalid, 1036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [745 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:44:31,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-01-31 17:44:31,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2022-01-31 17:44:31,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 234 states have (on average 1.0341880341880343) internal successors, (242), 234 states have internal predecessors, (242), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:31,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 247 transitions. [2022-01-31 17:44:31,515 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 247 transitions. Word has length 228 [2022-01-31 17:44:31,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:31,515 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 247 transitions. [2022-01-31 17:44:31,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.696969696969697) internal successors, (56), 32 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:31,515 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 247 transitions. [2022-01-31 17:44:31,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-01-31 17:44:31,516 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:31,516 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:31,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 17:44:31,516 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:31,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:31,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1699627095, now seen corresponding path program 30 times [2022-01-31 17:44:31,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:31,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [672558976] [2022-01-31 17:44:31,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:31,517 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:31,517 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:31,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:31,522 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:31,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:32,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:32,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:32,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:32,016 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:32,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [672558976] [2022-01-31 17:44:32,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [672558976] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:32,016 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:32,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 17:44:32,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018798182] [2022-01-31 17:44:32,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:32,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 17:44:32,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:32,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 17:44:32,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 17:44:32,018 INFO L87 Difference]: Start difference. First operand 240 states and 247 transitions. Second operand has 34 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 33 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:32,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:32,899 INFO L93 Difference]: Finished difference Result 450 states and 470 transitions. [2022-01-31 17:44:32,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 17:44:32,899 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 33 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 235 [2022-01-31 17:44:32,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:32,900 INFO L225 Difference]: With dead ends: 450 [2022-01-31 17:44:32,900 INFO L226 Difference]: Without dead ends: 247 [2022-01-31 17:44:32,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 17:44:32,902 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 758 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 758 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:32,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 46 Invalid, 1038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [758 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:44:32,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-01-31 17:44:32,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2022-01-31 17:44:32,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 241 states have (on average 1.033195020746888) internal successors, (249), 241 states have internal predecessors, (249), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:32,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 254 transitions. [2022-01-31 17:44:32,914 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 254 transitions. Word has length 235 [2022-01-31 17:44:32,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:32,914 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 254 transitions. [2022-01-31 17:44:32,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 33 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:32,915 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 254 transitions. [2022-01-31 17:44:32,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-01-31 17:44:32,917 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:32,917 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:32,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 17:44:32,917 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:32,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:32,917 INFO L85 PathProgramCache]: Analyzing trace with hash -223181500, now seen corresponding path program 31 times [2022-01-31 17:44:32,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:32,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1171999783] [2022-01-31 17:44:32,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:32,919 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:32,919 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:32,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:32,923 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:33,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:33,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:33,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:33,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:33,437 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:33,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1171999783] [2022-01-31 17:44:33,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1171999783] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:33,437 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:33,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 17:44:33,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820019007] [2022-01-31 17:44:33,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:33,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 17:44:33,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:33,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 17:44:33,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 17:44:33,438 INFO L87 Difference]: Start difference. First operand 247 states and 254 transitions. Second operand has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:33,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:33,988 INFO L93 Difference]: Finished difference Result 463 states and 483 transitions. [2022-01-31 17:44:33,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 17:44:33,997 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 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 242 [2022-01-31 17:44:33,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:33,997 INFO L225 Difference]: With dead ends: 463 [2022-01-31 17:44:33,997 INFO L226 Difference]: Without dead ends: 254 [2022-01-31 17:44:33,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 17:44:33,999 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 720 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 1061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 720 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:33,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 61 Invalid, 1061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [720 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:44:33,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-01-31 17:44:34,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2022-01-31 17:44:34,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 248 states have (on average 1.032258064516129) internal successors, (256), 248 states have internal predecessors, (256), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:34,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 261 transitions. [2022-01-31 17:44:34,007 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 261 transitions. Word has length 242 [2022-01-31 17:44:34,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:34,007 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 261 transitions. [2022-01-31 17:44:34,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:34,008 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 261 transitions. [2022-01-31 17:44:34,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-01-31 17:44:34,009 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:34,009 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:34,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 17:44:34,009 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:34,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:34,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1660402615, now seen corresponding path program 32 times [2022-01-31 17:44:34,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:34,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [874126413] [2022-01-31 17:44:34,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:34,011 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:34,011 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:34,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:34,015 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:34,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:34,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:34,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:34,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:34,541 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:34,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [874126413] [2022-01-31 17:44:34,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [874126413] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:34,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:34,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 17:44:34,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149636211] [2022-01-31 17:44:34,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:34,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 17:44:34,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:34,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 17:44:34,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 17:44:34,542 INFO L87 Difference]: Start difference. First operand 254 states and 261 transitions. Second operand has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:35,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:35,424 INFO L93 Difference]: Finished difference Result 476 states and 496 transitions. [2022-01-31 17:44:35,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 17:44:35,424 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 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 249 [2022-01-31 17:44:35,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:35,425 INFO L225 Difference]: With dead ends: 476 [2022-01-31 17:44:35,425 INFO L226 Difference]: Without dead ends: 261 [2022-01-31 17:44:35,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1785, Invalid=2907, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 17:44:35,427 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 814 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 1144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 814 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:35,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 56 Invalid, 1144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [814 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:44:35,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-01-31 17:44:35,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2022-01-31 17:44:35,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 255 states have (on average 1.031372549019608) internal successors, (263), 255 states have internal predecessors, (263), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:35,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 268 transitions. [2022-01-31 17:44:35,433 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 268 transitions. Word has length 249 [2022-01-31 17:44:35,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:35,433 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 268 transitions. [2022-01-31 17:44:35,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:35,433 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 268 transitions. [2022-01-31 17:44:35,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2022-01-31 17:44:35,434 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:35,435 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:35,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 17:44:35,435 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:35,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:35,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1071736092, now seen corresponding path program 33 times [2022-01-31 17:44:35,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:35,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1639404187] [2022-01-31 17:44:35,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:35,436 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:35,436 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:35,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:35,442 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:35,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:35,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:35,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:35,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:35,980 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:35,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1639404187] [2022-01-31 17:44:35,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1639404187] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:35,980 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:35,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 17:44:35,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123395308] [2022-01-31 17:44:35,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:35,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 17:44:35,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:35,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 17:44:35,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 17:44:35,982 INFO L87 Difference]: Start difference. First operand 261 states and 268 transitions. Second operand has 37 states, 37 states have (on average 1.6216216216216217) internal successors, (60), 36 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:36,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:36,860 INFO L93 Difference]: Finished difference Result 489 states and 509 transitions. [2022-01-31 17:44:36,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 17:44:36,860 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.6216216216216217) internal successors, (60), 36 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 256 [2022-01-31 17:44:36,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:36,861 INFO L225 Difference]: With dead ends: 489 [2022-01-31 17:44:36,861 INFO L226 Difference]: Without dead ends: 268 [2022-01-31 17:44:36,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 17:44:36,862 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 1108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 1391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1108 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:36,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 1391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1108 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:44:36,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-01-31 17:44:36,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2022-01-31 17:44:36,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 262 states have (on average 1.0305343511450382) internal successors, (270), 262 states have internal predecessors, (270), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:36,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 275 transitions. [2022-01-31 17:44:36,869 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 275 transitions. Word has length 256 [2022-01-31 17:44:36,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:36,869 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 275 transitions. [2022-01-31 17:44:36,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.6216216216216217) internal successors, (60), 36 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:36,869 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 275 transitions. [2022-01-31 17:44:36,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-01-31 17:44:36,870 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:36,870 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:36,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 17:44:36,870 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:36,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:36,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1909985047, now seen corresponding path program 34 times [2022-01-31 17:44:36,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:36,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [403308575] [2022-01-31 17:44:36,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:36,872 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:36,872 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:36,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:36,876 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:36,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:37,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:37,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:37,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:37,436 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:37,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [403308575] [2022-01-31 17:44:37,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [403308575] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:37,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:37,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 17:44:37,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177703913] [2022-01-31 17:44:37,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:37,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 17:44:37,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:37,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 17:44:37,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 17:44:37,437 INFO L87 Difference]: Start difference. First operand 268 states and 275 transitions. Second operand has 38 states, 38 states have (on average 1.605263157894737) internal successors, (61), 37 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:38,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:38,320 INFO L93 Difference]: Finished difference Result 502 states and 522 transitions. [2022-01-31 17:44:38,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 17:44:38,320 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.605263157894737) internal successors, (61), 37 states have internal predecessors, (61), 2 states have call successors, (3), 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 263 [2022-01-31 17:44:38,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:38,331 INFO L225 Difference]: With dead ends: 502 [2022-01-31 17:44:38,331 INFO L226 Difference]: Without dead ends: 275 [2022-01-31 17:44:38,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 17:44:38,332 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 874 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 1218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 874 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:38,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 56 Invalid, 1218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [874 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:44:38,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-01-31 17:44:38,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2022-01-31 17:44:38,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 269 states have (on average 1.029739776951673) internal successors, (277), 269 states have internal predecessors, (277), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:38,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 282 transitions. [2022-01-31 17:44:38,338 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 282 transitions. Word has length 263 [2022-01-31 17:44:38,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:38,338 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 282 transitions. [2022-01-31 17:44:38,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.605263157894737) internal successors, (61), 37 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:38,338 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 282 transitions. [2022-01-31 17:44:38,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-01-31 17:44:38,339 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:38,339 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:38,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 17:44:38,339 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:38,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:38,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1674074244, now seen corresponding path program 35 times [2022-01-31 17:44:38,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:38,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1585848473] [2022-01-31 17:44:38,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:38,341 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:38,341 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:38,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:38,346 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:38,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:38,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:38,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:38,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:38,801 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:38,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1585848473] [2022-01-31 17:44:38,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1585848473] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:38,802 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:38,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 17:44:38,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903854473] [2022-01-31 17:44:38,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:38,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 17:44:38,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:38,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 17:44:38,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 17:44:38,804 INFO L87 Difference]: Start difference. First operand 275 states and 282 transitions. Second operand has 39 states, 39 states have (on average 1.5897435897435896) internal successors, (62), 38 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:39,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:39,499 INFO L93 Difference]: Finished difference Result 515 states and 535 transitions. [2022-01-31 17:44:39,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 17:44:39,499 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.5897435897435896) internal successors, (62), 38 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 270 [2022-01-31 17:44:39,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:39,500 INFO L225 Difference]: With dead ends: 515 [2022-01-31 17:44:39,500 INFO L226 Difference]: Without dead ends: 282 [2022-01-31 17:44:39,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 17:44:39,501 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 910 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 1261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 910 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:39,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 56 Invalid, 1261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [910 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:44:39,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-01-31 17:44:39,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 282. [2022-01-31 17:44:39,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 276 states have (on average 1.0289855072463767) internal successors, (284), 276 states have internal predecessors, (284), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:39,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 289 transitions. [2022-01-31 17:44:39,507 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 289 transitions. Word has length 270 [2022-01-31 17:44:39,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:39,507 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 289 transitions. [2022-01-31 17:44:39,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.5897435897435896) internal successors, (62), 38 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:39,507 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 289 transitions. [2022-01-31 17:44:39,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2022-01-31 17:44:39,508 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:39,508 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:39,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 17:44:39,508 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:39,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:39,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1784857993, now seen corresponding path program 36 times [2022-01-31 17:44:39,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:39,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [916192593] [2022-01-31 17:44:39,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:39,509 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:39,509 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:39,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:39,514 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:39,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:39,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:39,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:39,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:39,962 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:39,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [916192593] [2022-01-31 17:44:39,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [916192593] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:39,962 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:39,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 17:44:39,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491646768] [2022-01-31 17:44:39,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:39,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 17:44:39,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:39,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 17:44:39,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 17:44:39,965 INFO L87 Difference]: Start difference. First operand 282 states and 289 transitions. Second operand has 40 states, 40 states have (on average 1.575) internal successors, (63), 39 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) [2022-01-31 17:44:41,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:41,003 INFO L93 Difference]: Finished difference Result 528 states and 548 transitions. [2022-01-31 17:44:41,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 17:44:41,003 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.575) internal successors, (63), 39 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 277 [2022-01-31 17:44:41,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:41,004 INFO L225 Difference]: With dead ends: 528 [2022-01-31 17:44:41,004 INFO L226 Difference]: Without dead ends: 289 [2022-01-31 17:44:41,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 17:44:41,005 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 1166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1166 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:41,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 46 Invalid, 1488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1166 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:44:41,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-01-31 17:44:41,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2022-01-31 17:44:41,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 283 states have (on average 1.028268551236749) internal successors, (291), 283 states have internal predecessors, (291), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:41,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 296 transitions. [2022-01-31 17:44:41,012 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 296 transitions. Word has length 277 [2022-01-31 17:44:41,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:41,012 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 296 transitions. [2022-01-31 17:44:41,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.575) internal successors, (63), 39 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) [2022-01-31 17:44:41,012 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 296 transitions. [2022-01-31 17:44:41,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2022-01-31 17:44:41,013 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:41,013 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:41,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 17:44:41,013 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:41,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:41,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1061044700, now seen corresponding path program 37 times [2022-01-31 17:44:41,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:41,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1211016170] [2022-01-31 17:44:41,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:41,014 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:41,014 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:41,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:41,020 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:41,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:41,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:41,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:41,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:41,510 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:41,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1211016170] [2022-01-31 17:44:41,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1211016170] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:41,510 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:41,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 17:44:41,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531372784] [2022-01-31 17:44:41,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:41,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 17:44:41,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:41,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 17:44:41,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 17:44:41,511 INFO L87 Difference]: Start difference. First operand 289 states and 296 transitions. Second operand has 41 states, 41 states have (on average 1.5609756097560976) internal successors, (64), 40 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) [2022-01-31 17:44:42,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:42,249 INFO L93 Difference]: Finished difference Result 541 states and 561 transitions. [2022-01-31 17:44:42,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 17:44:42,249 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.5609756097560976) internal successors, (64), 40 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 284 [2022-01-31 17:44:42,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:42,252 INFO L225 Difference]: With dead ends: 541 [2022-01-31 17:44:42,255 INFO L226 Difference]: Without dead ends: 296 [2022-01-31 17:44:42,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 17:44:42,276 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 1017 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 1400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1017 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:42,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 61 Invalid, 1400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1017 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:44:42,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-01-31 17:44:42,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 296. [2022-01-31 17:44:42,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 290 states have (on average 1.0275862068965518) internal successors, (298), 290 states have internal predecessors, (298), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:42,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 303 transitions. [2022-01-31 17:44:42,283 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 303 transitions. Word has length 284 [2022-01-31 17:44:42,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:42,284 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 303 transitions. [2022-01-31 17:44:42,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.5609756097560976) internal successors, (64), 40 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) [2022-01-31 17:44:42,284 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 303 transitions. [2022-01-31 17:44:42,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2022-01-31 17:44:42,291 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:42,291 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:42,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 17:44:42,292 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:42,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:42,292 INFO L85 PathProgramCache]: Analyzing trace with hash -747291177, now seen corresponding path program 38 times [2022-01-31 17:44:42,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:42,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1429081220] [2022-01-31 17:44:42,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:42,293 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:42,293 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:42,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:42,299 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:42,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:42,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:42,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:42,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:42,970 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:42,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1429081220] [2022-01-31 17:44:42,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1429081220] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:42,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:42,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 17:44:42,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183943357] [2022-01-31 17:44:42,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:42,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 17:44:42,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:42,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 17:44:42,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 17:44:42,972 INFO L87 Difference]: Start difference. First operand 296 states and 303 transitions. Second operand has 42 states, 42 states have (on average 1.5476190476190477) internal successors, (65), 41 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:44,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:44,091 INFO L93 Difference]: Finished difference Result 554 states and 574 transitions. [2022-01-31 17:44:44,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 17:44:44,091 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.5476190476190477) internal successors, (65), 41 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 291 [2022-01-31 17:44:44,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:44,092 INFO L225 Difference]: With dead ends: 554 [2022-01-31 17:44:44,092 INFO L226 Difference]: Without dead ends: 303 [2022-01-31 17:44:44,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2460, Invalid=4020, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 17:44:44,094 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 1069 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 1459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1069 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:44,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 61 Invalid, 1459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1069 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:44:44,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-01-31 17:44:44,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 303. [2022-01-31 17:44:44,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 297 states have (on average 1.026936026936027) internal successors, (305), 297 states have internal predecessors, (305), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:44,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 310 transitions. [2022-01-31 17:44:44,101 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 310 transitions. Word has length 291 [2022-01-31 17:44:44,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:44,101 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 310 transitions. [2022-01-31 17:44:44,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.5476190476190477) internal successors, (65), 41 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:44,102 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 310 transitions. [2022-01-31 17:44:44,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2022-01-31 17:44:44,102 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:44,103 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:44,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 17:44:44,103 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:44,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:44,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1755106244, now seen corresponding path program 39 times [2022-01-31 17:44:44,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:44,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [579102168] [2022-01-31 17:44:44,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:44,104 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:44,104 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:44,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:44,111 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:44,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:44,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:44,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:44,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:44,817 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:44,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [579102168] [2022-01-31 17:44:44,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [579102168] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:44,817 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:44,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 17:44:44,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564319733] [2022-01-31 17:44:44,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:44,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 17:44:44,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:44,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 17:44:44,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 17:44:44,819 INFO L87 Difference]: Start difference. First operand 303 states and 310 transitions. Second operand has 43 states, 43 states have (on average 1.5348837209302326) internal successors, (66), 42 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) [2022-01-31 17:44:45,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:45,611 INFO L93 Difference]: Finished difference Result 567 states and 587 transitions. [2022-01-31 17:44:45,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 17:44:45,611 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.5348837209302326) internal successors, (66), 42 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 298 [2022-01-31 17:44:45,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:45,612 INFO L225 Difference]: With dead ends: 567 [2022-01-31 17:44:45,612 INFO L226 Difference]: Without dead ends: 310 [2022-01-31 17:44:45,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 17:44:45,613 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 1228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1228 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:45,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 46 Invalid, 1571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1228 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:44:45,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-01-31 17:44:45,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 310. [2022-01-31 17:44:45,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 304 states have (on average 1.0263157894736843) internal successors, (312), 304 states have internal predecessors, (312), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:45,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 317 transitions. [2022-01-31 17:44:45,619 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 317 transitions. Word has length 298 [2022-01-31 17:44:45,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:45,619 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 317 transitions. [2022-01-31 17:44:45,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.5348837209302326) internal successors, (66), 42 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) [2022-01-31 17:44:45,619 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 317 transitions. [2022-01-31 17:44:45,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2022-01-31 17:44:45,620 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:45,620 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:45,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 17:44:45,621 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:45,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:45,621 INFO L85 PathProgramCache]: Analyzing trace with hash 302913847, now seen corresponding path program 40 times [2022-01-31 17:44:45,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:45,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [619804655] [2022-01-31 17:44:45,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:45,622 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:45,622 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:45,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:45,628 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:45,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:46,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:46,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:46,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:46,321 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:46,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [619804655] [2022-01-31 17:44:46,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [619804655] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:46,321 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:46,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 17:44:46,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897123670] [2022-01-31 17:44:46,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:46,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 17:44:46,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:46,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 17:44:46,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 17:44:46,322 INFO L87 Difference]: Start difference. First operand 310 states and 317 transitions. Second operand has 44 states, 44 states have (on average 1.5227272727272727) internal successors, (67), 43 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) [2022-01-31 17:44:47,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:47,472 INFO L93 Difference]: Finished difference Result 580 states and 600 transitions. [2022-01-31 17:44:47,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 17:44:47,475 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.5227272727272727) internal successors, (67), 43 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 305 [2022-01-31 17:44:47,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:47,476 INFO L225 Difference]: With dead ends: 580 [2022-01-31 17:44:47,476 INFO L226 Difference]: Without dead ends: 317 [2022-01-31 17:44:47,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2709, Invalid=4431, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 17:44:47,478 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 1110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1110 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:47,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 46 Invalid, 1460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1110 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:44:47,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-01-31 17:44:47,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 317. [2022-01-31 17:44:47,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 311 states have (on average 1.0257234726688103) internal successors, (319), 311 states have internal predecessors, (319), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:47,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 324 transitions. [2022-01-31 17:44:47,514 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 324 transitions. Word has length 305 [2022-01-31 17:44:47,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:47,514 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 324 transitions. [2022-01-31 17:44:47,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.5227272727272727) internal successors, (67), 43 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) [2022-01-31 17:44:47,514 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 324 transitions. [2022-01-31 17:44:47,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2022-01-31 17:44:47,515 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:47,516 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:47,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 17:44:47,516 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:47,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:47,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1150582428, now seen corresponding path program 41 times [2022-01-31 17:44:47,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:47,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1359612818] [2022-01-31 17:44:47,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:47,518 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:47,518 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:47,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:47,526 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:47,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:48,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:48,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:48,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:48,277 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:48,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1359612818] [2022-01-31 17:44:48,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1359612818] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:48,278 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:48,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 17:44:48,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876433871] [2022-01-31 17:44:48,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:48,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 17:44:48,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:48,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 17:44:48,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 17:44:48,279 INFO L87 Difference]: Start difference. First operand 317 states and 324 transitions. Second operand has 45 states, 45 states have (on average 1.511111111111111) internal successors, (68), 44 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) [2022-01-31 17:44:49,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:49,279 INFO L93 Difference]: Finished difference Result 593 states and 613 transitions. [2022-01-31 17:44:49,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 17:44:49,279 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.511111111111111) internal successors, (68), 44 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 312 [2022-01-31 17:44:49,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:49,280 INFO L225 Difference]: With dead ends: 593 [2022-01-31 17:44:49,280 INFO L226 Difference]: Without dead ends: 324 [2022-01-31 17:44:49,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2838, Invalid=4644, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 17:44:49,281 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 1085 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 1496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1085 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:49,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 61 Invalid, 1496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1085 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:44:49,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-01-31 17:44:49,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 324. [2022-01-31 17:44:49,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 318 states have (on average 1.0251572327044025) internal successors, (326), 318 states have internal predecessors, (326), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:49,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 331 transitions. [2022-01-31 17:44:49,288 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 331 transitions. Word has length 312 [2022-01-31 17:44:49,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:49,288 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 331 transitions. [2022-01-31 17:44:49,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.511111111111111) internal successors, (68), 44 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) [2022-01-31 17:44:49,288 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 331 transitions. [2022-01-31 17:44:49,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2022-01-31 17:44:49,289 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:49,289 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:49,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 17:44:49,289 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:49,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:49,290 INFO L85 PathProgramCache]: Analyzing trace with hash -107623273, now seen corresponding path program 42 times [2022-01-31 17:44:49,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:49,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [487792689] [2022-01-31 17:44:49,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:49,291 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:49,291 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:49,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:49,297 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:49,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:50,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:50,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:50,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:50,021 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:50,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [487792689] [2022-01-31 17:44:50,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [487792689] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:50,021 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:50,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 17:44:50,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701170156] [2022-01-31 17:44:50,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:50,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 17:44:50,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:50,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 17:44:50,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 17:44:50,022 INFO L87 Difference]: Start difference. First operand 324 states and 331 transitions. Second operand has 46 states, 46 states have (on average 1.5) internal successors, (69), 45 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) [2022-01-31 17:44:51,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:51,241 INFO L93 Difference]: Finished difference Result 606 states and 626 transitions. [2022-01-31 17:44:51,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 17:44:51,242 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.5) internal successors, (69), 45 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 319 [2022-01-31 17:44:51,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:51,243 INFO L225 Difference]: With dead ends: 606 [2022-01-31 17:44:51,243 INFO L226 Difference]: Without dead ends: 331 [2022-01-31 17:44:51,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2970, Invalid=4862, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 17:44:51,245 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 1075 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 1475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1075 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:51,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 56 Invalid, 1475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1075 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:44:51,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-01-31 17:44:51,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 331. [2022-01-31 17:44:51,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 325 states have (on average 1.0246153846153847) internal successors, (333), 325 states have internal predecessors, (333), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:51,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 338 transitions. [2022-01-31 17:44:51,282 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 338 transitions. Word has length 319 [2022-01-31 17:44:51,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:51,282 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 338 transitions. [2022-01-31 17:44:51,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.5) internal successors, (69), 45 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) [2022-01-31 17:44:51,282 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 338 transitions. [2022-01-31 17:44:51,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2022-01-31 17:44:51,283 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:51,283 INFO L514 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:51,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 17:44:51,284 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:51,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:51,284 INFO L85 PathProgramCache]: Analyzing trace with hash 130014980, now seen corresponding path program 43 times [2022-01-31 17:44:51,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:51,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [618259248] [2022-01-31 17:44:51,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:51,286 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:51,286 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:51,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:51,295 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:51,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:52,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:52,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:52,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:52,028 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:52,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [618259248] [2022-01-31 17:44:52,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [618259248] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:52,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:52,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 17:44:52,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436245304] [2022-01-31 17:44:52,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:52,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 17:44:52,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:52,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 17:44:52,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 17:44:52,029 INFO L87 Difference]: Start difference. First operand 331 states and 338 transitions. Second operand has 47 states, 47 states have (on average 1.4893617021276595) internal successors, (70), 46 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) [2022-01-31 17:44:53,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:53,318 INFO L93 Difference]: Finished difference Result 619 states and 639 transitions. [2022-01-31 17:44:53,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 17:44:53,319 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.4893617021276595) internal successors, (70), 46 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 326 [2022-01-31 17:44:53,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:53,320 INFO L225 Difference]: With dead ends: 619 [2022-01-31 17:44:53,320 INFO L226 Difference]: Without dead ends: 338 [2022-01-31 17:44:53,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3105, Invalid=5085, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 17:44:53,321 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 1328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 1681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1328 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:53,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 1681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1328 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:44:53,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-01-31 17:44:53,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 338. [2022-01-31 17:44:53,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 332 states have (on average 1.0240963855421688) internal successors, (340), 332 states have internal predecessors, (340), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:53,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 345 transitions. [2022-01-31 17:44:53,328 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 345 transitions. Word has length 326 [2022-01-31 17:44:53,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:53,329 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 345 transitions. [2022-01-31 17:44:53,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.4893617021276595) internal successors, (70), 46 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) [2022-01-31 17:44:53,329 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 345 transitions. [2022-01-31 17:44:53,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2022-01-31 17:44:53,330 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:53,330 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:53,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 17:44:53,330 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:53,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:53,330 INFO L85 PathProgramCache]: Analyzing trace with hash -742762505, now seen corresponding path program 44 times [2022-01-31 17:44:53,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:53,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1596747218] [2022-01-31 17:44:53,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:53,331 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:53,331 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:53,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:53,340 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:53,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:54,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:54,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:54,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:54,114 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:54,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1596747218] [2022-01-31 17:44:54,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1596747218] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:54,115 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:54,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 17:44:54,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876807328] [2022-01-31 17:44:54,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:54,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 17:44:54,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:54,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 17:44:54,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 17:44:54,116 INFO L87 Difference]: Start difference. First operand 338 states and 345 transitions. Second operand has 48 states, 48 states have (on average 1.4791666666666667) internal successors, (71), 47 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) [2022-01-31 17:44:55,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:55,281 INFO L93 Difference]: Finished difference Result 632 states and 652 transitions. [2022-01-31 17:44:55,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 17:44:55,282 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.4791666666666667) internal successors, (71), 47 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 333 [2022-01-31 17:44:55,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:55,283 INFO L225 Difference]: With dead ends: 632 [2022-01-31 17:44:55,283 INFO L226 Difference]: Without dead ends: 345 [2022-01-31 17:44:55,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3243, Invalid=5313, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 17:44:55,284 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 1089 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 1539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1089 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:55,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 66 Invalid, 1539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1089 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:44:55,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-01-31 17:44:55,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 345. [2022-01-31 17:44:55,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 339 states have (on average 1.0235988200589972) internal successors, (347), 339 states have internal predecessors, (347), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:55,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 352 transitions. [2022-01-31 17:44:55,291 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 352 transitions. Word has length 333 [2022-01-31 17:44:55,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:55,291 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 352 transitions. [2022-01-31 17:44:55,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.4791666666666667) internal successors, (71), 47 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) [2022-01-31 17:44:55,291 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 352 transitions. [2022-01-31 17:44:55,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2022-01-31 17:44:55,292 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:55,293 INFO L514 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:55,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 17:44:55,293 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:55,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:55,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1431575388, now seen corresponding path program 45 times [2022-01-31 17:44:55,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:55,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443053434] [2022-01-31 17:44:55,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:55,294 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:55,294 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:55,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:55,301 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:55,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:55,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:55,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:55,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:55,876 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:55,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [443053434] [2022-01-31 17:44:55,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [443053434] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:55,876 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:55,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-01-31 17:44:55,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669521224] [2022-01-31 17:44:55,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:55,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 17:44:55,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:55,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 17:44:55,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 17:44:55,877 INFO L87 Difference]: Start difference. First operand 345 states and 352 transitions. Second operand has 49 states, 49 states have (on average 1.469387755102041) internal successors, (72), 48 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) [2022-01-31 17:44:57,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:57,249 INFO L93 Difference]: Finished difference Result 645 states and 665 transitions. [2022-01-31 17:44:57,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 17:44:57,250 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.469387755102041) internal successors, (72), 48 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 340 [2022-01-31 17:44:57,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:57,251 INFO L225 Difference]: With dead ends: 645 [2022-01-31 17:44:57,251 INFO L226 Difference]: Without dead ends: 352 [2022-01-31 17:44:57,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3384, Invalid=5546, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 17:44:57,252 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 1505 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 1872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1505 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:57,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 1872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1505 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:44:57,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-01-31 17:44:57,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 352. [2022-01-31 17:44:57,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 346 states have (on average 1.023121387283237) internal successors, (354), 346 states have internal predecessors, (354), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:57,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 359 transitions. [2022-01-31 17:44:57,259 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 359 transitions. Word has length 340 [2022-01-31 17:44:57,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:57,259 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 359 transitions. [2022-01-31 17:44:57,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.469387755102041) internal successors, (72), 48 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) [2022-01-31 17:44:57,259 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 359 transitions. [2022-01-31 17:44:57,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2022-01-31 17:44:57,260 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:57,261 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:57,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 17:44:57,261 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:57,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:57,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1806285655, now seen corresponding path program 46 times [2022-01-31 17:44:57,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:57,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1657780910] [2022-01-31 17:44:57,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:57,262 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:57,262 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:57,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:57,269 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:57,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:58,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:58,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:58,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:58,160 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:58,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1657780910] [2022-01-31 17:44:58,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1657780910] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:58,160 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:58,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 17:44:58,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607134712] [2022-01-31 17:44:58,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:58,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 17:44:58,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:58,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 17:44:58,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 17:44:58,161 INFO L87 Difference]: Start difference. First operand 352 states and 359 transitions. Second operand has 50 states, 50 states have (on average 1.46) internal successors, (73), 49 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:59,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:59,278 INFO L93 Difference]: Finished difference Result 658 states and 678 transitions. [2022-01-31 17:44:59,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 17:44:59,278 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.46) internal successors, (73), 49 states have internal predecessors, (73), 2 states have call successors, (3), 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 347 [2022-01-31 17:44:59,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:59,279 INFO L225 Difference]: With dead ends: 658 [2022-01-31 17:44:59,279 INFO L226 Difference]: Without dead ends: 359 [2022-01-31 17:44:59,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3528, Invalid=5784, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 17:44:59,281 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 1236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 1664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1236 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:59,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 56 Invalid, 1664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1236 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:44:59,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-01-31 17:44:59,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 359. [2022-01-31 17:44:59,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 353 states have (on average 1.0226628895184136) internal successors, (361), 353 states have internal predecessors, (361), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:59,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 366 transitions. [2022-01-31 17:44:59,288 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 366 transitions. Word has length 347 [2022-01-31 17:44:59,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:59,288 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 366 transitions. [2022-01-31 17:44:59,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.46) internal successors, (73), 49 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:59,288 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 366 transitions. [2022-01-31 17:44:59,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2022-01-31 17:44:59,289 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:59,289 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:59,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 17:44:59,289 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:59,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:59,290 INFO L85 PathProgramCache]: Analyzing trace with hash 801215044, now seen corresponding path program 47 times [2022-01-31 17:44:59,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:59,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1213715780] [2022-01-31 17:44:59,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:59,291 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:59,291 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:59,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:59,298 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:59,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:00,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:00,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:00,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:00,219 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:00,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1213715780] [2022-01-31 17:45:00,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1213715780] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:00,219 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:00,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-01-31 17:45:00,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791232000] [2022-01-31 17:45:00,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:00,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-31 17:45:00,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:00,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-31 17:45:00,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 17:45:00,220 INFO L87 Difference]: Start difference. First operand 359 states and 366 transitions. Second operand has 51 states, 51 states have (on average 1.4509803921568627) internal successors, (74), 50 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:01,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:01,727 INFO L93 Difference]: Finished difference Result 671 states and 691 transitions. [2022-01-31 17:45:01,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 17:45:01,728 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.4509803921568627) internal successors, (74), 50 states have internal predecessors, (74), 2 states have call successors, (3), 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 354 [2022-01-31 17:45:01,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:01,729 INFO L225 Difference]: With dead ends: 671 [2022-01-31 17:45:01,729 INFO L226 Difference]: Without dead ends: 366 [2022-01-31 17:45:01,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3675, Invalid=6027, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 17:45:01,730 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 1209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 1644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1209 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:01,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 56 Invalid, 1644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1209 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:45:01,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-01-31 17:45:01,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 366. [2022-01-31 17:45:01,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 360 states have (on average 1.0222222222222221) internal successors, (368), 360 states have internal predecessors, (368), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:01,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 373 transitions. [2022-01-31 17:45:01,739 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 373 transitions. Word has length 354 [2022-01-31 17:45:01,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:01,739 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 373 transitions. [2022-01-31 17:45:01,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.4509803921568627) internal successors, (74), 50 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:01,740 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 373 transitions. [2022-01-31 17:45:01,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2022-01-31 17:45:01,741 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:01,741 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:01,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 17:45:01,741 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:01,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:01,741 INFO L85 PathProgramCache]: Analyzing trace with hash -300812617, now seen corresponding path program 48 times [2022-01-31 17:45:01,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:01,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [318008266] [2022-01-31 17:45:01,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:01,742 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:01,742 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:01,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:01,750 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:01,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:02,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:02,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:02,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:02,667 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:02,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [318008266] [2022-01-31 17:45:02,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [318008266] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:02,668 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:02,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-01-31 17:45:02,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430721823] [2022-01-31 17:45:02,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:02,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 17:45:02,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:02,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 17:45:02,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 17:45:02,670 INFO L87 Difference]: Start difference. First operand 366 states and 373 transitions. Second operand has 52 states, 52 states have (on average 1.4423076923076923) internal successors, (75), 51 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) [2022-01-31 17:45:03,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:03,859 INFO L93 Difference]: Finished difference Result 684 states and 704 transitions. [2022-01-31 17:45:03,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 17:45:03,860 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.4423076923076923) internal successors, (75), 51 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 361 [2022-01-31 17:45:03,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:03,861 INFO L225 Difference]: With dead ends: 684 [2022-01-31 17:45:03,861 INFO L226 Difference]: Without dead ends: 373 [2022-01-31 17:45:03,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3825, Invalid=6275, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 17:45:03,862 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 1315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 1793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1315 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:03,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 66 Invalid, 1793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1315 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:45:03,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-01-31 17:45:03,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 373. [2022-01-31 17:45:03,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 367 states have (on average 1.021798365122616) internal successors, (375), 367 states have internal predecessors, (375), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:03,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 380 transitions. [2022-01-31 17:45:03,884 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 380 transitions. Word has length 361 [2022-01-31 17:45:03,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:03,884 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 380 transitions. [2022-01-31 17:45:03,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.4423076923076923) internal successors, (75), 51 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) [2022-01-31 17:45:03,884 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 380 transitions. [2022-01-31 17:45:03,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2022-01-31 17:45:03,885 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:03,885 INFO L514 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:03,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 17:45:03,885 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:03,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:03,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1897064420, now seen corresponding path program 49 times [2022-01-31 17:45:03,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:03,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [354475080] [2022-01-31 17:45:03,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:03,887 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:03,887 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:03,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:03,894 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:03,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:04,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:04,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:04,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:04,816 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:04,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [354475080] [2022-01-31 17:45:04,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [354475080] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:04,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:04,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 17:45:04,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681564448] [2022-01-31 17:45:04,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:04,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 17:45:04,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:04,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 17:45:04,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 17:45:04,817 INFO L87 Difference]: Start difference. First operand 373 states and 380 transitions. Second operand has 53 states, 53 states have (on average 1.4339622641509433) internal successors, (76), 52 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) [2022-01-31 17:45:06,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:06,293 INFO L93 Difference]: Finished difference Result 697 states and 717 transitions. [2022-01-31 17:45:06,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 17:45:06,294 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.4339622641509433) internal successors, (76), 52 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 368 [2022-01-31 17:45:06,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:06,295 INFO L225 Difference]: With dead ends: 697 [2022-01-31 17:45:06,295 INFO L226 Difference]: Without dead ends: 380 [2022-01-31 17:45:06,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 17:45:06,297 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 1639 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 2070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1639 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:06,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 51 Invalid, 2070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1639 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:45:06,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-01-31 17:45:06,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 380. [2022-01-31 17:45:06,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 374 states have (on average 1.0213903743315509) internal successors, (382), 374 states have internal predecessors, (382), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:06,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 387 transitions. [2022-01-31 17:45:06,319 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 387 transitions. Word has length 368 [2022-01-31 17:45:06,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:06,319 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 387 transitions. [2022-01-31 17:45:06,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.4339622641509433) internal successors, (76), 52 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) [2022-01-31 17:45:06,319 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 387 transitions. [2022-01-31 17:45:06,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2022-01-31 17:45:06,320 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:06,320 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:06,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 17:45:06,320 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:06,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:06,321 INFO L85 PathProgramCache]: Analyzing trace with hash -920581609, now seen corresponding path program 50 times [2022-01-31 17:45:06,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:06,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [755778103] [2022-01-31 17:45:06,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:06,322 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:06,322 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:06,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:06,335 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:06,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:07,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:07,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:07,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:07,451 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:07,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [755778103] [2022-01-31 17:45:07,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [755778103] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:07,451 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:07,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-01-31 17:45:07,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558737976] [2022-01-31 17:45:07,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:07,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 17:45:07,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:07,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 17:45:07,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 17:45:07,453 INFO L87 Difference]: Start difference. First operand 380 states and 387 transitions. Second operand has 54 states, 54 states have (on average 1.4259259259259258) internal successors, (77), 53 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) [2022-01-31 17:45:08,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:08,844 INFO L93 Difference]: Finished difference Result 710 states and 730 transitions. [2022-01-31 17:45:08,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 17:45:08,844 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.4259259259259258) internal successors, (77), 53 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 375 [2022-01-31 17:45:08,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:08,845 INFO L225 Difference]: With dead ends: 710 [2022-01-31 17:45:08,845 INFO L226 Difference]: Without dead ends: 387 [2022-01-31 17:45:08,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 17:45:08,848 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 1491 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1491 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:08,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 46 Invalid, 1911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1491 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:45:08,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-01-31 17:45:08,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 387. [2022-01-31 17:45:08,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 381 states have (on average 1.020997375328084) internal successors, (389), 381 states have internal predecessors, (389), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:08,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 394 transitions. [2022-01-31 17:45:08,859 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 394 transitions. Word has length 375 [2022-01-31 17:45:08,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:08,859 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 394 transitions. [2022-01-31 17:45:08,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.4259259259259258) internal successors, (77), 53 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) [2022-01-31 17:45:08,859 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 394 transitions. [2022-01-31 17:45:08,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2022-01-31 17:45:08,861 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:08,861 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:08,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 17:45:08,861 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:08,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:08,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1221466748, now seen corresponding path program 51 times [2022-01-31 17:45:08,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:08,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1837111433] [2022-01-31 17:45:08,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:08,863 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:08,863 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:08,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:08,872 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:08,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:09,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:09,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:09,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:09,948 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:09,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1837111433] [2022-01-31 17:45:09,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1837111433] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:09,948 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:09,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-01-31 17:45:09,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176393873] [2022-01-31 17:45:09,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:09,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 17:45:09,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:09,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 17:45:09,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 17:45:09,949 INFO L87 Difference]: Start difference. First operand 387 states and 394 transitions. Second operand has 55 states, 55 states have (on average 1.4181818181818182) internal successors, (78), 54 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) [2022-01-31 17:45:11,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:11,497 INFO L93 Difference]: Finished difference Result 723 states and 743 transitions. [2022-01-31 17:45:11,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 17:45:11,497 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.4181818181818182) internal successors, (78), 54 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 382 [2022-01-31 17:45:11,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:11,498 INFO L225 Difference]: With dead ends: 723 [2022-01-31 17:45:11,498 INFO L226 Difference]: Without dead ends: 394 [2022-01-31 17:45:11,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4293, Invalid=7049, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 17:45:11,499 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 1370 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 1851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1370 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:11,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 61 Invalid, 1851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1370 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:45:11,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-01-31 17:45:11,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 394. [2022-01-31 17:45:11,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 388 states have (on average 1.0206185567010309) internal successors, (396), 388 states have internal predecessors, (396), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:11,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 401 transitions. [2022-01-31 17:45:11,507 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 401 transitions. Word has length 382 [2022-01-31 17:45:11,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:11,507 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 401 transitions. [2022-01-31 17:45:11,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.4181818181818182) internal successors, (78), 54 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) [2022-01-31 17:45:11,507 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 401 transitions. [2022-01-31 17:45:11,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2022-01-31 17:45:11,508 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:11,509 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:11,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 17:45:11,509 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:11,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:11,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1937443465, now seen corresponding path program 52 times [2022-01-31 17:45:11,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:11,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [970067713] [2022-01-31 17:45:11,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:11,510 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:11,510 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:11,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:11,520 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:11,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:12,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:12,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:12,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:12,270 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:12,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [970067713] [2022-01-31 17:45:12,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [970067713] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:12,271 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:12,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 17:45:12,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59907832] [2022-01-31 17:45:12,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:12,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 17:45:12,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:12,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 17:45:12,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 17:45:12,273 INFO L87 Difference]: Start difference. First operand 394 states and 401 transitions. Second operand has 56 states, 56 states have (on average 1.4107142857142858) internal successors, (79), 55 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) [2022-01-31 17:45:13,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:13,754 INFO L93 Difference]: Finished difference Result 736 states and 756 transitions. [2022-01-31 17:45:13,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 17:45:13,754 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.4107142857142858) internal successors, (79), 55 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 389 [2022-01-31 17:45:13,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:13,756 INFO L225 Difference]: With dead ends: 736 [2022-01-31 17:45:13,756 INFO L226 Difference]: Without dead ends: 401 [2022-01-31 17:45:13,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=4455, Invalid=7317, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 17:45:13,757 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 1498 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1498 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:13,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 46 Invalid, 1932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1498 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:45:13,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-01-31 17:45:13,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 401. [2022-01-31 17:45:13,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 395 states have (on average 1.0202531645569621) internal successors, (403), 395 states have internal predecessors, (403), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:13,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 408 transitions. [2022-01-31 17:45:13,765 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 408 transitions. Word has length 389 [2022-01-31 17:45:13,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:13,766 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 408 transitions. [2022-01-31 17:45:13,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.4107142857142858) internal successors, (79), 55 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) [2022-01-31 17:45:13,766 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 408 transitions. [2022-01-31 17:45:13,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2022-01-31 17:45:13,767 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:13,767 INFO L514 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:13,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 17:45:13,767 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:13,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:13,767 INFO L85 PathProgramCache]: Analyzing trace with hash -651130076, now seen corresponding path program 53 times [2022-01-31 17:45:13,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:13,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [111978560] [2022-01-31 17:45:13,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:13,769 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:13,769 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:13,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:13,779 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:13,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:14,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:14,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:14,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:14,700 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:14,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [111978560] [2022-01-31 17:45:14,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [111978560] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:14,700 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:14,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-01-31 17:45:14,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563395228] [2022-01-31 17:45:14,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:14,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 17:45:14,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:14,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 17:45:14,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 17:45:14,701 INFO L87 Difference]: Start difference. First operand 401 states and 408 transitions. Second operand has 57 states, 57 states have (on average 1.4035087719298245) internal successors, (80), 56 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) [2022-01-31 17:45:16,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:16,581 INFO L93 Difference]: Finished difference Result 749 states and 769 transitions. [2022-01-31 17:45:16,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 17:45:16,581 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.4035087719298245) internal successors, (80), 56 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 396 [2022-01-31 17:45:16,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:16,582 INFO L225 Difference]: With dead ends: 749 [2022-01-31 17:45:16,582 INFO L226 Difference]: Without dead ends: 408 [2022-01-31 17:45:16,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4620, Invalid=7590, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 17:45:16,595 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 1584 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 2061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1584 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:16,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 56 Invalid, 2061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1584 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:45:16,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-01-31 17:45:16,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 408. [2022-01-31 17:45:16,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 402 states have (on average 1.0199004975124377) internal successors, (410), 402 states have internal predecessors, (410), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:16,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 415 transitions. [2022-01-31 17:45:16,603 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 415 transitions. Word has length 396 [2022-01-31 17:45:16,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:16,603 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 415 transitions. [2022-01-31 17:45:16,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.4035087719298245) internal successors, (80), 56 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) [2022-01-31 17:45:16,604 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 415 transitions. [2022-01-31 17:45:16,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2022-01-31 17:45:16,605 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:16,605 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:16,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 17:45:16,605 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:16,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:16,605 INFO L85 PathProgramCache]: Analyzing trace with hash -915687209, now seen corresponding path program 54 times [2022-01-31 17:45:16,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:16,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2121111590] [2022-01-31 17:45:16,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:16,606 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:16,606 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:16,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:16,619 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:16,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:17,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:17,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:17,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:17,650 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:17,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2121111590] [2022-01-31 17:45:17,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2121111590] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:17,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:17,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-01-31 17:45:17,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432102160] [2022-01-31 17:45:17,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:17,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 17:45:17,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:17,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 17:45:17,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 17:45:17,653 INFO L87 Difference]: Start difference. First operand 408 states and 415 transitions. Second operand has 58 states, 58 states have (on average 1.396551724137931) internal successors, (81), 57 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) [2022-01-31 17:45:19,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:19,511 INFO L93 Difference]: Finished difference Result 762 states and 782 transitions. [2022-01-31 17:45:19,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 17:45:19,512 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.396551724137931) internal successors, (81), 57 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 403 [2022-01-31 17:45:19,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:19,513 INFO L225 Difference]: With dead ends: 762 [2022-01-31 17:45:19,513 INFO L226 Difference]: Without dead ends: 415 [2022-01-31 17:45:19,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4788, Invalid=7868, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 17:45:19,516 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 1490 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1490 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:19,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 46 Invalid, 1938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1490 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:45:19,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-01-31 17:45:19,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 415. [2022-01-31 17:45:19,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 409 states have (on average 1.019559902200489) internal successors, (417), 409 states have internal predecessors, (417), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:19,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 422 transitions. [2022-01-31 17:45:19,524 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 422 transitions. Word has length 403 [2022-01-31 17:45:19,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:19,524 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 422 transitions. [2022-01-31 17:45:19,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.396551724137931) internal successors, (81), 57 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) [2022-01-31 17:45:19,524 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 422 transitions. [2022-01-31 17:45:19,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2022-01-31 17:45:19,525 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:19,525 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:19,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 17:45:19,526 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:19,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:19,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1554045124, now seen corresponding path program 55 times [2022-01-31 17:45:19,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:19,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1262075778] [2022-01-31 17:45:19,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:19,527 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:19,527 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:19,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:19,549 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:19,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:20,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:20,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:20,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:20,701 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:20,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1262075778] [2022-01-31 17:45:20,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1262075778] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:20,701 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:20,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 17:45:20,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658679059] [2022-01-31 17:45:20,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:20,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 17:45:20,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:20,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 17:45:20,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 17:45:20,703 INFO L87 Difference]: Start difference. First operand 415 states and 422 transitions. Second operand has 59 states, 59 states have (on average 1.3898305084745763) internal successors, (82), 58 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) [2022-01-31 17:45:22,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:22,604 INFO L93 Difference]: Finished difference Result 775 states and 795 transitions. [2022-01-31 17:45:22,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 17:45:22,604 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.3898305084745763) internal successors, (82), 58 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 410 [2022-01-31 17:45:22,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:22,605 INFO L225 Difference]: With dead ends: 775 [2022-01-31 17:45:22,605 INFO L226 Difference]: Without dead ends: 422 [2022-01-31 17:45:22,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4959, Invalid=8151, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 17:45:22,609 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 1782 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 2237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1782 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:22,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 46 Invalid, 2237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1782 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:45:22,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-01-31 17:45:22,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 422. [2022-01-31 17:45:22,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 416 states have (on average 1.0192307692307692) internal successors, (424), 416 states have internal predecessors, (424), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:22,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 429 transitions. [2022-01-31 17:45:22,617 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 429 transitions. Word has length 410 [2022-01-31 17:45:22,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:22,617 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 429 transitions. [2022-01-31 17:45:22,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.3898305084745763) internal successors, (82), 58 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) [2022-01-31 17:45:22,618 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 429 transitions. [2022-01-31 17:45:22,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2022-01-31 17:45:22,619 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:22,619 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:22,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 17:45:22,619 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:22,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:22,619 INFO L85 PathProgramCache]: Analyzing trace with hash -226274249, now seen corresponding path program 56 times [2022-01-31 17:45:22,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:22,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734975587] [2022-01-31 17:45:22,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:22,621 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:22,621 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:22,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:22,631 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:22,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:23,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:23,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:23,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:23,646 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:23,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734975587] [2022-01-31 17:45:23,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1734975587] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:23,647 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:23,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-01-31 17:45:23,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035503017] [2022-01-31 17:45:23,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:23,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 17:45:23,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:23,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 17:45:23,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 17:45:23,648 INFO L87 Difference]: Start difference. First operand 422 states and 429 transitions. Second operand has 60 states, 60 states have (on average 1.3833333333333333) internal successors, (83), 59 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) [2022-01-31 17:45:25,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:25,191 INFO L93 Difference]: Finished difference Result 788 states and 808 transitions. [2022-01-31 17:45:25,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 17:45:25,191 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.3833333333333333) internal successors, (83), 59 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 417 [2022-01-31 17:45:25,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:25,192 INFO L225 Difference]: With dead ends: 788 [2022-01-31 17:45:25,192 INFO L226 Difference]: Without dead ends: 429 [2022-01-31 17:45:25,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=5133, Invalid=8439, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 17:45:25,194 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 1816 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 2314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1816 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:25,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 56 Invalid, 2314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1816 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:45:25,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-01-31 17:45:25,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 429. [2022-01-31 17:45:25,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 423 states have (on average 1.0189125295508275) internal successors, (431), 423 states have internal predecessors, (431), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:25,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 436 transitions. [2022-01-31 17:45:25,202 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 436 transitions. Word has length 417 [2022-01-31 17:45:25,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:25,202 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 436 transitions. [2022-01-31 17:45:25,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.3833333333333333) internal successors, (83), 59 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) [2022-01-31 17:45:25,202 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 436 transitions. [2022-01-31 17:45:25,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2022-01-31 17:45:25,203 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:25,203 INFO L514 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:25,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 17:45:25,204 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:25,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:25,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1785409948, now seen corresponding path program 57 times [2022-01-31 17:45:25,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:25,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1361122547] [2022-01-31 17:45:25,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:25,205 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:25,205 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:25,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:25,215 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:25,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:26,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:26,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:26,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:26,558 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:26,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1361122547] [2022-01-31 17:45:26,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1361122547] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:26,558 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:26,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-01-31 17:45:26,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983292989] [2022-01-31 17:45:26,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:26,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-31 17:45:26,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:26,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-31 17:45:26,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 17:45:26,560 INFO L87 Difference]: Start difference. First operand 429 states and 436 transitions. Second operand has 61 states, 61 states have (on average 1.3770491803278688) internal successors, (84), 60 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) [2022-01-31 17:45:28,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:28,525 INFO L93 Difference]: Finished difference Result 801 states and 821 transitions. [2022-01-31 17:45:28,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 17:45:28,525 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.3770491803278688) internal successors, (84), 60 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 424 [2022-01-31 17:45:28,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:28,526 INFO L225 Difference]: With dead ends: 801 [2022-01-31 17:45:28,526 INFO L226 Difference]: Without dead ends: 436 [2022-01-31 17:45:28,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5310, Invalid=8732, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 17:45:28,528 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 1497 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 2056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1497 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:28,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 71 Invalid, 2056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1497 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:45:28,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2022-01-31 17:45:28,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 436. [2022-01-31 17:45:28,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 430 states have (on average 1.0186046511627906) internal successors, (438), 430 states have internal predecessors, (438), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:28,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 443 transitions. [2022-01-31 17:45:28,537 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 443 transitions. Word has length 424 [2022-01-31 17:45:28,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:28,537 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 443 transitions. [2022-01-31 17:45:28,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.3770491803278688) internal successors, (84), 60 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) [2022-01-31 17:45:28,537 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 443 transitions. [2022-01-31 17:45:28,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2022-01-31 17:45:28,539 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:28,539 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:28,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 17:45:28,539 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:28,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:28,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1006225303, now seen corresponding path program 58 times [2022-01-31 17:45:28,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:28,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [607762557] [2022-01-31 17:45:28,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:28,541 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:28,541 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:28,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:28,555 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:28,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:29,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:29,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:29,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:29,806 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:29,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [607762557] [2022-01-31 17:45:29,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [607762557] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:29,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:29,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 17:45:29,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801206150] [2022-01-31 17:45:29,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:29,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 17:45:29,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:29,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 17:45:29,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 17:45:29,808 INFO L87 Difference]: Start difference. First operand 436 states and 443 transitions. Second operand has 62 states, 62 states have (on average 1.3709677419354838) internal successors, (85), 61 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) [2022-01-31 17:45:31,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:31,421 INFO L93 Difference]: Finished difference Result 814 states and 834 transitions. [2022-01-31 17:45:31,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 17:45:31,421 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.3709677419354838) internal successors, (85), 61 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 431 [2022-01-31 17:45:31,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:31,422 INFO L225 Difference]: With dead ends: 814 [2022-01-31 17:45:31,422 INFO L226 Difference]: Without dead ends: 443 [2022-01-31 17:45:31,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=5490, Invalid=9030, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 17:45:31,424 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 1864 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 2358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1864 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:31,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 51 Invalid, 2358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1864 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:45:31,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-01-31 17:45:31,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 443. [2022-01-31 17:45:31,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 437 states have (on average 1.0183066361556063) internal successors, (445), 437 states have internal predecessors, (445), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:31,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 450 transitions. [2022-01-31 17:45:31,432 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 450 transitions. Word has length 431 [2022-01-31 17:45:31,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:31,432 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 450 transitions. [2022-01-31 17:45:31,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.3709677419354838) internal successors, (85), 61 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) [2022-01-31 17:45:31,433 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 450 transitions. [2022-01-31 17:45:31,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-01-31 17:45:31,434 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:31,434 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:31,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 17:45:31,434 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:31,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:31,434 INFO L85 PathProgramCache]: Analyzing trace with hash -962696188, now seen corresponding path program 59 times [2022-01-31 17:45:31,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:31,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2015590805] [2022-01-31 17:45:31,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:31,436 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:31,436 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:31,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:31,448 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:31,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:32,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:32,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:32,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:32,390 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:32,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2015590805] [2022-01-31 17:45:32,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2015590805] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:32,391 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:32,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-01-31 17:45:32,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475774629] [2022-01-31 17:45:32,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:32,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 17:45:32,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:32,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 17:45:32,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 17:45:32,392 INFO L87 Difference]: Start difference. First operand 443 states and 450 transitions. Second operand has 63 states, 63 states have (on average 1.3650793650793651) internal successors, (86), 62 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:34,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:34,004 INFO L93 Difference]: Finished difference Result 827 states and 847 transitions. [2022-01-31 17:45:34,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 17:45:34,004 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.3650793650793651) internal successors, (86), 62 states have internal predecessors, (86), 2 states have call successors, (3), 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 438 [2022-01-31 17:45:34,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:34,005 INFO L225 Difference]: With dead ends: 827 [2022-01-31 17:45:34,005 INFO L226 Difference]: Without dead ends: 450 [2022-01-31 17:45:34,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=5673, Invalid=9333, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 17:45:34,006 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 1844 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 2345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1844 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:34,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 51 Invalid, 2345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1844 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:45:34,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2022-01-31 17:45:34,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 450. [2022-01-31 17:45:34,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 444 states have (on average 1.018018018018018) internal successors, (452), 444 states have internal predecessors, (452), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:34,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 457 transitions. [2022-01-31 17:45:34,015 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 457 transitions. Word has length 438 [2022-01-31 17:45:34,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:34,015 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 457 transitions. [2022-01-31 17:45:34,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.3650793650793651) internal successors, (86), 62 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:34,015 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 457 transitions. [2022-01-31 17:45:34,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 446 [2022-01-31 17:45:34,016 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:34,016 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:34,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 17:45:34,016 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:34,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:34,017 INFO L85 PathProgramCache]: Analyzing trace with hash 2071794423, now seen corresponding path program 60 times [2022-01-31 17:45:34,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:34,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1027937996] [2022-01-31 17:45:34,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:34,018 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:34,018 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:34,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:34,031 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:34,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:35,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:35,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:35,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:35,171 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:35,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1027937996] [2022-01-31 17:45:35,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1027937996] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:35,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:35,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-01-31 17:45:35,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811875352] [2022-01-31 17:45:35,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:35,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-31 17:45:35,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:35,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-31 17:45:35,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 17:45:35,172 INFO L87 Difference]: Start difference. First operand 450 states and 457 transitions. Second operand has 64 states, 64 states have (on average 1.359375) internal successors, (87), 63 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:36,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:36,873 INFO L93 Difference]: Finished difference Result 840 states and 860 transitions. [2022-01-31 17:45:36,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 17:45:36,874 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.359375) internal successors, (87), 63 states have internal predecessors, (87), 2 states have call successors, (3), 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 445 [2022-01-31 17:45:36,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:36,875 INFO L225 Difference]: With dead ends: 840 [2022-01-31 17:45:36,875 INFO L226 Difference]: Without dead ends: 457 [2022-01-31 17:45:36,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1890 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=5859, Invalid=9641, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 17:45:36,889 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 1955 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 2499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1955 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:36,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 61 Invalid, 2499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1955 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:45:36,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-01-31 17:45:36,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 457. [2022-01-31 17:45:36,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 451 states have (on average 1.017738359201774) internal successors, (459), 451 states have internal predecessors, (459), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:36,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 464 transitions. [2022-01-31 17:45:36,915 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 464 transitions. Word has length 445 [2022-01-31 17:45:36,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:36,915 INFO L470 AbstractCegarLoop]: Abstraction has 457 states and 464 transitions. [2022-01-31 17:45:36,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.359375) internal successors, (87), 63 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:36,917 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 464 transitions. [2022-01-31 17:45:36,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2022-01-31 17:45:36,936 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:36,937 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:36,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 17:45:36,937 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:36,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:36,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1087353252, now seen corresponding path program 61 times [2022-01-31 17:45:36,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:36,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [615632796] [2022-01-31 17:45:36,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:36,938 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:36,938 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:36,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:36,955 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:37,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:38,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:38,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:38,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:38,401 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:38,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [615632796] [2022-01-31 17:45:38,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [615632796] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:38,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:38,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 17:45:38,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581725620] [2022-01-31 17:45:38,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:38,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 17:45:38,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:38,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 17:45:38,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 17:45:38,402 INFO L87 Difference]: Start difference. First operand 457 states and 464 transitions. Second operand has 65 states, 65 states have (on average 1.353846153846154) internal successors, (88), 64 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) [2022-01-31 17:45:40,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:40,139 INFO L93 Difference]: Finished difference Result 853 states and 873 transitions. [2022-01-31 17:45:40,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 17:45:40,140 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.353846153846154) internal successors, (88), 64 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 452 [2022-01-31 17:45:40,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:40,141 INFO L225 Difference]: With dead ends: 853 [2022-01-31 17:45:40,141 INFO L226 Difference]: Without dead ends: 464 [2022-01-31 17:45:40,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=6048, Invalid=9954, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 17:45:40,142 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 1635 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 2204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1635 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:40,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 66 Invalid, 2204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1635 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:45:40,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2022-01-31 17:45:40,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 464. [2022-01-31 17:45:40,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 458 states have (on average 1.017467248908297) internal successors, (466), 458 states have internal predecessors, (466), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:40,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 471 transitions. [2022-01-31 17:45:40,151 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 471 transitions. Word has length 452 [2022-01-31 17:45:40,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:40,151 INFO L470 AbstractCegarLoop]: Abstraction has 464 states and 471 transitions. [2022-01-31 17:45:40,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.353846153846154) internal successors, (88), 64 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) [2022-01-31 17:45:40,152 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 471 transitions. [2022-01-31 17:45:40,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2022-01-31 17:45:40,154 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:40,154 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:40,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 17:45:40,154 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:40,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:40,154 INFO L85 PathProgramCache]: Analyzing trace with hash 138098263, now seen corresponding path program 62 times [2022-01-31 17:45:40,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:40,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1943246684] [2022-01-31 17:45:40,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:40,155 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:40,155 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:40,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:40,171 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:40,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:41,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:41,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:41,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:41,319 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:41,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1943246684] [2022-01-31 17:45:41,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1943246684] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:41,319 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:41,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-01-31 17:45:41,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912491406] [2022-01-31 17:45:41,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:41,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 17:45:41,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:41,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 17:45:41,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 17:45:41,321 INFO L87 Difference]: Start difference. First operand 464 states and 471 transitions. Second operand has 66 states, 66 states have (on average 1.3484848484848484) internal successors, (89), 65 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) [2022-01-31 17:45:43,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:43,668 INFO L93 Difference]: Finished difference Result 866 states and 886 transitions. [2022-01-31 17:45:43,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 17:45:43,669 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.3484848484848484) internal successors, (89), 65 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 459 [2022-01-31 17:45:43,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:43,671 INFO L225 Difference]: With dead ends: 866 [2022-01-31 17:45:43,671 INFO L226 Difference]: Without dead ends: 471 [2022-01-31 17:45:43,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2015 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=6240, Invalid=10272, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 17:45:43,672 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 2171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 2657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2171 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:43,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 2657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2171 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:45:43,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-01-31 17:45:43,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 471. [2022-01-31 17:45:43,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 465 states have (on average 1.0172043010752687) internal successors, (473), 465 states have internal predecessors, (473), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:43,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 478 transitions. [2022-01-31 17:45:43,690 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 478 transitions. Word has length 459 [2022-01-31 17:45:43,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:43,690 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 478 transitions. [2022-01-31 17:45:43,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.3484848484848484) internal successors, (89), 65 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) [2022-01-31 17:45:43,690 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 478 transitions. [2022-01-31 17:45:43,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2022-01-31 17:45:43,692 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:43,692 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:43,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 17:45:43,692 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:43,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:43,692 INFO L85 PathProgramCache]: Analyzing trace with hash -2084921532, now seen corresponding path program 63 times [2022-01-31 17:45:43,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:43,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [742982419] [2022-01-31 17:45:43,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:43,694 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:43,694 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:43,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:43,708 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:43,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:44,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:44,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:44,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:44,754 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:44,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [742982419] [2022-01-31 17:45:44,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [742982419] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:44,754 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:44,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-01-31 17:45:44,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909888359] [2022-01-31 17:45:44,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:44,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 17:45:44,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:44,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 17:45:44,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 17:45:44,756 INFO L87 Difference]: Start difference. First operand 471 states and 478 transitions. Second operand has 67 states, 67 states have (on average 1.3432835820895523) internal successors, (90), 66 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) [2022-01-31 17:45:46,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:46,805 INFO L93 Difference]: Finished difference Result 879 states and 899 transitions. [2022-01-31 17:45:46,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 17:45:46,806 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.3432835820895523) internal successors, (90), 66 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 466 [2022-01-31 17:45:46,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:46,807 INFO L225 Difference]: With dead ends: 879 [2022-01-31 17:45:46,807 INFO L226 Difference]: Without dead ends: 478 [2022-01-31 17:45:46,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2079 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=6435, Invalid=10595, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 17:45:46,810 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 1847 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 2394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1847 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:46,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 56 Invalid, 2394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1847 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:45:46,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2022-01-31 17:45:46,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 478. [2022-01-31 17:45:46,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 472 states have (on average 1.0169491525423728) internal successors, (480), 472 states have internal predecessors, (480), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:46,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 485 transitions. [2022-01-31 17:45:46,819 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 485 transitions. Word has length 466 [2022-01-31 17:45:46,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:46,819 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 485 transitions. [2022-01-31 17:45:46,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.3432835820895523) internal successors, (90), 66 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) [2022-01-31 17:45:46,819 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 485 transitions. [2022-01-31 17:45:46,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2022-01-31 17:45:46,821 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:46,821 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:46,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 17:45:46,821 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:46,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:46,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1696452169, now seen corresponding path program 64 times [2022-01-31 17:45:46,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:46,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [871155673] [2022-01-31 17:45:46,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:46,825 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:46,825 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:46,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:46,839 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:46,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:48,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:48,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:48,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:48,095 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:48,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [871155673] [2022-01-31 17:45:48,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [871155673] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:48,095 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:48,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 17:45:48,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358177368] [2022-01-31 17:45:48,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:48,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 17:45:48,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:48,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 17:45:48,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 17:45:48,097 INFO L87 Difference]: Start difference. First operand 478 states and 485 transitions. Second operand has 68 states, 68 states have (on average 1.338235294117647) internal successors, (91), 67 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) [2022-01-31 17:45:50,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:50,176 INFO L93 Difference]: Finished difference Result 892 states and 912 transitions. [2022-01-31 17:45:50,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 17:45:50,176 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.338235294117647) internal successors, (91), 67 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 473 [2022-01-31 17:45:50,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:50,178 INFO L225 Difference]: With dead ends: 892 [2022-01-31 17:45:50,178 INFO L226 Difference]: Without dead ends: 485 [2022-01-31 17:45:50,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2144 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=6633, Invalid=10923, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 17:45:50,179 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 1636 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 2226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1636 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:50,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 66 Invalid, 2226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1636 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:45:50,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-01-31 17:45:50,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 485. [2022-01-31 17:45:50,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 479 states have (on average 1.0167014613778707) internal successors, (487), 479 states have internal predecessors, (487), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:50,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 492 transitions. [2022-01-31 17:45:50,197 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 492 transitions. Word has length 473 [2022-01-31 17:45:50,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:50,197 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 492 transitions. [2022-01-31 17:45:50,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.338235294117647) internal successors, (91), 67 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) [2022-01-31 17:45:50,197 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 492 transitions. [2022-01-31 17:45:50,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2022-01-31 17:45:50,210 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:50,210 INFO L514 BasicCegarLoop]: trace histogram [65, 65, 65, 65, 65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:50,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 17:45:50,210 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:50,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:50,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1567700196, now seen corresponding path program 65 times [2022-01-31 17:45:50,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:50,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [580380001] [2022-01-31 17:45:50,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:50,211 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:50,212 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:50,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:50,225 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:50,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:51,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:51,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:51,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:51,536 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:51,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [580380001] [2022-01-31 17:45:51,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [580380001] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:51,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:51,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-01-31 17:45:51,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497912460] [2022-01-31 17:45:51,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:51,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 17:45:51,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:51,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 17:45:51,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 17:45:51,538 INFO L87 Difference]: Start difference. First operand 485 states and 492 transitions. Second operand has 69 states, 69 states have (on average 1.3333333333333333) internal successors, (92), 68 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) [2022-01-31 17:45:53,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:53,708 INFO L93 Difference]: Finished difference Result 905 states and 925 transitions. [2022-01-31 17:45:53,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 17:45:53,708 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.3333333333333333) internal successors, (92), 68 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 480 [2022-01-31 17:45:53,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:53,709 INFO L225 Difference]: With dead ends: 905 [2022-01-31 17:45:53,710 INFO L226 Difference]: Without dead ends: 492 [2022-01-31 17:45:53,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2210 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=6834, Invalid=11256, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 17:45:53,711 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 1937 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 2462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1937 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:53,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 46 Invalid, 2462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1937 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:45:53,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-01-31 17:45:53,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 492. [2022-01-31 17:45:53,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 486 states have (on average 1.0164609053497942) internal successors, (494), 486 states have internal predecessors, (494), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:53,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 499 transitions. [2022-01-31 17:45:53,720 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 499 transitions. Word has length 480 [2022-01-31 17:45:53,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:53,720 INFO L470 AbstractCegarLoop]: Abstraction has 492 states and 499 transitions. [2022-01-31 17:45:53,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.3333333333333333) internal successors, (92), 68 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) [2022-01-31 17:45:53,720 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 499 transitions. [2022-01-31 17:45:53,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2022-01-31 17:45:53,721 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:53,721 INFO L514 BasicCegarLoop]: trace histogram [66, 66, 66, 66, 66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:53,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 17:45:53,722 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:53,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:53,722 INFO L85 PathProgramCache]: Analyzing trace with hash 765461783, now seen corresponding path program 66 times [2022-01-31 17:45:53,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:53,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [374245118] [2022-01-31 17:45:53,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:53,723 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:53,723 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:53,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:53,737 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:53,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:55,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:55,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:55,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:55,084 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:55,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [374245118] [2022-01-31 17:45:55,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [374245118] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:55,085 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:55,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-01-31 17:45:55,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556957887] [2022-01-31 17:45:55,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:55,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-31 17:45:55,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:55,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-31 17:45:55,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 17:45:55,087 INFO L87 Difference]: Start difference. First operand 492 states and 499 transitions. Second operand has 70 states, 70 states have (on average 1.3285714285714285) internal successors, (93), 69 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) [2022-01-31 17:45:57,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:57,396 INFO L93 Difference]: Finished difference Result 918 states and 938 transitions. [2022-01-31 17:45:57,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 17:45:57,396 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.3285714285714285) internal successors, (93), 69 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 487 [2022-01-31 17:45:57,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:57,397 INFO L225 Difference]: With dead ends: 918 [2022-01-31 17:45:57,397 INFO L226 Difference]: Without dead ends: 499 [2022-01-31 17:45:57,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2277 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=7038, Invalid=11594, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 17:45:57,399 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 2121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 2635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2121 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:57,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 2635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2121 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:45:57,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-01-31 17:45:57,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 499. [2022-01-31 17:45:57,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 493 states have (on average 1.0162271805273835) internal successors, (501), 493 states have internal predecessors, (501), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:57,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 506 transitions. [2022-01-31 17:45:57,408 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 506 transitions. Word has length 487 [2022-01-31 17:45:57,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:57,408 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 506 transitions. [2022-01-31 17:45:57,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.3285714285714285) internal successors, (93), 69 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) [2022-01-31 17:45:57,408 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 506 transitions. [2022-01-31 17:45:57,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2022-01-31 17:45:57,410 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:57,410 INFO L514 BasicCegarLoop]: trace histogram [67, 67, 67, 67, 67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:57,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 17:45:57,410 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:57,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:57,410 INFO L85 PathProgramCache]: Analyzing trace with hash 176517764, now seen corresponding path program 67 times [2022-01-31 17:45:57,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:57,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [459587] [2022-01-31 17:45:57,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:57,411 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:57,411 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:57,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:57,425 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:57,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:58,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:58,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:58,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:58,991 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:58,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [459587] [2022-01-31 17:45:58,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [459587] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:58,991 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:58,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 17:45:58,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747778817] [2022-01-31 17:45:58,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:58,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 17:45:58,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:58,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 17:45:58,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 17:45:58,993 INFO L87 Difference]: Start difference. First operand 499 states and 506 transitions. Second operand has 71 states, 71 states have (on average 1.323943661971831) internal successors, (94), 70 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) [2022-01-31 17:46:00,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:00,964 INFO L93 Difference]: Finished difference Result 931 states and 951 transitions. [2022-01-31 17:46:00,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 17:46:00,965 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.323943661971831) internal successors, (94), 70 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 494 [2022-01-31 17:46:00,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:00,966 INFO L225 Difference]: With dead ends: 931 [2022-01-31 17:46:00,966 INFO L226 Difference]: Without dead ends: 506 [2022-01-31 17:46:00,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=7245, Invalid=11937, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 17:46:00,967 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 1975 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 2532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1975 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:00,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 51 Invalid, 2532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1975 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:46:00,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-01-31 17:46:00,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 506. [2022-01-31 17:46:00,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 500 states have (on average 1.016) internal successors, (508), 500 states have internal predecessors, (508), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:00,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 513 transitions. [2022-01-31 17:46:00,976 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 513 transitions. Word has length 494 [2022-01-31 17:46:00,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:00,977 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 513 transitions. [2022-01-31 17:46:00,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.323943661971831) internal successors, (94), 70 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) [2022-01-31 17:46:00,977 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 513 transitions. [2022-01-31 17:46:00,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2022-01-31 17:46:00,978 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:00,978 INFO L514 BasicCegarLoop]: trace histogram [68, 68, 68, 68, 68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:00,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 17:46:00,978 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:00,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:00,979 INFO L85 PathProgramCache]: Analyzing trace with hash -601706377, now seen corresponding path program 68 times [2022-01-31 17:46:00,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:00,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1776279798] [2022-01-31 17:46:00,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:00,980 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:00,980 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:00,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:00,994 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:01,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:02,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:02,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:02,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:02,153 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:02,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1776279798] [2022-01-31 17:46:02,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1776279798] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:02,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:02,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-01-31 17:46:02,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301486936] [2022-01-31 17:46:02,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:02,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-01-31 17:46:02,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:02,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-01-31 17:46:02,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 17:46:02,154 INFO L87 Difference]: Start difference. First operand 506 states and 513 transitions. Second operand has 72 states, 72 states have (on average 1.3194444444444444) internal successors, (95), 71 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) [2022-01-31 17:46:04,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:04,957 INFO L93 Difference]: Finished difference Result 944 states and 964 transitions. [2022-01-31 17:46:04,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 17:46:04,957 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.3194444444444444) internal successors, (95), 71 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 501 [2022-01-31 17:46:04,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:04,958 INFO L225 Difference]: With dead ends: 944 [2022-01-31 17:46:04,958 INFO L226 Difference]: Without dead ends: 513 [2022-01-31 17:46:04,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2414 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=7455, Invalid=12285, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 17:46:04,959 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 1714 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 2368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1714 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:04,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 76 Invalid, 2368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1714 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:46:04,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-01-31 17:46:04,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 513. [2022-01-31 17:46:04,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 507 states have (on average 1.0157790927021697) internal successors, (515), 507 states have internal predecessors, (515), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:04,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 520 transitions. [2022-01-31 17:46:04,969 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 520 transitions. Word has length 501 [2022-01-31 17:46:04,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:04,969 INFO L470 AbstractCegarLoop]: Abstraction has 513 states and 520 transitions. [2022-01-31 17:46:04,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.3194444444444444) internal successors, (95), 71 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) [2022-01-31 17:46:04,969 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 520 transitions. [2022-01-31 17:46:04,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2022-01-31 17:46:04,970 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:04,971 INFO L514 BasicCegarLoop]: trace histogram [69, 69, 69, 69, 69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:04,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 17:46:04,971 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:04,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:04,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1443452964, now seen corresponding path program 69 times [2022-01-31 17:46:04,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:04,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1873860638] [2022-01-31 17:46:04,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:04,972 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:04,972 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:04,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:04,987 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:05,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:06,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:06,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:06,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:06,859 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:06,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1873860638] [2022-01-31 17:46:06,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1873860638] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:06,860 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:06,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 17:46:06,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964287136] [2022-01-31 17:46:06,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:06,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 17:46:06,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:06,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 17:46:06,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 17:46:06,861 INFO L87 Difference]: Start difference. First operand 513 states and 520 transitions. Second operand has 73 states, 73 states have (on average 1.3150684931506849) internal successors, (96), 72 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) [2022-01-31 17:46:09,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:09,604 INFO L93 Difference]: Finished difference Result 957 states and 977 transitions. [2022-01-31 17:46:09,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 17:46:09,605 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.3150684931506849) internal successors, (96), 72 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 508 [2022-01-31 17:46:09,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:09,606 INFO L225 Difference]: With dead ends: 957 [2022-01-31 17:46:09,606 INFO L226 Difference]: Without dead ends: 520 [2022-01-31 17:46:09,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2484 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=7668, Invalid=12638, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 17:46:09,608 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 1897 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 2504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1897 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:09,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 61 Invalid, 2504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1897 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:46:09,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-01-31 17:46:09,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 520. [2022-01-31 17:46:09,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 514 states have (on average 1.0155642023346303) internal successors, (522), 514 states have internal predecessors, (522), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:09,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 527 transitions. [2022-01-31 17:46:09,618 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 527 transitions. Word has length 508 [2022-01-31 17:46:09,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:09,618 INFO L470 AbstractCegarLoop]: Abstraction has 520 states and 527 transitions. [2022-01-31 17:46:09,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.3150684931506849) internal successors, (96), 72 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) [2022-01-31 17:46:09,618 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 527 transitions. [2022-01-31 17:46:09,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2022-01-31 17:46:09,620 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:09,620 INFO L514 BasicCegarLoop]: trace histogram [70, 70, 70, 70, 70, 70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:09,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 17:46:09,620 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:09,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:09,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1013435433, now seen corresponding path program 70 times [2022-01-31 17:46:09,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:09,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1405126491] [2022-01-31 17:46:09,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:09,622 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:09,622 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:09,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:09,637 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:09,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:11,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:11,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:11,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:11,245 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:11,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1405126491] [2022-01-31 17:46:11,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1405126491] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:11,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:11,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-01-31 17:46:11,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998590731] [2022-01-31 17:46:11,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:11,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 17:46:11,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:11,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 17:46:11,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 17:46:11,246 INFO L87 Difference]: Start difference. First operand 520 states and 527 transitions. Second operand has 74 states, 74 states have (on average 1.3108108108108107) internal successors, (97), 73 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) [2022-01-31 17:46:14,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:14,010 INFO L93 Difference]: Finished difference Result 970 states and 990 transitions. [2022-01-31 17:46:14,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 17:46:14,011 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.3108108108108107) internal successors, (97), 73 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 515 [2022-01-31 17:46:14,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:14,012 INFO L225 Difference]: With dead ends: 970 [2022-01-31 17:46:14,012 INFO L226 Difference]: Without dead ends: 527 [2022-01-31 17:46:14,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2555 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=7884, Invalid=12996, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 17:46:14,014 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 2065 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 2607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2065 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:14,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 2607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2065 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:46:14,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-01-31 17:46:14,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 527. [2022-01-31 17:46:14,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 521 states have (on average 1.0153550863723608) internal successors, (529), 521 states have internal predecessors, (529), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:14,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 534 transitions. [2022-01-31 17:46:14,026 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 534 transitions. Word has length 515 [2022-01-31 17:46:14,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:14,026 INFO L470 AbstractCegarLoop]: Abstraction has 527 states and 534 transitions. [2022-01-31 17:46:14,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.3108108108108107) internal successors, (97), 73 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) [2022-01-31 17:46:14,026 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 534 transitions. [2022-01-31 17:46:14,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2022-01-31 17:46:14,027 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:14,028 INFO L514 BasicCegarLoop]: trace histogram [71, 71, 71, 71, 71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:14,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 17:46:14,028 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:14,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:14,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1181817404, now seen corresponding path program 71 times [2022-01-31 17:46:14,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:14,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1379906308] [2022-01-31 17:46:14,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:14,029 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:14,029 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:14,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:14,044 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:14,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:15,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:15,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:15,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:15,876 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:15,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1379906308] [2022-01-31 17:46:15,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1379906308] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:15,877 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:15,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-01-31 17:46:15,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059106500] [2022-01-31 17:46:15,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:15,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 17:46:15,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:15,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 17:46:15,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 17:46:15,879 INFO L87 Difference]: Start difference. First operand 527 states and 534 transitions. Second operand has 75 states, 75 states have (on average 1.3066666666666666) internal successors, (98), 74 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) [2022-01-31 17:46:18,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:18,580 INFO L93 Difference]: Finished difference Result 983 states and 1003 transitions. [2022-01-31 17:46:18,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 17:46:18,581 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.3066666666666666) internal successors, (98), 74 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 522 [2022-01-31 17:46:18,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:18,582 INFO L225 Difference]: With dead ends: 983 [2022-01-31 17:46:18,582 INFO L226 Difference]: Without dead ends: 534 [2022-01-31 17:46:18,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2627 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=8103, Invalid=13359, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 17:46:18,583 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 2114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 2699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2114 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:18,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 51 Invalid, 2699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2114 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:46:18,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2022-01-31 17:46:18,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 534. [2022-01-31 17:46:18,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 528 states have (on average 1.0151515151515151) internal successors, (536), 528 states have internal predecessors, (536), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:18,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 541 transitions. [2022-01-31 17:46:18,593 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 541 transitions. Word has length 522 [2022-01-31 17:46:18,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:18,594 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 541 transitions. [2022-01-31 17:46:18,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.3066666666666666) internal successors, (98), 74 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) [2022-01-31 17:46:18,594 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 541 transitions. [2022-01-31 17:46:18,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 530 [2022-01-31 17:46:18,596 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:18,596 INFO L514 BasicCegarLoop]: trace histogram [72, 72, 72, 72, 72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:18,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 17:46:18,596 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:18,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:18,596 INFO L85 PathProgramCache]: Analyzing trace with hash -491876553, now seen corresponding path program 72 times [2022-01-31 17:46:18,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:18,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [648297704] [2022-01-31 17:46:18,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:18,597 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:18,597 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:18,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:18,616 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:18,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:20,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:20,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:20,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:20,167 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:20,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [648297704] [2022-01-31 17:46:20,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [648297704] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:20,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:20,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-01-31 17:46:20,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554960084] [2022-01-31 17:46:20,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:20,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-31 17:46:20,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:20,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-31 17:46:20,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 17:46:20,173 INFO L87 Difference]: Start difference. First operand 534 states and 541 transitions. Second operand has 76 states, 76 states have (on average 1.3026315789473684) internal successors, (99), 75 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:22,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:22,367 INFO L93 Difference]: Finished difference Result 996 states and 1016 transitions. [2022-01-31 17:46:22,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-31 17:46:22,368 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.3026315789473684) internal successors, (99), 75 states have internal predecessors, (99), 2 states have call successors, (3), 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 529 [2022-01-31 17:46:22,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:22,369 INFO L225 Difference]: With dead ends: 996 [2022-01-31 17:46:22,369 INFO L226 Difference]: Without dead ends: 541 [2022-01-31 17:46:22,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2700 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=8325, Invalid=13727, Unknown=0, NotChecked=0, Total=22052 [2022-01-31 17:46:22,370 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 1910 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 2502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1910 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:22,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 51 Invalid, 2502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1910 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:46:22,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2022-01-31 17:46:22,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 541. [2022-01-31 17:46:22,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 535 states have (on average 1.0149532710280373) internal successors, (543), 535 states have internal predecessors, (543), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:22,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 548 transitions. [2022-01-31 17:46:22,380 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 548 transitions. Word has length 529 [2022-01-31 17:46:22,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:22,380 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 548 transitions. [2022-01-31 17:46:22,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.3026315789473684) internal successors, (99), 75 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:22,380 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 548 transitions. [2022-01-31 17:46:22,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 537 [2022-01-31 17:46:22,382 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:22,382 INFO L514 BasicCegarLoop]: trace histogram [73, 73, 73, 73, 73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:22,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 17:46:22,382 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:22,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:22,382 INFO L85 PathProgramCache]: Analyzing trace with hash 2099780452, now seen corresponding path program 73 times [2022-01-31 17:46:22,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:22,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1770615644] [2022-01-31 17:46:22,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:22,383 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:22,383 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:22,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:22,402 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:22,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:24,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:24,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:24,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:24,125 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:24,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1770615644] [2022-01-31 17:46:24,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1770615644] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:24,126 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:24,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 17:46:24,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74206981] [2022-01-31 17:46:24,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:24,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 17:46:24,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:24,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 17:46:24,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 17:46:24,127 INFO L87 Difference]: Start difference. First operand 541 states and 548 transitions. Second operand has 77 states, 77 states have (on average 1.2987012987012987) internal successors, (100), 76 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:26,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:26,346 INFO L93 Difference]: Finished difference Result 1009 states and 1029 transitions. [2022-01-31 17:46:26,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 17:46:26,346 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.2987012987012987) internal successors, (100), 76 states have internal predecessors, (100), 2 states have call successors, (3), 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 536 [2022-01-31 17:46:26,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:26,347 INFO L225 Difference]: With dead ends: 1009 [2022-01-31 17:46:26,347 INFO L226 Difference]: Without dead ends: 548 [2022-01-31 17:46:26,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2774 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=8550, Invalid=14100, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 17:46:26,349 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 2043 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 2624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2043 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:26,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 46 Invalid, 2624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2043 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:46:26,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2022-01-31 17:46:26,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 548. [2022-01-31 17:46:26,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 542 states have (on average 1.014760147601476) internal successors, (550), 542 states have internal predecessors, (550), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:26,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 555 transitions. [2022-01-31 17:46:26,376 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 555 transitions. Word has length 536 [2022-01-31 17:46:26,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:26,376 INFO L470 AbstractCegarLoop]: Abstraction has 548 states and 555 transitions. [2022-01-31 17:46:26,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.2987012987012987) internal successors, (100), 76 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:26,376 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 555 transitions. [2022-01-31 17:46:26,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 544 [2022-01-31 17:46:26,378 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:26,378 INFO L514 BasicCegarLoop]: trace histogram [74, 74, 74, 74, 74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:26,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 17:46:26,385 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:26,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:26,385 INFO L85 PathProgramCache]: Analyzing trace with hash -107756905, now seen corresponding path program 74 times [2022-01-31 17:46:26,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:26,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [716610150] [2022-01-31 17:46:26,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:26,386 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:26,386 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:26,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:26,412 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:26,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:27,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:27,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:27,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:27,961 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:27,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [716610150] [2022-01-31 17:46:27,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [716610150] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:27,961 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:27,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-01-31 17:46:27,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233896359] [2022-01-31 17:46:27,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:27,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-31 17:46:27,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:27,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-31 17:46:27,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 17:46:27,963 INFO L87 Difference]: Start difference. First operand 548 states and 555 transitions. Second operand has 78 states, 78 states have (on average 1.294871794871795) internal successors, (101), 77 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) [2022-01-31 17:46:30,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:30,535 INFO L93 Difference]: Finished difference Result 1022 states and 1042 transitions. [2022-01-31 17:46:30,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-31 17:46:30,535 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.294871794871795) internal successors, (101), 77 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 543 [2022-01-31 17:46:30,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:30,536 INFO L225 Difference]: With dead ends: 1022 [2022-01-31 17:46:30,536 INFO L226 Difference]: Without dead ends: 555 [2022-01-31 17:46:30,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2849 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=8778, Invalid=14478, Unknown=0, NotChecked=0, Total=23256 [2022-01-31 17:46:30,538 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 2327 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 2933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2327 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:30,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 51 Invalid, 2933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2327 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:46:30,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2022-01-31 17:46:30,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 555. [2022-01-31 17:46:30,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 549 states have (on average 1.0145719489981786) internal successors, (557), 549 states have internal predecessors, (557), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:30,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 562 transitions. [2022-01-31 17:46:30,548 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 562 transitions. Word has length 543 [2022-01-31 17:46:30,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:30,548 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 562 transitions. [2022-01-31 17:46:30,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.294871794871795) internal successors, (101), 77 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) [2022-01-31 17:46:30,548 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 562 transitions. [2022-01-31 17:46:30,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 551 [2022-01-31 17:46:30,550 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:30,550 INFO L514 BasicCegarLoop]: trace histogram [75, 75, 75, 75, 75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:30,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 17:46:30,550 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:30,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:30,550 INFO L85 PathProgramCache]: Analyzing trace with hash -681117436, now seen corresponding path program 75 times [2022-01-31 17:46:30,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:30,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988785364] [2022-01-31 17:46:30,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:30,552 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:30,552 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:30,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:30,573 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:30,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:32,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:32,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:32,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:32,387 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:32,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988785364] [2022-01-31 17:46:32,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [988785364] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:32,387 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:32,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-01-31 17:46:32,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698807917] [2022-01-31 17:46:32,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:32,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-01-31 17:46:32,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:32,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-01-31 17:46:32,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 17:46:32,390 INFO L87 Difference]: Start difference. First operand 555 states and 562 transitions. Second operand has 79 states, 79 states have (on average 1.2911392405063291) internal successors, (102), 78 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) [2022-01-31 17:46:35,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:35,759 INFO L93 Difference]: Finished difference Result 1035 states and 1055 transitions. [2022-01-31 17:46:35,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-31 17:46:35,759 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.2911392405063291) internal successors, (102), 78 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 550 [2022-01-31 17:46:35,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:35,761 INFO L225 Difference]: With dead ends: 1035 [2022-01-31 17:46:35,761 INFO L226 Difference]: Without dead ends: 562 [2022-01-31 17:46:35,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2925 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=9009, Invalid=14861, Unknown=0, NotChecked=0, Total=23870 [2022-01-31 17:46:35,762 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 2563 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 3212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2563 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:35,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 61 Invalid, 3212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2563 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:46:35,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2022-01-31 17:46:35,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 562. [2022-01-31 17:46:35,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 556 states have (on average 1.014388489208633) internal successors, (564), 556 states have internal predecessors, (564), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:35,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 569 transitions. [2022-01-31 17:46:35,773 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 569 transitions. Word has length 550 [2022-01-31 17:46:35,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:35,773 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 569 transitions. [2022-01-31 17:46:35,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.2911392405063291) internal successors, (102), 78 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) [2022-01-31 17:46:35,773 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 569 transitions. [2022-01-31 17:46:35,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 558 [2022-01-31 17:46:35,775 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:35,775 INFO L514 BasicCegarLoop]: trace histogram [76, 76, 76, 76, 76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:35,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 17:46:35,775 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:35,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:35,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1777716727, now seen corresponding path program 76 times [2022-01-31 17:46:35,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:35,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1299630073] [2022-01-31 17:46:35,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:35,776 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:35,776 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:35,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:35,796 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:35,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:37,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:37,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:37,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:37,265 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:37,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1299630073] [2022-01-31 17:46:37,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1299630073] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:37,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:37,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-01-31 17:46:37,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205402297] [2022-01-31 17:46:37,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:37,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-31 17:46:37,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:37,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-31 17:46:37,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 17:46:37,268 INFO L87 Difference]: Start difference. First operand 562 states and 569 transitions. Second operand has 80 states, 80 states have (on average 1.2875) internal successors, (103), 79 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) [2022-01-31 17:46:39,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:39,932 INFO L93 Difference]: Finished difference Result 1048 states and 1068 transitions. [2022-01-31 17:46:39,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-31 17:46:39,933 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.2875) internal successors, (103), 79 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 557 [2022-01-31 17:46:39,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:39,934 INFO L225 Difference]: With dead ends: 1048 [2022-01-31 17:46:39,934 INFO L226 Difference]: Without dead ends: 569 [2022-01-31 17:46:39,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3002 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=9243, Invalid=15249, Unknown=0, NotChecked=0, Total=24492 [2022-01-31 17:46:39,935 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 2177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 2797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2177 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:39,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 51 Invalid, 2797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2177 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:46:39,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-01-31 17:46:39,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 569. [2022-01-31 17:46:39,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 563 states have (on average 1.014209591474245) internal successors, (571), 563 states have internal predecessors, (571), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:39,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 576 transitions. [2022-01-31 17:46:39,945 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 576 transitions. Word has length 557 [2022-01-31 17:46:39,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:39,945 INFO L470 AbstractCegarLoop]: Abstraction has 569 states and 576 transitions. [2022-01-31 17:46:39,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.2875) internal successors, (103), 79 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) [2022-01-31 17:46:39,946 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 576 transitions. [2022-01-31 17:46:39,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 565 [2022-01-31 17:46:39,947 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:39,947 INFO L514 BasicCegarLoop]: trace histogram [77, 77, 77, 77, 77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:39,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 17:46:39,948 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:39,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:39,948 INFO L85 PathProgramCache]: Analyzing trace with hash 224231076, now seen corresponding path program 77 times [2022-01-31 17:46:39,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:39,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1763580037] [2022-01-31 17:46:39,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:39,950 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:39,950 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:39,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:39,970 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:40,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:41,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:41,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:41,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:41,866 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:41,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1763580037] [2022-01-31 17:46:41,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1763580037] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:41,866 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:41,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-01-31 17:46:41,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239513034] [2022-01-31 17:46:41,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:41,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-01-31 17:46:41,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:41,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-01-31 17:46:41,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 17:46:41,868 INFO L87 Difference]: Start difference. First operand 569 states and 576 transitions. Second operand has 81 states, 81 states have (on average 1.2839506172839505) internal successors, (104), 80 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) [2022-01-31 17:46:45,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:45,178 INFO L93 Difference]: Finished difference Result 1061 states and 1081 transitions. [2022-01-31 17:46:45,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-31 17:46:45,178 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.2839506172839505) internal successors, (104), 80 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 564 [2022-01-31 17:46:45,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:45,180 INFO L225 Difference]: With dead ends: 1061 [2022-01-31 17:46:45,180 INFO L226 Difference]: Without dead ends: 576 [2022-01-31 17:46:45,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3080 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=9480, Invalid=15642, Unknown=0, NotChecked=0, Total=25122 [2022-01-31 17:46:45,183 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 2291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 2954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2291 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:45,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 61 Invalid, 2954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2291 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:46:45,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2022-01-31 17:46:45,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 576. [2022-01-31 17:46:45,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 570 states have (on average 1.0140350877192983) internal successors, (578), 570 states have internal predecessors, (578), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:45,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 583 transitions. [2022-01-31 17:46:45,193 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 583 transitions. Word has length 564 [2022-01-31 17:46:45,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:45,193 INFO L470 AbstractCegarLoop]: Abstraction has 576 states and 583 transitions. [2022-01-31 17:46:45,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.2839506172839505) internal successors, (104), 80 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) [2022-01-31 17:46:45,194 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 583 transitions. [2022-01-31 17:46:45,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 572 [2022-01-31 17:46:45,195 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:45,195 INFO L514 BasicCegarLoop]: trace histogram [78, 78, 78, 78, 78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:45,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-01-31 17:46:45,196 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:45,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:45,196 INFO L85 PathProgramCache]: Analyzing trace with hash 386052439, now seen corresponding path program 78 times [2022-01-31 17:46:45,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:45,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [804796532] [2022-01-31 17:46:45,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:45,197 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:45,197 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:45,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:45,217 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:45,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:47,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:47,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:47,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:47,156 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:47,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [804796532] [2022-01-31 17:46:47,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [804796532] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:47,156 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:47,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-01-31 17:46:47,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78797680] [2022-01-31 17:46:47,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:47,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-01-31 17:46:47,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:47,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-01-31 17:46:47,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 17:46:47,158 INFO L87 Difference]: Start difference. First operand 576 states and 583 transitions. Second operand has 82 states, 82 states have (on average 1.2804878048780488) internal successors, (105), 81 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) [2022-01-31 17:46:50,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:50,277 INFO L93 Difference]: Finished difference Result 1074 states and 1094 transitions. [2022-01-31 17:46:50,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-31 17:46:50,278 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.2804878048780488) internal successors, (105), 81 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 571 [2022-01-31 17:46:50,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:50,279 INFO L225 Difference]: With dead ends: 1074 [2022-01-31 17:46:50,279 INFO L226 Difference]: Without dead ends: 583 [2022-01-31 17:46:50,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3159 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=9720, Invalid=16040, Unknown=0, NotChecked=0, Total=25760 [2022-01-31 17:46:50,281 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 2276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 2928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2276 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:50,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 56 Invalid, 2928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2276 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:46:50,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-01-31 17:46:50,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 583. [2022-01-31 17:46:50,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 577 states have (on average 1.0138648180242635) internal successors, (585), 577 states have internal predecessors, (585), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:50,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 590 transitions. [2022-01-31 17:46:50,290 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 590 transitions. Word has length 571 [2022-01-31 17:46:50,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:50,291 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 590 transitions. [2022-01-31 17:46:50,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.2804878048780488) internal successors, (105), 81 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) [2022-01-31 17:46:50,291 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 590 transitions. [2022-01-31 17:46:50,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 579 [2022-01-31 17:46:50,292 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:50,293 INFO L514 BasicCegarLoop]: trace histogram [79, 79, 79, 79, 79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:50,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-01-31 17:46:50,293 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:50,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:50,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1835160508, now seen corresponding path program 79 times [2022-01-31 17:46:50,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:50,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229941115] [2022-01-31 17:46:50,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:50,294 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:50,294 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:50,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:50,314 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:50,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:52,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:52,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:52,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:52,235 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:52,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1229941115] [2022-01-31 17:46:52,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1229941115] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:52,235 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:52,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-01-31 17:46:52,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125491373] [2022-01-31 17:46:52,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:52,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-01-31 17:46:52,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:52,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-01-31 17:46:52,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 17:46:52,246 INFO L87 Difference]: Start difference. First operand 583 states and 590 transitions. Second operand has 83 states, 83 states have (on average 1.2771084337349397) internal successors, (106), 82 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) [2022-01-31 17:46:55,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:55,487 INFO L93 Difference]: Finished difference Result 1087 states and 1107 transitions. [2022-01-31 17:46:55,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-31 17:46:55,487 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.2771084337349397) internal successors, (106), 82 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 578 [2022-01-31 17:46:55,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:55,489 INFO L225 Difference]: With dead ends: 1087 [2022-01-31 17:46:55,489 INFO L226 Difference]: Without dead ends: 590 [2022-01-31 17:46:55,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3239 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=9963, Invalid=16443, Unknown=0, NotChecked=0, Total=26406 [2022-01-31 17:46:55,490 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 2353 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 2994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2353 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:55,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 51 Invalid, 2994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2353 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:46:55,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2022-01-31 17:46:55,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 590. [2022-01-31 17:46:55,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 584 states have (on average 1.0136986301369864) internal successors, (592), 584 states have internal predecessors, (592), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:55,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 597 transitions. [2022-01-31 17:46:55,501 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 597 transitions. Word has length 578 [2022-01-31 17:46:55,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:55,501 INFO L470 AbstractCegarLoop]: Abstraction has 590 states and 597 transitions. [2022-01-31 17:46:55,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.2771084337349397) internal successors, (106), 82 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) [2022-01-31 17:46:55,501 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 597 transitions. [2022-01-31 17:46:55,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 586 [2022-01-31 17:46:55,503 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:55,503 INFO L514 BasicCegarLoop]: trace histogram [80, 80, 80, 80, 80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:55,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-01-31 17:46:55,504 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:55,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:55,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1164471479, now seen corresponding path program 80 times [2022-01-31 17:46:55,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:55,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102054465] [2022-01-31 17:46:55,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:55,505 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:55,505 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:55,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:55,526 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:55,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:57,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:57,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:57,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:57,771 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:57,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102054465] [2022-01-31 17:46:57,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [102054465] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:57,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:57,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-01-31 17:46:57,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809367459] [2022-01-31 17:46:57,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:57,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-31 17:46:57,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:57,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-31 17:46:57,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 17:46:57,774 INFO L87 Difference]: Start difference. First operand 590 states and 597 transitions. Second operand has 84 states, 84 states have (on average 1.2738095238095237) internal successors, (107), 83 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) [2022-01-31 17:47:00,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:00,841 INFO L93 Difference]: Finished difference Result 1100 states and 1120 transitions. [2022-01-31 17:47:00,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-31 17:47:00,841 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.2738095238095237) internal successors, (107), 83 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 585 [2022-01-31 17:47:00,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:00,842 INFO L225 Difference]: With dead ends: 1100 [2022-01-31 17:47:00,842 INFO L226 Difference]: Without dead ends: 597 [2022-01-31 17:47:00,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3320 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=10209, Invalid=16851, Unknown=0, NotChecked=0, Total=27060 [2022-01-31 17:47:00,844 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 2455 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 3121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2455 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:00,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 56 Invalid, 3121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2455 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:47:00,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2022-01-31 17:47:00,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 597. [2022-01-31 17:47:00,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 591 states have (on average 1.0135363790186125) internal successors, (599), 591 states have internal predecessors, (599), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:00,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 604 transitions. [2022-01-31 17:47:00,855 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 604 transitions. Word has length 585 [2022-01-31 17:47:00,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:00,855 INFO L470 AbstractCegarLoop]: Abstraction has 597 states and 604 transitions. [2022-01-31 17:47:00,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.2738095238095237) internal successors, (107), 83 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) [2022-01-31 17:47:00,855 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 604 transitions. [2022-01-31 17:47:00,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 593 [2022-01-31 17:47:00,857 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:00,857 INFO L514 BasicCegarLoop]: trace histogram [81, 81, 81, 81, 81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:00,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-01-31 17:47:00,857 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:00,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:00,857 INFO L85 PathProgramCache]: Analyzing trace with hash 691634660, now seen corresponding path program 81 times [2022-01-31 17:47:00,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:00,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1129451007] [2022-01-31 17:47:00,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:00,859 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:00,859 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:00,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:00,883 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:01,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:02,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:02,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:02,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:02,499 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:02,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1129451007] [2022-01-31 17:47:02,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1129451007] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:02,499 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:02,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-01-31 17:47:02,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921632578] [2022-01-31 17:47:02,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:02,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-01-31 17:47:02,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:02,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-01-31 17:47:02,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 17:47:02,504 INFO L87 Difference]: Start difference. First operand 597 states and 604 transitions. Second operand has 85 states, 85 states have (on average 1.2705882352941176) internal successors, (108), 84 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) [2022-01-31 17:47:05,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:05,595 INFO L93 Difference]: Finished difference Result 1113 states and 1133 transitions. [2022-01-31 17:47:05,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-31 17:47:05,595 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.2705882352941176) internal successors, (108), 84 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 592 [2022-01-31 17:47:05,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:05,597 INFO L225 Difference]: With dead ends: 1113 [2022-01-31 17:47:05,597 INFO L226 Difference]: Without dead ends: 604 [2022-01-31 17:47:05,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3402 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=10458, Invalid=17264, Unknown=0, NotChecked=0, Total=27722 [2022-01-31 17:47:05,598 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 2535 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 3208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2535 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:05,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 56 Invalid, 3208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2535 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:47:05,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2022-01-31 17:47:05,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 604. [2022-01-31 17:47:05,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 598 states have (on average 1.0133779264214047) internal successors, (606), 598 states have internal predecessors, (606), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:05,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 611 transitions. [2022-01-31 17:47:05,609 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 611 transitions. Word has length 592 [2022-01-31 17:47:05,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:05,609 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 611 transitions. [2022-01-31 17:47:05,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.2705882352941176) internal successors, (108), 84 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) [2022-01-31 17:47:05,610 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 611 transitions. [2022-01-31 17:47:05,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 600 [2022-01-31 17:47:05,612 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:05,612 INFO L514 BasicCegarLoop]: trace histogram [82, 82, 82, 82, 82, 82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:05,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-01-31 17:47:05,612 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:05,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:05,612 INFO L85 PathProgramCache]: Analyzing trace with hash 2069168151, now seen corresponding path program 82 times [2022-01-31 17:47:05,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:05,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2046878677] [2022-01-31 17:47:05,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:05,614 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:05,614 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:05,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:05,639 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:05,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:07,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:07,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:07,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:07,967 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:07,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2046878677] [2022-01-31 17:47:07,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2046878677] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:07,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:07,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-01-31 17:47:07,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466099141] [2022-01-31 17:47:07,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:07,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-01-31 17:47:07,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:07,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-01-31 17:47:07,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 17:47:07,969 INFO L87 Difference]: Start difference. First operand 604 states and 611 transitions. Second operand has 86 states, 86 states have (on average 1.2674418604651163) internal successors, (109), 85 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) [2022-01-31 17:47:11,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:11,277 INFO L93 Difference]: Finished difference Result 1126 states and 1146 transitions. [2022-01-31 17:47:11,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-31 17:47:11,277 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.2674418604651163) internal successors, (109), 85 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 599 [2022-01-31 17:47:11,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:11,279 INFO L225 Difference]: With dead ends: 1126 [2022-01-31 17:47:11,279 INFO L226 Difference]: Without dead ends: 611 [2022-01-31 17:47:11,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3485 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=10710, Invalid=17682, Unknown=0, NotChecked=0, Total=28392 [2022-01-31 17:47:11,280 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 2851 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 3513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2851 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:11,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 51 Invalid, 3513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2851 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:47:11,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-01-31 17:47:11,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 611. [2022-01-31 17:47:11,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 611 states, 605 states have (on average 1.0132231404958678) internal successors, (613), 605 states have internal predecessors, (613), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:11,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 618 transitions. [2022-01-31 17:47:11,291 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 618 transitions. Word has length 599 [2022-01-31 17:47:11,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:11,291 INFO L470 AbstractCegarLoop]: Abstraction has 611 states and 618 transitions. [2022-01-31 17:47:11,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.2674418604651163) internal successors, (109), 85 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) [2022-01-31 17:47:11,291 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 618 transitions. [2022-01-31 17:47:11,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 607 [2022-01-31 17:47:11,293 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:11,293 INFO L514 BasicCegarLoop]: trace histogram [83, 83, 83, 83, 83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:11,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-01-31 17:47:11,294 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:11,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:11,295 INFO L85 PathProgramCache]: Analyzing trace with hash 29556612, now seen corresponding path program 83 times [2022-01-31 17:47:11,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:11,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1191714767] [2022-01-31 17:47:11,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:11,296 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:11,296 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:11,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:11,318 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:11,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:13,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:13,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:13,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:13,253 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:13,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1191714767] [2022-01-31 17:47:13,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1191714767] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:13,253 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:13,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-01-31 17:47:13,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476618097] [2022-01-31 17:47:13,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:13,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-01-31 17:47:13,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:13,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-01-31 17:47:13,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 17:47:13,255 INFO L87 Difference]: Start difference. First operand 611 states and 618 transitions. Second operand has 87 states, 87 states have (on average 1.264367816091954) internal successors, (110), 86 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) [2022-01-31 17:47:16,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:16,355 INFO L93 Difference]: Finished difference Result 1139 states and 1159 transitions. [2022-01-31 17:47:16,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-31 17:47:16,355 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.264367816091954) internal successors, (110), 86 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 606 [2022-01-31 17:47:16,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:16,357 INFO L225 Difference]: With dead ends: 1139 [2022-01-31 17:47:16,357 INFO L226 Difference]: Without dead ends: 618 [2022-01-31 17:47:16,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3569 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=10965, Invalid=18105, Unknown=0, NotChecked=0, Total=29070 [2022-01-31 17:47:16,358 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 2669 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 3320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2669 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:16,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 46 Invalid, 3320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2669 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:47:16,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2022-01-31 17:47:16,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 618. [2022-01-31 17:47:16,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 612 states have (on average 1.0130718954248366) internal successors, (620), 612 states have internal predecessors, (620), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:16,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 625 transitions. [2022-01-31 17:47:16,369 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 625 transitions. Word has length 606 [2022-01-31 17:47:16,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:16,369 INFO L470 AbstractCegarLoop]: Abstraction has 618 states and 625 transitions. [2022-01-31 17:47:16,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.264367816091954) internal successors, (110), 86 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) [2022-01-31 17:47:16,369 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 625 transitions. [2022-01-31 17:47:16,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 614 [2022-01-31 17:47:16,371 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:16,371 INFO L514 BasicCegarLoop]: trace histogram [84, 84, 84, 84, 84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:16,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-01-31 17:47:16,372 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:16,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:16,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1618373495, now seen corresponding path program 84 times [2022-01-31 17:47:16,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:16,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1070082599] [2022-01-31 17:47:16,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:16,373 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:16,373 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:16,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:16,394 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:16,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:19,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:19,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:19,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:19,037 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:19,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1070082599] [2022-01-31 17:47:19,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1070082599] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:19,037 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:19,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-01-31 17:47:19,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925782336] [2022-01-31 17:47:19,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:19,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-01-31 17:47:19,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:19,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-01-31 17:47:19,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 17:47:19,039 INFO L87 Difference]: Start difference. First operand 618 states and 625 transitions. Second operand has 88 states, 88 states have (on average 1.2613636363636365) internal successors, (111), 87 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) [2022-01-31 17:47:22,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:22,308 INFO L93 Difference]: Finished difference Result 1152 states and 1172 transitions. [2022-01-31 17:47:22,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-31 17:47:22,308 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 1.2613636363636365) internal successors, (111), 87 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 613 [2022-01-31 17:47:22,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:22,309 INFO L225 Difference]: With dead ends: 1152 [2022-01-31 17:47:22,310 INFO L226 Difference]: Without dead ends: 625 [2022-01-31 17:47:22,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3654 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=11223, Invalid=18533, Unknown=0, NotChecked=0, Total=29756 [2022-01-31 17:47:22,311 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 2431 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 3143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2431 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:22,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 61 Invalid, 3143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2431 Valid, 712 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:47:22,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2022-01-31 17:47:22,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 625. [2022-01-31 17:47:22,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 619 states have (on average 1.012924071082391) internal successors, (627), 619 states have internal predecessors, (627), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:22,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 632 transitions. [2022-01-31 17:47:22,322 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 632 transitions. Word has length 613 [2022-01-31 17:47:22,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:22,322 INFO L470 AbstractCegarLoop]: Abstraction has 625 states and 632 transitions. [2022-01-31 17:47:22,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 1.2613636363636365) internal successors, (111), 87 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) [2022-01-31 17:47:22,323 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 632 transitions. [2022-01-31 17:47:22,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 621 [2022-01-31 17:47:22,325 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:22,325 INFO L514 BasicCegarLoop]: trace histogram [85, 85, 85, 85, 85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:22,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-01-31 17:47:22,325 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:22,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:22,325 INFO L85 PathProgramCache]: Analyzing trace with hash -615766748, now seen corresponding path program 85 times [2022-01-31 17:47:22,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:22,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [950145817] [2022-01-31 17:47:22,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:22,326 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:22,326 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:22,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:22,352 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:22,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:24,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:24,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:24,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:24,581 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:24,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [950145817] [2022-01-31 17:47:24,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [950145817] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:24,581 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:24,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-01-31 17:47:24,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844239181] [2022-01-31 17:47:24,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:24,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-01-31 17:47:24,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:24,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-01-31 17:47:24,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 17:47:24,584 INFO L87 Difference]: Start difference. First operand 625 states and 632 transitions. Second operand has 89 states, 89 states have (on average 1.2584269662921348) internal successors, (112), 88 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:27,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:27,758 INFO L93 Difference]: Finished difference Result 1165 states and 1185 transitions. [2022-01-31 17:47:27,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-31 17:47:27,759 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.2584269662921348) internal successors, (112), 88 states have internal predecessors, (112), 2 states have call successors, (3), 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 620 [2022-01-31 17:47:27,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:27,760 INFO L225 Difference]: With dead ends: 1165 [2022-01-31 17:47:27,760 INFO L226 Difference]: Without dead ends: 632 [2022-01-31 17:47:27,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3740 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=11484, Invalid=18966, Unknown=0, NotChecked=0, Total=30450 [2022-01-31 17:47:27,762 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 2519 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 3256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2519 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:27,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 66 Invalid, 3256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2519 Valid, 737 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:47:27,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2022-01-31 17:47:27,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 632. [2022-01-31 17:47:27,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 626 states have (on average 1.012779552715655) internal successors, (634), 626 states have internal predecessors, (634), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:27,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 639 transitions. [2022-01-31 17:47:27,774 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 639 transitions. Word has length 620 [2022-01-31 17:47:27,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:27,774 INFO L470 AbstractCegarLoop]: Abstraction has 632 states and 639 transitions. [2022-01-31 17:47:27,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.2584269662921348) internal successors, (112), 88 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:27,775 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 639 transitions. [2022-01-31 17:47:27,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 628 [2022-01-31 17:47:27,777 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:27,777 INFO L514 BasicCegarLoop]: trace histogram [86, 86, 86, 86, 86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:27,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-01-31 17:47:27,777 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:27,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:27,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1644515625, now seen corresponding path program 86 times [2022-01-31 17:47:27,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:27,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [320440273] [2022-01-31 17:47:27,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:27,780 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:27,780 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:27,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:27,819 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:28,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:30,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:30,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:30,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:30,209 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:30,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [320440273] [2022-01-31 17:47:30,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [320440273] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:30,209 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:30,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-01-31 17:47:30,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457766741] [2022-01-31 17:47:30,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:30,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-01-31 17:47:30,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:30,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-01-31 17:47:30,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 17:47:30,211 INFO L87 Difference]: Start difference. First operand 632 states and 639 transitions. Second operand has 90 states, 90 states have (on average 1.2555555555555555) internal successors, (113), 89 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:34,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:34,151 INFO L93 Difference]: Finished difference Result 1178 states and 1198 transitions. [2022-01-31 17:47:34,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-31 17:47:34,152 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.2555555555555555) internal successors, (113), 89 states have internal predecessors, (113), 2 states have call successors, (3), 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 627 [2022-01-31 17:47:34,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:34,153 INFO L225 Difference]: With dead ends: 1178 [2022-01-31 17:47:34,153 INFO L226 Difference]: Without dead ends: 639 [2022-01-31 17:47:34,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3827 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=11748, Invalid=19404, Unknown=0, NotChecked=0, Total=31152 [2022-01-31 17:47:34,155 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 2757 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 3447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2757 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:34,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 51 Invalid, 3447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2757 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:47:34,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-01-31 17:47:34,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 639. [2022-01-31 17:47:34,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 633 states have (on average 1.0126382306477093) internal successors, (641), 633 states have internal predecessors, (641), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:34,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 646 transitions. [2022-01-31 17:47:34,166 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 646 transitions. Word has length 627 [2022-01-31 17:47:34,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:34,166 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 646 transitions. [2022-01-31 17:47:34,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.2555555555555555) internal successors, (113), 89 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:34,166 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 646 transitions. [2022-01-31 17:47:34,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 635 [2022-01-31 17:47:34,168 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:34,169 INFO L514 BasicCegarLoop]: trace histogram [87, 87, 87, 87, 87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:34,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-01-31 17:47:34,169 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:34,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:34,169 INFO L85 PathProgramCache]: Analyzing trace with hash 593949380, now seen corresponding path program 87 times [2022-01-31 17:47:34,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:34,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1340128471] [2022-01-31 17:47:34,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:34,170 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:34,170 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:34,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:34,198 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:34,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:36,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:36,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:36,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:36,631 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:36,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1340128471] [2022-01-31 17:47:36,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1340128471] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:36,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:36,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-01-31 17:47:36,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890324236] [2022-01-31 17:47:36,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:36,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-01-31 17:47:36,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:36,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-01-31 17:47:36,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 17:47:36,634 INFO L87 Difference]: Start difference. First operand 639 states and 646 transitions. Second operand has 91 states, 91 states have (on average 1.2527472527472527) internal successors, (114), 90 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) [2022-01-31 17:47:40,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:40,296 INFO L93 Difference]: Finished difference Result 1191 states and 1211 transitions. [2022-01-31 17:47:40,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-31 17:47:40,296 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.2527472527472527) internal successors, (114), 90 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 634 [2022-01-31 17:47:40,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:40,310 INFO L225 Difference]: With dead ends: 1191 [2022-01-31 17:47:40,310 INFO L226 Difference]: Without dead ends: 646 [2022-01-31 17:47:40,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3915 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=12015, Invalid=19847, Unknown=0, NotChecked=0, Total=31862 [2022-01-31 17:47:40,312 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 2301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 3034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2301 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:40,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 61 Invalid, 3034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2301 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:47:40,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2022-01-31 17:47:40,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 646. [2022-01-31 17:47:40,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 640 states have (on average 1.0125) internal successors, (648), 640 states have internal predecessors, (648), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:40,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 653 transitions. [2022-01-31 17:47:40,327 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 653 transitions. Word has length 634 [2022-01-31 17:47:40,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:40,327 INFO L470 AbstractCegarLoop]: Abstraction has 646 states and 653 transitions. [2022-01-31 17:47:40,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.2527472527472527) internal successors, (114), 90 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) [2022-01-31 17:47:40,328 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 653 transitions. [2022-01-31 17:47:40,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 642 [2022-01-31 17:47:40,330 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:40,330 INFO L514 BasicCegarLoop]: trace histogram [88, 88, 88, 88, 88, 88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:40,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-01-31 17:47:40,330 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:40,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:40,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1097872841, now seen corresponding path program 88 times [2022-01-31 17:47:40,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:40,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [328973925] [2022-01-31 17:47:40,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:40,335 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:40,335 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:40,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:40,364 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:40,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:43,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:43,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:43,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:43,105 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:43,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [328973925] [2022-01-31 17:47:43,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [328973925] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:43,106 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:43,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-01-31 17:47:43,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301584504] [2022-01-31 17:47:43,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:43,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-01-31 17:47:43,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:43,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-01-31 17:47:43,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 17:47:43,108 INFO L87 Difference]: Start difference. First operand 646 states and 653 transitions. Second operand has 92 states, 92 states have (on average 1.25) internal successors, (115), 91 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) [2022-01-31 17:47:46,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:46,819 INFO L93 Difference]: Finished difference Result 1204 states and 1224 transitions. [2022-01-31 17:47:46,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-31 17:47:46,819 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.25) internal successors, (115), 91 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 641 [2022-01-31 17:47:46,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:46,821 INFO L225 Difference]: With dead ends: 1204 [2022-01-31 17:47:46,821 INFO L226 Difference]: Without dead ends: 653 [2022-01-31 17:47:46,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4004 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=12285, Invalid=20295, Unknown=0, NotChecked=0, Total=32580 [2022-01-31 17:47:46,823 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 2489 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 3247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2489 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:46,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 66 Invalid, 3247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2489 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:47:46,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2022-01-31 17:47:46,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 653. [2022-01-31 17:47:46,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 647 states have (on average 1.0123647604327666) internal successors, (655), 647 states have internal predecessors, (655), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:46,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 660 transitions. [2022-01-31 17:47:46,835 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 660 transitions. Word has length 641 [2022-01-31 17:47:46,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:46,835 INFO L470 AbstractCegarLoop]: Abstraction has 653 states and 660 transitions. [2022-01-31 17:47:46,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 1.25) internal successors, (115), 91 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) [2022-01-31 17:47:46,836 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 660 transitions. [2022-01-31 17:47:46,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 649 [2022-01-31 17:47:46,860 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:46,860 INFO L514 BasicCegarLoop]: trace histogram [89, 89, 89, 89, 89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:46,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-01-31 17:47:46,860 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:46,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:46,861 INFO L85 PathProgramCache]: Analyzing trace with hash 371550308, now seen corresponding path program 89 times [2022-01-31 17:47:46,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:46,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1516737527] [2022-01-31 17:47:46,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:46,862 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:46,862 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:46,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:46,889 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:47,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:49,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:49,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:49,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:49,361 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:49,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1516737527] [2022-01-31 17:47:49,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1516737527] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:49,361 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:49,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-01-31 17:47:49,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022144801] [2022-01-31 17:47:49,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:49,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-01-31 17:47:49,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:49,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-01-31 17:47:49,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 17:47:49,363 INFO L87 Difference]: Start difference. First operand 653 states and 660 transitions. Second operand has 93 states, 93 states have (on average 1.2473118279569892) internal successors, (116), 92 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) [2022-01-31 17:47:53,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:53,231 INFO L93 Difference]: Finished difference Result 1217 states and 1237 transitions. [2022-01-31 17:47:53,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-31 17:47:53,232 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.2473118279569892) internal successors, (116), 92 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 648 [2022-01-31 17:47:53,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:53,247 INFO L225 Difference]: With dead ends: 1217 [2022-01-31 17:47:53,247 INFO L226 Difference]: Without dead ends: 660 [2022-01-31 17:47:53,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4094 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=12558, Invalid=20748, Unknown=0, NotChecked=0, Total=33306 [2022-01-31 17:47:53,249 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 3229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 3922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3229 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:53,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 46 Invalid, 3922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3229 Valid, 693 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:47:53,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2022-01-31 17:47:53,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 660. [2022-01-31 17:47:53,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 654 states have (on average 1.0122324159021407) internal successors, (662), 654 states have internal predecessors, (662), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:53,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 667 transitions. [2022-01-31 17:47:53,260 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 667 transitions. Word has length 648 [2022-01-31 17:47:53,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:53,260 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 667 transitions. [2022-01-31 17:47:53,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.2473118279569892) internal successors, (116), 92 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) [2022-01-31 17:47:53,260 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 667 transitions. [2022-01-31 17:47:53,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 656 [2022-01-31 17:47:53,262 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:53,262 INFO L514 BasicCegarLoop]: trace histogram [90, 90, 90, 90, 90, 90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:53,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-01-31 17:47:53,263 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:53,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:53,277 INFO L85 PathProgramCache]: Analyzing trace with hash 241417623, now seen corresponding path program 90 times [2022-01-31 17:47:53,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:53,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [311737048] [2022-01-31 17:47:53,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:53,284 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:53,284 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:53,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:53,311 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:53,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:55,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:55,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:55,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:55,882 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:55,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [311737048] [2022-01-31 17:47:55,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [311737048] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:55,882 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:55,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-01-31 17:47:55,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496178575] [2022-01-31 17:47:55,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:55,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-01-31 17:47:55,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:55,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-01-31 17:47:55,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 17:47:55,884 INFO L87 Difference]: Start difference. First operand 660 states and 667 transitions. Second operand has 94 states, 94 states have (on average 1.2446808510638299) internal successors, (117), 93 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) [2022-01-31 17:48:00,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:00,020 INFO L93 Difference]: Finished difference Result 1230 states and 1250 transitions. [2022-01-31 17:48:00,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-31 17:48:00,020 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.2446808510638299) internal successors, (117), 93 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 655 [2022-01-31 17:48:00,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:00,024 INFO L225 Difference]: With dead ends: 1230 [2022-01-31 17:48:00,024 INFO L226 Difference]: Without dead ends: 667 [2022-01-31 17:48:00,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4185 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=12834, Invalid=21206, Unknown=0, NotChecked=0, Total=34040 [2022-01-31 17:48:00,026 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 2485 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 3239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2485 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:00,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 61 Invalid, 3239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2485 Valid, 754 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:48:00,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-01-31 17:48:00,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 667. [2022-01-31 17:48:00,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 661 states have (on average 1.0121028744326777) internal successors, (669), 661 states have internal predecessors, (669), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:00,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 674 transitions. [2022-01-31 17:48:00,037 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 674 transitions. Word has length 655 [2022-01-31 17:48:00,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:00,038 INFO L470 AbstractCegarLoop]: Abstraction has 667 states and 674 transitions. [2022-01-31 17:48:00,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 1.2446808510638299) internal successors, (117), 93 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) [2022-01-31 17:48:00,038 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 674 transitions. [2022-01-31 17:48:00,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 663 [2022-01-31 17:48:00,040 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:00,040 INFO L514 BasicCegarLoop]: trace histogram [91, 91, 91, 91, 91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:00,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-01-31 17:48:00,044 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:00,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:00,044 INFO L85 PathProgramCache]: Analyzing trace with hash -568752636, now seen corresponding path program 91 times [2022-01-31 17:48:00,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:00,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1993691706] [2022-01-31 17:48:00,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:00,045 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:00,045 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:00,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:00,073 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:00,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:02,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:02,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:02,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:02,806 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:02,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1993691706] [2022-01-31 17:48:02,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1993691706] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:02,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:02,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-01-31 17:48:02,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814423208] [2022-01-31 17:48:02,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:02,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-01-31 17:48:02,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:02,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-01-31 17:48:02,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 17:48:02,809 INFO L87 Difference]: Start difference. First operand 667 states and 674 transitions. Second operand has 95 states, 95 states have (on average 1.2421052631578948) internal successors, (118), 94 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) [2022-01-31 17:48:07,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:07,203 INFO L93 Difference]: Finished difference Result 1243 states and 1263 transitions. [2022-01-31 17:48:07,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-31 17:48:07,204 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 1.2421052631578948) internal successors, (118), 94 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 662 [2022-01-31 17:48:07,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:07,205 INFO L225 Difference]: With dead ends: 1243 [2022-01-31 17:48:07,205 INFO L226 Difference]: Without dead ends: 674 [2022-01-31 17:48:07,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4277 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=13113, Invalid=21669, Unknown=0, NotChecked=0, Total=34782 [2022-01-31 17:48:07,207 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 2678 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 3457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2678 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:07,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 66 Invalid, 3457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2678 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:48:07,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2022-01-31 17:48:07,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 674. [2022-01-31 17:48:07,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 668 states have (on average 1.0119760479041917) internal successors, (676), 668 states have internal predecessors, (676), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:07,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 681 transitions. [2022-01-31 17:48:07,218 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 681 transitions. Word has length 662 [2022-01-31 17:48:07,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:07,218 INFO L470 AbstractCegarLoop]: Abstraction has 674 states and 681 transitions. [2022-01-31 17:48:07,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 1.2421052631578948) internal successors, (118), 94 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) [2022-01-31 17:48:07,218 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 681 transitions. [2022-01-31 17:48:07,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 670 [2022-01-31 17:48:07,221 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:07,221 INFO L514 BasicCegarLoop]: trace histogram [92, 92, 92, 92, 92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:07,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-01-31 17:48:07,221 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:07,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:07,221 INFO L85 PathProgramCache]: Analyzing trace with hash 2065991927, now seen corresponding path program 92 times [2022-01-31 17:48:07,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:07,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1791102714] [2022-01-31 17:48:07,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:07,222 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:07,222 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:07,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:07,255 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:07,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:10,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:10,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:10,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:10,048 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:10,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1791102714] [2022-01-31 17:48:10,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1791102714] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:10,048 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:10,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-01-31 17:48:10,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125785157] [2022-01-31 17:48:10,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:10,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-01-31 17:48:10,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:10,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-01-31 17:48:10,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 17:48:10,051 INFO L87 Difference]: Start difference. First operand 674 states and 681 transitions. Second operand has 96 states, 96 states have (on average 1.2395833333333333) internal successors, (119), 95 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) [2022-01-31 17:48:14,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:14,119 INFO L93 Difference]: Finished difference Result 1256 states and 1276 transitions. [2022-01-31 17:48:14,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-31 17:48:14,119 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.2395833333333333) internal successors, (119), 95 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 669 [2022-01-31 17:48:14,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:14,120 INFO L225 Difference]: With dead ends: 1256 [2022-01-31 17:48:14,120 INFO L226 Difference]: Without dead ends: 681 [2022-01-31 17:48:14,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4370 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=13395, Invalid=22137, Unknown=0, NotChecked=0, Total=35532 [2022-01-31 17:48:14,122 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 2720 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 3506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2720 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:14,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 66 Invalid, 3506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2720 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:48:14,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2022-01-31 17:48:14,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 681. [2022-01-31 17:48:14,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 675 states have (on average 1.0118518518518518) internal successors, (683), 675 states have internal predecessors, (683), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:14,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 688 transitions. [2022-01-31 17:48:14,133 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 688 transitions. Word has length 669 [2022-01-31 17:48:14,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:14,133 INFO L470 AbstractCegarLoop]: Abstraction has 681 states and 688 transitions. [2022-01-31 17:48:14,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.2395833333333333) internal successors, (119), 95 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) [2022-01-31 17:48:14,134 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 688 transitions. [2022-01-31 17:48:14,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 677 [2022-01-31 17:48:14,136 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:14,136 INFO L514 BasicCegarLoop]: trace histogram [93, 93, 93, 93, 93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:14,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-01-31 17:48:14,136 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:14,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:14,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1269478492, now seen corresponding path program 93 times [2022-01-31 17:48:14,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:14,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [745456420] [2022-01-31 17:48:14,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:14,138 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:14,138 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:14,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:14,166 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:14,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:16,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:16,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:16,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:16,739 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:16,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [745456420] [2022-01-31 17:48:16,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [745456420] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:16,739 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:16,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-01-31 17:48:16,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76756424] [2022-01-31 17:48:16,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:16,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-01-31 17:48:16,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:16,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-01-31 17:48:16,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 17:48:16,742 INFO L87 Difference]: Start difference. First operand 681 states and 688 transitions. Second operand has 97 states, 97 states have (on average 1.2371134020618557) internal successors, (120), 96 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) [2022-01-31 17:48:20,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:20,990 INFO L93 Difference]: Finished difference Result 1269 states and 1289 transitions. [2022-01-31 17:48:20,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-31 17:48:20,990 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.2371134020618557) internal successors, (120), 96 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 676 [2022-01-31 17:48:20,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:20,991 INFO L225 Difference]: With dead ends: 1269 [2022-01-31 17:48:20,991 INFO L226 Difference]: Without dead ends: 688 [2022-01-31 17:48:20,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4464 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=13680, Invalid=22610, Unknown=0, NotChecked=0, Total=36290 [2022-01-31 17:48:20,993 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 3722 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 4425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3722 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:20,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 4425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3722 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:48:20,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2022-01-31 17:48:21,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 688. [2022-01-31 17:48:21,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 682 states have (on average 1.0117302052785924) internal successors, (690), 682 states have internal predecessors, (690), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:21,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 695 transitions. [2022-01-31 17:48:21,004 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 695 transitions. Word has length 676 [2022-01-31 17:48:21,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:21,004 INFO L470 AbstractCegarLoop]: Abstraction has 688 states and 695 transitions. [2022-01-31 17:48:21,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.2371134020618557) internal successors, (120), 96 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) [2022-01-31 17:48:21,004 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 695 transitions. [2022-01-31 17:48:21,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 684 [2022-01-31 17:48:21,006 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:21,007 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:21,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-01-31 17:48:21,007 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:21,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:21,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1946168407, now seen corresponding path program 94 times [2022-01-31 17:48:21,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:21,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [575317232] [2022-01-31 17:48:21,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:21,008 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:21,008 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:21,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:21,037 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:21,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:23,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:23,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:23,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:23,763 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:23,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [575317232] [2022-01-31 17:48:23,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [575317232] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:23,763 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:23,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-01-31 17:48:23,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108529076] [2022-01-31 17:48:23,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:23,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 17:48:23,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:23,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 17:48:23,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 17:48:23,766 INFO L87 Difference]: Start difference. First operand 688 states and 695 transitions. Second operand has 98 states, 98 states have (on average 1.2346938775510203) internal successors, (121), 97 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) [2022-01-31 17:48:27,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:27,611 INFO L93 Difference]: Finished difference Result 1282 states and 1302 transitions. [2022-01-31 17:48:27,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-31 17:48:27,611 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.2346938775510203) internal successors, (121), 97 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 683 [2022-01-31 17:48:27,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:27,612 INFO L225 Difference]: With dead ends: 1282 [2022-01-31 17:48:27,612 INFO L226 Difference]: Without dead ends: 695 [2022-01-31 17:48:27,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4559 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=13968, Invalid=23088, Unknown=0, NotChecked=0, Total=37056 [2022-01-31 17:48:27,614 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 2784 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 3530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2784 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:27,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 51 Invalid, 3530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2784 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:48:27,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2022-01-31 17:48:27,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 695. [2022-01-31 17:48:27,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 689 states have (on average 1.011611030478955) internal successors, (697), 689 states have internal predecessors, (697), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:27,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 702 transitions. [2022-01-31 17:48:27,625 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 702 transitions. Word has length 683 [2022-01-31 17:48:27,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:27,625 INFO L470 AbstractCegarLoop]: Abstraction has 695 states and 702 transitions. [2022-01-31 17:48:27,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.2346938775510203) internal successors, (121), 97 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) [2022-01-31 17:48:27,625 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 702 transitions. [2022-01-31 17:48:27,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 691 [2022-01-31 17:48:27,628 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:27,628 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 95, 95, 95, 95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:27,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-01-31 17:48:27,632 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:27,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:27,633 INFO L85 PathProgramCache]: Analyzing trace with hash 6994244, now seen corresponding path program 95 times [2022-01-31 17:48:27,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:27,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1246529677] [2022-01-31 17:48:27,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:27,634 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:27,634 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:27,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:27,663 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:27,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:30,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:30,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:30,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:30,326 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:30,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1246529677] [2022-01-31 17:48:30,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1246529677] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:30,326 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:30,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-01-31 17:48:30,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413945558] [2022-01-31 17:48:30,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:30,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-01-31 17:48:30,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:30,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-01-31 17:48:30,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 17:48:30,328 INFO L87 Difference]: Start difference. First operand 695 states and 702 transitions. Second operand has 99 states, 99 states have (on average 1.2323232323232323) internal successors, (122), 98 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) [2022-01-31 17:48:34,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:34,447 INFO L93 Difference]: Finished difference Result 1295 states and 1315 transitions. [2022-01-31 17:48:34,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-31 17:48:34,447 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.2323232323232323) internal successors, (122), 98 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 690 [2022-01-31 17:48:34,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:34,456 INFO L225 Difference]: With dead ends: 1295 [2022-01-31 17:48:34,456 INFO L226 Difference]: Without dead ends: 702 [2022-01-31 17:48:34,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4655 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=14259, Invalid=23571, Unknown=0, NotChecked=0, Total=37830 [2022-01-31 17:48:34,458 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 2574 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 3363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2574 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:34,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 61 Invalid, 3363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2574 Valid, 789 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:48:34,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2022-01-31 17:48:34,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 702. [2022-01-31 17:48:34,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 702 states, 696 states have (on average 1.0114942528735633) internal successors, (704), 696 states have internal predecessors, (704), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:34,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 709 transitions. [2022-01-31 17:48:34,472 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 709 transitions. Word has length 690 [2022-01-31 17:48:34,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:34,472 INFO L470 AbstractCegarLoop]: Abstraction has 702 states and 709 transitions. [2022-01-31 17:48:34,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.2323232323232323) internal successors, (122), 98 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) [2022-01-31 17:48:34,473 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 709 transitions. [2022-01-31 17:48:34,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 698 [2022-01-31 17:48:34,475 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:34,475 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 96, 96, 96, 96, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:34,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-01-31 17:48:34,475 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:34,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:34,476 INFO L85 PathProgramCache]: Analyzing trace with hash -911956041, now seen corresponding path program 96 times [2022-01-31 17:48:34,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:34,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086685267] [2022-01-31 17:48:34,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:34,477 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:34,477 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:34,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:34,508 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:34,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:37,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:37,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:37,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:37,120 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:37,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2086685267] [2022-01-31 17:48:37,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2086685267] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:37,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:37,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-01-31 17:48:37,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995877411] [2022-01-31 17:48:37,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:37,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-01-31 17:48:37,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:37,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-01-31 17:48:37,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 17:48:37,122 INFO L87 Difference]: Start difference. First operand 702 states and 709 transitions. Second operand has 100 states, 100 states have (on average 1.23) internal successors, (123), 99 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) [2022-01-31 17:48:41,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:41,744 INFO L93 Difference]: Finished difference Result 1308 states and 1328 transitions. [2022-01-31 17:48:41,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-31 17:48:41,744 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.23) internal successors, (123), 99 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 697 [2022-01-31 17:48:41,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:41,745 INFO L225 Difference]: With dead ends: 1308 [2022-01-31 17:48:41,745 INFO L226 Difference]: Without dead ends: 709 [2022-01-31 17:48:41,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4752 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=14553, Invalid=24059, Unknown=0, NotChecked=0, Total=38612 [2022-01-31 17:48:41,747 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 3200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 3996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3200 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:41,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 61 Invalid, 3996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3200 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:48:41,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2022-01-31 17:48:41,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 709. [2022-01-31 17:48:41,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 709 states, 703 states have (on average 1.0113798008534851) internal successors, (711), 703 states have internal predecessors, (711), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:41,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 716 transitions. [2022-01-31 17:48:41,758 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 716 transitions. Word has length 697 [2022-01-31 17:48:41,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:41,759 INFO L470 AbstractCegarLoop]: Abstraction has 709 states and 716 transitions. [2022-01-31 17:48:41,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.23) internal successors, (123), 99 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) [2022-01-31 17:48:41,759 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 716 transitions. [2022-01-31 17:48:41,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 705 [2022-01-31 17:48:41,761 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:41,761 INFO L514 BasicCegarLoop]: trace histogram [97, 97, 97, 97, 97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:41,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-01-31 17:48:41,761 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:41,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:41,762 INFO L85 PathProgramCache]: Analyzing trace with hash 2020331236, now seen corresponding path program 97 times [2022-01-31 17:48:41,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:41,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [743183862] [2022-01-31 17:48:41,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:41,763 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:41,763 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:41,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:41,794 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:42,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:44,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:44,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:44,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:44,225 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:44,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [743183862] [2022-01-31 17:48:44,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [743183862] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:44,225 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:44,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-01-31 17:48:44,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37903795] [2022-01-31 17:48:44,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:44,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-01-31 17:48:44,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:44,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-01-31 17:48:44,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 17:48:44,228 INFO L87 Difference]: Start difference. First operand 709 states and 716 transitions. Second operand has 101 states, 101 states have (on average 1.2277227722772277) internal successors, (124), 100 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) [2022-01-31 17:48:49,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:49,019 INFO L93 Difference]: Finished difference Result 1321 states and 1341 transitions. [2022-01-31 17:48:49,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-31 17:48:49,019 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.2277227722772277) internal successors, (124), 100 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 704 [2022-01-31 17:48:49,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:49,020 INFO L225 Difference]: With dead ends: 1321 [2022-01-31 17:48:49,020 INFO L226 Difference]: Without dead ends: 716 [2022-01-31 17:48:49,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4850 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=14850, Invalid=24552, Unknown=0, NotChecked=0, Total=39402 [2022-01-31 17:48:49,022 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 3395 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 4162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3395 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:49,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 51 Invalid, 4162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3395 Valid, 767 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:48:49,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2022-01-31 17:48:49,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 716. [2022-01-31 17:48:49,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 710 states have (on average 1.0112676056338028) internal successors, (718), 710 states have internal predecessors, (718), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:49,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 723 transitions. [2022-01-31 17:48:49,036 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 723 transitions. Word has length 704 [2022-01-31 17:48:49,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:49,036 INFO L470 AbstractCegarLoop]: Abstraction has 716 states and 723 transitions. [2022-01-31 17:48:49,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.2277227722772277) internal successors, (124), 100 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) [2022-01-31 17:48:49,036 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 723 transitions. [2022-01-31 17:48:49,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 712 [2022-01-31 17:48:49,040 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:49,041 INFO L514 BasicCegarLoop]: trace histogram [98, 98, 98, 98, 98, 98, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:49,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-01-31 17:48:49,041 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:49,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:49,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1908409577, now seen corresponding path program 98 times [2022-01-31 17:48:49,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:49,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279234670] [2022-01-31 17:48:49,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:49,044 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:49,044 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:49,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:49,078 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:49,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:52,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:52,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:52,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:52,164 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:52,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [279234670] [2022-01-31 17:48:52,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [279234670] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:52,164 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:52,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-01-31 17:48:52,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540334241] [2022-01-31 17:48:52,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:52,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-01-31 17:48:52,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:52,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-01-31 17:48:52,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 17:48:52,167 INFO L87 Difference]: Start difference. First operand 716 states and 723 transitions. Second operand has 102 states, 102 states have (on average 1.2254901960784315) internal successors, (125), 101 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:56,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:56,847 INFO L93 Difference]: Finished difference Result 1334 states and 1354 transitions. [2022-01-31 17:48:56,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-01-31 17:48:56,847 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.2254901960784315) internal successors, (125), 101 states have internal predecessors, (125), 2 states have call successors, (3), 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 711 [2022-01-31 17:48:56,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:56,848 INFO L225 Difference]: With dead ends: 1334 [2022-01-31 17:48:56,848 INFO L226 Difference]: Without dead ends: 723 [2022-01-31 17:48:56,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4949 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=15150, Invalid=25050, Unknown=0, NotChecked=0, Total=40200 [2022-01-31 17:48:56,850 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 3212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 4004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3212 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:56,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 56 Invalid, 4004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3212 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:48:56,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2022-01-31 17:48:56,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 723. [2022-01-31 17:48:56,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 717 states have (on average 1.0111576011157601) internal successors, (725), 717 states have internal predecessors, (725), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:56,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 730 transitions. [2022-01-31 17:48:56,862 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 730 transitions. Word has length 711 [2022-01-31 17:48:56,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:56,862 INFO L470 AbstractCegarLoop]: Abstraction has 723 states and 730 transitions. [2022-01-31 17:48:56,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.2254901960784315) internal successors, (125), 101 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:56,862 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 730 transitions. [2022-01-31 17:48:56,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 719 [2022-01-31 17:48:56,865 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:56,865 INFO L514 BasicCegarLoop]: trace histogram [99, 99, 99, 99, 99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:56,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-01-31 17:48:56,865 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:56,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:56,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1089113220, now seen corresponding path program 99 times [2022-01-31 17:48:56,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:56,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [634470434] [2022-01-31 17:48:56,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:56,866 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:56,866 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:56,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:56,897 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:57,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:59,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:59,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:59,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:59,247 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:59,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [634470434] [2022-01-31 17:48:59,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [634470434] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:59,247 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:59,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-01-31 17:48:59,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495682534] [2022-01-31 17:48:59,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:59,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-01-31 17:48:59,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:59,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-01-31 17:48:59,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 17:48:59,251 INFO L87 Difference]: Start difference. First operand 723 states and 730 transitions. Second operand has 103 states, 103 states have (on average 1.2233009708737863) internal successors, (126), 102 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:03,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:03,942 INFO L93 Difference]: Finished difference Result 1347 states and 1367 transitions. [2022-01-31 17:49:03,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-01-31 17:49:03,943 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.2233009708737863) internal successors, (126), 102 states have internal predecessors, (126), 2 states have call successors, (3), 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 718 [2022-01-31 17:49:03,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:03,944 INFO L225 Difference]: With dead ends: 1347 [2022-01-31 17:49:03,944 INFO L226 Difference]: Without dead ends: 730 [2022-01-31 17:49:03,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5049 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=15453, Invalid=25553, Unknown=0, NotChecked=0, Total=41006 [2022-01-31 17:49:03,947 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 817 mSolverCounterSat, 2907 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 3724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2907 IncrementalHoareTripleChecker+Valid, 817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:03,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 61 Invalid, 3724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2907 Valid, 817 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:49:03,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2022-01-31 17:49:03,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 730. [2022-01-31 17:49:03,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 724 states have (on average 1.011049723756906) internal successors, (732), 724 states have internal predecessors, (732), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:49:03,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 737 transitions. [2022-01-31 17:49:03,959 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 737 transitions. Word has length 718 [2022-01-31 17:49:03,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:03,959 INFO L470 AbstractCegarLoop]: Abstraction has 730 states and 737 transitions. [2022-01-31 17:49:03,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.2233009708737863) internal successors, (126), 102 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:03,960 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 737 transitions. [2022-01-31 17:49:03,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 726 [2022-01-31 17:49:03,962 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:03,962 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 100, 100, 100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:03,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-01-31 17:49:03,962 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:03,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:03,962 INFO L85 PathProgramCache]: Analyzing trace with hash -176150921, now seen corresponding path program 100 times [2022-01-31 17:49:03,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:03,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [372081065] [2022-01-31 17:49:03,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:03,964 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:03,964 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:03,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:03,995 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:04,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:07,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:07,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:07,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:07,025 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:07,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [372081065] [2022-01-31 17:49:07,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [372081065] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:07,025 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:07,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-01-31 17:49:07,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356825289] [2022-01-31 17:49:07,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:07,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-01-31 17:49:07,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:07,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-01-31 17:49:07,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 17:49:07,029 INFO L87 Difference]: Start difference. First operand 730 states and 737 transitions. Second operand has 104 states, 104 states have (on average 1.2211538461538463) internal successors, (127), 103 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) [2022-01-31 17:49:11,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:11,731 INFO L93 Difference]: Finished difference Result 1360 states and 1380 transitions. [2022-01-31 17:49:11,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-31 17:49:11,731 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 1.2211538461538463) internal successors, (127), 103 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 725 [2022-01-31 17:49:11,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:11,732 INFO L225 Difference]: With dead ends: 1360 [2022-01-31 17:49:11,732 INFO L226 Difference]: Without dead ends: 737 [2022-01-31 17:49:11,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5150 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=15759, Invalid=26061, Unknown=0, NotChecked=0, Total=41820 [2022-01-31 17:49:11,734 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 2968 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 3792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2968 IncrementalHoareTripleChecker+Valid, 824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:11,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 61 Invalid, 3792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2968 Valid, 824 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:49:11,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2022-01-31 17:49:11,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 737. [2022-01-31 17:49:11,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 731 states have (on average 1.0109439124487005) internal successors, (739), 731 states have internal predecessors, (739), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:49:11,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 744 transitions. [2022-01-31 17:49:11,746 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 744 transitions. Word has length 725 [2022-01-31 17:49:11,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:11,746 INFO L470 AbstractCegarLoop]: Abstraction has 737 states and 744 transitions. [2022-01-31 17:49:11,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 1.2211538461538463) internal successors, (127), 103 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) [2022-01-31 17:49:11,746 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 744 transitions. [2022-01-31 17:49:11,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 733 [2022-01-31 17:49:11,748 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:11,748 INFO L514 BasicCegarLoop]: trace histogram [101, 101, 101, 101, 101, 101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:11,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-01-31 17:49:11,749 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:11,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:11,749 INFO L85 PathProgramCache]: Analyzing trace with hash 217641508, now seen corresponding path program 101 times [2022-01-31 17:49:11,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:11,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [910812022] [2022-01-31 17:49:11,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:11,756 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:11,756 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:11,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:11,788 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:12,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:15,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:15,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:15,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:15,022 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:15,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [910812022] [2022-01-31 17:49:15,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [910812022] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:15,023 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:15,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-01-31 17:49:15,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690966012] [2022-01-31 17:49:15,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:15,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-01-31 17:49:15,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:15,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-01-31 17:49:15,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5358, Invalid=5562, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 17:49:15,026 INFO L87 Difference]: Start difference. First operand 737 states and 744 transitions. Second operand has 105 states, 105 states have (on average 1.2190476190476192) internal successors, (128), 104 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) [2022-01-31 17:49:20,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:20,326 INFO L93 Difference]: Finished difference Result 1373 states and 1393 transitions. [2022-01-31 17:49:20,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-01-31 17:49:20,326 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.2190476190476192) internal successors, (128), 104 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 732 [2022-01-31 17:49:20,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:20,327 INFO L225 Difference]: With dead ends: 1373 [2022-01-31 17:49:20,327 INFO L226 Difference]: Without dead ends: 744 [2022-01-31 17:49:20,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5252 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=16068, Invalid=26574, Unknown=0, NotChecked=0, Total=42642 [2022-01-31 17:49:20,329 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 3439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 4270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3439 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:20,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 61 Invalid, 4270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3439 Valid, 831 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:49:20,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2022-01-31 17:49:20,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 744. [2022-01-31 17:49:20,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 738 states have (on average 1.010840108401084) internal successors, (746), 738 states have internal predecessors, (746), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:49:20,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 751 transitions. [2022-01-31 17:49:20,344 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 751 transitions. Word has length 732 [2022-01-31 17:49:20,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:20,344 INFO L470 AbstractCegarLoop]: Abstraction has 744 states and 751 transitions. [2022-01-31 17:49:20,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.2190476190476192) internal successors, (128), 104 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) [2022-01-31 17:49:20,344 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 751 transitions. [2022-01-31 17:49:20,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 740 [2022-01-31 17:49:20,346 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:20,347 INFO L514 BasicCegarLoop]: trace histogram [102, 102, 102, 102, 102, 102, 102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:20,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-01-31 17:49:20,347 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:20,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:20,347 INFO L85 PathProgramCache]: Analyzing trace with hash 882059735, now seen corresponding path program 102 times [2022-01-31 17:49:20,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:20,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [735550708] [2022-01-31 17:49:20,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:20,348 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:20,348 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:20,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:20,380 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:20,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:23,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:23,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:23,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:23,946 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:23,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [735550708] [2022-01-31 17:49:23,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [735550708] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:23,947 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:23,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-01-31 17:49:23,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445489121] [2022-01-31 17:49:23,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:23,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-01-31 17:49:23,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:23,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-01-31 17:49:23,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 17:49:23,949 INFO L87 Difference]: Start difference. First operand 744 states and 751 transitions. Second operand has 106 states, 106 states have (on average 1.2169811320754718) internal successors, (129), 105 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) [2022-01-31 17:49:29,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:29,478 INFO L93 Difference]: Finished difference Result 1386 states and 1406 transitions. [2022-01-31 17:49:29,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-01-31 17:49:29,478 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 1.2169811320754718) internal successors, (129), 105 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 739 [2022-01-31 17:49:29,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:29,479 INFO L225 Difference]: With dead ends: 1386 [2022-01-31 17:49:29,479 INFO L226 Difference]: Without dead ends: 751 [2022-01-31 17:49:29,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5355 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=16380, Invalid=27092, Unknown=0, NotChecked=0, Total=43472 [2022-01-31 17:49:29,481 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 3869 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 4671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3869 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:29,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 51 Invalid, 4671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3869 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:49:29,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2022-01-31 17:49:29,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 751. [2022-01-31 17:49:29,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 745 states have (on average 1.010738255033557) internal successors, (753), 745 states have internal predecessors, (753), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:49:29,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 758 transitions. [2022-01-31 17:49:29,493 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 758 transitions. Word has length 739 [2022-01-31 17:49:29,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:29,493 INFO L470 AbstractCegarLoop]: Abstraction has 751 states and 758 transitions. [2022-01-31 17:49:29,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 1.2169811320754718) internal successors, (129), 105 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) [2022-01-31 17:49:29,493 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 758 transitions. [2022-01-31 17:49:29,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 747 [2022-01-31 17:49:29,496 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:29,496 INFO L514 BasicCegarLoop]: trace histogram [103, 103, 103, 103, 103, 103, 103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:29,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-01-31 17:49:29,496 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:29,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:29,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1042874308, now seen corresponding path program 103 times [2022-01-31 17:49:29,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:29,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [354167038] [2022-01-31 17:49:29,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:29,497 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:29,497 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:29,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:29,554 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:29,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:32,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:32,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:32,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:32,635 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:32,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [354167038] [2022-01-31 17:49:32,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [354167038] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:32,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:32,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-01-31 17:49:32,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272406579] [2022-01-31 17:49:32,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:32,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-01-31 17:49:32,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:32,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-01-31 17:49:32,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 17:49:32,638 INFO L87 Difference]: Start difference. First operand 751 states and 758 transitions. Second operand has 107 states, 107 states have (on average 1.2149532710280373) internal successors, (130), 106 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) [2022-01-31 17:49:38,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:38,386 INFO L93 Difference]: Finished difference Result 1399 states and 1419 transitions. [2022-01-31 17:49:38,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-01-31 17:49:38,386 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.2149532710280373) internal successors, (130), 106 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 746 [2022-01-31 17:49:38,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:38,387 INFO L225 Difference]: With dead ends: 1399 [2022-01-31 17:49:38,387 INFO L226 Difference]: Without dead ends: 758 [2022-01-31 17:49:38,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5459 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=16695, Invalid=27615, Unknown=0, NotChecked=0, Total=44310 [2022-01-31 17:49:38,389 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 3128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 3991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3128 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:38,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 66 Invalid, 3991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3128 Valid, 863 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:49:38,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2022-01-31 17:49:38,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 758. [2022-01-31 17:49:38,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 752 states have (on average 1.0106382978723405) internal successors, (760), 752 states have internal predecessors, (760), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:49:38,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 765 transitions. [2022-01-31 17:49:38,401 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 765 transitions. Word has length 746 [2022-01-31 17:49:38,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:38,401 INFO L470 AbstractCegarLoop]: Abstraction has 758 states and 765 transitions. [2022-01-31 17:49:38,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.2149532710280373) internal successors, (130), 106 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) [2022-01-31 17:49:38,401 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 765 transitions. [2022-01-31 17:49:38,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 754 [2022-01-31 17:49:38,404 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:38,404 INFO L514 BasicCegarLoop]: trace histogram [104, 104, 104, 104, 104, 104, 104, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:38,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-01-31 17:49:38,404 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:38,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:38,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1646724407, now seen corresponding path program 104 times [2022-01-31 17:49:38,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:38,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [781423196] [2022-01-31 17:49:38,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:38,405 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:38,405 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:38,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:38,470 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:38,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:41,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:41,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:41,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:41,055 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:41,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [781423196] [2022-01-31 17:49:41,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [781423196] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:41,055 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:41,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-01-31 17:49:41,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945822785] [2022-01-31 17:49:41,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:41,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-01-31 17:49:41,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:41,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-01-31 17:49:41,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 17:49:41,059 INFO L87 Difference]: Start difference. First operand 758 states and 765 transitions. Second operand has 108 states, 108 states have (on average 1.212962962962963) internal successors, (131), 107 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) [2022-01-31 17:49:46,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:46,715 INFO L93 Difference]: Finished difference Result 1412 states and 1432 transitions. [2022-01-31 17:49:46,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-01-31 17:49:46,715 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 1.212962962962963) internal successors, (131), 107 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 753 [2022-01-31 17:49:46,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:46,716 INFO L225 Difference]: With dead ends: 1412 [2022-01-31 17:49:46,716 INFO L226 Difference]: Without dead ends: 765 [2022-01-31 17:49:46,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5564 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=17013, Invalid=28143, Unknown=0, NotChecked=0, Total=45156 [2022-01-31 17:49:46,719 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 4394 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 5210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4394 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:46,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 51 Invalid, 5210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4394 Valid, 816 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 17:49:46,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2022-01-31 17:49:46,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 765. [2022-01-31 17:49:46,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 765 states, 759 states have (on average 1.010540184453228) internal successors, (767), 759 states have internal predecessors, (767), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:49:46,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 765 states to 765 states and 772 transitions. [2022-01-31 17:49:46,731 INFO L78 Accepts]: Start accepts. Automaton has 765 states and 772 transitions. Word has length 753 [2022-01-31 17:49:46,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:46,731 INFO L470 AbstractCegarLoop]: Abstraction has 765 states and 772 transitions. [2022-01-31 17:49:46,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 1.212962962962963) internal successors, (131), 107 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) [2022-01-31 17:49:46,731 INFO L276 IsEmpty]: Start isEmpty. Operand 765 states and 772 transitions. [2022-01-31 17:49:46,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 761 [2022-01-31 17:49:46,733 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:46,733 INFO L514 BasicCegarLoop]: trace histogram [105, 105, 105, 105, 105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:46,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-01-31 17:49:46,734 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:46,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:46,734 INFO L85 PathProgramCache]: Analyzing trace with hash 76330340, now seen corresponding path program 105 times [2022-01-31 17:49:46,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:46,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1042725612] [2022-01-31 17:49:46,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:46,735 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:46,735 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:46,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:46,797 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:47,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:49,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:49,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:49,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:49,772 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:49,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1042725612] [2022-01-31 17:49:49,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1042725612] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:49,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:49,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-01-31 17:49:49,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253337401] [2022-01-31 17:49:49,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:49,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-01-31 17:49:49,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:49,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-01-31 17:49:49,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5780, Invalid=5992, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 17:49:49,775 INFO L87 Difference]: Start difference. First operand 765 states and 772 transitions. Second operand has 109 states, 109 states have (on average 1.2110091743119267) internal successors, (132), 108 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) [2022-01-31 17:49:55,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:55,248 INFO L93 Difference]: Finished difference Result 1425 states and 1445 transitions. [2022-01-31 17:49:55,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-01-31 17:49:55,248 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 1.2110091743119267) internal successors, (132), 108 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 760 [2022-01-31 17:49:55,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:55,249 INFO L225 Difference]: With dead ends: 1425 [2022-01-31 17:49:55,249 INFO L226 Difference]: Without dead ends: 772 [2022-01-31 17:49:55,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5670 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=17334, Invalid=28676, Unknown=0, NotChecked=0, Total=46010 [2022-01-31 17:49:55,251 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 3429 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 4252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3429 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:55,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 51 Invalid, 4252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3429 Valid, 823 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:49:55,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2022-01-31 17:49:55,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 772. [2022-01-31 17:49:55,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 766 states have (on average 1.010443864229765) internal successors, (774), 766 states have internal predecessors, (774), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:49:55,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 779 transitions. [2022-01-31 17:49:55,263 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 779 transitions. Word has length 760 [2022-01-31 17:49:55,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:55,264 INFO L470 AbstractCegarLoop]: Abstraction has 772 states and 779 transitions. [2022-01-31 17:49:55,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 1.2110091743119267) internal successors, (132), 108 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) [2022-01-31 17:49:55,264 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 779 transitions. [2022-01-31 17:49:55,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 768 [2022-01-31 17:49:55,266 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:55,266 INFO L514 BasicCegarLoop]: trace histogram [106, 106, 106, 106, 106, 106, 106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:55,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-01-31 17:49:55,267 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:55,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:55,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1449769111, now seen corresponding path program 106 times [2022-01-31 17:49:55,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:55,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [326729012] [2022-01-31 17:49:55,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:55,272 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:55,273 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:55,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:55,313 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:55,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:58,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:58,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:58,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:58,340 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:58,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [326729012] [2022-01-31 17:49:58,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [326729012] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:58,340 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:58,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-01-31 17:49:58,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460709795] [2022-01-31 17:49:58,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:58,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-01-31 17:49:58,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:58,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-01-31 17:49:58,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2022-01-31 17:49:58,344 INFO L87 Difference]: Start difference. First operand 772 states and 779 transitions. Second operand has 110 states, 110 states have (on average 1.209090909090909) internal successors, (133), 109 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) [2022-01-31 17:50:05,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:50:05,104 INFO L93 Difference]: Finished difference Result 1438 states and 1458 transitions. [2022-01-31 17:50:05,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-01-31 17:50:05,104 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 1.209090909090909) internal successors, (133), 109 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 767 [2022-01-31 17:50:05,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:50:05,105 INFO L225 Difference]: With dead ends: 1438 [2022-01-31 17:50:05,106 INFO L226 Difference]: Without dead ends: 779 [2022-01-31 17:50:05,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5777 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=17658, Invalid=29214, Unknown=0, NotChecked=0, Total=46872 [2022-01-31 17:50:05,108 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 3711 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 4541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3711 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:50:05,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 51 Invalid, 4541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3711 Valid, 830 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 17:50:05,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2022-01-31 17:50:05,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 779. [2022-01-31 17:50:05,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 779 states, 773 states have (on average 1.0103492884864165) internal successors, (781), 773 states have internal predecessors, (781), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:50:05,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 786 transitions. [2022-01-31 17:50:05,120 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 786 transitions. Word has length 767 [2022-01-31 17:50:05,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:50:05,120 INFO L470 AbstractCegarLoop]: Abstraction has 779 states and 786 transitions. [2022-01-31 17:50:05,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 1.209090909090909) internal successors, (133), 109 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) [2022-01-31 17:50:05,121 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 786 transitions. [2022-01-31 17:50:05,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 775 [2022-01-31 17:50:05,123 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:50:05,123 INFO L514 BasicCegarLoop]: trace histogram [107, 107, 107, 107, 107, 107, 107, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:50:05,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-01-31 17:50:05,124 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:50:05,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:50:05,124 INFO L85 PathProgramCache]: Analyzing trace with hash 2125861636, now seen corresponding path program 107 times [2022-01-31 17:50:05,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:50:05,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656701251] [2022-01-31 17:50:05,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:50:05,125 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:50:05,125 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:50:05,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:50:05,170 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:50:05,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:08,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:50:08,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:08,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:50:08,441 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:50:08,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1656701251] [2022-01-31 17:50:08,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1656701251] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:50:08,441 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:50:08,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-01-31 17:50:08,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467040895] [2022-01-31 17:50:08,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:50:08,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-01-31 17:50:08,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:50:08,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-01-31 17:50:08,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5997, Invalid=6213, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 17:50:08,444 INFO L87 Difference]: Start difference. First operand 779 states and 786 transitions. Second operand has 111 states, 111 states have (on average 1.2072072072072073) internal successors, (134), 110 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) [2022-01-31 17:50:14,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:50:14,009 INFO L93 Difference]: Finished difference Result 1451 states and 1471 transitions. [2022-01-31 17:50:14,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-01-31 17:50:14,009 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 1.2072072072072073) internal successors, (134), 110 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 774 [2022-01-31 17:50:14,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:50:14,010 INFO L225 Difference]: With dead ends: 1451 [2022-01-31 17:50:14,010 INFO L226 Difference]: Without dead ends: 786 [2022-01-31 17:50:14,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5885 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=17985, Invalid=29757, Unknown=0, NotChecked=0, Total=47742 [2022-01-31 17:50:14,012 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 2759 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 3668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2759 IncrementalHoareTripleChecker+Valid, 909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:50:14,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 71 Invalid, 3668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2759 Valid, 909 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:50:14,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2022-01-31 17:50:14,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 786. [2022-01-31 17:50:14,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 780 states have (on average 1.0102564102564102) internal successors, (788), 780 states have internal predecessors, (788), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:50:14,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 793 transitions. [2022-01-31 17:50:14,025 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 793 transitions. Word has length 774 [2022-01-31 17:50:14,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:50:14,025 INFO L470 AbstractCegarLoop]: Abstraction has 786 states and 793 transitions. [2022-01-31 17:50:14,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 1.2072072072072073) internal successors, (134), 110 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) [2022-01-31 17:50:14,025 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 793 transitions. [2022-01-31 17:50:14,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 782 [2022-01-31 17:50:14,027 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:50:14,028 INFO L514 BasicCegarLoop]: trace histogram [108, 108, 108, 108, 108, 108, 108, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:50:14,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-01-31 17:50:14,028 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:50:14,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:50:14,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1962327049, now seen corresponding path program 108 times [2022-01-31 17:50:14,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:50:14,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1946850567] [2022-01-31 17:50:14,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:50:14,029 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:50:14,029 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:50:14,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:50:14,071 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:50:14,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:17,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:50:17,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:17,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:50:17,186 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:50:17,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1946850567] [2022-01-31 17:50:17,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1946850567] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:50:17,186 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:50:17,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-01-31 17:50:17,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667239658] [2022-01-31 17:50:17,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:50:17,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-01-31 17:50:17,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:50:17,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-01-31 17:50:17,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2022-01-31 17:50:17,189 INFO L87 Difference]: Start difference. First operand 786 states and 793 transitions. Second operand has 112 states, 112 states have (on average 1.2053571428571428) internal successors, (135), 111 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) [2022-01-31 17:50:23,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:50:23,540 INFO L93 Difference]: Finished difference Result 1464 states and 1484 transitions. [2022-01-31 17:50:23,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-01-31 17:50:23,540 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 1.2053571428571428) internal successors, (135), 111 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 781 [2022-01-31 17:50:23,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:50:23,541 INFO L225 Difference]: With dead ends: 1464 [2022-01-31 17:50:23,541 INFO L226 Difference]: Without dead ends: 793 [2022-01-31 17:50:23,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5994 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=18315, Invalid=30305, Unknown=0, NotChecked=0, Total=48620 [2022-01-31 17:50:23,543 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 3926 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 4734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3926 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:50:23,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 4734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3926 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 17:50:23,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2022-01-31 17:50:23,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 793. [2022-01-31 17:50:23,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 787 states have (on average 1.0101651842439645) internal successors, (795), 787 states have internal predecessors, (795), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:50:23,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 800 transitions. [2022-01-31 17:50:23,556 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 800 transitions. Word has length 781 [2022-01-31 17:50:23,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:50:23,556 INFO L470 AbstractCegarLoop]: Abstraction has 793 states and 800 transitions. [2022-01-31 17:50:23,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 1.2053571428571428) internal successors, (135), 111 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) [2022-01-31 17:50:23,556 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 800 transitions. [2022-01-31 17:50:23,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 789 [2022-01-31 17:50:23,559 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:50:23,559 INFO L514 BasicCegarLoop]: trace histogram [109, 109, 109, 109, 109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:50:23,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-01-31 17:50:23,559 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:50:23,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:50:23,559 INFO L85 PathProgramCache]: Analyzing trace with hash -642312028, now seen corresponding path program 109 times [2022-01-31 17:50:23,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:50:23,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201622761] [2022-01-31 17:50:23,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:50:23,560 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:50:23,561 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:50:23,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:50:23,604 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:50:23,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:27,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:50:27,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:27,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:50:27,443 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:50:27,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201622761] [2022-01-31 17:50:27,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [201622761] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:50:27,443 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:50:27,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-01-31 17:50:27,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778313934] [2022-01-31 17:50:27,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:50:27,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-01-31 17:50:27,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:50:27,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-01-31 17:50:27,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6218, Invalid=6438, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 17:50:27,446 INFO L87 Difference]: Start difference. First operand 793 states and 800 transitions. Second operand has 113 states, 113 states have (on average 1.2035398230088497) internal successors, (136), 112 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) [2022-01-31 17:50:33,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:50:33,981 INFO L93 Difference]: Finished difference Result 1477 states and 1497 transitions. [2022-01-31 17:50:33,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-01-31 17:50:33,981 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 1.2035398230088497) internal successors, (136), 112 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 788 [2022-01-31 17:50:33,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:50:33,982 INFO L225 Difference]: With dead ends: 1477 [2022-01-31 17:50:33,982 INFO L226 Difference]: Without dead ends: 800 [2022-01-31 17:50:33,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6104 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=18648, Invalid=30858, Unknown=0, NotChecked=0, Total=49506 [2022-01-31 17:50:33,984 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 3810 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 4643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3810 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:50:33,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 46 Invalid, 4643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3810 Valid, 833 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:50:33,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2022-01-31 17:50:33,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 800. [2022-01-31 17:50:33,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 794 states have (on average 1.0100755667506298) internal successors, (802), 794 states have internal predecessors, (802), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:50:33,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 807 transitions. [2022-01-31 17:50:33,997 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 807 transitions. Word has length 788 [2022-01-31 17:50:33,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:50:33,997 INFO L470 AbstractCegarLoop]: Abstraction has 800 states and 807 transitions. [2022-01-31 17:50:33,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 1.2035398230088497) internal successors, (136), 112 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) [2022-01-31 17:50:33,997 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 807 transitions. [2022-01-31 17:50:34,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 796 [2022-01-31 17:50:34,000 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:50:34,000 INFO L514 BasicCegarLoop]: trace histogram [110, 110, 110, 110, 110, 110, 110, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:50:34,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-01-31 17:50:34,000 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:50:34,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:50:34,000 INFO L85 PathProgramCache]: Analyzing trace with hash -80500905, now seen corresponding path program 110 times [2022-01-31 17:50:34,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:50:34,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [826329602] [2022-01-31 17:50:34,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:50:34,001 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:50:34,001 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:50:34,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:50:34,044 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:50:34,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:37,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:50:37,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:37,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:50:37,171 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:50:37,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [826329602] [2022-01-31 17:50:37,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [826329602] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:50:37,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:50:37,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-01-31 17:50:37,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200033051] [2022-01-31 17:50:37,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:50:37,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-01-31 17:50:37,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:50:37,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-01-31 17:50:37,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2022-01-31 17:50:37,174 INFO L87 Difference]: Start difference. First operand 800 states and 807 transitions. Second operand has 114 states, 114 states have (on average 1.2017543859649122) internal successors, (137), 113 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) [2022-01-31 17:50:43,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:50:43,245 INFO L93 Difference]: Finished difference Result 1490 states and 1510 transitions. [2022-01-31 17:50:43,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-01-31 17:50:43,246 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 1.2017543859649122) internal successors, (137), 113 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 795 [2022-01-31 17:50:43,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:50:43,247 INFO L225 Difference]: With dead ends: 1490 [2022-01-31 17:50:43,247 INFO L226 Difference]: Without dead ends: 807 [2022-01-31 17:50:43,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6215 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=18984, Invalid=31416, Unknown=0, NotChecked=0, Total=50400 [2022-01-31 17:50:43,252 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 3518 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 4412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3518 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:50:43,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 61 Invalid, 4412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3518 Valid, 894 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:50:43,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2022-01-31 17:50:43,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 807. [2022-01-31 17:50:43,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 801 states have (on average 1.0099875156054932) internal successors, (809), 801 states have internal predecessors, (809), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:50:43,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 814 transitions. [2022-01-31 17:50:43,265 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 814 transitions. Word has length 795 [2022-01-31 17:50:43,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:50:43,265 INFO L470 AbstractCegarLoop]: Abstraction has 807 states and 814 transitions. [2022-01-31 17:50:43,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 1.2017543859649122) internal successors, (137), 113 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) [2022-01-31 17:50:43,265 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 814 transitions. [2022-01-31 17:50:43,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 803 [2022-01-31 17:50:43,268 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:50:43,269 INFO L514 BasicCegarLoop]: trace histogram [111, 111, 111, 111, 111, 111, 111, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:50:43,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-01-31 17:50:43,270 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:50:43,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:50:43,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1898038852, now seen corresponding path program 111 times [2022-01-31 17:50:43,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:50:43,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [124093021] [2022-01-31 17:50:43,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:50:43,271 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:50:43,271 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:50:43,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:50:43,314 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:50:43,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:46,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:50:46,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:46,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:50:46,734 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:50:46,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [124093021] [2022-01-31 17:50:46,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [124093021] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:50:46,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:50:46,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2022-01-31 17:50:46,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397975249] [2022-01-31 17:50:46,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:50:46,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-01-31 17:50:46,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:50:46,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-01-31 17:50:46,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6443, Invalid=6667, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 17:50:46,737 INFO L87 Difference]: Start difference. First operand 807 states and 814 transitions. Second operand has 115 states, 115 states have (on average 1.2) internal successors, (138), 114 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:53,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:50:53,129 INFO L93 Difference]: Finished difference Result 1503 states and 1523 transitions. [2022-01-31 17:50:53,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-01-31 17:50:53,129 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 1.2) internal successors, (138), 114 states have internal predecessors, (138), 2 states have call successors, (3), 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 802 [2022-01-31 17:50:53,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:50:53,131 INFO L225 Difference]: With dead ends: 1503 [2022-01-31 17:50:53,131 INFO L226 Difference]: Without dead ends: 814 [2022-01-31 17:50:53,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6327 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=19323, Invalid=31979, Unknown=0, NotChecked=0, Total=51302 [2022-01-31 17:50:53,133 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 3866 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 4785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3866 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:50:53,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 66 Invalid, 4785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3866 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:50:53,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2022-01-31 17:50:53,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 814. [2022-01-31 17:50:53,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 808 states have (on average 1.00990099009901) internal successors, (816), 808 states have internal predecessors, (816), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:50:53,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 821 transitions. [2022-01-31 17:50:53,146 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 821 transitions. Word has length 802 [2022-01-31 17:50:53,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:50:53,147 INFO L470 AbstractCegarLoop]: Abstraction has 814 states and 821 transitions. [2022-01-31 17:50:53,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 1.2) internal successors, (138), 114 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:53,147 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 821 transitions. [2022-01-31 17:50:53,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 810 [2022-01-31 17:50:53,150 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:50:53,150 INFO L514 BasicCegarLoop]: trace histogram [112, 112, 112, 112, 112, 112, 112, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:50:53,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-01-31 17:50:53,150 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:50:53,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:50:53,151 INFO L85 PathProgramCache]: Analyzing trace with hash 60220087, now seen corresponding path program 112 times [2022-01-31 17:50:53,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:50:53,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1484951178] [2022-01-31 17:50:53,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:50:53,152 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:50:53,152 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:50:53,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:50:53,198 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:50:53,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:57,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:50:57,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:57,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:50:57,261 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:50:57,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1484951178] [2022-01-31 17:50:57,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1484951178] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:50:57,261 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:50:57,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2022-01-31 17:50:57,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255958590] [2022-01-31 17:50:57,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:50:57,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-01-31 17:50:57,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:50:57,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-01-31 17:50:57,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2022-01-31 17:50:57,263 INFO L87 Difference]: Start difference. First operand 814 states and 821 transitions. Second operand has 116 states, 116 states have (on average 1.1982758620689655) internal successors, (139), 115 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:03,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:51:03,684 INFO L93 Difference]: Finished difference Result 1516 states and 1536 transitions. [2022-01-31 17:51:03,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-01-31 17:51:03,685 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.1982758620689655) internal successors, (139), 115 states have internal predecessors, (139), 2 states have call successors, (3), 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 809 [2022-01-31 17:51:03,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:51:03,700 INFO L225 Difference]: With dead ends: 1516 [2022-01-31 17:51:03,700 INFO L226 Difference]: Without dead ends: 821 [2022-01-31 17:51:03,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6440 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=19665, Invalid=32547, Unknown=0, NotChecked=0, Total=52212 [2022-01-31 17:51:03,702 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 3599 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 4561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3599 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:51:03,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 76 Invalid, 4561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3599 Valid, 962 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 17:51:03,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2022-01-31 17:51:03,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 821. [2022-01-31 17:51:03,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 815 states have (on average 1.0098159509202453) internal successors, (823), 815 states have internal predecessors, (823), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:51:03,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 828 transitions. [2022-01-31 17:51:03,715 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 828 transitions. Word has length 809 [2022-01-31 17:51:03,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:51:03,716 INFO L470 AbstractCegarLoop]: Abstraction has 821 states and 828 transitions. [2022-01-31 17:51:03,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 1.1982758620689655) internal successors, (139), 115 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:03,716 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 828 transitions. [2022-01-31 17:51:03,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 817 [2022-01-31 17:51:03,719 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:51:03,719 INFO L514 BasicCegarLoop]: trace histogram [113, 113, 113, 113, 113, 113, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:51:03,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2022-01-31 17:51:03,719 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:51:03,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:51:03,719 INFO L85 PathProgramCache]: Analyzing trace with hash -284681244, now seen corresponding path program 113 times [2022-01-31 17:51:03,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:51:03,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [621128652] [2022-01-31 17:51:03,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:51:03,720 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:51:03,720 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:51:03,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:51:03,767 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:51:04,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:07,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:51:07,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:07,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:51:07,433 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:51:07,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [621128652] [2022-01-31 17:51:07,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [621128652] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:51:07,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:51:07,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2022-01-31 17:51:07,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421715217] [2022-01-31 17:51:07,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:51:07,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-01-31 17:51:07,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:51:07,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-01-31 17:51:07,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6672, Invalid=6900, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 17:51:07,437 INFO L87 Difference]: Start difference. First operand 821 states and 828 transitions. Second operand has 117 states, 117 states have (on average 1.1965811965811965) internal successors, (140), 116 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) [2022-01-31 17:51:13,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:51:13,822 INFO L93 Difference]: Finished difference Result 1529 states and 1549 transitions. [2022-01-31 17:51:13,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-01-31 17:51:13,822 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 1.1965811965811965) internal successors, (140), 116 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 816 [2022-01-31 17:51:13,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:51:13,823 INFO L225 Difference]: With dead ends: 1529 [2022-01-31 17:51:13,823 INFO L226 Difference]: Without dead ends: 828 [2022-01-31 17:51:13,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6554 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=20010, Invalid=33120, Unknown=0, NotChecked=0, Total=53130 [2022-01-31 17:51:13,826 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 3807 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 4704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3807 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:51:13,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 56 Invalid, 4704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3807 Valid, 897 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:51:13,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2022-01-31 17:51:13,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 828. [2022-01-31 17:51:13,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 822 states have (on average 1.0097323600973236) internal successors, (830), 822 states have internal predecessors, (830), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:51:13,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 835 transitions. [2022-01-31 17:51:13,839 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 835 transitions. Word has length 816 [2022-01-31 17:51:13,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:51:13,839 INFO L470 AbstractCegarLoop]: Abstraction has 828 states and 835 transitions. [2022-01-31 17:51:13,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 1.1965811965811965) internal successors, (140), 116 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) [2022-01-31 17:51:13,839 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 835 transitions. [2022-01-31 17:51:13,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 824 [2022-01-31 17:51:13,842 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:51:13,842 INFO L514 BasicCegarLoop]: trace histogram [114, 114, 114, 114, 114, 114, 114, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:51:13,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-01-31 17:51:13,842 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:51:13,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:51:13,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1113650711, now seen corresponding path program 114 times [2022-01-31 17:51:13,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:51:13,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1297076214] [2022-01-31 17:51:13,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:51:13,843 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:51:13,843 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:51:13,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:51:13,890 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:51:14,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:17,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:51:17,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:17,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:51:17,635 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:51:17,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1297076214] [2022-01-31 17:51:17,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1297076214] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:51:17,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:51:17,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2022-01-31 17:51:17,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775999615] [2022-01-31 17:51:17,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:51:17,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-01-31 17:51:17,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:51:17,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-01-31 17:51:17,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2022-01-31 17:51:17,639 INFO L87 Difference]: Start difference. First operand 828 states and 835 transitions. Second operand has 118 states, 118 states have (on average 1.194915254237288) internal successors, (141), 117 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) [2022-01-31 17:51:24,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:51:24,443 INFO L93 Difference]: Finished difference Result 1542 states and 1562 transitions. [2022-01-31 17:51:24,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-01-31 17:51:24,443 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 1.194915254237288) internal successors, (141), 117 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 823 [2022-01-31 17:51:24,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:51:24,444 INFO L225 Difference]: With dead ends: 1542 [2022-01-31 17:51:24,444 INFO L226 Difference]: Without dead ends: 835 [2022-01-31 17:51:24,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6669 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=20358, Invalid=33698, Unknown=0, NotChecked=0, Total=54056 [2022-01-31 17:51:24,446 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 3824 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 4728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3824 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:51:24,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 56 Invalid, 4728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3824 Valid, 904 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:51:24,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2022-01-31 17:51:24,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 835. [2022-01-31 17:51:24,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 829 states have (on average 1.0096501809408926) internal successors, (837), 829 states have internal predecessors, (837), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:51:24,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 842 transitions. [2022-01-31 17:51:24,460 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 842 transitions. Word has length 823 [2022-01-31 17:51:24,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:51:24,460 INFO L470 AbstractCegarLoop]: Abstraction has 835 states and 842 transitions. [2022-01-31 17:51:24,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 1.194915254237288) internal successors, (141), 117 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) [2022-01-31 17:51:24,460 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 842 transitions. [2022-01-31 17:51:24,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 831 [2022-01-31 17:51:24,512 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:51:24,512 INFO L514 BasicCegarLoop]: trace histogram [115, 115, 115, 115, 115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:51:24,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-01-31 17:51:24,512 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:51:24,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:51:24,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1811683716, now seen corresponding path program 115 times [2022-01-31 17:51:24,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:51:24,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1471029268] [2022-01-31 17:51:24,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:51:24,513 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:51:24,513 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:51:24,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:51:24,562 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:51:24,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:28,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:51:28,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:28,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:51:28,610 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:51:28,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1471029268] [2022-01-31 17:51:28,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1471029268] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:51:28,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:51:28,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2022-01-31 17:51:28,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115542365] [2022-01-31 17:51:28,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:51:28,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-01-31 17:51:28,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:51:28,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-01-31 17:51:28,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6905, Invalid=7137, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 17:51:28,614 INFO L87 Difference]: Start difference. First operand 835 states and 842 transitions. Second operand has 119 states, 119 states have (on average 1.1932773109243697) internal successors, (142), 118 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) [2022-01-31 17:51:36,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:51:36,798 INFO L93 Difference]: Finished difference Result 1555 states and 1575 transitions. [2022-01-31 17:51:36,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-01-31 17:51:36,798 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 1.1932773109243697) internal successors, (142), 118 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 830 [2022-01-31 17:51:36,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:51:36,812 INFO L225 Difference]: With dead ends: 1555 [2022-01-31 17:51:36,812 INFO L226 Difference]: Without dead ends: 842 [2022-01-31 17:51:36,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6785 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=20709, Invalid=34281, Unknown=0, NotChecked=0, Total=54990 [2022-01-31 17:51:36,814 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 929 mSolverCounterSat, 3700 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 4629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3700 IncrementalHoareTripleChecker+Valid, 929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:51:36,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 61 Invalid, 4629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3700 Valid, 929 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 17:51:36,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2022-01-31 17:51:36,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 842. [2022-01-31 17:51:36,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 836 states have (on average 1.0095693779904307) internal successors, (844), 836 states have internal predecessors, (844), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:51:36,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 849 transitions. [2022-01-31 17:51:36,848 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 849 transitions. Word has length 830 [2022-01-31 17:51:36,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:51:36,849 INFO L470 AbstractCegarLoop]: Abstraction has 842 states and 849 transitions. [2022-01-31 17:51:36,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 1.1932773109243697) internal successors, (142), 118 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) [2022-01-31 17:51:36,849 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 849 transitions. [2022-01-31 17:51:36,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 838 [2022-01-31 17:51:36,852 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:51:36,852 INFO L514 BasicCegarLoop]: trace histogram [116, 116, 116, 116, 116, 116, 116, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:51:36,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-01-31 17:51:36,852 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:51:36,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:51:36,853 INFO L85 PathProgramCache]: Analyzing trace with hash 2000675191, now seen corresponding path program 116 times [2022-01-31 17:51:36,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:51:36,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1224008998] [2022-01-31 17:51:36,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:51:36,854 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:51:36,854 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:51:36,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:51:36,966 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:51:37,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:40,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:51:40,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:40,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:51:40,958 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:51:40,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1224008998] [2022-01-31 17:51:40,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1224008998] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:51:40,958 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:51:40,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2022-01-31 17:51:40,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622359033] [2022-01-31 17:51:40,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:51:40,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-01-31 17:51:40,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:51:40,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-01-31 17:51:40,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2022-01-31 17:51:40,962 INFO L87 Difference]: Start difference. First operand 842 states and 849 transitions. Second operand has 120 states, 120 states have (on average 1.1916666666666667) internal successors, (143), 119 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) [2022-01-31 17:51:49,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:51:49,194 INFO L93 Difference]: Finished difference Result 1568 states and 1588 transitions. [2022-01-31 17:51:49,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-01-31 17:51:49,194 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 1.1916666666666667) internal successors, (143), 119 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 837 [2022-01-31 17:51:49,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:51:49,195 INFO L225 Difference]: With dead ends: 1568 [2022-01-31 17:51:49,195 INFO L226 Difference]: Without dead ends: 849 [2022-01-31 17:51:49,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6902 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=21063, Invalid=34869, Unknown=0, NotChecked=0, Total=55932 [2022-01-31 17:51:49,198 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 954 mSolverCounterSat, 3473 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 4427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3473 IncrementalHoareTripleChecker+Valid, 954 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:51:49,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 66 Invalid, 4427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3473 Valid, 954 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 17:51:49,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2022-01-31 17:51:49,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 849. [2022-01-31 17:51:49,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 843 states have (on average 1.0094899169632265) internal successors, (851), 843 states have internal predecessors, (851), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:51:49,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 856 transitions. [2022-01-31 17:51:49,211 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 856 transitions. Word has length 837 [2022-01-31 17:51:49,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:51:49,211 INFO L470 AbstractCegarLoop]: Abstraction has 849 states and 856 transitions. [2022-01-31 17:51:49,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 1.1916666666666667) internal successors, (143), 119 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) [2022-01-31 17:51:49,211 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 856 transitions. [2022-01-31 17:51:49,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 845 [2022-01-31 17:51:49,214 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:51:49,215 INFO L514 BasicCegarLoop]: trace histogram [117, 117, 117, 117, 117, 117, 117, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:51:49,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-01-31 17:51:49,215 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:51:49,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:51:49,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1894793436, now seen corresponding path program 117 times [2022-01-31 17:51:49,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:51:49,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [397864744] [2022-01-31 17:51:49,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:51:49,216 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:51:49,216 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:51:49,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:51:49,265 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:51:49,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:53,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:51:53,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:53,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:51:53,537 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:51:53,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [397864744] [2022-01-31 17:51:53,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [397864744] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:51:53,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:51:53,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [121] imperfect sequences [] total 121 [2022-01-31 17:51:53,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890854096] [2022-01-31 17:51:53,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:51:53,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-01-31 17:51:53,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:51:53,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-01-31 17:51:53,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7142, Invalid=7378, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 17:51:53,540 INFO L87 Difference]: Start difference. First operand 849 states and 856 transitions. Second operand has 121 states, 121 states have (on average 1.1900826446280992) internal successors, (144), 120 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) [2022-01-31 17:52:00,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:52:00,887 INFO L93 Difference]: Finished difference Result 1581 states and 1601 transitions. [2022-01-31 17:52:00,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-01-31 17:52:00,887 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 1.1900826446280992) internal successors, (144), 120 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 844 [2022-01-31 17:52:00,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:52:00,888 INFO L225 Difference]: With dead ends: 1581 [2022-01-31 17:52:00,888 INFO L226 Difference]: Without dead ends: 856 [2022-01-31 17:52:00,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7020 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=21420, Invalid=35462, Unknown=0, NotChecked=0, Total=56882 [2022-01-31 17:52:00,891 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 3738 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 4699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3738 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:52:00,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 66 Invalid, 4699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3738 Valid, 961 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 17:52:00,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2022-01-31 17:52:00,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 856. [2022-01-31 17:52:00,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 850 states have (on average 1.0094117647058825) internal successors, (858), 850 states have internal predecessors, (858), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:52:00,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 863 transitions. [2022-01-31 17:52:00,904 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 863 transitions. Word has length 844 [2022-01-31 17:52:00,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:52:00,904 INFO L470 AbstractCegarLoop]: Abstraction has 856 states and 863 transitions. [2022-01-31 17:52:00,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 1.1900826446280992) internal successors, (144), 120 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) [2022-01-31 17:52:00,904 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 863 transitions. [2022-01-31 17:52:00,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 852 [2022-01-31 17:52:00,908 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:52:00,908 INFO L514 BasicCegarLoop]: trace histogram [118, 118, 118, 118, 118, 118, 118, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:52:00,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2022-01-31 17:52:00,908 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:52:00,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:52:00,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1667343575, now seen corresponding path program 118 times [2022-01-31 17:52:00,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:52:00,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611926181] [2022-01-31 17:52:00,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:52:00,910 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:52:00,910 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:52:00,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:52:00,962 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:52:01,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:05,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:52:05,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:05,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:52:05,272 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:52:05,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611926181] [2022-01-31 17:52:05,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1611926181] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:52:05,272 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:52:05,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2022-01-31 17:52:05,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710053436] [2022-01-31 17:52:05,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:52:05,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-01-31 17:52:05,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:52:05,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-01-31 17:52:05,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2022-01-31 17:52:05,274 INFO L87 Difference]: Start difference. First operand 856 states and 863 transitions. Second operand has 122 states, 122 states have (on average 1.1885245901639345) internal successors, (145), 121 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:12,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:52:12,872 INFO L93 Difference]: Finished difference Result 1594 states and 1614 transitions. [2022-01-31 17:52:12,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-01-31 17:52:12,873 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 1.1885245901639345) internal successors, (145), 121 states have internal predecessors, (145), 2 states have call successors, (3), 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 851 [2022-01-31 17:52:12,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:52:12,874 INFO L225 Difference]: With dead ends: 1594 [2022-01-31 17:52:12,874 INFO L226 Difference]: Without dead ends: 863 [2022-01-31 17:52:12,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7139 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=21780, Invalid=36060, Unknown=0, NotChecked=0, Total=57840 [2022-01-31 17:52:12,877 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 932 mSolverCounterSat, 3900 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 4832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3900 IncrementalHoareTripleChecker+Valid, 932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:52:12,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 56 Invalid, 4832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3900 Valid, 932 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 17:52:12,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2022-01-31 17:52:12,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 863. [2022-01-31 17:52:12,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 857 states have (on average 1.0093348891481915) internal successors, (865), 857 states have internal predecessors, (865), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:52:12,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 870 transitions. [2022-01-31 17:52:12,891 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 870 transitions. Word has length 851 [2022-01-31 17:52:12,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:52:12,891 INFO L470 AbstractCegarLoop]: Abstraction has 863 states and 870 transitions. [2022-01-31 17:52:12,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 1.1885245901639345) internal successors, (145), 121 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:12,892 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 870 transitions. [2022-01-31 17:52:12,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 859 [2022-01-31 17:52:12,895 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:52:12,895 INFO L514 BasicCegarLoop]: trace histogram [119, 119, 119, 119, 119, 119, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:52:12,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2022-01-31 17:52:12,895 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:52:12,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:52:12,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1378546492, now seen corresponding path program 119 times [2022-01-31 17:52:12,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:52:12,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [618736839] [2022-01-31 17:52:12,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:52:12,896 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:52:12,896 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:52:12,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:52:12,958 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:52:13,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:17,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:52:17,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:17,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:52:17,053 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:52:17,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [618736839] [2022-01-31 17:52:17,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [618736839] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:52:17,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:52:17,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2022-01-31 17:52:17,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540245002] [2022-01-31 17:52:17,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:52:17,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-01-31 17:52:17,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:52:17,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-01-31 17:52:17,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7383, Invalid=7623, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 17:52:17,056 INFO L87 Difference]: Start difference. First operand 863 states and 870 transitions. Second operand has 123 states, 123 states have (on average 1.1869918699186992) internal successors, (146), 122 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:26,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:52:26,492 INFO L93 Difference]: Finished difference Result 1607 states and 1627 transitions. [2022-01-31 17:52:26,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-01-31 17:52:26,492 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.1869918699186992) internal successors, (146), 122 states have internal predecessors, (146), 2 states have call successors, (3), 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 858 [2022-01-31 17:52:26,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:52:26,508 INFO L225 Difference]: With dead ends: 1607 [2022-01-31 17:52:26,508 INFO L226 Difference]: Without dead ends: 870 [2022-01-31 17:52:26,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7259 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=22143, Invalid=36663, Unknown=0, NotChecked=0, Total=58806 [2022-01-31 17:52:26,510 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 885 mSolverCounterSat, 4502 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 5387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4502 IncrementalHoareTripleChecker+Valid, 885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:52:26,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 5387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4502 Valid, 885 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 17:52:26,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2022-01-31 17:52:26,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 870. [2022-01-31 17:52:26,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 864 states have (on average 1.0092592592592593) internal successors, (872), 864 states have internal predecessors, (872), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:52:26,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 877 transitions. [2022-01-31 17:52:26,604 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 877 transitions. Word has length 858 [2022-01-31 17:52:26,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:52:26,604 INFO L470 AbstractCegarLoop]: Abstraction has 870 states and 877 transitions. [2022-01-31 17:52:26,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.1869918699186992) internal successors, (146), 122 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:26,605 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 877 transitions. [2022-01-31 17:52:26,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 866 [2022-01-31 17:52:26,608 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:52:26,608 INFO L514 BasicCegarLoop]: trace histogram [120, 120, 120, 120, 120, 120, 120, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:52:26,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2022-01-31 17:52:26,608 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:52:26,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:52:26,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1451999177, now seen corresponding path program 120 times [2022-01-31 17:52:26,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:52:26,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [281808658] [2022-01-31 17:52:26,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:52:26,609 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:52:26,609 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:52:26,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:52:26,671 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:52:26,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:30,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:52:30,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:30,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:52:30,671 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:52:30,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [281808658] [2022-01-31 17:52:30,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [281808658] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:52:30,671 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:52:30,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2022-01-31 17:52:30,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69002357] [2022-01-31 17:52:30,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:52:30,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-01-31 17:52:30,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:52:30,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-01-31 17:52:30,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7505, Invalid=7747, Unknown=0, NotChecked=0, Total=15252 [2022-01-31 17:52:30,675 INFO L87 Difference]: Start difference. First operand 870 states and 877 transitions. Second operand has 124 states, 124 states have (on average 1.185483870967742) internal successors, (147), 123 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:38,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:52:38,974 INFO L93 Difference]: Finished difference Result 1620 states and 1640 transitions. [2022-01-31 17:52:38,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-01-31 17:52:38,975 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 1.185483870967742) internal successors, (147), 123 states have internal predecessors, (147), 2 states have call successors, (3), 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 865 [2022-01-31 17:52:38,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:52:38,976 INFO L225 Difference]: With dead ends: 1620 [2022-01-31 17:52:38,976 INFO L226 Difference]: Without dead ends: 877 [2022-01-31 17:52:38,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7380 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=22509, Invalid=37271, Unknown=0, NotChecked=0, Total=59780 [2022-01-31 17:52:38,978 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 946 mSolverCounterSat, 4121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 5067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4121 IncrementalHoareTripleChecker+Valid, 946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:52:38,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 56 Invalid, 5067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4121 Valid, 946 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 17:52:38,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2022-01-31 17:52:39,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 877. [2022-01-31 17:52:39,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 871 states have (on average 1.0091848450057406) internal successors, (879), 871 states have internal predecessors, (879), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:52:39,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 884 transitions. [2022-01-31 17:52:39,009 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 884 transitions. Word has length 865 [2022-01-31 17:52:39,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:52:39,009 INFO L470 AbstractCegarLoop]: Abstraction has 877 states and 884 transitions. [2022-01-31 17:52:39,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 1.185483870967742) internal successors, (147), 123 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:39,009 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 884 transitions. [2022-01-31 17:52:39,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 873 [2022-01-31 17:52:39,012 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:52:39,013 INFO L514 BasicCegarLoop]: trace histogram [121, 121, 121, 121, 121, 121, 121, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:52:39,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2022-01-31 17:52:39,013 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:52:39,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:52:39,013 INFO L85 PathProgramCache]: Analyzing trace with hash -329383324, now seen corresponding path program 121 times [2022-01-31 17:52:39,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:52:39,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203851310] [2022-01-31 17:52:39,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:52:39,014 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:52:39,014 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:52:39,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:52:39,076 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:52:39,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:43,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:52:43,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:43,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:52:43,817 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:52:43,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203851310] [2022-01-31 17:52:43,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [203851310] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:52:43,817 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:52:43,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [125] imperfect sequences [] total 125 [2022-01-31 17:52:43,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865974834] [2022-01-31 17:52:43,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:52:43,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2022-01-31 17:52:43,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:52:43,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2022-01-31 17:52:43,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7628, Invalid=7872, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 17:52:43,821 INFO L87 Difference]: Start difference. First operand 877 states and 884 transitions. Second operand has 125 states, 125 states have (on average 1.184) internal successors, (148), 124 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:52,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:52:52,560 INFO L93 Difference]: Finished difference Result 1633 states and 1653 transitions. [2022-01-31 17:52:52,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-01-31 17:52:52,560 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 1.184) internal successors, (148), 124 states have internal predecessors, (148), 2 states have call successors, (3), 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 872 [2022-01-31 17:52:52,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:52:52,561 INFO L225 Difference]: With dead ends: 1633 [2022-01-31 17:52:52,561 INFO L226 Difference]: Without dead ends: 884 [2022-01-31 17:52:52,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7502 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=22878, Invalid=37884, Unknown=0, NotChecked=0, Total=60762 [2022-01-31 17:52:52,564 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1061 mSolverCounterSat, 3539 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 4600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3539 IncrementalHoareTripleChecker+Valid, 1061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:52:52,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 86 Invalid, 4600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3539 Valid, 1061 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:52:52,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2022-01-31 17:52:52,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 884. [2022-01-31 17:52:52,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 878 states have (on average 1.0091116173120729) internal successors, (886), 878 states have internal predecessors, (886), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:52:52,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 891 transitions. [2022-01-31 17:52:52,578 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 891 transitions. Word has length 872 [2022-01-31 17:52:52,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:52:52,578 INFO L470 AbstractCegarLoop]: Abstraction has 884 states and 891 transitions. [2022-01-31 17:52:52,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 1.184) internal successors, (148), 124 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:52,578 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 891 transitions. [2022-01-31 17:52:52,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 880 [2022-01-31 17:52:52,581 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:52:52,581 INFO L514 BasicCegarLoop]: trace histogram [122, 122, 122, 122, 122, 122, 122, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:52:52,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2022-01-31 17:52:52,581 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:52:52,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:52:52,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1381649513, now seen corresponding path program 122 times [2022-01-31 17:52:52,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:52:52,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1492070060] [2022-01-31 17:52:52,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:52:52,583 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:52:52,583 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:52:52,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:52:52,644 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:52:52,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:57,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:52:57,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:57,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:52:57,043 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:52:57,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1492070060] [2022-01-31 17:52:57,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1492070060] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:52:57,043 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:52:57,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2022-01-31 17:52:57,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634447508] [2022-01-31 17:52:57,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:52:57,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-01-31 17:52:57,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:52:57,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-01-31 17:52:57,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2022-01-31 17:52:57,047 INFO L87 Difference]: Start difference. First operand 884 states and 891 transitions. Second operand has 126 states, 126 states have (on average 1.1825396825396826) internal successors, (149), 125 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:05,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:53:05,203 INFO L93 Difference]: Finished difference Result 1646 states and 1666 transitions. [2022-01-31 17:53:05,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-01-31 17:53:05,204 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 1.1825396825396826) internal successors, (149), 125 states have internal predecessors, (149), 2 states have call successors, (3), 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 879 [2022-01-31 17:53:05,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:53:05,205 INFO L225 Difference]: With dead ends: 1646 [2022-01-31 17:53:05,205 INFO L226 Difference]: Without dead ends: 891 [2022-01-31 17:53:05,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7625 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=23250, Invalid=38502, Unknown=0, NotChecked=0, Total=61752 [2022-01-31 17:53:05,207 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1014 mSolverCounterSat, 3745 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 4759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3745 IncrementalHoareTripleChecker+Valid, 1014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:53:05,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 71 Invalid, 4759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3745 Valid, 1014 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 17:53:05,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2022-01-31 17:53:05,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 891. [2022-01-31 17:53:05,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 885 states have (on average 1.0090395480225989) internal successors, (893), 885 states have internal predecessors, (893), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:53:05,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 898 transitions. [2022-01-31 17:53:05,221 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 898 transitions. Word has length 879 [2022-01-31 17:53:05,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:53:05,221 INFO L470 AbstractCegarLoop]: Abstraction has 891 states and 898 transitions. [2022-01-31 17:53:05,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 1.1825396825396826) internal successors, (149), 125 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:05,221 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 898 transitions. [2022-01-31 17:53:05,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 887 [2022-01-31 17:53:05,224 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:53:05,225 INFO L514 BasicCegarLoop]: trace histogram [123, 123, 123, 123, 123, 123, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:53:05,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2022-01-31 17:53:05,225 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:53:05,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:53:05,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1564254212, now seen corresponding path program 123 times [2022-01-31 17:53:05,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:53:05,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [704355841] [2022-01-31 17:53:05,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:53:05,226 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:53:05,226 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:53:05,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:53:05,286 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:53:05,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:09,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:53:09,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:09,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:53:09,938 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:53:09,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [704355841] [2022-01-31 17:53:09,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [704355841] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:53:09,938 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:53:09,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [127] imperfect sequences [] total 127 [2022-01-31 17:53:09,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175667778] [2022-01-31 17:53:09,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:53:09,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2022-01-31 17:53:09,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:53:09,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2022-01-31 17:53:09,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7877, Invalid=8125, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 17:53:09,941 INFO L87 Difference]: Start difference. First operand 891 states and 898 transitions. Second operand has 127 states, 127 states have (on average 1.1811023622047243) internal successors, (150), 126 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:19,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:53:19,296 INFO L93 Difference]: Finished difference Result 1659 states and 1679 transitions. [2022-01-31 17:53:19,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-01-31 17:53:19,296 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 1.1811023622047243) internal successors, (150), 126 states have internal predecessors, (150), 2 states have call successors, (3), 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 886 [2022-01-31 17:53:19,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:53:19,298 INFO L225 Difference]: With dead ends: 1659 [2022-01-31 17:53:19,298 INFO L226 Difference]: Without dead ends: 898 [2022-01-31 17:53:19,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7749 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=23625, Invalid=39125, Unknown=0, NotChecked=0, Total=62750 [2022-01-31 17:53:19,300 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 4064 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 5013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4064 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:53:19,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 51 Invalid, 5013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4064 Valid, 949 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 17:53:19,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2022-01-31 17:53:19,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 898. [2022-01-31 17:53:19,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 892 states have (on average 1.0089686098654709) internal successors, (900), 892 states have internal predecessors, (900), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:53:19,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 905 transitions. [2022-01-31 17:53:19,314 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 905 transitions. Word has length 886 [2022-01-31 17:53:19,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:53:19,315 INFO L470 AbstractCegarLoop]: Abstraction has 898 states and 905 transitions. [2022-01-31 17:53:19,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 1.1811023622047243) internal successors, (150), 126 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:19,315 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 905 transitions. [2022-01-31 17:53:19,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 894 [2022-01-31 17:53:19,318 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:53:19,318 INFO L514 BasicCegarLoop]: trace histogram [124, 124, 124, 124, 124, 124, 124, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:53:19,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2022-01-31 17:53:19,318 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:53:19,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:53:19,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1973681911, now seen corresponding path program 124 times [2022-01-31 17:53:19,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:53:19,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [844685328] [2022-01-31 17:53:19,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:53:19,319 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:53:19,319 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:53:19,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:53:19,381 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:53:19,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:23,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:53:23,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:23,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:53:23,973 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:53:23,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [844685328] [2022-01-31 17:53:23,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [844685328] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:53:23,973 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:53:23,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2022-01-31 17:53:23,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871260754] [2022-01-31 17:53:23,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:53:23,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-01-31 17:53:23,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:53:23,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-01-31 17:53:23,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2022-01-31 17:53:23,977 INFO L87 Difference]: Start difference. First operand 898 states and 905 transitions. Second operand has 128 states, 128 states have (on average 1.1796875) internal successors, (151), 127 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:32,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:53:32,408 INFO L93 Difference]: Finished difference Result 1672 states and 1692 transitions. [2022-01-31 17:53:32,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-01-31 17:53:32,408 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 1.1796875) internal successors, (151), 127 states have internal predecessors, (151), 2 states have call successors, (3), 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 893 [2022-01-31 17:53:32,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:53:32,409 INFO L225 Difference]: With dead ends: 1672 [2022-01-31 17:53:32,409 INFO L226 Difference]: Without dead ends: 905 [2022-01-31 17:53:32,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7874 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=24003, Invalid=39753, Unknown=0, NotChecked=0, Total=63756 [2022-01-31 17:53:32,412 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1010 mSolverCounterSat, 4224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 5234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4224 IncrementalHoareTripleChecker+Valid, 1010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:53:32,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 66 Invalid, 5234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4224 Valid, 1010 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 17:53:32,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2022-01-31 17:53:32,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 905. [2022-01-31 17:53:32,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 899 states have (on average 1.0088987764182424) internal successors, (907), 899 states have internal predecessors, (907), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:53:32,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 912 transitions. [2022-01-31 17:53:32,440 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 912 transitions. Word has length 893 [2022-01-31 17:53:32,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:53:32,440 INFO L470 AbstractCegarLoop]: Abstraction has 905 states and 912 transitions. [2022-01-31 17:53:32,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 1.1796875) internal successors, (151), 127 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:32,441 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 912 transitions. [2022-01-31 17:53:32,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 901 [2022-01-31 17:53:32,464 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:53:32,464 INFO L514 BasicCegarLoop]: trace histogram [125, 125, 125, 125, 125, 125, 125, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:53:32,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2022-01-31 17:53:32,464 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:53:32,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:53:32,465 INFO L85 PathProgramCache]: Analyzing trace with hash 562226596, now seen corresponding path program 125 times [2022-01-31 17:53:32,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:53:32,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1041776994] [2022-01-31 17:53:32,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:53:32,466 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:53:32,466 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:53:32,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:53:32,571 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:53:32,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:36,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:53:36,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:36,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:53:36,461 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:53:36,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1041776994] [2022-01-31 17:53:36,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1041776994] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:53:36,461 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:53:36,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [129] imperfect sequences [] total 129 [2022-01-31 17:53:36,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597684064] [2022-01-31 17:53:36,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:53:36,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-01-31 17:53:36,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:53:36,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-01-31 17:53:36,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8130, Invalid=8382, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 17:53:36,465 INFO L87 Difference]: Start difference. First operand 905 states and 912 transitions. Second operand has 129 states, 129 states have (on average 1.178294573643411) internal successors, (152), 128 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:46,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:53:46,401 INFO L93 Difference]: Finished difference Result 1685 states and 1705 transitions. [2022-01-31 17:53:46,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-01-31 17:53:46,402 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 1.178294573643411) internal successors, (152), 128 states have internal predecessors, (152), 2 states have call successors, (3), 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 900 [2022-01-31 17:53:46,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:53:46,403 INFO L225 Difference]: With dead ends: 1685 [2022-01-31 17:53:46,403 INFO L226 Difference]: Without dead ends: 912 [2022-01-31 17:53:46,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8000 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=24384, Invalid=40386, Unknown=0, NotChecked=0, Total=64770 [2022-01-31 17:53:46,405 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 3860 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 4877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3860 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:53:46,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 66 Invalid, 4877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3860 Valid, 1017 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 17:53:46,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2022-01-31 17:53:46,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 912. [2022-01-31 17:53:46,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 906 states have (on average 1.0088300220750552) internal successors, (914), 906 states have internal predecessors, (914), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:53:46,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 919 transitions. [2022-01-31 17:53:46,420 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 919 transitions. Word has length 900 [2022-01-31 17:53:46,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:53:46,420 INFO L470 AbstractCegarLoop]: Abstraction has 912 states and 919 transitions. [2022-01-31 17:53:46,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 1.178294573643411) internal successors, (152), 128 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:46,420 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 919 transitions. [2022-01-31 17:53:46,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 908 [2022-01-31 17:53:46,423 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:53:46,423 INFO L514 BasicCegarLoop]: trace histogram [126, 126, 126, 126, 126, 126, 126, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:53:46,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2022-01-31 17:53:46,423 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:53:46,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:53:46,424 INFO L85 PathProgramCache]: Analyzing trace with hash -2002967977, now seen corresponding path program 126 times [2022-01-31 17:53:46,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:53:46,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [488425223] [2022-01-31 17:53:46,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:53:46,425 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:53:46,425 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:53:46,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:53:46,487 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:53:46,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:50,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:53:50,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:50,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:53:50,711 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:53:50,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [488425223] [2022-01-31 17:53:50,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [488425223] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:53:50,711 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:53:50,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [130] imperfect sequences [] total 130 [2022-01-31 17:53:50,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579798460] [2022-01-31 17:53:50,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:53:50,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-01-31 17:53:50,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:53:50,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-01-31 17:53:50,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8258, Invalid=8512, Unknown=0, NotChecked=0, Total=16770 [2022-01-31 17:53:50,715 INFO L87 Difference]: Start difference. First operand 912 states and 919 transitions. Second operand has 130 states, 130 states have (on average 1.176923076923077) internal successors, (153), 129 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:59,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:53:59,487 INFO L93 Difference]: Finished difference Result 1698 states and 1718 transitions. [2022-01-31 17:53:59,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-01-31 17:53:59,487 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 1.176923076923077) internal successors, (153), 129 states have internal predecessors, (153), 2 states have call successors, (3), 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 907 [2022-01-31 17:53:59,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:53:59,488 INFO L225 Difference]: With dead ends: 1698 [2022-01-31 17:53:59,488 INFO L226 Difference]: Without dead ends: 919 [2022-01-31 17:53:59,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8127 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=24768, Invalid=41024, Unknown=0, NotChecked=0, Total=65792 [2022-01-31 17:53:59,491 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1042 mSolverCounterSat, 3954 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 4996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3954 IncrementalHoareTripleChecker+Valid, 1042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:53:59,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 71 Invalid, 4996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3954 Valid, 1042 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 17:53:59,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2022-01-31 17:53:59,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 919. [2022-01-31 17:53:59,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 913 states have (on average 1.0087623220153341) internal successors, (921), 913 states have internal predecessors, (921), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:53:59,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 926 transitions. [2022-01-31 17:53:59,505 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 926 transitions. Word has length 907 [2022-01-31 17:53:59,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:53:59,505 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 926 transitions. [2022-01-31 17:53:59,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 1.176923076923077) internal successors, (153), 129 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:59,505 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 926 transitions. [2022-01-31 17:53:59,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 915 [2022-01-31 17:53:59,509 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:53:59,509 INFO L514 BasicCegarLoop]: trace histogram [127, 127, 127, 127, 127, 127, 127, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:53:59,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2022-01-31 17:53:59,509 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:53:59,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:53:59,509 INFO L85 PathProgramCache]: Analyzing trace with hash -2000497852, now seen corresponding path program 127 times [2022-01-31 17:53:59,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:53:59,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734776979] [2022-01-31 17:53:59,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:53:59,510 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:53:59,510 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:53:59,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:53:59,576 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:53:59,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:04,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:54:04,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:04,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:54:04,345 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:54:04,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734776979] [2022-01-31 17:54:04,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1734776979] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:54:04,345 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:54:04,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [131] imperfect sequences [] total 131 [2022-01-31 17:54:04,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905398743] [2022-01-31 17:54:04,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:54:04,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-01-31 17:54:04,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:54:04,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-01-31 17:54:04,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8387, Invalid=8643, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 17:54:04,351 INFO L87 Difference]: Start difference. First operand 919 states and 926 transitions. Second operand has 131 states, 131 states have (on average 1.1755725190839694) internal successors, (154), 130 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:13,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:54:13,298 INFO L93 Difference]: Finished difference Result 1711 states and 1731 transitions. [2022-01-31 17:54:13,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-01-31 17:54:13,298 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 1.1755725190839694) internal successors, (154), 130 states have internal predecessors, (154), 2 states have call successors, (3), 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 914 [2022-01-31 17:54:13,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:54:13,300 INFO L225 Difference]: With dead ends: 1711 [2022-01-31 17:54:13,300 INFO L226 Difference]: Without dead ends: 926 [2022-01-31 17:54:13,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8255 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=25155, Invalid=41667, Unknown=0, NotChecked=0, Total=66822 [2022-01-31 17:54:13,303 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 977 mSolverCounterSat, 4261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 5238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4261 IncrementalHoareTripleChecker+Valid, 977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:54:13,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 51 Invalid, 5238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4261 Valid, 977 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 17:54:13,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2022-01-31 17:54:13,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 926. [2022-01-31 17:54:13,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 920 states have (on average 1.008695652173913) internal successors, (928), 920 states have internal predecessors, (928), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:54:13,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 933 transitions. [2022-01-31 17:54:13,317 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 933 transitions. Word has length 914 [2022-01-31 17:54:13,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:54:13,317 INFO L470 AbstractCegarLoop]: Abstraction has 926 states and 933 transitions. [2022-01-31 17:54:13,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 1.1755725190839694) internal successors, (154), 130 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:13,317 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 933 transitions. [2022-01-31 17:54:13,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 922 [2022-01-31 17:54:13,321 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:54:13,321 INFO L514 BasicCegarLoop]: trace histogram [128, 128, 128, 128, 128, 128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:54:13,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2022-01-31 17:54:13,321 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:54:13,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:54:13,321 INFO L85 PathProgramCache]: Analyzing trace with hash -817947209, now seen corresponding path program 128 times [2022-01-31 17:54:13,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:54:13,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1521258010] [2022-01-31 17:54:13,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:54:13,322 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:54:13,322 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:54:13,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:54:13,386 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:54:13,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:18,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:54:18,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:18,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:54:18,514 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:54:18,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1521258010] [2022-01-31 17:54:18,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1521258010] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:54:18,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:54:18,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [132] imperfect sequences [] total 132 [2022-01-31 17:54:18,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226585495] [2022-01-31 17:54:18,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:54:18,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-01-31 17:54:18,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:54:18,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-01-31 17:54:18,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8517, Invalid=8775, Unknown=0, NotChecked=0, Total=17292 [2022-01-31 17:54:18,517 INFO L87 Difference]: Start difference. First operand 926 states and 933 transitions. Second operand has 132 states, 132 states have (on average 1.1742424242424243) internal successors, (155), 131 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:27,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:54:27,708 INFO L93 Difference]: Finished difference Result 1724 states and 1744 transitions. [2022-01-31 17:54:27,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-01-31 17:54:27,709 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 1.1742424242424243) internal successors, (155), 131 states have internal predecessors, (155), 2 states have call successors, (3), 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 921 [2022-01-31 17:54:27,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:54:27,709 INFO L225 Difference]: With dead ends: 1724 [2022-01-31 17:54:27,709 INFO L226 Difference]: Without dead ends: 933 [2022-01-31 17:54:27,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8384 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=25545, Invalid=42315, Unknown=0, NotChecked=0, Total=67860 [2022-01-31 17:54:27,712 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 966 mSolverCounterSat, 4563 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 5529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4563 IncrementalHoareTripleChecker+Valid, 966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:54:27,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 46 Invalid, 5529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4563 Valid, 966 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 17:54:27,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2022-01-31 17:54:27,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 933. [2022-01-31 17:54:27,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 933 states, 927 states have (on average 1.0086299892125135) internal successors, (935), 927 states have internal predecessors, (935), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:54:27,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 933 states to 933 states and 940 transitions. [2022-01-31 17:54:27,726 INFO L78 Accepts]: Start accepts. Automaton has 933 states and 940 transitions. Word has length 921 [2022-01-31 17:54:27,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:54:27,727 INFO L470 AbstractCegarLoop]: Abstraction has 933 states and 940 transitions. [2022-01-31 17:54:27,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 1.1742424242424243) internal successors, (155), 131 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:27,727 INFO L276 IsEmpty]: Start isEmpty. Operand 933 states and 940 transitions. [2022-01-31 17:54:27,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 929 [2022-01-31 17:54:27,730 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:54:27,730 INFO L514 BasicCegarLoop]: trace histogram [129, 129, 129, 129, 129, 129, 129, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:54:27,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2022-01-31 17:54:27,730 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:54:27,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:54:27,731 INFO L85 PathProgramCache]: Analyzing trace with hash 823027940, now seen corresponding path program 129 times [2022-01-31 17:54:27,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:54:27,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [358619303] [2022-01-31 17:54:27,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:54:27,732 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:54:27,732 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:54:27,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:54:27,797 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:54:28,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:32,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:54:32,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:32,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:54:32,898 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:54:32,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [358619303] [2022-01-31 17:54:32,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [358619303] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:54:32,898 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:54:32,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [133] imperfect sequences [] total 133 [2022-01-31 17:54:32,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192181571] [2022-01-31 17:54:32,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:54:32,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2022-01-31 17:54:32,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:54:32,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2022-01-31 17:54:32,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8648, Invalid=8908, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 17:54:32,903 INFO L87 Difference]: Start difference. First operand 933 states and 940 transitions. Second operand has 133 states, 133 states have (on average 1.1729323308270676) internal successors, (156), 132 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:42,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:54:42,632 INFO L93 Difference]: Finished difference Result 1737 states and 1757 transitions. [2022-01-31 17:54:42,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-01-31 17:54:42,632 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 1.1729323308270676) internal successors, (156), 132 states have internal predecessors, (156), 2 states have call successors, (3), 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 928 [2022-01-31 17:54:42,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:54:42,633 INFO L225 Difference]: With dead ends: 1737 [2022-01-31 17:54:42,633 INFO L226 Difference]: Without dead ends: 940 [2022-01-31 17:54:42,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8514 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=25938, Invalid=42968, Unknown=0, NotChecked=0, Total=68906 [2022-01-31 17:54:42,636 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 4457 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 5466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4457 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:54:42,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 56 Invalid, 5466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4457 Valid, 1009 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 17:54:42,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2022-01-31 17:54:42,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 940. [2022-01-31 17:54:42,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 934 states have (on average 1.0085653104925054) internal successors, (942), 934 states have internal predecessors, (942), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:54:42,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 947 transitions. [2022-01-31 17:54:42,651 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 947 transitions. Word has length 928 [2022-01-31 17:54:42,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:54:42,651 INFO L470 AbstractCegarLoop]: Abstraction has 940 states and 947 transitions. [2022-01-31 17:54:42,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 1.1729323308270676) internal successors, (156), 132 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:42,651 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 947 transitions. [2022-01-31 17:54:42,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 936 [2022-01-31 17:54:42,654 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:54:42,655 INFO L514 BasicCegarLoop]: trace histogram [130, 130, 130, 130, 130, 130, 130, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:54:42,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2022-01-31 17:54:42,655 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:54:42,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:54:42,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1941434647, now seen corresponding path program 130 times [2022-01-31 17:54:42,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:54:42,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [738814960] [2022-01-31 17:54:42,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:54:42,656 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:54:42,656 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:54:42,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:54:42,722 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:54:43,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:48,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:54:48,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:48,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:54:48,048 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:54:48,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [738814960] [2022-01-31 17:54:48,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [738814960] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:54:48,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:54:48,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [134] imperfect sequences [] total 134 [2022-01-31 17:54:48,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217029379] [2022-01-31 17:54:48,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:54:48,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-01-31 17:54:48,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:54:48,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-01-31 17:54:48,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2022-01-31 17:54:48,053 INFO L87 Difference]: Start difference. First operand 940 states and 947 transitions. Second operand has 134 states, 134 states have (on average 1.171641791044776) internal successors, (157), 133 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:57,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:54:57,551 INFO L93 Difference]: Finished difference Result 1750 states and 1770 transitions. [2022-01-31 17:54:57,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-01-31 17:54:57,551 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 1.171641791044776) internal successors, (157), 133 states have internal predecessors, (157), 2 states have call successors, (3), 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 935 [2022-01-31 17:54:57,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:54:57,552 INFO L225 Difference]: With dead ends: 1750 [2022-01-31 17:54:57,552 INFO L226 Difference]: Without dead ends: 947 [2022-01-31 17:54:57,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8645 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=26334, Invalid=43626, Unknown=0, NotChecked=0, Total=69960 [2022-01-31 17:54:57,555 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1052 mSolverCounterSat, 4042 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 5094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4042 IncrementalHoareTripleChecker+Valid, 1052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:54:57,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 66 Invalid, 5094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4042 Valid, 1052 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 17:54:57,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2022-01-31 17:54:57,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 947. [2022-01-31 17:54:57,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 941 states have (on average 1.0085015940488842) internal successors, (949), 941 states have internal predecessors, (949), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:54:57,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 954 transitions. [2022-01-31 17:54:57,569 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 954 transitions. Word has length 935 [2022-01-31 17:54:57,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:54:57,570 INFO L470 AbstractCegarLoop]: Abstraction has 947 states and 954 transitions. [2022-01-31 17:54:57,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 1.171641791044776) internal successors, (157), 133 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:57,570 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 954 transitions. [2022-01-31 17:54:57,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 943 [2022-01-31 17:54:57,574 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:54:57,574 INFO L514 BasicCegarLoop]: trace histogram [131, 131, 131, 131, 131, 131, 131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:54:57,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2022-01-31 17:54:57,574 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:54:57,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:54:57,574 INFO L85 PathProgramCache]: Analyzing trace with hash 653764228, now seen corresponding path program 131 times [2022-01-31 17:54:57,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:54:57,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1567002781] [2022-01-31 17:54:57,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:54:57,575 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:54:57,575 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:54:57,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:54:57,653 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:54:57,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:03,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:55:03,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:03,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:55:03,283 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:55:03,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1567002781] [2022-01-31 17:55:03,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1567002781] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:55:03,284 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:55:03,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [135] imperfect sequences [] total 135 [2022-01-31 17:55:03,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112486160] [2022-01-31 17:55:03,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:55:03,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-01-31 17:55:03,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:55:03,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-01-31 17:55:03,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8913, Invalid=9177, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 17:55:03,286 INFO L87 Difference]: Start difference. First operand 947 states and 954 transitions. Second operand has 135 states, 135 states have (on average 1.1703703703703703) internal successors, (158), 134 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:12,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:55:12,604 INFO L93 Difference]: Finished difference Result 1763 states and 1783 transitions. [2022-01-31 17:55:12,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-01-31 17:55:12,605 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 1.1703703703703703) internal successors, (158), 134 states have internal predecessors, (158), 2 states have call successors, (3), 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 942 [2022-01-31 17:55:12,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:55:12,605 INFO L225 Difference]: With dead ends: 1763 [2022-01-31 17:55:12,605 INFO L226 Difference]: Without dead ends: 954 [2022-01-31 17:55:12,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8777 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=26733, Invalid=44289, Unknown=0, NotChecked=0, Total=71022 [2022-01-31 17:55:12,608 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1077 mSolverCounterSat, 4006 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 5083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4006 IncrementalHoareTripleChecker+Valid, 1077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:55:12,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 71 Invalid, 5083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4006 Valid, 1077 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 17:55:12,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2022-01-31 17:55:12,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 954. [2022-01-31 17:55:12,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 948 states have (on average 1.0084388185654007) internal successors, (956), 948 states have internal predecessors, (956), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:55:12,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 961 transitions. [2022-01-31 17:55:12,623 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 961 transitions. Word has length 942 [2022-01-31 17:55:12,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:55:12,623 INFO L470 AbstractCegarLoop]: Abstraction has 954 states and 961 transitions. [2022-01-31 17:55:12,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 1.1703703703703703) internal successors, (158), 134 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:12,623 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 961 transitions. [2022-01-31 17:55:12,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 950 [2022-01-31 17:55:12,627 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:55:12,627 INFO L514 BasicCegarLoop]: trace histogram [132, 132, 132, 132, 132, 132, 132, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:55:12,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2022-01-31 17:55:12,627 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:55:12,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:55:12,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1045062537, now seen corresponding path program 132 times [2022-01-31 17:55:12,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:55:12,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691970850] [2022-01-31 17:55:12,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:55:12,628 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:55:12,628 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:55:12,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:55:12,694 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:55:13,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:18,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:55:18,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:18,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:55:18,498 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:55:18,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691970850] [2022-01-31 17:55:18,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [691970850] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:55:18,498 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:55:18,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [136] imperfect sequences [] total 136 [2022-01-31 17:55:18,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361689609] [2022-01-31 17:55:18,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:55:18,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2022-01-31 17:55:18,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:55:18,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2022-01-31 17:55:18,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9047, Invalid=9313, Unknown=0, NotChecked=0, Total=18360 [2022-01-31 17:55:18,502 INFO L87 Difference]: Start difference. First operand 954 states and 961 transitions. Second operand has 136 states, 136 states have (on average 1.1691176470588236) internal successors, (159), 135 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:28,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:55:28,185 INFO L93 Difference]: Finished difference Result 1776 states and 1796 transitions. [2022-01-31 17:55:28,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-01-31 17:55:28,185 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 1.1691176470588236) internal successors, (159), 135 states have internal predecessors, (159), 2 states have call successors, (3), 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 949 [2022-01-31 17:55:28,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:55:28,186 INFO L225 Difference]: With dead ends: 1776 [2022-01-31 17:55:28,186 INFO L226 Difference]: Without dead ends: 961 [2022-01-31 17:55:28,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8910 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=27135, Invalid=44957, Unknown=0, NotChecked=0, Total=72092 [2022-01-31 17:55:28,189 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1048 mSolverCounterSat, 4066 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 5114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4066 IncrementalHoareTripleChecker+Valid, 1048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:55:28,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 61 Invalid, 5114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4066 Valid, 1048 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 17:55:28,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2022-01-31 17:55:28,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 961. [2022-01-31 17:55:28,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 961 states, 955 states have (on average 1.0083769633507853) internal successors, (963), 955 states have internal predecessors, (963), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:55:28,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 968 transitions. [2022-01-31 17:55:28,204 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 968 transitions. Word has length 949 [2022-01-31 17:55:28,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:55:28,204 INFO L470 AbstractCegarLoop]: Abstraction has 961 states and 968 transitions. [2022-01-31 17:55:28,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 1.1691176470588236) internal successors, (159), 135 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:28,204 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 968 transitions. [2022-01-31 17:55:28,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 957 [2022-01-31 17:55:28,208 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:55:28,208 INFO L514 BasicCegarLoop]: trace histogram [133, 133, 133, 133, 133, 133, 133, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:55:28,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2022-01-31 17:55:28,208 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:55:28,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:55:28,208 INFO L85 PathProgramCache]: Analyzing trace with hash 93359140, now seen corresponding path program 133 times [2022-01-31 17:55:28,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:55:28,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [694249588] [2022-01-31 17:55:28,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:55:28,209 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:55:28,209 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:55:28,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:55:28,275 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:55:28,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:33,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:55:33,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:33,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:55:33,748 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:55:33,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [694249588] [2022-01-31 17:55:33,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [694249588] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:55:33,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:55:33,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [137] imperfect sequences [] total 137 [2022-01-31 17:55:33,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81050397] [2022-01-31 17:55:33,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:55:33,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2022-01-31 17:55:33,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:55:33,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2022-01-31 17:55:33,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9182, Invalid=9450, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 17:55:33,753 INFO L87 Difference]: Start difference. First operand 961 states and 968 transitions. Second operand has 137 states, 137 states have (on average 1.167883211678832) internal successors, (160), 136 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:44,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:55:44,107 INFO L93 Difference]: Finished difference Result 1789 states and 1809 transitions. [2022-01-31 17:55:44,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-01-31 17:55:44,108 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 1.167883211678832) internal successors, (160), 136 states have internal predecessors, (160), 2 states have call successors, (3), 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 956 [2022-01-31 17:55:44,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:55:44,109 INFO L225 Difference]: With dead ends: 1789 [2022-01-31 17:55:44,109 INFO L226 Difference]: Without dead ends: 968 [2022-01-31 17:55:44,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9044 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=27540, Invalid=45630, Unknown=0, NotChecked=0, Total=73170 [2022-01-31 17:55:44,111 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1055 mSolverCounterSat, 4675 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 5730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4675 IncrementalHoareTripleChecker+Valid, 1055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:55:44,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 61 Invalid, 5730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4675 Valid, 1055 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 17:55:44,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2022-01-31 17:55:44,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 968. [2022-01-31 17:55:44,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 968 states, 962 states have (on average 1.0083160083160083) internal successors, (970), 962 states have internal predecessors, (970), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:55:44,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 975 transitions. [2022-01-31 17:55:44,126 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 975 transitions. Word has length 956 [2022-01-31 17:55:44,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:55:44,126 INFO L470 AbstractCegarLoop]: Abstraction has 968 states and 975 transitions. [2022-01-31 17:55:44,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 1.167883211678832) internal successors, (160), 136 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:44,127 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 975 transitions. [2022-01-31 17:55:44,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 964 [2022-01-31 17:55:44,130 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:55:44,130 INFO L514 BasicCegarLoop]: trace histogram [134, 134, 134, 134, 134, 134, 134, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:55:44,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2022-01-31 17:55:44,131 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:55:44,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:55:44,131 INFO L85 PathProgramCache]: Analyzing trace with hash 107356119, now seen corresponding path program 134 times [2022-01-31 17:55:44,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:55:44,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1194723710] [2022-01-31 17:55:44,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:55:44,132 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:55:44,132 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:55:44,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:55:44,200 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:55:44,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:48,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:55:48,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:48,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:55:48,548 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:55:48,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1194723710] [2022-01-31 17:55:48,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1194723710] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:55:48,549 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:55:48,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [138] imperfect sequences [] total 138 [2022-01-31 17:55:48,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971251028] [2022-01-31 17:55:48,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:55:48,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2022-01-31 17:55:48,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:55:48,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2022-01-31 17:55:48,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9318, Invalid=9588, Unknown=0, NotChecked=0, Total=18906 [2022-01-31 17:55:48,551 INFO L87 Difference]: Start difference. First operand 968 states and 975 transitions. Second operand has 138 states, 138 states have (on average 1.1666666666666667) internal successors, (161), 137 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:59,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:55:59,575 INFO L93 Difference]: Finished difference Result 1802 states and 1822 transitions. [2022-01-31 17:55:59,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-01-31 17:55:59,575 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 1.1666666666666667) internal successors, (161), 137 states have internal predecessors, (161), 2 states have call successors, (3), 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 963 [2022-01-31 17:55:59,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:55:59,576 INFO L225 Difference]: With dead ends: 1802 [2022-01-31 17:55:59,576 INFO L226 Difference]: Without dead ends: 975 [2022-01-31 17:55:59,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 271 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9179 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=27948, Invalid=46308, Unknown=0, NotChecked=0, Total=74256 [2022-01-31 17:55:59,579 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 4455 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 5481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4455 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:55:59,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 51 Invalid, 5481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4455 Valid, 1026 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 17:55:59,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2022-01-31 17:55:59,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 975. [2022-01-31 17:55:59,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 975 states, 969 states have (on average 1.0082559339525283) internal successors, (977), 969 states have internal predecessors, (977), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:55:59,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 982 transitions. [2022-01-31 17:55:59,594 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 982 transitions. Word has length 963 [2022-01-31 17:55:59,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:55:59,595 INFO L470 AbstractCegarLoop]: Abstraction has 975 states and 982 transitions. [2022-01-31 17:55:59,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 1.1666666666666667) internal successors, (161), 137 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:59,595 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 982 transitions. [2022-01-31 17:55:59,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 971 [2022-01-31 17:55:59,630 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:55:59,630 INFO L514 BasicCegarLoop]: trace histogram [135, 135, 135, 135, 135, 135, 135, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:55:59,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2022-01-31 17:55:59,630 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:55:59,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:55:59,631 INFO L85 PathProgramCache]: Analyzing trace with hash 376117700, now seen corresponding path program 135 times [2022-01-31 17:55:59,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:55:59,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226415337] [2022-01-31 17:55:59,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:55:59,632 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:55:59,632 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:55:59,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:55:59,700 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:00,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:03,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:03,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:03,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:03,966 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:03,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226415337] [2022-01-31 17:56:03,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1226415337] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:03,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:03,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [139] imperfect sequences [] total 139 [2022-01-31 17:56:03,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012481633] [2022-01-31 17:56:03,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:03,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2022-01-31 17:56:03,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:03,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2022-01-31 17:56:03,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9455, Invalid=9727, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 17:56:03,970 INFO L87 Difference]: Start difference. First operand 975 states and 982 transitions. Second operand has 139 states, 139 states have (on average 1.1654676258992807) internal successors, (162), 138 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:15,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:15,183 INFO L93 Difference]: Finished difference Result 1815 states and 1835 transitions. [2022-01-31 17:56:15,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-01-31 17:56:15,184 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 1.1654676258992807) internal successors, (162), 138 states have internal predecessors, (162), 2 states have call successors, (3), 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 970 [2022-01-31 17:56:15,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:15,185 INFO L225 Difference]: With dead ends: 1815 [2022-01-31 17:56:15,185 INFO L226 Difference]: Without dead ends: 982 [2022-01-31 17:56:15,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 273 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9315 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=28359, Invalid=46991, Unknown=0, NotChecked=0, Total=75350 [2022-01-31 17:56:15,188 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 5411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 6462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5411 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:15,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 56 Invalid, 6462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5411 Valid, 1051 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 17:56:15,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2022-01-31 17:56:15,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 982. [2022-01-31 17:56:15,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 976 states have (on average 1.0081967213114753) internal successors, (984), 976 states have internal predecessors, (984), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:56:15,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 989 transitions. [2022-01-31 17:56:15,203 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 989 transitions. Word has length 970 [2022-01-31 17:56:15,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:15,203 INFO L470 AbstractCegarLoop]: Abstraction has 982 states and 989 transitions. [2022-01-31 17:56:15,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 1.1654676258992807) internal successors, (162), 138 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:15,203 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 989 transitions. [2022-01-31 17:56:15,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 978 [2022-01-31 17:56:15,207 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:15,207 INFO L514 BasicCegarLoop]: trace histogram [136, 136, 136, 136, 136, 136, 136, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:15,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2022-01-31 17:56:15,207 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:15,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:15,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1886878519, now seen corresponding path program 136 times [2022-01-31 17:56:15,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:15,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1009803836] [2022-01-31 17:56:15,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:15,209 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:15,209 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:15,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:15,283 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:15,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:20,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:20,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:20,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:20,545 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:20,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1009803836] [2022-01-31 17:56:20,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1009803836] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:20,545 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:20,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [140] imperfect sequences [] total 140 [2022-01-31 17:56:20,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631624872] [2022-01-31 17:56:20,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:20,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-01-31 17:56:20,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:20,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-01-31 17:56:20,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2022-01-31 17:56:20,550 INFO L87 Difference]: Start difference. First operand 982 states and 989 transitions. Second operand has 140 states, 140 states have (on average 1.1642857142857144) internal successors, (163), 139 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:32,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:32,482 INFO L93 Difference]: Finished difference Result 1828 states and 1848 transitions. [2022-01-31 17:56:32,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-01-31 17:56:32,482 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 1.1642857142857144) internal successors, (163), 139 states have internal predecessors, (163), 2 states have call successors, (3), 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 977 [2022-01-31 17:56:32,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:32,483 INFO L225 Difference]: With dead ends: 1828 [2022-01-31 17:56:32,483 INFO L226 Difference]: Without dead ends: 989 [2022-01-31 17:56:32,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9452 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=28773, Invalid=47679, Unknown=0, NotChecked=0, Total=76452 [2022-01-31 17:56:32,486 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1112 mSolverCounterSat, 4658 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 5770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4658 IncrementalHoareTripleChecker+Valid, 1112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:32,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 71 Invalid, 5770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4658 Valid, 1112 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 17:56:32,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2022-01-31 17:56:32,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 989. [2022-01-31 17:56:32,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 989 states, 983 states have (on average 1.0081383519837233) internal successors, (991), 983 states have internal predecessors, (991), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:56:32,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 989 states to 989 states and 996 transitions. [2022-01-31 17:56:32,503 INFO L78 Accepts]: Start accepts. Automaton has 989 states and 996 transitions. Word has length 977 [2022-01-31 17:56:32,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:32,503 INFO L470 AbstractCegarLoop]: Abstraction has 989 states and 996 transitions. [2022-01-31 17:56:32,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 1.1642857142857144) internal successors, (163), 139 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:32,503 INFO L276 IsEmpty]: Start isEmpty. Operand 989 states and 996 transitions. [2022-01-31 17:56:32,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 985 [2022-01-31 17:56:32,508 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:32,508 INFO L514 BasicCegarLoop]: trace histogram [137, 137, 137, 137, 137, 137, 137, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:32,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2022-01-31 17:56:32,508 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:32,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:32,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1905872740, now seen corresponding path program 137 times [2022-01-31 17:56:32,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:32,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [738519375] [2022-01-31 17:56:32,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:32,509 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:32,509 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:32,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:32,583 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:32,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:38,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:38,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:38,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:38,070 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:38,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [738519375] [2022-01-31 17:56:38,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [738519375] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:38,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:38,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [141] imperfect sequences [] total 141 [2022-01-31 17:56:38,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210614799] [2022-01-31 17:56:38,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:38,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2022-01-31 17:56:38,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:38,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2022-01-31 17:56:38,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9732, Invalid=10008, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 17:56:38,075 INFO L87 Difference]: Start difference. First operand 989 states and 996 transitions. Second operand has 141 states, 141 states have (on average 1.1631205673758864) internal successors, (164), 140 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:49,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:49,430 INFO L93 Difference]: Finished difference Result 1841 states and 1861 transitions. [2022-01-31 17:56:49,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2022-01-31 17:56:49,431 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 1.1631205673758864) internal successors, (164), 140 states have internal predecessors, (164), 2 states have call successors, (3), 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 984 [2022-01-31 17:56:49,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:49,432 INFO L225 Difference]: With dead ends: 1841 [2022-01-31 17:56:49,432 INFO L226 Difference]: Without dead ends: 996 [2022-01-31 17:56:49,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9590 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=29190, Invalid=48372, Unknown=0, NotChecked=0, Total=77562 [2022-01-31 17:56:49,435 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1047 mSolverCounterSat, 4381 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 5428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4381 IncrementalHoareTripleChecker+Valid, 1047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:49,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 51 Invalid, 5428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4381 Valid, 1047 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 17:56:49,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2022-01-31 17:56:49,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 996. [2022-01-31 17:56:49,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 990 states have (on average 1.0080808080808081) internal successors, (998), 990 states have internal predecessors, (998), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:56:49,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 1003 transitions. [2022-01-31 17:56:49,450 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 1003 transitions. Word has length 984 [2022-01-31 17:56:49,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:49,450 INFO L470 AbstractCegarLoop]: Abstraction has 996 states and 1003 transitions. [2022-01-31 17:56:49,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 141 states have (on average 1.1631205673758864) internal successors, (164), 140 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:49,450 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 1003 transitions. [2022-01-31 17:56:49,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 992 [2022-01-31 17:56:49,454 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:49,454 INFO L514 BasicCegarLoop]: trace histogram [138, 138, 138, 138, 138, 138, 138, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:49,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2022-01-31 17:56:49,454 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:49,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:49,455 INFO L85 PathProgramCache]: Analyzing trace with hash -266883433, now seen corresponding path program 138 times [2022-01-31 17:56:49,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:49,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1497490024] [2022-01-31 17:56:49,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:49,456 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:49,456 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:49,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:49,527 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:49,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:54,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:54,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:54,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:54,578 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:54,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1497490024] [2022-01-31 17:56:54,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1497490024] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:54,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:54,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [142] imperfect sequences [] total 142 [2022-01-31 17:56:54,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47401007] [2022-01-31 17:56:54,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:54,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 142 states [2022-01-31 17:56:54,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:54,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2022-01-31 17:56:54,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9872, Invalid=10150, Unknown=0, NotChecked=0, Total=20022 [2022-01-31 17:56:54,582 INFO L87 Difference]: Start difference. First operand 996 states and 1003 transitions. Second operand has 142 states, 142 states have (on average 1.1619718309859155) internal successors, (165), 141 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:06,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:06,482 INFO L93 Difference]: Finished difference Result 1854 states and 1874 transitions. [2022-01-31 17:57:06,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-01-31 17:57:06,482 INFO L78 Accepts]: Start accepts. Automaton has has 142 states, 142 states have (on average 1.1619718309859155) internal successors, (165), 141 states have internal predecessors, (165), 2 states have call successors, (3), 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 991 [2022-01-31 17:57:06,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:06,483 INFO L225 Difference]: With dead ends: 1854 [2022-01-31 17:57:06,483 INFO L226 Difference]: Without dead ends: 1003 [2022-01-31 17:57:06,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 279 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9729 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=29610, Invalid=49070, Unknown=0, NotChecked=0, Total=78680 [2022-01-31 17:57:06,486 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1108 mSolverCounterSat, 4237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 5345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4237 IncrementalHoareTripleChecker+Valid, 1108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:06,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 66 Invalid, 5345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4237 Valid, 1108 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 17:57:06,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2022-01-31 17:57:06,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 1003. [2022-01-31 17:57:06,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 997 states have (on average 1.00802407221665) internal successors, (1005), 997 states have internal predecessors, (1005), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:57:06,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1010 transitions. [2022-01-31 17:57:06,502 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1010 transitions. Word has length 991 [2022-01-31 17:57:06,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:06,502 INFO L470 AbstractCegarLoop]: Abstraction has 1003 states and 1010 transitions. [2022-01-31 17:57:06,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 142 states, 142 states have (on average 1.1619718309859155) internal successors, (165), 141 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:06,502 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1010 transitions. [2022-01-31 17:57:06,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 999 [2022-01-31 17:57:06,506 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:06,506 INFO L514 BasicCegarLoop]: trace histogram [139, 139, 139, 139, 139, 139, 139, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:06,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2022-01-31 17:57:06,506 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:06,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:06,507 INFO L85 PathProgramCache]: Analyzing trace with hash 497888516, now seen corresponding path program 139 times [2022-01-31 17:57:06,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:06,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1186151262] [2022-01-31 17:57:06,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:06,508 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:06,508 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:06,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:06,589 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:06,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:12,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:12,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:12,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:12,036 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:12,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1186151262] [2022-01-31 17:57:12,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1186151262] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:12,036 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:12,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [143] imperfect sequences [] total 143 [2022-01-31 17:57:12,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121360923] [2022-01-31 17:57:12,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:12,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2022-01-31 17:57:12,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:12,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2022-01-31 17:57:12,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10013, Invalid=10293, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 17:57:12,041 INFO L87 Difference]: Start difference. First operand 1003 states and 1010 transitions. Second operand has 143 states, 143 states have (on average 1.1608391608391608) internal successors, (166), 142 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:24,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:24,618 INFO L93 Difference]: Finished difference Result 1867 states and 1887 transitions. [2022-01-31 17:57:24,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2022-01-31 17:57:24,618 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 1.1608391608391608) internal successors, (166), 142 states have internal predecessors, (166), 2 states have call successors, (3), 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 998 [2022-01-31 17:57:24,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:24,619 INFO L225 Difference]: With dead ends: 1867 [2022-01-31 17:57:24,619 INFO L226 Difference]: Without dead ends: 1010 [2022-01-31 17:57:24,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9869 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=30033, Invalid=49773, Unknown=0, NotChecked=0, Total=79806 [2022-01-31 17:57:24,622 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1061 mSolverCounterSat, 4508 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 5569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4508 IncrementalHoareTripleChecker+Valid, 1061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:24,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 51 Invalid, 5569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4508 Valid, 1061 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 17:57:24,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2022-01-31 17:57:24,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 1010. [2022-01-31 17:57:24,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1010 states, 1004 states have (on average 1.0079681274900398) internal successors, (1012), 1004 states have internal predecessors, (1012), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:57:24,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 1017 transitions. [2022-01-31 17:57:24,638 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 1017 transitions. Word has length 998 [2022-01-31 17:57:24,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:24,638 INFO L470 AbstractCegarLoop]: Abstraction has 1010 states and 1017 transitions. [2022-01-31 17:57:24,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 143 states have (on average 1.1608391608391608) internal successors, (166), 142 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:24,638 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 1017 transitions. [2022-01-31 17:57:24,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1006 [2022-01-31 17:57:24,642 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:24,642 INFO L514 BasicCegarLoop]: trace histogram [140, 140, 140, 140, 140, 140, 140, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:24,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2022-01-31 17:57:24,642 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:24,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:24,645 INFO L85 PathProgramCache]: Analyzing trace with hash 385137143, now seen corresponding path program 140 times [2022-01-31 17:57:24,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:24,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845379410] [2022-01-31 17:57:24,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:24,646 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:24,646 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:24,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:24,717 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:25,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:30,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:30,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:30,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:30,089 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:30,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845379410] [2022-01-31 17:57:30,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [845379410] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:30,090 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:30,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [144] imperfect sequences [] total 144 [2022-01-31 17:57:30,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322737040] [2022-01-31 17:57:30,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:30,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 144 states [2022-01-31 17:57:30,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:30,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2022-01-31 17:57:30,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10155, Invalid=10437, Unknown=0, NotChecked=0, Total=20592 [2022-01-31 17:57:30,094 INFO L87 Difference]: Start difference. First operand 1010 states and 1017 transitions. Second operand has 144 states, 144 states have (on average 1.1597222222222223) internal successors, (167), 143 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:42,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:42,582 INFO L93 Difference]: Finished difference Result 1880 states and 1900 transitions. [2022-01-31 17:57:42,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-01-31 17:57:42,583 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 144 states have (on average 1.1597222222222223) internal successors, (167), 143 states have internal predecessors, (167), 2 states have call successors, (3), 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 1005 [2022-01-31 17:57:42,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:42,584 INFO L225 Difference]: With dead ends: 1880 [2022-01-31 17:57:42,584 INFO L226 Difference]: Without dead ends: 1017 [2022-01-31 17:57:42,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 283 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10010 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=30459, Invalid=50481, Unknown=0, NotChecked=0, Total=80940 [2022-01-31 17:57:42,587 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1176 mSolverCounterSat, 5122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 6298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5122 IncrementalHoareTripleChecker+Valid, 1176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:42,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 81 Invalid, 6298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5122 Valid, 1176 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 17:57:42,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2022-01-31 17:57:42,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 1017. [2022-01-31 17:57:42,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1017 states, 1011 states have (on average 1.0079129574678536) internal successors, (1019), 1011 states have internal predecessors, (1019), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:57:42,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 1024 transitions. [2022-01-31 17:57:42,603 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 1024 transitions. Word has length 1005 [2022-01-31 17:57:42,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:42,603 INFO L470 AbstractCegarLoop]: Abstraction has 1017 states and 1024 transitions. [2022-01-31 17:57:42,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 144 states, 144 states have (on average 1.1597222222222223) internal successors, (167), 143 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:42,603 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 1024 transitions. [2022-01-31 17:57:42,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1013 [2022-01-31 17:57:42,607 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:42,607 INFO L514 BasicCegarLoop]: trace histogram [141, 141, 141, 141, 141, 141, 141, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:42,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2022-01-31 17:57:42,607 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:42,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:42,608 INFO L85 PathProgramCache]: Analyzing trace with hash 800633508, now seen corresponding path program 141 times [2022-01-31 17:57:42,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:42,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1696663439] [2022-01-31 17:57:42,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:42,608 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:42,609 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:42,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:42,684 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:43,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:47,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:47,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:47,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:47,871 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:47,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1696663439] [2022-01-31 17:57:47,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1696663439] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:47,872 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:47,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [145] imperfect sequences [] total 145 [2022-01-31 17:57:47,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724625] [2022-01-31 17:57:47,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:47,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2022-01-31 17:57:47,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:47,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2022-01-31 17:57:47,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10298, Invalid=10582, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 17:57:47,876 INFO L87 Difference]: Start difference. First operand 1017 states and 1024 transitions. Second operand has 145 states, 145 states have (on average 1.1586206896551725) internal successors, (168), 144 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:01,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:01,485 INFO L93 Difference]: Finished difference Result 1893 states and 1913 transitions. [2022-01-31 17:58:01,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2022-01-31 17:58:01,485 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 145 states have (on average 1.1586206896551725) internal successors, (168), 144 states have internal predecessors, (168), 2 states have call successors, (3), 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 1012 [2022-01-31 17:58:01,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:01,486 INFO L225 Difference]: With dead ends: 1893 [2022-01-31 17:58:01,486 INFO L226 Difference]: Without dead ends: 1024 [2022-01-31 17:58:01,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 285 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10152 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=30888, Invalid=51194, Unknown=0, NotChecked=0, Total=82082 [2022-01-31 17:58:01,489 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1111 mSolverCounterSat, 4866 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 5977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4866 IncrementalHoareTripleChecker+Valid, 1111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:01,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 61 Invalid, 5977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4866 Valid, 1111 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 17:58:01,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2022-01-31 17:58:01,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 1024. [2022-01-31 17:58:01,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1024 states, 1018 states have (on average 1.0078585461689586) internal successors, (1026), 1018 states have internal predecessors, (1026), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:01,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1031 transitions. [2022-01-31 17:58:01,505 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1031 transitions. Word has length 1012 [2022-01-31 17:58:01,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:01,505 INFO L470 AbstractCegarLoop]: Abstraction has 1024 states and 1031 transitions. [2022-01-31 17:58:01,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 145 states have (on average 1.1586206896551725) internal successors, (168), 144 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:01,505 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1031 transitions. [2022-01-31 17:58:01,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1020 [2022-01-31 17:58:01,509 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:01,510 INFO L514 BasicCegarLoop]: trace histogram [142, 142, 142, 142, 142, 142, 142, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:01,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2022-01-31 17:58:01,510 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:01,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:01,510 INFO L85 PathProgramCache]: Analyzing trace with hash -130245289, now seen corresponding path program 142 times [2022-01-31 17:58:01,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:01,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1898407003] [2022-01-31 17:58:01,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:01,511 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:01,511 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:01,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:01,585 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:02,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat